Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
AOCI roll forward
Beginning balance	$ 8,651	$ 7,078	$ 8,254	$ 6,896
Other comprehensive income (loss), net of tax	96	(13)	124	(36)
Ending balance	9,202	7,451	9,202	7,451
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI roll forward
Beginning balance	(87)	(60)	(115)	(37)
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit)			128
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit			(4)
Other comprehensive income (loss), net of tax	96	(13)	124	(36)
Ending balance	9	$ (73)	9	$ (73)
Derivative Instruments [Member]
AOCI roll forward
Beginning balance			44
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit)			3
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit			(4)
Other comprehensive income (loss), net of tax			(1)
Ending balance	43		43
Other comprehensive income (loss) before reclassifications, tax			(1)
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)			8
Other comprehensive income (loss), net of tax			8
Ending balance	23		23
Other comprehensive income (loss) before reclassifications, tax			3
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)			117
Other comprehensive income (loss), net of tax			117
Ending balance	(62)		(62)
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		5
Other comprehensive income (loss) before reclassifications, tax			0
Amounts reclassified from accumulated other comprehensive (income) loss, tax			$ 0