Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
AOCI roll forward
Beginning balance	$ 8,254	$ 6,896
Other comprehensive income (loss), net of tax	28	(23)
Ending balance	8,651	7,078
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI roll forward
Beginning balance	(115)	(37)
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit)	30
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit	(2)
Other comprehensive income (loss), net of tax	28	(23)
Ending balance	(87)	$ (60)
Derivative Instruments [Member]
AOCI roll forward
Beginning balance	44
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit)	11
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit	(2)
Other comprehensive income (loss), net of tax	9
Ending balance	53
Other comprehensive income (loss) before reclassifications, tax	4
Amounts reclassified from accumulated other comprehensive (income) loss, tax	(1)
Available-for-Sale Securities [Member]
AOCI roll forward
Beginning balance	15
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit)	2
Other comprehensive income (loss), net of tax	2
Ending balance	17
Other comprehensive income (loss) before reclassifications, tax	1
Amounts reclassified from accumulated other comprehensive (income) loss, tax	0
Foreign Currency Translation Adjustments [Member]
AOCI roll forward
Beginning balance	(179)
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit)	17
Other comprehensive income (loss), net of tax	17
Ending balance	(162)
Other comprehensive income (loss) before reclassifications, tax	0
Amounts reclassified from accumulated other comprehensive (income) loss, tax	0
Post - Retirement Benefit Obligations [Member]
AOCI roll forward
Beginning balance	5
Ending balance	5
Other comprehensive income (loss) before reclassifications, tax	0
Amounts reclassified from accumulated other comprehensive (income) loss, tax	$ 0