Contingencies (Federal Government's Lawsuit Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended			12 Months Ended
	Dec. 31, 2011	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2014	Dec. 31, 1999
Loss Contingencies [Line Items]
Loss contingency, amount of district court deposit		$ 17.0	$ 5.0
Federal Governments Lawsuit [Member]
Loss Contingencies [Line Items]
Amount of alleged annual costs health care programs, minimum					$ 20,000.0
Damages sought, value					$ 280,000.0
Federal Governments Lawsuit [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Loss contingency, amount of district court deposit	$ 3.1
Loss contingency installment period, years	5 years
Implementation of Corrective Communications [Member] | Federal Governments Lawsuit [Member]
Loss Contingencies [Line Items]
Provision related to litigation recorded				$ 31.0
Implementation of Corrective Communications [Member] | Federal Governments Lawsuit [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Provision related to litigation recorded				$ 31.0