Contingencies (Engle Class Action And Engle Progeny Trial Results Narrative) (Details) $ in Millions		1 Months Ended						3 Months Ended		12 Months Ended
	Apr. 25, 2016 case	Mar. 31, 2015 USD ($)	Feb. 28, 2015 case	Jun. 30, 2009 USD ($) case	Feb. 29, 2008 USD ($)	Jul. 31, 2006 USD ($) plantiff	May. 31, 2001 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($) case	Dec. 31, 2008 court	Jun. 30, 2014 case	Mar. 31, 2014 case	Jul. 31, 2000 USD ($)
Loss Contingencies [Line Items]
Payments made related to litigation | $								$ 17.0	$ 5.0
Engle Progeny Cases [Member]
Loss Contingencies [Line Items]
Punitive damages awarded | $													$ 145,000.0
Number of cases with petitions for writ of certiorari												8
Number of cases with petitions for writ of certiorari denied											11
Engle Progeny Cases [Member] | FLORIDA
Loss Contingencies [Line Items]
Number of district courts with rulings | court										3
Number of rulings certified by trial court for interlocutory review | court										2
Engle Progeny Cases [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Punitive damages awarded | $													$ 74,000.0
Amounts placed in escrow | $							$ 500.0
Period for members of decertified class to file individual actions against defendants						1 year
Number of cases with petitions for writ of certiorari												1
Engle Progeny Cases, Federal [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Amounts placed in escrow | $		$ 43.0							$ 43.0
Number of claims resolved			415						415
Pre-tax charges | $									$ 43.0
Engle Progeny Cases, State [Member] | FLORIDA
Loss Contingencies [Line Items]
Florida bond cap | $				$ 200.0
Engle Progeny Cases, State [Member] | Escambia County, Florida [Member]
Loss Contingencies [Line Items]
Number of cases in which plaintiffs that challenged constitutionality of bond cap statute				1
Engle Progeny Cases, State [Member] | Alachua County, Florida [Member]
Loss Contingencies [Line Items]
Number of cases in which plaintiffs that challenged constitutionality of bond cap statute				3
Engle Progeny Cases, State [Member] | PM USA [Member] | FLORIDA
Loss Contingencies [Line Items]
Compensatory damages awarded | $						$ 6.9
Number of individual plaintiffs reinstated | plantiff						2
Payments made related to litigation | $					$ 3.0
Subsequent Event [Member] | Engle Progeny Cases [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Number of cases pending	2
Number of verdicts returned	96
Number of unfavorable verdicts	53
Number of favorable verdicts	41
Subsequent Event [Member] | Engle Progeny Cases, Federal [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Number of cases pending	21
Number of favorable verdicts	9
Subsequent Event [Member] | Engle Progeny Cases, State [Member]
Loss Contingencies [Line Items]
Number of cases pending	2,860
Number of plaintiffs	3,700
Subsequent Event [Member] | Engle Progeny Cases, State [Member] | PM USA [Member]
Loss Contingencies [Line Items]
Number of favorable verdicts	32