Annual report pursuant to Section 13 and 15(d)

Retirement Benefit Plans (Level 3 Investment Assets) (Details)

v3.20.1
Retirement Benefit Plans (Level 3 Investment Assets) (Details)
$ in Millions
12 Months Ended
Feb. 01, 2020
USD ($)
manager
Feb. 02, 2019
USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Number of hedge fund managers (more than) | manager 30  
Corporate bonds [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of year $ 4 $ 10
Purchases and issuances 0 0
Sales, maturities and settlements 0 (6)
Balance, end of year 4 4
Corporate loans [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of year 6 4
Purchases and issuances 0 3
Sales, maturities and settlements 0 (1)
Balance, end of year $ 6 $ 6