Debt - Asset-Backed Debt Narrative (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 28, 2023	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2023
Debt Instrument [Line Items]
Repayments of debt		$ 810	$ 1,040	$ 1,850
Asset-Backed Debt
Debt Instrument [Line Items]
Secured debt, carrying value		$ 21,300		21,300
Secured Debt | Asset Backed Notes
Debt Instrument [Line Items]
Repayments of debt				$ 1,700
Secured Debt | Asset Backed Notes | Subsequent Event
Debt Instrument [Line Items]
Repayments of debt	$ 900
Secured Debt | Asset Backed Notes | Term One
Debt Instrument [Line Items]
Revolving period				18 months
Secured Debt | Asset Backed Notes | Term Two
Debt Instrument [Line Items]
Revolving period				2 years
Secured Debt | Asset Backed Notes | Term Three
Debt Instrument [Line Items]
Revolving period				3 years
Secured Debt | Asset Backed Notes | Term Four
Debt Instrument [Line Items]
Revolving period				5 years