Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income	$ 7,725	$ 6,375	$ 3,696
Basic Weighted Average Shares	394	396	400
Effect of Stock Options and Restricted Stock Units	3	3	3
Diluted Weighted Average Shares	397	399	403
Basic Earnings Per Share (in dollars per share)	$ 19.62	$ 16.09	$ 9.24
Diluted Earnings Per Share (in dollars per share)	$ 19.46	$ 15.96	$ 9.17
Antidilutive stock options excluded from diluted weighted average shares	1	1	1