Annual report pursuant to Section 13 and 15(d)

Retirement Benefit Plans (Investments at Fair Value) (Details)

v3.3.1.900
Retirement Benefit Plans (Investments at Fair Value) (Details) - USD ($)
$ in Millions
12 Months Ended
Jan. 30, 2016
Jan. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Total investment assets at fair value $ 4,252 $ 5,943
Total investment liabilities at fair value (807)  
Accounts payable, net (158) (36)
Total net assets $ 3,287 5,474
Plan assets at fair value, description Cash – Cash is valued at cost which approximates fair value, and is classified as level 1 of the fair value hierarchy.   Common Collective Trusts – Common collective trusts are pools of investments within cash equivalents, equity and fixed income that are benchmarked relative to a comparable index. They are valued on the basis of the relative interest of each participating investor in the fair value of the underlying assets. The underlying assets are valued at net asset value (NAV) and are classified as level 2 of the fair value hierarchy.   Equity Securities – Equity securities are common stocks and preferred stocks valued based on the price of the security as listed on an open active exchange and classified as level 1 of the fair value hierarchy, as well as warrants and preferred stock that are valued at a price, which is based on a broker quote in an over-the-counter market, and are classified as level 2 of the fair value hierarchy.   Private Equity – Private equity is composed of interests in private equity funds valued on the basis of the relative interest of each participating investor in the fair value of the underlying assets and/or common stock of privately held companies. There are no observable market values for private equity funds. The valuations for the funds are derived using a combination of different methodologies including (1) the market approach, which consists of analyzing market transactions for comparable assets, (2) the income approach using the discounted cash flow model, or (3) cost method. Private equity funds also provide audited financial statements. Private equity investments are classified as level 3 of the fair value hierarchy. Corporate Bonds – Corporate bonds and Corporate loans are valued at a price which is based on observable market information in primary markets or a broker quote in an over-the-counter market, and are classified as level 2 or level 3 of the fair value hierarchy.    Swaps – swap contracts are based on broker quotes in an over-the-counter market and are classified as level 2 of the fair value hierarchy.   Government, Municipal Bonds and Mortgaged Backed Securities  – Government and municipal securities are valued at a price based on a broker quote in an over-the-counter market and classified as level 2 of the fair value hierarchy. Mortgage backed securities are valued at a price based on observable market information or a broker quote in an over-the-counter market and classified as level 2 of the fair value hierarchy.   Other fixed income – non-mortgage asset backed securities, collateral held in short-term investments for derivative contract and derivatives composed of futures contracts, option contracts and other fix income derivatives valued at a price based on observable market information or a broker quote in an over-the-counter market and classified as level 2 of the fair value hierarchy.       Real Estate – Real estate is comprised of public and private real estate investments. Real estate investments through registered investment companies that trade on an exchange are classified as level 1 of the fair value hierarchy. Investments through open end private real estate funds that are valued at the reported NAV are classified as level 2 of the fair value hierarchy. Private real estate investments through partnership interests that are valued based on different methodologies including discounted cash flow, direct capitalization and market comparable analysis are classified as level 3 of the fair value hierarchy. Hedge Fund – Hedge funds exposure is through fund of funds, which are made up of over 30 different hedge fund managers diversified over different hedge strategies. The fair value of the hedge fund is determined by the fund's administrator using valuation provided by the third party administrator for each of the underlying funds.  
Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value [1] $ 0  
Total investment assets at fair value 401 [1] 947 [2]
Total investment liabilities at fair value 0 [1] (2) [2]
Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Total investment assets at fair value 3,230 [1] 4,236 [2]
Total investment liabilities at fair value (807) [1] (431) [2]
Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0  
Total investment assets at fair value 621 760
Total investment liabilities at fair value 0 0
Cash and cash equivalents total [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 513 50
Cash and cash equivalents total [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 86 [1] 10 [2]
Cash and cash equivalents total [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 427 [1] 40 [2]
Cash and cash equivalents total [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 0
Cash, benefit plan [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 86 12
Cash, benefit plan [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 86 [1] 10 [2]
Cash, benefit plan [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 2 [2]
Cash, benefit plan [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 0
Common collective trusts [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 427 38
Common collective trusts [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value [2]   0
Common collective trusts [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 427 [1] 38 [2]
Common collective trusts [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value   0
Equity securities total [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 695 1,537
Equity securities total [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 281 [1] 837 [2]
Equity securities total [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 166 [1] 419 [2]
Equity securities total [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 248 281
Equity securities held within common collective trusts, domestic [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 222
Equity securities held within common collective trusts, domestic [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Equity securities held within common collective trusts, domestic [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 222 [2]
Equity securities held within common collective trusts, domestic [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 0
Equity securities held within common collective trusts, international [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 166 197
Equity securities held within common collective trusts, international [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Equity securities held within common collective trusts, international [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 166 [1] 197 [2]
Equity securities held within common collective trusts, international [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 0
Equity securities, domestic [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 192 733
Equity securities, domestic [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 192 [1] 733 [2]
Equity securities, domestic [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Equity securities, domestic [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 0
Equity securities, international [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 89 104
Equity securities, international [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 89 [1] 104 [2]
Equity securities, international [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Equity securities, international [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 0
Private equity [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 248 281
Private equity [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Private equity [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Private equity [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 248 281
Fixed income total [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 2,631 3,769
Investment liabilities at fair value (807) (433)
Total investment liabilities at fair value   (433)
Fixed income total [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Investment liabilities at fair value 0 [1] (2) [2]
Fixed income total [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 2,623 [1] 3,757 [2]
Investment liabilities at fair value (807) [1] (431) [2]
Fixed income total [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 8 12
Investment liabilities at fair value 0 0
Debt securities held within common collective trusts [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 676 1,695
Debt securities held within common collective trusts [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Debt securities held within common collective trusts [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 676 [1] 1,695 [2]
Debt securities held within common collective trusts [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 0
Corporate bonds [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 776 1,326
Corporate bonds [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Corporate bonds [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 771 [1] 1,319 [2]
Corporate bonds [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 5 7
Swaps [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 787 415
Investment liabilities at fair value (801) (428)
Swaps [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Investment liabilities at fair value 0 [1] 0 [2]
Swaps [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 787 [1] 415 [2]
Investment liabilities at fair value (801) [1] (428) [2]
Swaps [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 0
Investment liabilities at fair value 0 0
Corporate loans [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 74
Corporate loans [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Corporate loans [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 69 [2]
Corporate loans [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 5
Municipal Bonds [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 66
Municipal Bonds [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Municipal Bonds [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 66 [2]
Municipal Bonds [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 0
Asset-backed Securities [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 4 5
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 4 [1] 5 [2]
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 0
Government securities [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 230 167
Government securities [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Government securities [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 230 [1] 167 [2]
Government securities [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 0
Other fixed income [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 158 21
Investment liabilities at fair value (6) (5)
Other fixed income [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Investment liabilities at fair value 0 [1] (2) [2]
Other fixed income [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 155 [1] 21 [2]
Investment liabilities at fair value (6) [1] (3) [2]
Other fixed income [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 3 0
Investment liabilities at fair value 0 0
Real estate total [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 199 273
Real estate total [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 34 [1] 100 [2]
Real estate total [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 14 [1] 20 [2]
Real estate total [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 151 153
Public REITs [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 34 100
Public REITs [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 34 [1] 100 [2]
Public REITs [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Public REITs [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 0
Private real estate [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 165 173
Private real estate [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 0 [1] 0 [2]
Private real estate [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 14 [1] 20 [2]
Private real estate [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 151 153
Other Investments [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 214 314
Other Investments [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value [1] 0 0
Other Investments [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value [1] 0 0
Other Investments [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 214 314
Hedge Funds [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value 214 314
Hedge Funds [Member] | Fair Value, Inputs, Level 1 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value [1] 0 0
Hedge Funds [Member] | Fair Value, Inputs, Level 2 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value [1] 0 0
Hedge Funds [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Investments at fair value $ 214 $ 314
[1] There were no significant transfers in or out of level 1 or 2 investments.
[2] There were no significant transfers in or out of level 1 or 2 investments.