Financing (Components of Debt) (Details) € in Millions, SFr in Millions, $ in Millions, ¥ in Billions	Apr. 01, 2022 USD ($)	Apr. 01, 2022 EUR (€)	Apr. 01, 2022 CHF (SFr)	Apr. 01, 2022 JPY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2021 CHF (SFr)	Dec. 31, 2021 JPY (¥)
Debt Instrument [Line Items]
Total debt	$ 21,778				$ 22,176
Less: currently payable	(10)				(8)
Long-term debt	21,768				22,168
Other
Debt Instrument [Line Items]
Total debt	24				25
Commercial paper | U.S. dollar-denominated commercial paper
Debt Instrument [Line Items]
Total debt	1,450				1,440
Commercial paper | Euro-denominated commercial paper
Debt Instrument [Line Items]
Total debt	1,326	€ 1,200			1,366	€ 1,200
Senior notes | Floating rate senior notes due 2022
Debt Instrument [Line Items]
Total debt	276				284
Aggregate principal amount | €		€ 250				€ 250
Senior notes | 2.05% senior notes due 2022
Debt Instrument [Line Items]
Total debt	$ 699				$ 699
Interest rate of debt instrument	2.05%	2.05%	2.05%	2.05%	2.05%	2.05%	2.05%	2.05%
Senior notes | 1.7% senior notes due 2024
Debt Instrument [Line Items]
Total debt	$ 992				$ 1,021
Interest rate of debt instrument	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%	1.70%
Aggregate principal amount | €		€ 900				€ 900
Senior notes | 2.2% senior notes due 2024
Debt Instrument [Line Items]
Total debt	$ 698				$ 698
Interest rate of debt instrument	2.20%	2.20%	2.20%	2.20%	2.20%	2.20%	2.20%	2.20%
Senior notes | 3.35% senior notes due 2025
Debt Instrument [Line Items]
Total debt	$ 498				$ 498
Interest rate of debt instrument	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%	3.35%
Senior notes | 0.2% senior notes due 2026
Debt Instrument [Line Items]
Total debt	$ 1,375				$ 1,416
Interest rate of debt instrument	0.20%	0.20%	0.20%	0.20%	0.20%	0.20%	0.20%	0.20%
Aggregate principal amount | €		€ 1,300				€ 1,300
Senior notes | 2.1% senior notes due 2026
Debt Instrument [Line Items]
Total debt	$ 881				$ 907
Interest rate of debt instrument	2.10%	2.10%	2.10%	2.10%	2.10%	2.10%	2.10%	2.10%
Aggregate principal amount | €		€ 800				€ 800
Senior notes | 0.3% senior notes due 2027
Debt Instrument [Line Items]
Total debt	$ 251				$ 267
Interest rate of debt instrument	0.30%	0.30%	0.30%	0.30%	0.30%	0.30%	0.30%	0.30%
Aggregate principal amount | ¥				¥ 30.8				¥ 30.8
Senior notes | 1.2% senior notes due 2027
Debt Instrument [Line Items]
Total debt	$ 661				$ 680
Interest rate of debt instrument	1.20%	1.20%	1.20%	1.20%	1.20%	1.20%	1.20%	1.20%
Aggregate principal amount | €		€ 600				€ 600
Senior notes | 0.45% senior notes due 2028
Debt Instrument [Line Items]
Total debt	$ 1,373				$ 1,413
Interest rate of debt instrument	0.45%	0.45%	0.45%	0.45%	0.45%	0.45%	0.45%	0.45%
Aggregate principal amount | €		€ 1,300				€ 1,300
Senior notes | 2.6% senior notes due 2029
Debt Instrument [Line Items]
Total debt	$ 795				$ 795
Interest rate of debt instrument	2.60%	2.60%	2.60%	2.60%	2.60%	2.60%	2.60%	2.60%
Senior notes | 2.5% senior notes due 2030
Debt Instrument [Line Items]
Total debt	$ 884				$ 910
Interest rate of debt instrument	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%	2.50%
Aggregate principal amount | €		€ 800				€ 800
Senior notes | 0.75% senior notes due 2031
Debt Instrument [Line Items]
Total debt	$ 1,922				$ 1,980
Interest rate of debt instrument	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Aggregate principal amount | €		€ 1,800				€ 1,800
Senior notes | 0.65% senior notes due 2032
Debt Instrument [Line Items]
Total debt	$ 433				$ 461
Interest rate of debt instrument	0.65%	0.65%	0.65%	0.65%	0.65%	0.65%	0.65%	0.65%
Aggregate principal amount | ¥				¥ 53.2				¥ 53.2
Senior notes | 1.35% senior notes due 2039
Debt Instrument [Line Items]
Total debt	$ 1,365				$ 1,406
Interest rate of debt instrument	1.35%	1.35%	1.35%	1.35%	1.35%	1.35%	1.35%	1.35%
Aggregate principal amount | €		€ 1,300				€ 1,300
Senior notes | 3.25% senior notes due 2039
Debt Instrument [Line Items]
Total debt	$ 890				$ 890
Interest rate of debt instrument	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%	3.25%
Senior notes | 4.375% senior notes due 2045
Debt Instrument [Line Items]
Total debt	$ 499				$ 499
Interest rate of debt instrument	4.375%	4.375%	4.375%	4.375%	4.375%	4.375%	4.375%	4.375%
Senior notes | 1.8% senior notes due 2049
Debt Instrument [Line Items]
Total debt	$ 819				$ 844
Interest rate of debt instrument	1.80%	1.80%	1.80%	1.80%	1.80%	1.80%	1.80%	1.80%
Aggregate principal amount | €		€ 750				€ 750
Senior notes | 3.4% senior notes due 2049
Debt Instrument [Line Items]
Total debt	$ 889				$ 889
Interest rate of debt instrument	3.40%	3.40%	3.40%	3.40%	3.40%	3.40%	3.40%	3.40%
Senior notes | 2.6% senior notes due 2050
Debt Instrument [Line Items]
Total debt	$ 980				$ 980
Interest rate of debt instrument	2.60%	2.60%	2.60%	2.60%	2.60%	2.60%	2.60%	2.60%
Senior notes | 2.8% senior unsecured notes due 2051
Debt Instrument [Line Items]
Total debt	$ 984				$ 983
Interest rate of debt instrument	2.80%	2.80%	2.80%	2.80%	2.80%	2.80%	2.80%	2.80%
Bonds | 0.5% senior bonds due 2023
Debt Instrument [Line Items]
Total debt	$ 584				$ 592
Interest rate of debt instrument	0.50%	0.50%	0.50%	0.50%	0.50%	0.50%	0.50%	0.50%
Aggregate principal amount | SFr			SFr 540				SFr 540
Bonds | 1.125% senior bonds due 2028
Debt Instrument [Line Items]
Total debt	$ 230				$ 233
Interest rate of debt instrument	1.125%	1.125%	1.125%	1.125%	1.125%	1.125%	1.125%	1.125%
Aggregate principal amount | SFr			SFr 210				SFr 210