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Segment Reporting Segment Reporting (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2013
NPM Adjustment to Cost Of Sales [Member]
Smokeable Products [Member]
Mar. 31, 2013
NPM Adjustment to Cost Of Sales [Member]
Smokeable Products [Member]
Jun. 30, 2013
NPM Adjustment to Cost Of Sales [Member]
Smokeable Products [Member]
Segment Reporting Information [Line Items]        
Decrease to Allowance $ 10      
Decrease in Cost of Sales   $ 36 $ 483 $ 519