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Long-term Debt and Borrowing Facilities - Issuance and Repurchase of Notes (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Oct. 30, 2021
Oct. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Jul. 31, 2019
Jun. 30, 2019
Oct. 30, 2021
May 01, 2021
Oct. 31, 2020
Aug. 03, 2019
Jan. 29, 2022
Jan. 30, 2021
Feb. 01, 2020
Sep. 30, 2021
Apr. 30, 2021
Debt Instrument [Line Items]                              
Interest paid, including capitalized interest, operating and investing activities                     $ 354 $ 415 $ 357    
Repayments of long-term debt         $ 130 $ 669         1,716 [1] 1,307 [1] 799 [1]    
Loss on extinguishment of debt                 $ 53 $ 40 195 [1] $ 53 [1] $ 40 [1]    
Extinguishment of debt, gain (loss), net of tax                 40 $ 30          
$247 million, 7.60% Fixed Interest Rate Notes due July 2037 (“2037 Notes”)                              
Debt Instrument [Line Items]                              
Debt instrument, repurchased face amount   $ 53             53            
2022 Notes, 2023 Notes and 2037 Notes                              
Debt Instrument [Line Items]                              
Debt instrument, repurchase amount   844             844            
With Subsidiary Guarantee                              
Debt Instrument [Line Items]                              
Loss on extinguishment of debt             $ 89 $ 105              
Extinguishment of debt, gain (loss), net of tax             $ 68 $ 80              
With Subsidiary Guarantee | $1 billion, 6.625% Fixed Interest Rate Notes due October 2030 ("2030 Notes")                              
Debt Instrument [Line Items]                              
Debt instrument, face amount     $ 1,000                        
Interest rate     6.625%                        
Proceeds from issuance of debt     $ 988                        
Issuance cost     $ 12                        
With Subsidiary Guarantee | $750 million, 6.875% Fixed Interest Rate Secured Notes due July 2025 ("2025 Secured Notes")                              
Debt Instrument [Line Items]                              
Debt instrument, face amount       $ 750             $ 750        
Interest rate       6.875%             6.875%        
Proceeds from issuance of debt       $ 738                      
Issuance cost       12                      
Debt instrument, repurchased face amount                             $ 750
With Subsidiary Guarantee | $320 million, 9.375% Fixed Interest Rate Notes due July 2025 ("2025 Notes")                              
Debt Instrument [Line Items]                              
Debt instrument, face amount       $ 500             $ 320        
Interest rate       9.375%             9.375%        
Proceeds from issuance of debt       $ 492                      
Issuance cost       $ 8                      
Debt instrument, repurchased face amount                           $ 180  
With Subsidiary Guarantee | $500 million, 7.50% Fixed Interest Rate Notes due June 2029 ("2029 Notes")                              
Debt Instrument [Line Items]                              
Debt instrument, face amount                     $ 500        
Interest rate                     7.50%        
With Subsidiary Guarantee | $1 billion, 5.625% Fixed Interest Rate Notes due February 2022 (“2022 Notes”)                              
Debt Instrument [Line Items]                              
Debt instrument, face amount                     $ 1,000        
Interest rate                     5.625%        
Debt instrument, repurchased face amount   576             576           $ 285
Extinguishment of debt, amount           96                  
With Subsidiary Guarantee | $500 million, 5.625% Fixed Interest Rate Notes due October 2023 (“2023 Notes”)                              
Debt Instrument [Line Items]                              
Debt instrument, face amount                     $ 500        
Interest rate                     5.625%        
Debt instrument, repurchased face amount   180             $ 180         270  
Extinguishment of debt, amount $ 50                            
Repayments of long-term debt $ 54                            
With Subsidiary Guarantee | $1 billion, 6.625% Fixed Interest Rate Notes due April 2021 (“2021 Notes”)                              
Debt Instrument [Line Items]                              
Extinguishment of debt, amount   450       330                  
Repayments of long-term debt   $ 463                          
With Subsidiary Guarantee | Fixed Rate 7.00% Notes due May 2020                              
Debt Instrument [Line Items]                              
Extinguishment of debt, amount         $ 126 $ 212                  
With Subsidiary Guarantee | 2023 Notes and 2025 Notes                              
Debt Instrument [Line Items]                              
Debt instrument, repurchase amount                           $ 532  
[1] The cash flows related to discontinued operations have not been segregated. Accordingly, the Consolidated Statements of Cash Flows include the results of continuing and discontinued operations.