Segment and Geographic Information - Net Sales Mix By Primary Product Categories (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue from External Customer [Line Items]
Net sales	$ 4,310.7	$ 3,993.9	$ 11,615.6	$ 10,692.6
Cigarettes
Revenue from External Customer [Line Items]
Net sales	2,958.6	2,855.3	8,111.5	7,601.0
Food
Revenue from External Customer [Line Items]
Net sales	447.2	387.5	1,145.5	1,047.2
Fresh
Revenue from External Customer [Line Items]
Net sales	122.4	106.4	322.5	289.2
Candy
Revenue from External Customer [Line Items]
Net sales	249.1	165.6	601.3	465.9
Other tobacco products
Revenue from External Customer [Line Items]
Net sales	343.8	306.7	925.7	829.2
Health, beauty & general
Revenue from External Customer [Line Items]
Net sales	131.7	118.0	367.8	320.5
Beverages
Revenue from External Customer [Line Items]
Net sales	56.9	53.3	140.8	137.1
Equipment/other
Revenue from External Customer [Line Items]
Net sales	1.0	1.1	0.5	2.5
Total food/non-food products
Revenue from External Customer [Line Items]
Net sales	$ 1,352.1	$ 1,138.6	$ 3,504.1	$ 3,091.6