Contingencies (Engle Progeny Cases Trial Results - Pending and Concluded) (Details) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2020 USD ($) case	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2020 USD ($) case	Feb. 29, 2020 USD ($)	Jan. 31, 2020 USD ($)	Nov. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Feb. 28, 2019 USD ($)	Sep. 30, 2018 USD ($)	Jul. 31, 2018 USD ($)	Nov. 30, 2017 USD ($)	Apr. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Sep. 30, 2015 USD ($)	Jan. 31, 2015 USD ($)	Sep. 30, 2014 USD ($)	Jul. 31, 2014 USD ($)
PM USA [Member]
Loss Contingencies [Line Items]
Pre-tax charges (gain) included in net earning		$ 10	$ 17
Engle Progeny Cases, Berger [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded																		$ 6
Provision related to litigation recorded				$ 6
Engle Progeny Cases, Berger [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																		$ 21
Engle Progeny Cases, Santoro [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded															$ 2
Provision related to litigation recorded		1
Engle Progeny Cases, Santoro [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded															1
Punitive damages awarded															$ 1
Engle Progeny Cases, Duignan [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded						$ 3
Engle Progeny Cases, Duignan [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded						$ 12
Engle Progeny Cases, Cuddihee [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded							$ 3
Engle Progeny Cases, Cuddihee [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded							$ 0
Engle Progeny Cases, Rintoul [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded								$ 9
Engle Progeny Cases, Rintoul [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded								5
Punitive damages awarded								74
Engle Progeny Cases, Gloger [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded								15
Engle Progeny Cases, Gloger [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded								5
Punitive damages awarded								$ 11
Engle Progeny Cases, McCall [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded									$ 1
Engle Progeny Cases, McCall [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded									1
Punitive damages awarded									1
Engle Progeny Cases, Neff [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded									4
Engle Progeny Cases, Neff [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded									2
Engle Progeny Cases, Frogel [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded									1
Punitive damages awarded									$ 0
Engle Progeny Cases, Mahfuz [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded										$ 12
Engle Progeny Cases, Mahfuz [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded										10
Engle Progeny Cases, Holliman [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded										3
Engle Progeny Cases, Holliman [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded										$ 0
Engle Progeny Cases, Chadwell [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded											$ 2
Engle Progeny Cases, Chadwell [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded											$ 0
Engle Progeny Cases, Kaplan [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded												$ 2
Engle Progeny Cases, Kaplan [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded												$ 2
Engle Progeny Cases, R. Douglas [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded													$ 1
Engle Progeny Cases, R. Douglas [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded													$ 0
Engle Progeny Cases, Sommers [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded														$ 1
Engle Progeny Cases, Sommers [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded														$ 0
Engle Progeny Cases, Cooper [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded																$ 5
Engle Progeny Cases, Cooper [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded																1
Punitive damages awarded																$ 0
Engle Progeny Cases, D. Brown [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded																	$ 8
Engle Progeny Cases, D. Brown [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																	$ 9
Engle Progeny Cases, Harris [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded																			$ 2
Engle Progeny Cases, Harris [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded																			1
Punitive damages awarded																			$ 0
Engle Progeny Cases, Dean (Kerrivan) [Member] | Settled Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value	$ 26
Engle Progeny Cases, Landi [Member] | Settled Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value		$ 10
Engle Progeny Cases, Theis [Member] | Settled Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value			$ 17
Engle Progeny Cases, Naugle, Gore, M. Brown, Jordan [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number Of Cases With Payments A Year Or More Ago | case	4				4
Engle Progeny Cases, Naugle [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value					$ 8
Engle Progeny Cases, Gore [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value					2
Engle Progeny Cases, M. Brown [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value					9
Engle Progeny Cases, Jordan [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value					$ 4