Fair Value Measurements - Fair Value of Other Financial Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Fair value disclosures
Long-term debt	$ 3,115	$ 3,125
Current maturities	(25)	0
Long-term debt, excluding current maturities	3,090	3,125
Carrying Amount
Fair value disclosures
Long-term debt	3,115	3,125
Current maturities	(25)	0
Long-term debt, excluding current maturities	3,090	3,125
Estimated Fair Value
Fair value disclosures
Long-term debt	2,999	3,163
Current maturities	(25)	0
Long-term debt, excluding current maturities	$ 2,974	$ 3,163

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

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