Fair Value Measurements - Debt (Detail) - USD ($) $ in Billions	Sep. 30, 2023	Dec. 31, 2022
Reported Value Measurement [Member]
Fair Value
Fair value of debt	$ 15.4	$ 15.0
Significant Other Observable Inputs (Level 2) [Member] \| Estimate of Fair Value Measurement [Member]
Fair Value
Fair value of debt	$ 13.8	$ 13.8

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

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-Topic 470
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Name:	us-gaap_DebtInstrumentFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant