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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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