Income Taxes (Components Of Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current tax expense:
Federal	$ 1,731	$ 1,019	$ 1,128
State and local	461	84	78
Total current tax expense	2,192	1,103	1,206
Deferred tax (benefit) expense	(526)	75	112
Total income tax expense	$ 1,666	$ 1,178	$ 1,318