Contingencies (Antitrust Litigation and Shareholder Class Action and Shareholder Derivative Lawsuits) (Details) $ in Millions	1 Months Ended							3 Months Ended	6 Months Ended	7 Months Ended	12 Months Ended
	Apr. 30, 2023 USD ($)	Feb. 28, 2022 claim	Jan. 31, 2022 USD ($)	Apr. 30, 2021 claim	Aug. 31, 2020 shareholder	Dec. 31, 2019 shareholder	Oct. 31, 2019 shareholder	Dec. 31, 2021 USD ($)	Mar. 31, 2021 shareholder	Jan. 31, 2022 contract	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Aug. 31, 2021 shareholder	Apr. 24, 2023 lawsuit	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Nov. 30, 2020 complaint	Apr. 30, 2020
Loss Contingencies [Line Items]
Loss contingency, number of complaints | complaint																	3
Number of plaintiffs | claim		4
Loss contingency, number of shareholders filing class action lawsuits | shareholder					2	2	2
Litigation settlement								$ 90
Loss contingency accrual, provision												$ 90
Payments for legal settlements			$ 90
Loss contingency, number of pending cases consolidated				5						5
Loss contingency, number of shareholders filing derivative lawsuits | shareholder									3				6
Pre-tax charge								$ 91			$ 71	$ 91			$ 171	$ 0
Federal And State Shareholder Derivative Lawsuits [Member]
Loss Contingencies [Line Items]
Loss contingency accrual, provision											$ 27
Pre-tax charge															$ 100
JUUL [Member]
Loss Contingencies [Line Items]
Equity securities, ownership percentage																		35.00%
Subsequent Event [Member]
Loss Contingencies [Line Items]
Loss contingency, class action lawsuit | lawsuit														17
Subsequent Event [Member] | Federal And State Shareholder Derivative Lawsuits [Member]
Loss Contingencies [Line Items]
Judgments paid (approximately)	$ 15