Income Taxes: (Details) $ in Millions, Rp in Trillions	3 Months Ended		9 Months Ended			12 Months Ended
Income Taxes: (Details) $ in Millions, Rp in Trillions	Sep. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2026 USD ($)	Sep. 30, 2026 IDR (Rp)	Sep. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Income Taxes [Line Items]
Effective tax rate	21.50%	18.70%	20.90%	20.90%	19.20%
Income tax expense (benefit)	$ 986	$ 751	$ 2,617		$ 2,062
Other tax expense (benefit)			95		143
Amount assessed by taxing authorities			199	Rp 3.6
Valuation Allowance U.S. Foreign Tax Credits
Income Taxes [Line Items]
Income tax expense (benefit)					50
RBH Plan Implementation
Income Taxes [Line Items]
Income tax expense (benefit)					166
Global Intangible Low Taxed Income
Income Taxes [Line Items]
Income tax expense (benefit)						$ (174)
Indonesia
Income Taxes [Line Items]
Other tax expense (benefit)					46
GERMANY
Income Taxes [Line Items]
Income tax expense (benefit)					(89)
Swedish Match AB
Income Taxes [Line Items]
Income tax expense (benefit)			$ (111)		$ (369)
Minimum
Income Taxes [Line Items]
Statute of limitations term			3 years	3 years
Maximum
Income Taxes [Line Items]
Statute of limitations term			5 years	5 years