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Loans Payable, Long-Term Debt and Leases - Long-Term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-Term Debt	$ 30,690	$ 25,360
2.75% notes due 2025
Debt Instrument [Line Items]
Stated interest rate	2.75%
Long-Term Debt	$ 2,495	2,493
2.15% notes due 2031
Debt Instrument [Line Items]
Stated interest rate	2.15%
Long-Term Debt	$ 1,986	0
2.75% notes due 2051
Debt Instrument [Line Items]
Stated interest rate	2.75%
Long-Term Debt	$ 1,979	0
3.70% notes due 2045
Debt Instrument [Line Items]
Stated interest rate	3.70%
Long-Term Debt	$ 1,977	1,976
2.80% notes due 2023
Debt Instrument [Line Items]
Stated interest rate	2.80%
Long-Term Debt	$ 1,749	1,748
3.40% notes due 2029
Debt Instrument [Line Items]
Stated interest rate	3.40%
Long-Term Debt	$ 1,736	1,734
1.70% notes due 2027
Debt Instrument [Line Items]
Stated interest rate	1.70%
Long-Term Debt	$ 1,493	0
2.90% notes due 2061
Debt Instrument [Line Items]
Stated interest rate	2.90%
Long-Term Debt	$ 1,484	0
4.00% notes due 2049
Debt Instrument [Line Items]
Stated interest rate	4.00%
Long-Term Debt	$ 1,470	1,469
4.15% notes due 2043
Debt Instrument [Line Items]
Stated interest rate	4.15%
Long-Term Debt	$ 1,239	1,238
1.45% notes due 2030
Debt Instrument [Line Items]
Stated interest rate	1.45%
Long-Term Debt	$ 1,235	1,233
2.45% notes due 2050
Debt Instrument [Line Items]
Stated interest rate	2.45%
Long-Term Debt	$ 1,212	1,211
1.875% euro-denominated notes due 2026
Debt Instrument [Line Items]
Stated interest rate	1.875%
Long-Term Debt	$ 1,123	1,218
1.90% notes due 2028
Debt Instrument [Line Items]
Stated interest rate	1.90%
Long-Term Debt	$ 994	0
0.75% notes due 2026
Debt Instrument [Line Items]
Stated interest rate	0.75%
Long-Term Debt	$ 993	991
3.90% notes due 2039
Debt Instrument [Line Items]
Stated interest rate	3.90%
Long-Term Debt	$ 984	983
2.35% notes due 2040
Debt Instrument [Line Items]
Stated interest rate	2.35%
Long-Term Debt	$ 983	982
2.90% notes due 2024
Debt Instrument [Line Items]
Stated interest rate	2.90%
Long-Term Debt	$ 748	746
6.50% notes due 2033
Debt Instrument [Line Items]
Stated interest rate	6.50%
Long-Term Debt	$ 715	719
0.50% euro-denominated notes due 2024
Debt Instrument [Line Items]
Stated interest rate	0.50%
Long-Term Debt	$ 563	611
1.375% euro-denominated notes due 2036
Debt Instrument [Line Items]
Stated interest rate	1.375%
Long-Term Debt	$ 559	606
2.50% euro-denominated notes due 2034
Debt Instrument [Line Items]
Stated interest rate	2.50%
Long-Term Debt	$ 558	605
3.60% notes due 2042
Debt Instrument [Line Items]
Stated interest rate	3.60%
Long-Term Debt	$ 491	491
6.55% notes due 2037
Debt Instrument [Line Items]
Stated interest rate	6.55%
Long-Term Debt	$ 409	411
5.75% notes due 2036
Debt Instrument [Line Items]
Stated interest rate	5.75%
Long-Term Debt	$ 338	338
5.95% debentures due 2028
Debt Instrument [Line Items]
Stated interest rate	5.95%
Long-Term Debt	$ 306	306
5.85% notes due 2039
Debt Instrument [Line Items]
Stated interest rate	5.85%
Long-Term Debt	$ 271	271
6.40% debentures due 2028
Debt Instrument [Line Items]
Stated interest rate	6.40%
Long-Term Debt	$ 250	250
6.30% debentures due 2026
Debt Instrument [Line Items]
Stated interest rate	6.30%
Long-Term Debt	$ 135	135
2.35% notes due 2022
Debt Instrument [Line Items]
Stated interest rate	2.35%
Long-Term Debt	$ 0	1,269
2.40% notes due 2022
Debt Instrument [Line Items]
Stated interest rate	2.40%
Long-Term Debt	$ 0	1,032
Other
Debt Instrument [Line Items]
Long-Term Debt	$ 215	$ 294

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Contractual interest rate for funds borrowed, under the debt agreement.

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