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Derivative Financial Instruments - Impact of Derivatives on Balance Sheet (Detail) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Derivative Assets:    
Derivative assets $ 47 $ 25
Derivative Liabilities:    
Derivative liabilities (79) (244)
Net total derivatives (32) (219)
Designated as Hedging Instrument [Member] | Cash Flow [Member]    
Derivative Assets:    
Derivative assets 0 0
Derivative Liabilities:    
Derivative liabilities 0 0
Net total derivatives 0 0
Designated as Hedging Instrument [Member] | Fair Value [Member]    
Derivative Assets:    
Derivative assets 47 25
Derivative Liabilities:    
Derivative liabilities (79) (244)
Net total derivatives (32) (219)
Trading [Member]    
Derivative Assets:    
Derivative assets 0 0
Derivative Liabilities:    
Derivative liabilities 0 0
Net total derivatives 0 0
Interest Rate Swaps [Member]    
Derivative Assets:    
Derivative assets 43 25
Derivative Liabilities:    
Derivative liabilities 0 0
Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Cash Flow [Member]    
Derivative Assets:    
Derivative assets 0 0
Derivative Liabilities:    
Derivative liabilities 0 0
Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Fair Value [Member]    
Derivative Assets:    
Derivative assets 43 25
Derivative Liabilities:    
Derivative liabilities 0 0
Interest Rate Swaps [Member] | Trading [Member]    
Derivative Assets:    
Derivative assets 0 0
Derivative Liabilities:    
Derivative liabilities 0 0
Cross-Currency Interest Rate Swaps [Member]    
Derivative Assets:    
Derivative assets 4 0
Derivative Liabilities:    
Derivative liabilities (79) (244)
Cross-Currency Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Cash Flow [Member]    
Derivative Assets:    
Derivative assets 0 0
Derivative Liabilities:    
Derivative liabilities 0 0
Cross-Currency Interest Rate Swaps [Member] | Designated as Hedging Instrument [Member] | Fair Value [Member]    
Derivative Assets:    
Derivative assets 4 0
Derivative Liabilities:    
Derivative liabilities (79) (244)
Cross-Currency Interest Rate Swaps [Member] | Trading [Member]    
Derivative Assets:    
Derivative assets   0
Derivative Liabilities:    
Derivative liabilities $ 0 $ 0