Comprehensive Income and Shareholders' Equity (Details) - USD ($) shares in Millions, $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 40,855	$ 34,517	$ 29,684	$ 27,594
Other comprehensive items before reclassifications		409
Amounts reclassified from accumulated other comprehensive items		69
Total other comprehensive items		478	(128)	(180)
Balance		40,855	34,517	29,684
Payments for Repurchase of Common Stock		$ 2,000	1,500	1,500
Class of Stock Disclosures [Abstract]
Common Stock, Capital Shares Reserved for Future Issuance (in shares)		23.0
Subsequent Event [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Payments for Repurchase of Common Stock	$ 2,000
Purchases of company common stock (in shares)	3.3
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (2,065)	$ (2,438)
Other comprehensive items before reclassifications		373
Total other comprehensive items		373
Balance		(2,065)	(2,438)
Unrealized Losses on Hedging Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(35)	(91)
Amounts reclassified from accumulated other comprehensive items		56
Total other comprehensive items		56
Balance		(35)	(91)
Pension and Other Postretirement Benefit Liability Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(229)	(278)
Other comprehensive items before reclassifications		36
Amounts reclassified from accumulated other comprehensive items		13
Total other comprehensive items		49
Balance		(229)	(278)
Accumulated Other Comprehensive Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ (2,329)	(2,807)	(2,679)	(2,498)
Total other comprehensive items		478	(128)	(181)
Balance		$ (2,329)	$ (2,807)	$ (2,679)