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Long-Term Debt (Debt Tender Offers and Redemption (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Mar. 31, 2021
Debt Instrument [Line Items]        
Premiums and fees $ 623,000,000      
Write-off of unamortized debt discounts and debt issuance costs 26,000,000      
Total $ 649,000,000 $ 0 $ 0  
Senior Notes [Member]        
Debt Instrument [Line Items]        
Principal Amount of Notes Purchased       $ 4,042,000,000
USD Notes, 2.850% [Member] | Senior Notes [Member]        
Debt Instrument [Line Items]        
Interest Rate 2.85%      
Principal Amount of Notes Purchased       795,000,000
USD Notes, 2.950% [Member] | Senior Notes [Member]        
Debt Instrument [Line Items]        
Interest Rate 2.95%      
Principal Amount of Notes Purchased       132,000,000
USD Notes, 4.000% [Member] | Senior Notes [Member]        
Debt Instrument [Line Items]        
Interest Rate 4.00%      
Principal Amount of Notes Purchased       624,000,000
USD Notes, 3.800% [Member] | Senior Notes [Member]        
Debt Instrument [Line Items]        
Interest Rate 3.80%      
Principal Amount of Notes Purchased       655,000,000
USD Notes, 4.400% [Member] | Senior Notes [Member]        
Debt Instrument [Line Items]        
Interest Rate 4.40%      
Principal Amount of Notes Purchased       430,000,000
USD Notes, 4.800% [Member] | Senior Notes [Member]        
Debt Instrument [Line Items]        
Interest Rate 4.80%      
Principal Amount of Notes Purchased       1,094,000,000
USD Notes, 9.950% [Member] | Senior Notes [Member]        
Debt Instrument [Line Items]        
Interest Rate 9.95%      
Principal Amount of Notes Purchased       65,000,000
USD Notes, 10.200% [Member] | Senior Notes [Member]        
Debt Instrument [Line Items]        
Interest Rate 10.20%      
Principal Amount of Notes Purchased       18,000,000
USD Notes, 6.200% [Member] | Senior Notes [Member]        
Debt Instrument [Line Items]        
Interest Rate 6.20%      
Principal Amount of Notes Purchased       $ 229,000,000