Income Taxes (Schedule of Earnings Before Income Taxes and Provision for Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
United States	$ 4,239	$ 6,842	$ 266
Outside United States	(415)	48	500
Earnings before income taxes	3,824	6,890	766
Current:
Federal	1,965	2,025	1,686
State and local	542	553	470
Outside United States	2	22	3
Total current provision for income taxes	2,509	2,600	2,159
Deferred:
Federal	(1,190)	(130)	(78)
State and local	30	(34)	(19)
Outside United States	0	0	2
Total deferred provision for income taxes	(1,160)	(164)	(95)	$ (95)
Total provision (benefit) for income taxes	$ 1,349	$ 2,436	$ 2,064