Contingencies (NPM Adjustment Disputes) (Details) $ in Millions	1 Months Ended	3 Months Ended			12 Months Ended
	Mar. 31, 2022 USD ($) state	Mar. 31, 2022 USD ($) state	Dec. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2018 USD ($) state	Dec. 31, 2015 USD ($)
Loss Contingencies [Line Items]
Litigation settlement			$ 90
Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Litigation settlement		$ 900		$ 900
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	37					36
Loss contingency, credits to offset payments						$ 1,150
Litigation settlement, amount expected to be awarded from other party		410
PM USA [Member] | Health Care Cost Recovery Actions [Member] | Settled Litigation [Member]
Loss Contingencies [Line Items]
Loss contingency, number of additional states extended with settled litigation | state						35
PM USA [Member] | Health Care Cost Recovery Actions [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss contingency, number of additional states extended with settled litigation | state						1
PM USA [Member] | Health Care Cost Recovery Actions, 2004 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		$ 388
PM USA [Member] | Health Care Cost Recovery Actions, 2004 NPM Adjustment [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss contingency, number of states with concluded hearings | state		9
Loss contingency, number of states not settled | state		10
Loss contingency, number of states not in compliance with escrow statues | state		2
Loss contingency, number of states in compliance with escrow statues | state		7
Loss contingency, damages sought, value		$ 23
PM USA [Member] | Health Care Cost Recovery Actions, 2004 NPM Adjustment [Member] | Pending Litigation [Member] | Cost of Sales [Member]
Loss Contingencies [Line Items]
Loss contingency, reduction to cost of sales		21
PM USA [Member] | Health Care Cost Recovery Actions, 2005 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		181
PM USA [Member] | Health Care Cost Recovery Actions, 2006 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		154
PM USA [Member] | Health Care Cost Recovery Actions, 2007 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		185
PM USA [Member] | Health Care Cost Recovery Actions, 2008 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		250
PM USA [Member] | Health Care Cost Recovery Actions, 2009 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		211
PM USA [Member] | Health Care Cost Recovery Actions, 2010 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		218
PM USA [Member] | Health Care Cost Recovery Actions, 2011 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		166
PM USA [Member] | Health Care Cost Recovery Actions, 2012 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		214
PM USA [Member] | Health Care Cost Recovery Actions, 2013 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		224
PM USA [Member] | Health Care Cost Recovery Actions, 2014 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		258
PM USA [Member] | Health Care Cost Recovery Actions, 2015 NPM Adjustments [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		313
PM USA [Member] | Health Care Cost Recovery Actions, 2016 NPM Adjustments [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		292
PM USA [Member] | Health Care Cost Recovery Actions, 2017 NPM Adjustments [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		285
PM USA [Member] | Health Care Cost Recovery Actions, 2018 NPM Adjustments [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		318
PM USA [Member] | Health Care Cost Recovery Actions, 2019 NPM Adjustments [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		415
PM USA [Member] | Health Care Cost Recovery Actions, 2020 NPM Adjustments [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		573
PM USA [Member] | Health Care Cost Recovery Actions, 2021 NPM Adjustments [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		$ 635
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		9
PM USA [Member] | Health Care Cost Recovery Actions, 2005-2007 NPM Adjustment [Member] | Pending Litigation [Member] | Period One
Loss Contingencies [Line Items]
Loss contingency, number of states not settled | state		8
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
Loss Contingencies [Line Items]
Loss contingency, number of states not settled | state		1
Loss contingency, number of states not settled, arbitration period		1 year
New York [Member] | PM USA [Member] | Health Care Cost Recovery Actions, Transition Years 2004-2018 [Member] | Settled Litigation [Member]
Loss Contingencies [Line Items]
Litigation settlement							$ 435
MONTANA | PM USA [Member] | Settled Litigation [Member]
Loss Contingencies [Line Items]
Litigation settlement					$ 4
Illinois [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Litigation settlement		$ 80
Illinois [Member] | PM USA [Member] | Health Care Cost Recovery Actions, Transition Years 2004-2021 | Settled Litigation [Member]
Loss Contingencies [Line Items]
Litigation settlement	$ 80
Illinois [Member] | PM USA [Member] | Health Care Cost Recovery Actions, Transition Years 2019-2021 | Settled Litigation [Member]
Loss Contingencies [Line Items]
Litigation settlement	$ 20