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Income Taxes, Reconciliation of Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Effective Income Tax Rate Reconciliation, Amount |  |  |  |
Income tax expense (benefit) at statutory rates |  | $ 2,409 | $ 3,071 | $ 288
U.S. state and Canadian provincial tax expense, net of federal income tax effect |  | 275 | 437 | 69
Permanent differences |  | (105) | (77) | (48)
Changes in tax law | [1] |  |  | 64
CARES Act | [2] |  |  | (56)
GILTI tax |  | 167 | 413 | 125
Foreign tax credits |  | (149) | (396) | (103)
Repatriation withholding tax |  | 45 | 51 |
Settlements |  |  |  | (22)
Tax effects of income associated with noncontrolling interests |  | (54) | (53) | (44)
Other, net |  | 31 | (18) | (18)
Income tax expense |  | $ 2,619 | $ 3,428 | $ 255
Effective Income Tax Rate Reconciliation, Percent |  |  |  |
Income tax expense (benefit) at statutory rates (percent) |  | 20.50% | 20.10% | 18.70%
U.S. state and Canadian provincial tax expense (benefit), net of federal income tax effect (percent) |  | 2.30% | 2.80% | 4.50%
Permanent differences (percent) |  | (0.90%) | (0.50%) | (3.10%)
Change in tax law (percent) | [1] |  |  | 4.10%
CARES Act (percent) | [2] |  |  | (3.60%)
GILTI tax (percent) |  | 1.40% | 2.70% | 8.10%
Foreign tax credits (percent) |  | (1.30%) | (2.60%) | (6.70%)
Repatriation withholding tax (percent) |  | 0.40% | 0.30% |
Settlements (percent) |  |  |  | (1.40%)
Tax effects of income associated with noncontrolling interests (percent) |  | (0.40%) | (0.30%) | (2.90%)
Other, net (percent) |  | 0.30% | (0.10%) | (1.20%)
Income tax expense (percent) |  | 22.30% | 22.40% | 16.50%
U.S. [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Amount |  |  |  |
Income tax expense (benefit) at statutory rates |  | $ 1,960 | $ 2,460 | $ 215
U.S. state and Canadian provincial tax expense, net of federal income tax effect |  | 114 | 182 | 16
Permanent differences |  | (87) | (61) | (34)
Changes in tax law | [1] |  |  | (10)
CARES Act | [2] |  |  | (56)
GILTI tax |  | 167 | 413 | 125
Foreign tax credits |  | (149) | (396) | (103)
Repatriation withholding tax |  | 45 | 51 |
Settlements |  |  |  | (22)
Tax effects of income associated with noncontrolling interests |  | (84) | (78) | (74)
Other, net |  | 8 | (27) | (7)
Income tax expense |  | $ 1,974 | $ 2,544 | $ 50
Effective Income Tax Rate Reconciliation, Percent |  |  |  |
Income tax expense (benefit) at statutory rates (percent) |  | 21.00% | 21.00% | 21.00%
U.S. state and Canadian provincial tax expense (benefit), net of federal income tax effect (percent) |  | 1.20% | 1.60% | 1.60%
Permanent differences (percent) |  | (0.90%) | (0.50%) | (3.30%)
Change in tax law (percent) | [1] |  |  | (1.00%)
CARES Act (percent) | [2] |  |  | (5.50%)
GILTI tax (percent) |  | 1.80% | 3.50% | 12.20%
Foreign tax credits (percent) |  | (1.60%) | (3.40%) | (10.10%)
Repatriation withholding tax (percent) |  | 0.50% | 0.40% |
Settlements (percent) |  |  |  | (2.10%)
Tax effects of income associated with noncontrolling interests (percent) |  | (0.90%) | (0.70%) | (7.20%)
Other, net (percent) |  | 0.00% | (0.20%) | (0.70%)
Income tax expense (percent) |  | 21.10% | 21.70% | 4.90%
Foreign [Member] |  |  |  |
Effective Income Tax Rate Reconciliation, Amount |  |  |  |
Income tax expense (benefit) at statutory rates |  | $ 449 | $ 611 | $ 73
U.S. state and Canadian provincial tax expense, net of federal income tax effect |  | 161 | 255 | 53
Permanent differences |  | (18) | (16) | (14)
Changes in tax law | [1] |  |  | 74
CARES Act | [2] |  |  | 0
GILTI tax |  | 0 | 0 | 0
Foreign tax credits |  | 0 | 0 | 0
Repatriation withholding tax |  | 0 | 0 |
Settlements |  |  |  | 0
Tax effects of income associated with noncontrolling interests |  | 30 | 25 | 30
Other, net |  | 23 | 9 | (11)
Income tax expense |  | $ 645 | $ 884 | $ 205
Effective Income Tax Rate Reconciliation, Percent |  |  |  |
Income tax expense (benefit) at statutory rates (percent) |  | 18.50% | 17.00% | 14.00%
U.S. state and Canadian provincial tax expense (benefit), net of federal income tax effect (percent) |  | 6.60% | 7.10% | 10.20%
Permanent differences (percent) |  | (0.70%) | (0.50%) | (2.70%)
Change in tax law (percent) | [1] |  |  | 14.20%
CARES Act (percent) | [2] |  |  | 0.00%
GILTI tax (percent) |  | 0.00% | 0.00% | 0.00%
Foreign tax credits (percent) |  | 0.00% | 0.00% | 0.00%
Repatriation withholding tax (percent) |  | 0.00% | 0.00% |
Settlements (percent) |  |  |  | 0.00%
Tax effects of income associated with noncontrolling interests (percent) |  | 1.20% | 0.70% | 5.80%
Other, net (percent) |  | 0.90% | 0.30% | (2.10%)
Income tax expense (percent) |  | 26.50% | 24.60% | 39.40%
[1] | During the three months ended June 30, 2021, certain statutory income tax rate changes (primarily an increase in the U.K. rate from 19 percent to 25 percent effective in 2023) were enacted that resulted in the remeasurement of our deferred tax liabilities and related deferred income tax expense.
[2] | Upon filing our superseding 2020 federal income tax return in the fourth quarter of 2021, we recorded an additional tax benefit during the year ended December 31, 2021 related to the additional 2020 tax net operating loss (NOL) carryback to 2015, as permitted by the Coronavirus Aid, Relief and Economic Security (CARES) Act enacted on March 27, 2020.

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax settlements. Including, but not limited to, domestic tax settlement, foreign tax settlement, state and local tax settlement, and other tax settlements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482685/740-10-50-12 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the expected tax NOL carryback provided for under the CARES Act. + References No definition available. + Details
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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the expected tax NOL carryback provided for under the CARES Act. + References No definition available. + Details
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