Accumulated Other Comprehensive (Loss) Income (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
AOCI roll forward
Beginning balance	$ 7,451	$ 6,928	$ 6,896	$ 6,864
Other comprehensive income (loss), net of tax	(3)	(26)	(39)	11
Ending balance	7,972	6,966	7,972	6,966
Accumulated Other Comprehensive Income (Loss) [Member]
AOCI roll forward
Beginning balance	(73)	(32)	(37)	(69)
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit)			(38)
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit			(1)
Other comprehensive income (loss), net of tax	(3)	(26)	(39)	11
Ending balance	(76)	$ (58)	(76)	$ (58)
Derivative Instruments [Member]
AOCI roll forward
Beginning balance			17
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit)			(26)
Other comprehensive income (loss), net of tax			(26)
Ending balance	(9)		(9)
Other comprehensive income (loss) before reclassifications, tax			(9)
Amounts reclassified from accumulated other comprehensive (income) loss, tax			0
Available-for-Sale Securities [Member]
AOCI roll forward
Beginning balance			8
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit)			10
Other comprehensive income (loss), net of tax			10
Ending balance	18		18
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			(68)
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit)			(22)
Other comprehensive income (loss), net of tax			(22)
Ending balance	(90)		(90)
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			6
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit			(1)
Other comprehensive income (loss), net of tax			(1)
Ending balance	$ 5		5
Other comprehensive income (loss) before reclassifications, tax			0
Amounts reclassified from accumulated other comprehensive (income) loss, tax			$ 0