Earnings Per Share, Share Repurchases and Dividends on Common Stock (Unaudited) Share Repurchases (Details 2) - USD ($) $ / shares in Units, shares in Millions, $ in Millions			2 Months Ended	3 Months Ended		14 Months Ended	35 Months Ended
	Nov. 02, 2021	Feb. 01, 2021	Mar. 31, 2022	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Oct. 31, 2021	Feb. 01, 2022	Jan. 24, 2022	Jun. 01, 2021	Jan. 25, 2021	Dec. 04, 2018
Share Repurchases - Notes to Table
Amount remaining under authorization for share repurchases			$ 3,800	$ 3,800		$ 3,800
Accelerated Share Repurchase	$ 500	$ 2,000
Accelerated Share Repurchases, Payment	$ 500	$ 2,000
accelerated share repurchase initial receipt shares	1.2	5.9
Accelerated Share Repurchase Initial Receipt Monetary	$ 425	$ 1,700
Accelerated Share Repurchase Remaining Amount								$ 75		$ 300
Accelerated Share Repurchase Final Delivery Possible Settlement Shares								0.1		0.2
Accelerated Share Repurchase Share Price								$ 374.79		$ 327.29
December 2018 Share Repurchase Original Authorization [Member]
Share Repurchase [Line Items]
Amount Authorized												$ 3,000
Shares Retired							8.9
Average Cost Per Share							$ 337.18
Shares Repurchased				0.0	5.9
January 2021 Share Repurchase Program
Share Repurchase [Line Items]
Amount Authorized											$ 3,000
Shares Retired						3.1
Average Cost Per Share						$ 379.06
Shares Repurchased				0.9	0.0
Share Repurchases - Notes to Table
Shares repurchased amount						$ 1,200
Amount remaining under authorization for share repurchases			$ 1,800	$ 1,800		$ 1,800
January 2022 Share Repurchase Program
Share Repurchase [Line Items]
Amount Authorized									$ 2,000
Shares Retired			0.0
Average Cost Per Share			$ 0
Shares Repurchased				0.0	0.0