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Contingencies (Engle Progeny Cases Trial Results - Pending and Concluded) (Details) $ in Millions	1 Months Ended		3 Months Ended
	Apr. 29, 2021 USD ($)	Feb. 28, 2021 USD ($)	Mar. 31, 2021 USD ($) case	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2018 USD ($)	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 ($)	Sep. 30, 2015 USD ($)	Jan. 31, 2015 USD ($)
PM USA [Member]
Loss Contingencies [Line Items]
Pre-tax charges (gain) included in net earning					$ 10.0
Engle Progeny Cases, Duignan [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded							$ 3.0
Engle Progeny Cases, Duignan [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded							$ 12.0
Engle Progeny Cases, Cuddihee [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded								$ 3.0
Engle Progeny Cases, Cuddihee [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded								$ 0.0
Engle Progeny Cases, Rintoul [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded									$ 9.0
Engle Progeny Cases, Rintoul [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded									74.0
Engle Progeny Cases, Gloger [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded									15.0
Engle Progeny Cases, Gloger [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded									$ 11.0
Engle Progeny Cases, McCall [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded										$ 1.0
Engle Progeny Cases, McCall [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded										1.0
Punitive damages awarded										0.0
Engle Progeny Cases, Neff [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded										4.0
Engle Progeny Cases, Neff [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded										$ 2.0
Engle Progeny Cases, Mahfuz [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded											$ 12.0
Engle Progeny Cases, Mahfuz [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded											10.0
Engle Progeny Cases, Holliman [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded											3.0
Engle Progeny Cases, Holliman [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded											$ 0.0
Engle Progeny Cases, Chadwell [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded												$ 2.0
Engle Progeny Cases, Chadwell [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded												$ 0.0
Engle Progeny Cases, Kaplan [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded													$ 2.0
Engle Progeny Cases, Kaplan [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded													$ 2.0
Engle Progeny Cases, R. Douglas [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded														$ 1.0
Engle Progeny Cases, R. Douglas [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded														$ 0.0
Engle Progeny Cases, Sommers [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded															$ 1.0
Provision related to litigation recorded			$ 1.0
Damages awarded, value			3.0
Engle Progeny Cases, Sommers [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded															$ 0.0
Engle Progeny Cases, Cooper [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded																$ 5.0
Engle Progeny Cases, Cooper [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded																1.0
Punitive damages awarded																$ 0.0
Engle Progeny Cases, D. Brown [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded																	$ 8.0
Engle Progeny Cases, D. Brown [Member] | Pending Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																	$ 9.0
Engle Progeny Cases, Berger [Member] | Settled Litigation [Member]
Loss Contingencies [Line Items]
Damages awarded, value			29.0			$ 29.0
Additional fees		$ 1.5
Engle Progeny Cases, Berger [Member] | Settled Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Pre-tax charges (gain) included in net earning			21.0			$ 6.0
Engle Progeny Cases, Santoro [Member] | Settled Litigation [Member]
Loss Contingencies [Line Items]
Damages awarded, value			1.0		1.0
Engle Progeny Cases, Santoro [Member] | Settled Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Pre-tax charges (gain) included in net earning			$ 0.2		0.8
Engle Progeny Cases, Dean (Kerrivan) [Member] | Settled Litigation [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Pre-tax charges (gain) included in net earning				$ 26.0
Engle Progeny Cases, Landi [Member] | Settled Litigation [Member]
Loss Contingencies [Line Items]
Damages awarded, value					$ 10.0
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
Engle Progeny Cases, Naugle [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value			$ 8.0
Engle Progeny Cases, Gore [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value			2.0
Engle Progeny Cases, M. Brown [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value			8.0
Engle Progeny Cases, M. Brown [Member] | PM USA [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Pre-tax charges (gain) included in net earning	$ 8.2
Engle Progeny Cases, Jordan [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value			$ 4.0

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