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Financing Arrangements and Derivative Financial Instruments - Notes Narrative (Details) - USD ($)
3 Months Ended
Apr. 06, 2021
Mar. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]      
Notes payable   $ 3,846,000,000 $ 3,860,000,000
5.125% due 2023 | Senior Notes      
Debt Instrument [Line Items]      
Debt Instrument, redemption, description   On April 6, 2021, we also issued a notice to redeem our $1.0 billion 5.125% Senior Notes due 2023 on May 6, 2021 at a price of 100% of the principal amount, plus accrued and unpaid interest through the redemption date. The redemption will be funded using the proceeds of the new debt offering, together with cash and cash equivalents.  
Interest rate, stated percentage   5.125% 5.125%
Subsequent Event | 5.125% due 2023 | Senior Notes      
Debt Instrument [Line Items]      
Debt instrument, principal amount $ 1,000,000,000.0    
Interest rate, stated percentage 5.125%    
Debt instrument, redemption price percentage 100.00%    
Debt extinguishment costs related to remaining unamortized debt issuance costs $ 5,000,000    
Subsequent Event | 5.25% due 2031 | Senior Notes      
Debt Instrument [Line Items]      
Debt instrument, principal amount $ 550,000,000    
Interest rate, stated percentage 5.25%    
Subsequent Event | 5.625% due 2033 | Senior Notes      
Debt Instrument [Line Items]      
Debt instrument, principal amount $ 450,000,000    
Interest rate, stated percentage 5.625%