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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Oct. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Taxes [Line Items] |  |  |  |  |
Unrecognized tax benefits if recognized would impact effective tax rate |  | $ 189 | $ 35 |  |
Unrecognized tax benefits if recognized would affect deferred taxes |  | 27 | 1,573 |  |
Additions based on tax positions related to the current year |  | 0 | 1,548 | $ 1 |
Indirect deferred income tax expense (benefit) |  |  | (428) |  |
Ordinary loss |  |  | 4,000 |  |
Capital loss |  |  | 2,400 |  |
Income tax expense (benefit) |  | 2,394 | 2,798 | 1,625 |
Increase (decrease) in other noncurrent liabilities |  | 1,120 |  |  |
Penalties and interest accrued |  | 18 | 36 | 18 |
Interest (income) expense associated with uncertain tax position |  | (24) | 20 | 8 |
Potential decrease in liability for uncertain tax positions |  | 1 |  |  |
Valuation reversal, amount |  | 939 | 0 | 664 |
State and local income taxes, net of federal tax benefit |  | 557 | 463 | 435 |
Capital loss carryforwards | $ 1,000 |  |  |  |
Capital losses not yet recognized | 5,700 | 5,700 |  |  |
Deferred tax assets, valuation allowance |  | 668 | 2,256 | 2,800 | $ 3,097
IQOS [Member] |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Capital loss | 1,700 |  |  |  |
Deferred Tax Assets, Domestic Subsidiary Shares [Member] |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Deferred tax assets, valuation allowance |  |  | 1,808 |  |
State and Local Jurisdiction [Member] |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Net operating losses carry forward |  | 1,066 |  |  |
Foreign Tax Jurisdiction [Member] |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Net operating losses carry forward |  | 38 |  |  |
Capital losses not yet recognized | 1,200 |  |  |  |
Domestic Tax Jurisdiction [Member] |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Net operating losses carry forward |  | 374 |  |  |
Capital losses not yet recognized | 3,500 |  |  |  |
JUUL [Member] |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Equity securities, FV-NI, ordinary loss, tax basis of investments | 6,400 |  |  |  |
Ordinary loss |  | 4,000 |  |  |
Capital loss | $ 12,800 |  |  |  |
Income tax expense (benefit) |  | 887 |  |  |
Investment |  | 0 | 53 | 306 |
State and local income taxes, net of federal tax benefit |  | 557 |  |  |
Capital loss carryforwards |  | 1,000 |  |  |
Deferred tax assets, valuation allowance |  | 207 |  | 2,394 |
Cronos Group Inc. [Member] |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Investment |  | 3 | 11 | 30 |
Deferred tax assets, valuation allowance |  | $ 402 | $ 397 | $ 379 |

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