Income Taxes (Narrative) (Detail) $ in Millions	Aug. 16, 2022	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Non Variable Interest Entities [Line Items]
NOL carryforward		$ 4,100
Foreign tax credit		58
Unrecognized Tax Benefits		0	$ 0
Valuation allowance on net deferred tax asset		$ 1,200	$ 1,200
Effective income tax rate reconciliation, alternative minimum tax on the book income of large corporations, percent	15
Effective income tax rate reconciliation, excise tax on most stock buybacks, percent.	1