Fair Value Disclosure (Details) - Fair value measurements, nonrecurring - Fair value inputs, Level 2 - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Carrying Amount
Fair Value Disclosure
Liabilities—Long-term debt (excluding finance lease and other obligations)	$ 2,153	$ 2,154
Fair Value
Fair Value Disclosure
Liabilities—Long-term debt (excluding finance lease and other obligations)	$ 1,386	$ 1,691

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

No definition available.

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