Financial Instruments and Fair Value Measurements - Summary of Activity in Interest Rate Contracts (Detail) - Interest Rate Contracts [Member] - Cash Flow Hedges [Member] - Designated As Hedging Instrument [Member] - USD ($)	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Derivative [Line Items]
Notional amounts at January 1	$ 1,250,000,000	$ 597,000,000
New contracts	846,000,000	2,441,000,000
Matured, expired or settled contracts	(1,996,000,000)	(2,759,000,000)
Notional amounts at September 30	100,000,000	279,000,000
EUR
Derivative [Line Items]
Notional amounts at January 1	700,000,000	447,000,000
New contracts	0	691,000,000
Matured, expired or settled contracts	(700,000,000)	(859,000,000)
Notional amounts at September 30	0	279,000,000
USD
Derivative [Line Items]
Notional amounts at January 1	550,000,000	150,000,000
New contracts	600,000,000	1,750,000,000
Matured, expired or settled contracts	(1,050,000,000)	(1,900,000,000)
Notional amounts at September 30	100,000,000	$ 0
GBP
Derivative [Line Items]
Notional amounts at January 1	0
New contracts	246,000,000
Matured, expired or settled contracts	(246,000,000)
Notional amounts at September 30	$ 0