Income Taxes: (Narrative) (Details) $ in Millions, Rp in Trillions	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2025 IDR (Rp)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Income Taxes [Line Items]
Income tax assessment	$ 269	Rp 4.5
Unrecognized tax benefits that, if recognized, would impact effective tax rate	108
Income tax penalties and interest income (expense) recognized	$ (14)		$ (2)	$ 5
Percentage increase (decrease) in effective income tax rate	5.00%	5.00%	2.30%
Income tax expense (benefit)	$ 2,737		$ 3,017	$ 2,339
Other tax expense	$ 81
Effective income tax rate	19.70%	19.70%	24.70%	22.40%
Net operating loss carryforwards	$ 1,542		$ 912
Net operating loss carryforwards with unlimited period	961		381
Valuation allowances	1,709		1,130
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)
Germany
Income Taxes [Line Items]
Income tax expense (benefit)	(89)
Indonesia
Income Taxes [Line Items]
Income tax expense (benefit)	39
Swedish Match AB
Income Taxes [Line Items]
Income tax expense (benefit)	$ (384)
Minimum
Income Taxes [Line Items]
Foreign and U.S. state jurisdictions have statutes of limitations	3 years	3 years
Maximum
Income Taxes [Line Items]
Foreign and U.S. state jurisdictions have statutes of limitations	5 years	5 years