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