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Derivative Financial Instruments - Fair Value of Derivatives Outstanding (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Total derivatives, assets at fair value $ 42 $ 65
Total derivatives, accrued liabilities at fair value 43 57
Derivatives Designated as Cash Flow Hedges    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Total derivatives, assets at fair value 32 58
Total derivatives, accrued liabilities at fair value 43 57
Prepaid and other current assets    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Total derivatives, assets at fair value 42 65
Currency Contracts | Derivatives Designated as Cash Flow Hedges    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Total derivatives, assets at fair value 32 58
Total derivatives, accrued liabilities at fair value 0 0
Currency Contracts | Derivatives Not Designated as Cash Flow Hedges    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Total derivatives, assets at fair value 10 7
Total derivatives, accrued liabilities at fair value 0 0
Interest Rate Swaps | Derivatives Designated as Cash Flow Hedges    
Derivative Instruments and Hedging Activities Disclosures [Line Items]    
Total derivatives, assets at fair value 0 0
Total derivatives, accrued liabilities at fair value $ 43 $ 57