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Financial Instruments - Information About Interest Rate Swaps (Details)	Dec. 31, 2021 USD ($) interest_rate_swap	Jan. 31, 2021 USD ($) interest_rate_swap	Dec. 31, 2020 USD ($)
Derivative [Line Items]
Par Value of Debt	$ 8,000,000,000
Total Swap Notional Amount	$ 32,958,000,000		$ 32,784,000,000
Interest Rate Swap
Derivative [Line Items]
Number of Interest Rate Swaps Held | interest_rate_swap	9	5
Total Swap Notional Amount		$ 1,150,000,000
2.40% notes due 2022 | Interest Rate Swap
Derivative [Line Items]
Number of Interest Rate Swaps Held | interest_rate_swap	4
Stated interest rate	2.40%
Par Value of Debt	$ 1,000,000,000
Total Swap Notional Amount	$ 1,000,000,000
2.35% notes due 2022 | Interest Rate Swap
Derivative [Line Items]
Number of Interest Rate Swaps Held | interest_rate_swap	5
Stated interest rate	2.35%
Par Value of Debt	$ 1,250,000,000
Total Swap Notional Amount	$ 1,250,000,000

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