Fair Value Measurements - Fair Values and Related Carrying Values of Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable, net, carrying amount	$ 283	$ 385
Notes receivable, net, fair value	294	403
Debt, excluding capital lease obligations, carrying amount	(52,031)	(56,794)
Debt, excluding capital lease obligations, fair value	(47,481)	(52,856)
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Notes receivable, net, fair value	294	403
Debt, excluding capital lease obligations, fair value	$ (47,481)	$ (52,856)

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

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

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Fair value portion of an agreement for an unconditional promise by the maker to pay the holder a definite sum of money at a future date.

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Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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