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Fair Value Measurements and Financial Instruments - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Carrying Value
Debt Instrument [Line Items]
Carrying value of long-term debt	$ 7,600	$ 7,206
Fair Value, Inputs, Level 2
Debt Instrument [Line Items]
Estimated fair value of long-term debt	$ 7,645	$ 7,651

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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