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Debt and Credit Facilities - Summary of Debt Carrying Amount (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Debt Instrument [Line Items] |  |
Total | $ 26,695 | $ 31,402
Less: current portion of long-term debt and other obligations, net | 1,516 | 2,757
Total long-term debt, net | 25,179 | 28,645
Senior Notes And Medium-Term Notes |  |
Debt Instrument [Line Items] |  |
Total | 25,571 | 30,295
Senior notes |  |
Debt Instrument [Line Items] |  |
Total | $ 25,750 |
Senior notes | 4.50% Senior Unsecured Notes Due in April 2021 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.50% |
Total | $ 0 | 1,000
Senior notes | 0.15% LIBOR Senior Unsecured Notes Due September 2021 |  |
Debt Instrument [Line Items] |  |
Total | $ 0 | 499
Senior notes | 4.40% Senior Unsecured Notes Due In December 2021 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.40% |
Total | $ 0 | 1,249
Senior notes | 1.95% Senior Unsecured Notes Due in March 2022 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 1.95% |
Total | $ 500 | 499
Senior notes | 3.25% Senior Unsecured Notes Due in September 2022 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 3.25% |
Total | $ 999 | 998
Senior notes | 2.50% Senior Unsecured Notes Due in September 2023 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 2.50% |
Total | $ 748 | 748
Senior notes | 0.52% LIBOR Senior Unsecured Notes Due September 2023 |  |
Debt Instrument [Line Items] |  |
Total | $ 0 | 498
Senior notes | 0.75% Senior Unsecured Notes Due in September 2023 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 0.75% |
Total | $ 1,496 | 1,992
Senior notes | 3.70% Senior Unsecured Notes Due in April 2024 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 3.70% |
Total | $ 1,747 | 1,746
Senior notes | 3.50% Senior Unsecured Notes Due in February 2025 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 3.50% |
Total | $ 1,747 | 1,746
Senior notes | 3.65% Senior Unsecured Notes Due in March 2026 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 3.65% |
Total | $ 2,739 | 2,737
Senior notes | 2.95% Senior Unsecured Notes Due in March 2027 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 2.95% |
Total | $ 1,247 | 1,246
Senior notes | 1.20% Senior Unsecured Notes Due October 2027 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 1.20% |
Total | $ 746 | 745
Senior notes | 1.65% Senior Unsecured Notes Due October 2030 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 1.65% |
Total | $ 993 | 992
Senior notes | 4.60% Senior Unsecured Notes Due in September 2035 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.60% |
Total | $ 992 | 991
Senior notes | 4.00% Senior Unsecured Notes Due in September 2036 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.00% |
Total | $ 742 | 741
Senior notes | 2.60% Senior Unsecured Notes Due October 2040 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 2.60% |
Total | $ 987 | 986
Senior notes | 5.65% Senior Unsecured Notes Due in December 2041 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 5.65% |
Total | $ 996 | 996
Senior notes | 4.80% Senior Unsecured Notes Due in April 2044 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.80% |
Total | $ 1,736 | 1,735
Senior notes | 4.50% Senior Unsecured Notes Due in February 2045 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.50% |
Total | $ 1,733 | 1,732
Senior notes | 4.75% Senior Unsecured Notes Due in March 2046 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.75% |
Total | $ 2,220 | 2,219
Senior notes | 4.15% Senior Unsecured Notes Due in March 2047 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 4.15% |
Total | $ 1,727 | 1,726
Senior notes | 2.80% Senior Unsecured Notes Due October 2050 |  |
Debt Instrument [Line Items] |  |
Interest Rate | 2.80% |
Total | $ 1,476 | 1,476
Medium-term notes | Variable Term Loan Note Due October 2023 |  |
Debt Instrument [Line Items] |  |
Total | 0 | 998
Other notes payable |  |
Debt Instrument [Line Items] |  |
Total | $ 1,124 | $ 1,107
LIBOR rate | Senior notes | 0.15% LIBOR Senior Unsecured Notes Due September 2021 |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 0.15% |
LIBOR rate | Senior notes | 0.52% LIBOR Senior Unsecured Notes Due September 2023 |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 0.52% |

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