Contingencies (Scott Class Action Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended		0 Months Ended		0 Months Ended		3 Months Ended
	Aug. 31, 2011 Smoking And Health Class Actions And Aggregated Claims Litigation [Member]	Mar. 31, 2012 Smoking And Health Class Actions And Aggregated Claims Litigation [Member] Louisiana/Scott [Member]	Jun. 30, 2011 Smoking And Health Class Actions And Aggregated Claims Litigation [Member] Louisiana/Scott [Member]	Oct. 31, 2011 Scott Class Action [Member]	Mar. 31, 2012 Scott Class Action [Member]	Oct. 31, 2011 Minimum [Member] Scott Class Action [Member]	Oct. 31, 2011 Maximum [Member] Scott Class Action [Member]	Jun. 30, 2011 Previously Recorded [Member] Smoking And Health Class Actions And Aggregated Claims Litigation [Member] Louisiana/Scott [Member]
Loss Contingencies [Line Items]
Compensatory damages jury award total excluding interest		$ 590,000,000
Loss contingency, period of occurrence		May 2004
Court Of Appeals reduced award date		April 2010
Court of Appeals reduced award amount		241,000,000
Share of judgment paid	70,000,000
Loss contingency, attorney fees sought						96,000,000	673,000,000
Loss contingency, attorney costs sought				13,000,000
Loss contingency, damages recorded			36,000,000					30,000,000
Loss contingency, interest accrued			5,000,000
Loss contingency accrual for costs at carrying value					$ 1,300,000