Contingencies Contingencies (2003-2014 NPM Adjustment Disputes - Continuing Disputes with Non-Signatory States other than New York) (Details) $ in Millions	1 Months Ended					3 Months Ended					6 Months Ended	9 Months Ended		33 Months Ended
	Jul. 31, 2015 state	Apr. 30, 2015 USD ($)	Apr. 30, 2014 USD ($) state	Sep. 30, 2013 state	Nov. 30, 1998 state	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Sep. 30, 2013 USD ($) state	Jun. 30, 2013 USD ($)	Sep. 30, 2015 USD ($) plantiff	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Oct. 26, 2015 USD ($)	May. 31, 2014 USD ($)
Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount						$ 126	$ 0					$ 126	$ 90
Number of states with settled litigation | state					46
Health Care Cost Recovery Actions, 2004 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain												388
Health Care Cost Recovery Actions, 2005 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain												181
Health Care Cost Recovery Actions, 2006 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain												154
Health Care Cost Recovery Actions, 2007 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain												185
Health Care Cost Recovery Actions, 2008 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain												250
Health Care Cost Recovery Actions, 2009 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain												211
Health Care Cost Recovery Actions, 2010 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain												218
Health Care Cost Recovery Actions, 2011 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain												166
Health Care Cost Recovery Actions, 2012 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain												211
Health Care Cost Recovery Actions, 2013 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain												219
Health Care Cost Recovery Actions, 2014 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain												$ 247
PM USA [Member] | Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Loss contingency, number of states | plantiff												52
PM USA [Member] | Pending Litigation [Member] | Health Care Cost Recovery Actions, 2003 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Settlement agreement, liability reduction percentage												20.00%
Loss contingency, number of states | state				15
Number of states that did not diligently enforcing escrow statutes | state				6
Number of states diligently enforcing escrow statute | state				9
Litigation settlement, amount										$ 145
Estimate of possible interest income										$ 89
Estimate of possible gain, not recorded												$ 25
Litigation settlement interest expense (income)									$ (64)
PM USA [Member] | Pending Litigation [Member] | Health Care Cost Recovery Actions, 2004 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Number of states with pending litigation | state	17
PM USA [Member] | Settled Litigation [Member] | Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount														$ 599
Number of states with settled litigation | plantiff												24
Indiana and Kentucky [Member] | PM USA [Member] | Settled Litigation [Member] | Health Care Cost Recovery Actions, 2003 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount								$ 80
Number of states with settled litigation | state										2
Litigation settlement interest expense (income)								17		$ (17)
Maryland, Missouri, New Mexico and Pennsylvania [Member] | PM USA [Member] | Pending Litigation [Member] | Health Care Cost Recovery Actions, 2003 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Number of states that did not diligently enforcing escrow statutes | state			4
Estimate of possible interest income										66
Litigation settlement interest expense (income)			$ (48)							(47)
PENNSYLVANIA | PM USA [Member] | Pending Litigation [Member] | Health Care Cost Recovery Actions, 2003 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Estimate of possible gain		$ 29
Estimate of possible interest income		(18)
Amount of possible loss		$ 29
Missouri [Member] | PM USA [Member] | Pending Litigation [Member] | Health Care Cost Recovery Actions, 2003 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Amount of possible loss						12						$ 12		12
Amount of possible interest loss						7						7		$ 7
Appeal bond posted																$ 22
Cost of Sales [Member] | Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount						$ (1,100)	$ (1,200)					(3,300)	$ (3,500)
Cost of Sales [Member] | PM USA [Member] | Pending Litigation [Member] | Health Care Cost Recovery Actions, 2003 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount										145
Cost of Sales [Member] | PM USA [Member] | Settled Litigation [Member] | Health Care Cost Recovery Actions [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount											$ 519
Cost of Sales [Member] | PM USA [Member] | Settled Litigation [Member] | Health Care Cost Recovery Actions, 2013 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount									$ 35			3
Cost of Sales [Member] | PM USA [Member] | Settled Litigation [Member] | Health Care Cost Recovery Actions, 2014 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount												$ 41
Cost of Sales [Member] | Indiana and Kentucky [Member] | PM USA [Member] | Settled Litigation [Member] | Health Care Cost Recovery Actions, 2003 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount								$ 43		37
Cost of Sales [Member] | Maryland, Missouri, New Mexico and Pennsylvania [Member] | PM USA [Member] | Pending Litigation [Member] | Health Care Cost Recovery Actions, 2003 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Litigation settlement, amount			$ 79							$ 108
Subsequent Event [Member] | MARYLAND | PM USA [Member] | Pending Litigation [Member] | Health Care Cost Recovery Actions, 2003 NPM Adjustment [Member]
Loss Contingencies [Line Items]
Amount of possible loss															$ 12
Amount of possible interest loss															$ 7