Earnings Per Share, Share Repurchases and Dividends on Common Stock (Details 2) - USD ($) $ / shares in Units, shares in Millions			1 Months Ended				12 Months Ended
	Nov. 02, 2021	Feb. 01, 2021	May 31, 2021	May 31, 2020	May 31, 2019	May 31, 2018	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jun. 01, 2021
Earnings Per Share, Basic and Diluted [Abstract]
Dilutive effect of stock options and other stock awards granted							0.6	0.5	0.7
Increase (Decrease) in Stock Dividend, Percentage			8.00%	10.00%	10.00%
Common stock dividend (in dollars per share)			$ 1.57	$ 1.45	$ 1.32	$ 1.20	$ 6.16	$ 5.67	$ 5.16
Accelerated Share Repurchase	$ 500,000,000	$ 2,000,000,000
Accelerated Share Repurchases, Payment	$ 500,000,000	$ 2,000,000,000
Accelerated Share Repurchase Initial Receipt of Shares	1.2	5.9
Accelerated Share Repurchase Initial Receipt Monetary	$ 425,000,000	$ 1,700,000,000
Accelerated Share Repurchase Remaining Amount							$ 75,000,000			$ 300,000,000
Accelerated Share Repurchase Final Delivery Possible Settlement Shares										0.2
Accelerated Share Repurchase Share Price										$ 327.29