Debt - Asset-Backed Debt Narrative (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 25, 2025	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2025
Debt Instrument [Line Items]
Repayments of debt		$ 2,158	$ 1,978	$ 4,136
Asset-Backed Debt
Debt Instrument [Line Items]
Secured debt, carrying value		$ 26,600		26,600
Asset Backed Notes | Subsequent Event
Debt Instrument [Line Items]
Repayments of debt	$ 479
Secured Debt | Asset Backed Notes
Debt Instrument [Line Items]
Repayments of debt				$ 2,300
Secured Debt | Asset Backed Notes | Term One
Debt Instrument [Line Items]
Revolving period				2 years
Secured Debt | Asset Backed Notes | Term Two
Debt Instrument [Line Items]
Revolving period				3 years
Secured Debt | Asset Backed Notes | Term Three
Debt Instrument [Line Items]
Revolving period				5 years