Financial Instruments - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Notional Amounts	$ 6,416	$ 9,831
Fair Value, Assets	147	200
Fair Value, Liabilities	43	81
Prepaid and other current assets
Derivative [Line Items]
Fair Value, Assets	76	110
Other long-term assets
Derivative [Line Items]
Fair Value, Assets	71	90
Other current liabilities
Derivative [Line Items]
Fair Value, Liabilities	37	70
Other long-term liabilities
Derivative [Line Items]
Fair Value, Liabilities	6	11
Derivatives Not Designated as Hedging Instruments:
Derivative [Line Items]
Notional Amounts	4,821	7,553
Fair Value, Assets	53	113
Fair Value, Liabilities	41	67
Derivatives Not Designated as Hedging Instruments: | Balance sheet items
Derivative [Line Items]
Notional Amounts	4,136	6,470
Fair Value, Assets	19	72
Fair Value, Liabilities	29	48
Derivatives Not Designated as Hedging Instruments: | Forecasted transactions
Derivative [Line Items]
Notional Amounts	520	823
Fair Value, Assets	7	16
Fair Value, Liabilities	8	12
Derivatives Not Designated as Hedging Instruments: | Cross-currency swaps
Derivative [Line Items]
Notional Amounts	165	260
Fair Value, Assets	21	24
Fair Value, Liabilities	4	7
Derivatives Not Designated as Hedging Instruments: | Commodity contracts
Derivative [Line Items]
Fair Value, Assets	6	1
Derivatives Designated as Hedging Instruments:
Derivative [Line Items]
Notional Amounts	1,595	2,278
Fair Value, Assets	94	87
Fair Value, Liabilities	2	14
Derivatives Designated as Hedging Instruments: | Forecasted transactions
Derivative [Line Items]
Notional Amounts	322	355
Fair Value, Assets	7	20
Fair Value, Liabilities	2	14
Derivatives Designated as Hedging Instruments: | Commodity contracts
Derivative [Line Items]
Fair Value, Assets	56	3
Derivatives Designated as Hedging Instruments: | Interest rate swaps
Derivative [Line Items]
Notional Amounts	1,273	1,923
Fair Value, Assets	31	64
Fair Value, Liabilities	$ 0	$ 0