Segment Reporting - Core Earnings Adjustments to GAAP (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Adjustments Required To Reconcile Core Earnings [Line Items]
Net income	$ 111	$ 255
Net tax effect	(33)	(77)
Operating Segments [Member]
Adjustments Required To Reconcile Core Earnings [Line Items]
Net income	133	135
Net tax effect	(41)	(42)
Total Adjustments [Member] | Adjustments [Member]
Adjustments Required To Reconcile Core Earnings [Line Items]
Net income	22	(120)
Core Earnings adjustments to GAAP	30	(155)
Net tax effect	(8)	35
Net Impact of Derivative Accounting [Member] | Total Adjustments [Member] | Adjustments [Member]
Adjustments Required To Reconcile Core Earnings [Line Items]
Core Earnings adjustments to GAAP	27	(159)
Net Impact of Goodwill and Acquired Intangible Assets [Member] | Total Adjustments [Member] | Adjustments [Member]
Adjustments Required To Reconcile Core Earnings [Line Items]
Core Earnings adjustments to GAAP	$ 3	$ 4