Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Pretax Income	$ 1,362	$ 701	$ 618
Income Tax Expense (Benefit)
Federal income taxes and rate	286	147	130
State and local income taxes, net of federal income tax benefit	53	16	14
Non-taxable bargain purchase gain	(105)	0	0
Domestic tax credits	(20)	(5)	(5)
Effect of BOLI surrender	48	0	0
Deferred tax liability adjustment	(8)	0	0
Difference in tax rates applicable to non-U.S. earnings	1	0	0
Repayment of claim of right income	0	2	14
Valuation allowances	(5)	0	0
Other	14	(2)	1
Total provision for income taxes	$ 264	$ 154	$ 126
Percentage of Pretax Income
Federal income taxes and rate	21.00%	21.00%	21.00%
State and local income taxes, net of federal income tax benefit	3.90%	2.20%	2.20%
Non-taxable bargain purchase gain	(7.70%)	0.00%	0.00%
Domestic tax credits	(1.50%)	(0.70%)	(0.90%)
Effect of BOLI surrender	3.50%	0.00%	0.00%
Deferred tax liability adjustment	(0.60%)	0.00%	0.00%
Difference in tax rates applicable to non-U.S. earnings	0.10%	0.00%	0.00%
Repayment of claim of right income	0.00%	(0.30%)	(2.20%)
Valuation allowances	(0.40%)	0.00%	0.00%
Other	1.10%	(0.20%)	0.30%
Provision for income taxes and effective tax rate	19.40%	22.00%	20.40%