Debt Fair Value of Debt Instruments (Details) - USD ($) $ in Billions	Mar. 31, 2023	Dec. 31, 2022
Debt Disclosure [Abstract]
Fair value of debt excluding finance leases	$ 21.5	$ 21.5
Book value of debt excluding finance leases	$ 22.6	$ 23.3

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Balance Type:	credit
Period Type:	instant