Stockholders' Equity (Accumulated Other Comprehensive Income/ (Loss) (Details) - USD ($)
 3 Months Ended 9 Months Ended
Oct. 31, 2020
Aug. 01, 2020
May 02, 2020
Nov. 02, 2019
Oct. 31, 2020
Nov. 02, 2019
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
February 1, 2020     $ (387,000,000)   $ (387,000,000)  
Discontinuance of hedge accounting (1)     64,000,000      
Other comprehensive income/(loss) before reclassifications [1] $ 0     $ 6,000,000 0 $ 49,000,000
August 1, 2020 (374,000,000)     (318,000,000) (374,000,000) (318,000,000)
Discontinuance of hedge accounting charge reclassified to income tax expense       0   0
Net Actuarial Gain/(Loss)            
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
February 1, 2020     (310,000,000)   (310,000,000) (290,000,000)
Discontinuance of hedge accounting (1)         0  
Other comprehensive income/(loss) before reclassifications         58,000,000 0
Amounts reclassified from accumulated other comprehensive income/(loss)         0 0
August 1, 2020 (368,000,000)     (244,000,000) (368,000,000) (244,000,000)
Net Actuarial Gain/(Loss) | Cumulative Effect, Period of Adoption, Adjustment            
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
February 1, 2020           46,000,000
Prior Service Credit/(Cost)            
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
February 1, 2020     (12,000,000)   (12,000,000) (22,000,000)
Discontinuance of hedge accounting (1)         0  
Other comprehensive income/(loss) before reclassifications         (4,000,000) 0
Amounts reclassified from accumulated other comprehensive income/(loss)         (4,000,000) (6,000,000)
August 1, 2020 (4,000,000)     (13,000,000) (4,000,000) (13,000,000)
Prior Service Credit/(Cost) | Cumulative Effect, Period of Adoption, Adjustment            
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
February 1, 2020           3,000,000
Foreign Currency Translation            
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
February 1, 2020     (1,000,000)   (1,000,000) (1,000,000)
Discontinuance of hedge accounting (1)         0  
Other comprehensive income/(loss) before reclassifications         0 0
Amounts reclassified from accumulated other comprehensive income/(loss)           0
August 1, 2020 (2,000,000)     (1,000,000) (2,000,000) (1,000,000)
Foreign Currency Translation | Cumulative Effect, Period of Adoption, Adjustment            
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
February 1, 2020           0
Gain/(Loss) on Cash Flow Hedges            
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
February 1, 2020     (64,000,000)   (64,000,000) (15,000,000)
Discontinuance of hedge accounting (1)         64,000,000  
Other comprehensive income/(loss) before reclassifications         0 44,000,000
Amounts reclassified from accumulated other comprehensive income/(loss)         0 5,000,000
August 1, 2020 0     (60,000,000) 0 (60,000,000)
Charge reclassified to earnings and included in Discontinuance of hedge accounting   $ 58,000,000        
Discontinuance of hedge accounting charge reclassified to income tax expense   $ 6,000,000        
Gain/(Loss) on Cash Flow Hedges | Cumulative Effect, Period of Adoption, Adjustment            
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
February 1, 2020           4,000,000
Accumulated Other Comprehensive Income/(Loss)            
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
February 1, 2020     (387,000,000)   (387,000,000) (328,000,000)
Discontinuance of hedge accounting (1)     $ 64,000,000   64,000,000  
Other comprehensive income/(loss) before reclassifications         54,000,000 44,000,000
Amounts reclassified from accumulated other comprehensive income/(loss)         (3,000,000) (1,000,000)
August 1, 2020 $ (374,000,000)     $ (318,000,000) $ (374,000,000) (318,000,000)
Accumulated Other Comprehensive Income/(Loss) | Cumulative Effect, Period of Adoption, Adjustment            
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]            
February 1, 2020           $ 53,000,000
[1] Net of $0 million in tax in the three and nine months ended November 2, 2019. Pre-tax amounts of $(1) million and $(5) million in the three and nine months ended November, 2, 2019, respectively, were recognized in net interest expense in the unaudited Interim Consolidated Statements of Operations.