v3.25.2
Transactions Involving Related Parties - Summary of Balance Sheet Impact of Transactions with Parent and Affiliated Companies (Detail) - USD ($)
$ in Millions
Jun. 30, 2025
Mar. 31, 2025
Other liabilities:    
Operating lease liabilities $ 53 $ 55
Affiliated Entity    
Finance receivables, net:    
Unearned subsidy income (799) (731)
Investment in operating leases, net:    
Unearned subsidy income (1,235) (1,290)
Due from Parent and affiliated companies 112 146
Debt:    
Due to Parent and affiliated companies 155 181
Other liabilities:    
Accrued benefit expenses 66 65
Operating lease liabilities 8 8
Related Party    
Debt:    
Related party debt 1,000 1,800
Accrued interest expense:    
Related party debt $ 9 $ 11