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 ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Derivative [Line Items]
Notional amounts at January 1	$ 280	$ 1,250
New contracts	1,071	546
Matured, expired or settled contracts	(1,219)	(1,496)
Notional amounts at June 30	132	300
CAD
Derivative [Line Items]
Notional amounts at January 1	0
New contracts	139
Matured, expired or settled contracts	(139)
Notional amounts at June 30	0
EUR
Derivative [Line Items]
Notional amounts at January 1	0	700
New contracts	57	0
Matured, expired or settled contracts	0	(700)
Notional amounts at June 30	57	0
GBP
Derivative [Line Items]
Notional amounts at January 1		0
New contracts		246
Matured, expired or settled contracts		(246)
Notional amounts at June 30		0
USD
Derivative [Line Items]
Notional amounts at January 1	280	550
New contracts	875	300
Matured, expired or settled contracts	(1,080)	(550)
Notional amounts at June 30	$ 75	$ 300