Fair Value Measurements and Financial Instruments - Derivative Activity (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Interest rate swaps \| Fair Value Hedges \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount of derivative instruments entered during period	$ 7,155	$ 6,050
Notional amount of derivative settled	863	4,018
Cash received (paid) for settlement of derivative	40	107
Interest rate swaps \| Fair Value Hedges \| Designated as Hedging Instrument \| Interest Expense
Derivatives, Fair Value [Line Items]
Pre-tax gain recognized in Interest expense	2	2
Cross currency swaps \| Fair Value Hedges \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Pre-tax loss on cross currency swaps recognized in Interest expense	(1,373)
Pre-tax gain on hedged debt recognized in Interest expense	1,373
Excluded components	(498)
Cross currency swaps \| Fair Value Hedges \| Designated as Hedging Instrument \| Interest Expense
Derivatives, Fair Value [Line Items]
Excluded components	81
Cross currency swaps \| Cash Flow Hedges \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount of derivative instruments entered during period	2,474	6,214
Notional amount of derivative settled	0	0
Pre-tax gain recognized in Other comprehensive loss	(430)	(2,285)
Forward starting interest rate swaps \| Cash Flow Hedges \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount of derivative instruments entered during period	0	0
Notional amount of derivative settled	1,000	1,000
Pre-tax gain recognized in Other comprehensive loss	196	258
Cash received (paid) for settlement of derivative	(107)	(237)
Treasury rate locks \| Cash Flow Hedges \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount of derivative instruments entered during period	0	4,650
Notional amount of derivative settled	0	4,650
Pre-tax gain recognized in Other comprehensive loss	0	251
Cash received (paid) for settlement of derivative	0	251
Foreign exchange forwards \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount of derivative instruments entered during period	10,689	12,604
Notional amount of derivative settled	10,701	13,077
Pre-tax gain recognized in Other comprehensive loss	(97)	(62)
Swaption \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Notional amount of derivative settled	1,000	2,000
Pre-tax gain recognized in Other comprehensive loss	$ (33)	$ 11

Amount of gain from excluded component of derivative hedge, recognized in earnings. Excludes recognition under systematic and rational method.

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