Acquisition of NJOY - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions			3 Months Ended
	Mar. 31, 2024	Jun. 01, 2023	Mar. 31, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Goodwill	$ 6,945		$ 6,945	$ 6,791
NJOY Holdings, Inc. [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	22	$ 22	22
Receivables	7	7	7
Inventories	19	19	19
Other assets	7	7	7
Property, plant and equipment	16	16	16
Accounts payable	(7)	(7)	(7)
Accrued liabilities	(20)	(20)	(20)
Deferred income taxes	(101)	(167)	(101)
Measurement Period Adjustments, Deferred Income Taxes			66
Total identifiable net assets	1,133	1,287	1,133
Measurement Period Adjustments, Net Assets			(154)
Total consideration	2,901	2,901
Measurement Period Adjustments, Consideration Transferred			0
Goodwill	1,768	1,614	1,768
Goodwill, purchase accounting adjustments			154
Developed Technology Rights [Member] | NJOY Holdings, Inc. [Member]
Business Acquisition [Line Items]
Other intangible assets	1,000	1,000	1,000
Trademarks | NJOY Holdings, Inc. [Member]
Business Acquisition [Line Items]
Other intangible assets	190	230	190
Measurement Period Adjustments, Intangibles			(40)
Supplier Agreements [Member] | NJOY Holdings, Inc. [Member]
Business Acquisition [Line Items]
Other intangible assets	$ 0	$ 180	0
Measurement Period Adjustments, Intangibles			$ (180)