Income Taxes Federal and Foreign Income Tax Expense (Details 1) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes on Continuing Operations (Table Amounts)
Current federal income tax expense (benefit)	$ 246	$ 758	$ 292
Deferred federal income tax expense (benefit)	288	(474)	213
Total federal income tax expense (benefit)	534	284	505
Current foreign income tax expense (benefit)	3	10	7
Deferred foreign income tax expense (benefit)	2	6	1
Total foreign income tax expense (benefit)	5	16	8
Total federal and foreign income tax expense	$ 539	$ 300	$ 513