Contingencies (Smoking and Health Litigation - Engle Progeny Cases Trial Results - Pending and Concluded Narrative) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended	27 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Mar. 31, 2018	Jul. 31, 2018	May 31, 2018	Feb. 28, 2018	Nov. 30, 2017	Oct. 31, 2017	May 31, 2017	Apr. 30, 2017	Feb. 28, 2017	Dec. 31, 2016	Nov. 30, 2016	Nov. 30, 2015	Sep. 30, 2015	Aug. 31, 2015	Jul. 31, 2015	May 31, 2015	Feb. 28, 2015	Jan. 31, 2015	Nov. 30, 2014	Oct. 31, 2014	Sep. 30, 2014	Jul. 31, 2014	Jun. 30, 2013	Apr. 30, 2013
Loss Contingencies [Line Items]
Provision related to litigation recorded	$ 12	$ 21	$ 70	$ 28	$ 62	$ 0	$ 17	$ 1
Pending Litigation [Member] | Engle Progeny Cases, Berger [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																														$ 6
Provision related to litigation recorded	6
Pending Litigation [Member] | Engle Progeny Cases, Berger [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																														$ 21
Pending Litigation [Member] | Engle Progeny Cases, McKeever [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																										$ 6
Provision related to litigation recorded					20
Pending Litigation [Member] | Engle Progeny Cases, McKeever [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																										$ 12
Pending Litigation [Member] | Engle Progeny Cases, Pardue [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																			$ 5
Provision related to litigation recorded		1	9						$ 10
Pending Litigation [Member] | Engle Progeny Cases, Pardue [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																			$ 7
Pending Litigation [Member] | Engle Progeny Cases, Jordan [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																							$ 6
Provision related to litigation recorded			11
Pending Litigation [Member] | Engle Progeny Cases, Jordan [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																							$ 3
Pending Litigation [Member] | Engle Progeny Cases, M. Brown [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																									$ 6
Provision related to litigation recorded			7
Pending Litigation [Member] | Engle Progeny Cases, M. Brown [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																									0
Attorneys fees																									$ 7
Pending Litigation [Member] | Engle Progeny Cases, Boatright [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																												$ 15
Provision related to litigation recorded			41
Pending Litigation [Member] | Engle Progeny Cases, Boatright [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																												$ 20
Pending Litigation [Member] | Engle Progeny Cases, Searcy [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																																	$ 1
Provision related to litigation recorded		2
Pending Litigation [Member] | Engle Progeny Cases, Searcy [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																																	$ 2
Pending Litigation [Member] | Engle Progeny Cases, Chadwell [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)		2
Pending Litigation [Member] | Engle Progeny Cases, Chadwell [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded		0
Pending Litigation [Member] | Engle Progeny Cases, Kaplan [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)											$ 2
Pending Litigation [Member] | Engle Progeny Cases, Kaplan [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded											$ 2
Pending Litigation [Member] | Engle Progeny Cases, Landi [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)			8
Pending Litigation [Member] | Engle Progeny Cases, Landi [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded			5
Pending Litigation [Member] | Engle Progeny Cases, Theis [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)												$ 7
Pending Litigation [Member] | Engle Progeny Cases, Theis [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded												$ 10
Pending Litigation [Member] | Engle Progeny Cases, Freeman [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)				4						$ 4
Pending Litigation [Member] | Engle Progeny Cases, Freeman [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded				0						0
Pending Litigation [Member] | Engle Progeny Cases, Gloger [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)													$ 8
Pending Litigation [Member] | Engle Progeny Cases, Gloger [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded													$ 5
Pending Litigation [Member] | Engle Progeny Cases, Bryant [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)					1
Pending Litigation [Member] | Engle Progeny Cases, Bryant [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded					1
Pending Litigation [Member] | Engle Progeny Cases, R. Douglas [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)														$ 1
Pending Litigation [Member] | Engle Progeny Cases, R. Douglas [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded														$ 0
Pending Litigation [Member] | Engle Progeny Cases, Wallace [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)															$ 12
Pending Litigation [Member] | Engle Progeny Cases, Wallace [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded															$ 16
Pending Litigation [Member] | Engle Progeny Cases, L. Martin [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																$ 1
Pending Litigation [Member] | Engle Progeny Cases, L. Martin [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																1
Punitive damages awarded																$ 1
Pending Litigation [Member] | Engle Progeny Cases, Sommers [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																	$ 1
Pending Litigation [Member] | Engle Progeny Cases, Sommers [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																	$ 0
Pending Litigation [Member] | Engle Progeny Cases, Santoro [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)								2
Pending Litigation [Member] | Engle Progeny Cases, Santoro [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded								$ 0
Pending Litigation [Member] | Engle Progeny Cases, J. Brown [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																		$ 5
Pending Litigation [Member] | Engle Progeny Cases, J. Brown [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																		$ 1
Pending Litigation [Member] | Engle Progeny Cases, Martin [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																				$ 5
Pending Litigation [Member] | Engle Progeny Cases, Martin [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																				$ 0
Pending Litigation [Member] | Engle Progeny Cases, Danielson [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																					$ 3
Pending Litigation [Member] | Engle Progeny Cases, Danielson [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																					$ 1
Pending Litigation [Member] | Engle Progeny Cases, Cooper [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																						$ 5
Pending Litigation [Member] | Engle Progeny Cases, Cooper [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																						1
Punitive damages awarded																						$ 0
Pending Litigation [Member] | Engle Progeny Cases, McCoy [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																								$ 2
Pending Litigation [Member] | Engle Progeny Cases, McCoy [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																								1
Punitive damages awarded																								$ 3
Pending Litigation [Member] | Engle Progeny Cases, D. Brown [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																											$ 8
Pending Litigation [Member] | Engle Progeny Cases, D. Brown [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																											$ 9
Pending Litigation [Member] | Engle Progeny Cases, Kerrivan [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																													$ 16
Pending Litigation [Member] | Engle Progeny Cases, Kerrivan [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																													$ 16
Pending Litigation [Member] | Engle Progeny Cases, Harris [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																															$ 2
Pending Litigation [Member] | Engle Progeny Cases, Harris [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																															$ 0
Pending Litigation [Member] | Engle Progeny Cases, Skolnick [Member]
Loss Contingencies [Line Items]
Compensatory damages awarded (less than)																																$ 0
Pending Litigation [Member] | Engle Progeny Cases, Skolnick [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded																																$ 0
Settled Litigation [Member] | Engle Progeny Cases, Perrotto [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)	$ 1	1
Settled Litigation [Member] | Engle Progeny Cases, Gore [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)				1
Settled Litigation [Member] | Engle Progeny Cases, Putney [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)		5
Settled Litigation [Member] | Engle Progeny Cases, Sermons [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)		$ 1
Settled Litigation [Member] | Engle Progeny Cases, Tognoli [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)					1
Settled Litigation [Member] | Engle Progeny Cases, Howles [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)				6
Settled Litigation [Member] | Engle Progeny Cases, Purdo [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)				10
Settled Litigation [Member] | Engle Progeny Cases, Griffin [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)							1
Settled Litigation [Member] | Engle Progeny Cases, Ledoux [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)					20
Settled Litigation [Member] | Engle Progeny Cases, Burkhart [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)			$ 2
Settled Litigation [Member] | Engle Progeny Cases, Barbose [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)					12
Settled Litigation [Member] | Engle Progeny Cases, Allen [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)				10
Settled Litigation [Member] | Engle Progeny Cases, Ahrens [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)					7
Settled Litigation [Member] | Engle Progeny Cases, Starr-Blundell [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)										$ 1
Settled Litigation [Member] | Engle Progeny Cases, Zamboni [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)				$ 1
Settled Litigation [Member] | Engle Progeny Cases, Graham [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)							1
Settled Litigation [Member] | Engle Progeny Cases, Naugle [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)							14
Settled Litigation [Member] | Engle Progeny Cases, Lourie [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)							$ 3
Settled Litigation [Member] | Engle Progeny Cases, Marchese [Member] | Philip Morris USA [Member]
Loss Contingencies [Line Items]
Damages awarded, value (less than)					$ 1