Contingencies (Health Care Cost Recovery Litigation - NPM Adjustment Disputes - Settlement with 36 States and Territories and Settlement with New York) (Details) $ in Millions	1 Months Ended			3 Months Ended			12 Months Ended
	Apr. 30, 2018 USD ($)	Oct. 31, 2017 USD ($) state	Nov. 30, 1998 state	Jun. 30, 2018 USD ($) state	Mar. 31, 2018 USD ($) state	Dec. 31, 2017 USD ($)	Dec. 31, 2018 state claim	Dec. 31, 2015 USD ($)	Dec. 31, 2012 state
Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Number of states with settled litigation | state			46
Health Care Cost Recovery Actions [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Loss contingency, number of states | state							52
Reduction to cost of sales				$ 90
Health Care Cost Recovery Actions, 2016 NPM Adjustments [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Reduction to cost of sales						$ 39
Health Care Cost Recovery Actions, 2017 NPM Adjustments [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Reduction to cost of sales				38
Settled Litigation [Member] | Health Care Cost Recovery Actions [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Number of states with settled litigation, first settlement | state							36
Number of claims resolved | claim							2
Number of states with settled litigation | state							37
Loss contingency number of states with settled litigation including new york | state									19
Litigation settlement amount								$ 217
Settled Litigation [Member] | Health Care Cost Recovery Actions, 2003-2015 NPM Adjustments [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Number of states with settled litigation, first settlement | state		26
Litigation settlement amount		$ 740
Settled Litigation [Member] | Health Care Cost Recovery Actions, 2004-2017 [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Litigation settlement amount				90	$ 81
Number of additional states with settled litigation | state					9
Proceeds from legal settlements	$ 68
Settled Litigation [Member] | Health Care Cost Recovery Actions, 2015-2017 Transition Years [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Litigation settlement amount				$ 13	$ 13
Settled Litigation [Member] | Health Care Cost Recovery Actions, 2016 and 2017 NPM Adjustments [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Number of states with settled litigation, first settlement | state				26
Litigation settlement amount				$ 77