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Debt and Derivative Instruments (Narrative) (Details)
12 Months Ended
Feb. 02, 2020
USD ($)
Debt Instrument [Line Items]  
Debt instrument, redemption price, percentage 100.00%
Debt instrument, change of control, redemption price, percent 101.00%
Revolving Credit Facility  
Debt Instrument [Line Items]  
Maximum borrowing capacity of credit facility $ 3,000,000,000.0
5-year Back-up Credit Facility | Revolving Credit Facility  
Debt Instrument [Line Items]  
Maximum borrowing capacity of credit facility $ 2,000,000,000.0
Floating rate senior notes due March 2022 | London Interbank Offered Rate (LIBOR)  
Debt Instrument [Line Items]  
Debt instrument, basis spread on variable rate 0.31%