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Debt - Asset-Backed Debt Narrative (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2024
Debt Instrument [Line Items]      
Repayments of debt $ 796 $ 2,028 $ 2,824
Asset-Backed Debt      
Debt Instrument [Line Items]      
Secured debt, carrying value $ 24,000   24,000
Secured Debt | Asset Backed Notes      
Debt Instrument [Line Items]      
Repayments of debt     $ 2,200
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