Income Taxes (Reconciliation between the Company's federal income tax (expense) benefit at statutory rates and the recorded income tax (expense) benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income tax expense at statutory rates	$ (227)	$ (312)	$ (172)
Tax benefit from tax exempt income	41	51	52
Foreign taxes and credits	15	(3)	2
State income tax expense	(10)	(13)	(6)
Other tax expense	(6)	(5)	(7)
Income tax expense	$ (187)	$ (282)	$ (131)