Debt - Asset-Backed Debt Narrative (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Apr. 25, 2025	Mar. 31, 2025
Debt Instrument [Line Items]
Repayments of debt		$ 1,978
Asset-Backed Debt
Debt Instrument [Line Items]
Secured debt, carrying value		26,300
Secured Debt | Asset Backed Notes
Debt Instrument [Line Items]
Repayments of debt		$ 800
Secured Debt | Asset Backed Notes | Subsequent Event
Debt Instrument [Line Items]
Repayments of debt	$ 932
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