Contingencies (NPM Adjustment Disputes) (Details) $ in Millions		1 Months Ended			3 Months Ended							9 Months Ended		12 Months Ended		129 Months Ended	321 Months Ended
	Oct. 28, 2024	Aug. 31, 2023 USD ($)	Apr. 30, 2023 USD ($)	Jan. 31, 2022 state	Sep. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2024 USD ($) state	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 state
Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Litigation settlement					$ 900			$ 900				$ 2,700	$ 2,800
PM USA [Member] | Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Loss contingency, number of states with settled litigation including New York, subsequent expansion | state																	39
Loss contingency, credits to offset payments																$ 1,370
PM USA [Member] | Health Care Cost Recovery Actions [Member] | Settled Litigation [Member]
Loss Contingencies [Line Items]
Loss contingency, number of states with settled litigation including New York, subsequent expansion | state				36
PM USA [Member] | Health Care Cost Recovery Actions, 2004 NPM Adjustment [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss contingency, credits to offset payments			$ 52
Loss contingency, number of states with concluded hearings | state												9
Loss contingency, number of states not in compliance with escrow statues | state												3
Loss contingency, number of states not settled | state												8
Loss contingency, damages sought, value									$ 8		$ 44
PM USA [Member] | Health Care Cost Recovery Actions, 2005-2007 NPM Adjustment [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss contingency, number of states not settled | state												6
Loss contingency, reduction to cost of sales							$ 14
Litigation settlement interest expense (income)							$ (21)
PM USA [Member] | Health Care Cost Recovery Actions, 2005-2007 NPM Adjustment [Member] | Pending Litigation [Member] | Period One [Member]
Loss Contingencies [Line Items]
Loss contingency, number of states not settled | state												5
Loss contingency, number of states not settled, arbitration period												3 years
PM USA [Member] | Health Care Cost Recovery Actions, 2005-2007 NPM Adjustment [Member] | Pending Litigation [Member] | Period One [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Loss contingency, number of states not settled, arbitration period	3 years
PM USA [Member] | Health Care Cost Recovery Actions, 2005-2007 NPM Adjustment [Member] | Pending Litigation [Member] | Period Two [Member]
Loss Contingencies [Line Items]
Loss contingency, number of states not settled | state												1
Loss contingency, number of states not settled, arbitration period												1 year
Illinois [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Litigation settlement										$ 80
Illinois [Member] | PM USA [Member] | Health Care Cost Recovery Actions, Transition Years 2019-2021 [Member] | Settled Litigation [Member]
Loss Contingencies [Line Items]
Litigation settlement										$ 20
Iowa [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Loss contingency accrual, provision								$ 19
Iowa [Member] | PM USA [Member] | Health Care Cost Recovery Actions, Transition Years 2005-2022 [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Litigation settlement		$ 19
Iowa [Member] | PM USA [Member] | Health Care Cost Recovery Actions, Transition Years 2020-2022 [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Litigation settlement		$ 4
Idaho [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Litigation settlement						$ 8
Idaho [Member] | PM USA [Member] | Health Care Cost Recovery Actions, Transition Years 2005-2022 [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Litigation settlement														$ 8
Idaho [Member] | PM USA [Member] | Health Care Cost Recovery Actions, Transition Years 2021-2023 [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Litigation settlement														$ 2
New York [Member] | PM USA [Member] | Health Care Cost Recovery Actions [Member] | Settled Litigation [Member]
Loss Contingencies [Line Items]
Litigation settlement															$ 572
Massachusetts [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Loss contingency accrual, provision					28
Massachusetts [Member] | PM USA [Member] | Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Loss contingency, credits to offset payments					$ 28