Debt Fair Value of Debt Instruments (Details) - USD ($) $ in Billions	Sep. 30, 2024	Dec. 31, 2023
Debt Disclosure [Abstract]
Fair value of debt excluding finance leases	$ 22.7	$ 22.4
Book value of debt excluding finance leases	$ 23.4	$ 23.4

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

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant