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, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax expense at statutory rates	$ (312)	$ (172)	$ (257)
Tax benefit from tax exempt income	51	52	53
Foreign taxes and credits	(3)	2	(1)
State income tax expense	(13)	(6)	(14)
Other tax expense	(5)	(7)	(4)
Income tax expense	$ (282)	$ (131)	$ (223)