Segment Reporting: (Net Revenues, Significant Expenses, and Operating Income by Segment) (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Net revenues	[1],[2]			$ 40,648	$ 37,878	$ 35,174
Less:
Cost of sales				13,366	13,329	12,893
Marketing, administration and research costs				12,349	11,147	10,060
Impairment of goodwill		$ 41	$ 0	41	0	665
Operating income				14,892	13,402	11,556
Europe
Segment Reporting Information [Line Items]
Net revenues				17,111	15,690	14,537
Less:
Cost of sales				4,501	4,474	4,321
Marketing, administration and research costs				5,404	4,669	4,252
Impairment of goodwill				41		665
Operating income				7,165	6,547	5,299
SSEA, CIS & MEA
Segment Reporting Information [Line Items]
Net revenues				12,051	11,261	10,629
Less:
Cost of sales				5,190	5,313	5,109
Marketing, administration and research costs				2,765	2,519	2,384
Impairment of goodwill				0		0
Operating income				4,096	3,429	3,136
EA, AU & PMI GTR
Segment Reporting Information [Line Items]
Net revenues				6,632	6,393	6,201
Less:
Cost of sales				1,961	2,011	1,978
Marketing, administration and research costs				1,545	1,504	1,684
Impairment of goodwill				0		0
Operating income				3,126	2,878	2,539
Americas
Segment Reporting Information [Line Items]
Net revenues				4,854	4,534	3,807
Less:
Cost of sales				1,714	1,531	1,485
Marketing, administration and research costs				2,635	2,455	1,740
Impairment of goodwill				0		0
Operating income				$ 505	$ 548	$ 582

[1] Includes net revenues from related parties of $4,582 million, $3,876 million and $3,553 million for the years ended December 31, 2025, 2024 and 2023, respectively

[2] Net revenues are shown net of excise tax on products. For the years ended December 31, 2025, 2024 and 2023, excise tax on products was $53,211 million, $51,563 million and $49,404 million, respectively