Hedges and Derivative Financial Instruments - Schedule of Outstanding Derivative Contracts (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Hedge Assets	$ 180	$ 145
Hedge Liabilities	224	324
Derivative asset at fair value, current	124	103
Derivative asset at fair value, noncurrent	56	42
Total derivatives, hedge assets at fair value	180	145
Derivative liability at fair value, current	108	152
Derivative liability at fair value, noncurrent	116	172
Total derivatives, hedge liabilities at fair value	224	324
Derivatives accounted for as hedges
Derivatives, Fair Value [Line Items]
Hedge Assets	156	120
Hedge Liabilities	165	228
Derivatives accounted for as hedges | Commodity swaps/options
Derivatives, Fair Value [Line Items]
Notional Amount	260	215
Hedge Assets	57	39
Hedge Liabilities	$ 1	$ 4
Maximum term of commodity swaps/options (in months)	24 months	30 months
Derivatives accounted for as hedges | Foreign exchange forwards/options
Derivatives, Fair Value [Line Items]
Notional Amount	$ 3,025	$ 3,028
Hedge Assets	75	58
Hedge Liabilities	$ 108	$ 110
Maximum term of foreign exchange forwards/options (in months)	128 months	134 months
Derivatives accounted for as hedges | Cross-currency swaps
Derivatives, Fair Value [Line Items]
Notional Amount	$ 1,275	$ 1,275
Hedge Assets	24	23
Hedge Liabilities	$ 49	$ 86
Maximum term of cross-currency swaps (in months)	92 months	98 months
Derivatives accounted for as hedges | Interest rate derivatives
Derivatives, Fair Value [Line Items]
Notional Amount	$ 300	$ 300
Hedge Assets	0	0
Hedge Liabilities	$ 7	$ 28
Maximum term of interest rate derivatives (in months)	47 months	53 months
Derivatives not accounted for as hedges
Derivatives, Fair Value [Line Items]
Hedge Assets	$ 24	$ 25
Hedge Liabilities	59	96
Derivatives not accounted for as hedges | Commodity swaps/options
Derivatives, Fair Value [Line Items]
Notional Amount	1	1
Hedge Assets	0	0
Hedge Liabilities	$ 0	$ 0
Maximum term of commodity swaps/options (in months)	0 months	0 months
Derivatives not accounted for as hedges | Foreign exchange forwards/options
Derivatives, Fair Value [Line Items]
Notional Amount	$ 3,375	$ 4,161
Hedge Assets	24	25
Hedge Liabilities	$ 59	$ 96
Maximum term of foreign exchange forwards/options (in months)	6 months	12 months