Contingencies (Antitrust Litigation and Shareholder Class Action and Shareholder Derivative Lawsuits) (Details) $ in Millions	1 Months Ended				12 Months Ended
	May 31, 2023 USD ($)	Apr. 30, 2023 USD ($)	Mar. 31, 2022 USD ($)	Jan. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Apr. 22, 2024 lawsuit	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Nov. 30, 2020 complaint	Apr. 30, 2020
Loss Contingencies [Line Items]
Loss contingency, number of complaints | complaint											3
Litigation settlement			$ 90
Loss contingency accrual, provision						$ 90
Payments for legal settlements				$ 90
Pre-tax charge					$ 71			$ 364	$ 346	$ 171
Subsequent Event [Member]
Loss Contingencies [Line Items]
Loss contingency, class action lawsuit | lawsuit							17
Federal And State Shareholder Derivative Lawsuits [Member]
Loss Contingencies [Line Items]
Loss contingency accrual, provision					$ 27
Loss contingency, settlement funding amount	$ 100
Judgments paid		$ 15
Pre-tax charge										$ 100
Loss contingency, settlement funding period	5 years
JUUL [Member]
Loss Contingencies [Line Items]
Equity securities, ownership percentage												35.00%