Annual report pursuant to Section 13 and 15(d)

Retirement Benefit Plans (Net Periodic Expense) (Details)

v2.4.0.6
Retirement Benefit Plans (Net Periodic Expense) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jan. 28, 2012
Jan. 29, 2011
Jan. 30, 2010
Service cost $ 90 $ 89 $ 83
Interest cost 260 262 270
Projected return on assets (385) (352) (304)
Amortization of prior service (credit) 156 256 288
Net periodic plan expense/(income) 121 255 337
Benefits Plan Primary Plan [Member]
     
Service cost 88 88 80
Interest cost 247 248 253
Projected return on assets (385) (352) (304)
Amortization of prior service (credit) 137 237 269
Net periodic plan expense/(income) 87 221 298
Benefits Supplemental Plan [Member]
     
Service cost 2 1 3
Interest cost 13 14 17
Amortization of prior service (credit) 19 19 19
Net periodic plan expense/(income) 34 34 39
Other Postretirement Benefit Plans, Defined Benefit [Member]
     
Interest cost 1 1 1
Amortization of prior service (credit) (26) (26) (26)
Net periodic plan expense/(income) $ (25) $ (25) $ (25)
Description of Defined Contribution Pension and Other Postretirement Plans