Segments of Business (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)
Segment Reporting [Abstract]
Reporting Segments Number			2
Segment reporting information
Revenue	$ 1,027.2	$ 1,018.3	$ 3,016.4	$ 3,088.7
Operating Profit and Pretax Profit:
Operating Income (Loss)	116.2	105.8	304.6	312.4
Interest expense	15.1	12.6	44.5	38.5
Other non-operating (income) expense, net	(0.6)	(0.8)	(1.1)	(4.8)
Income from continuing operations before income taxes	101.7	94.0	261.2	278.7
USPackaging [Member]
Operating Profit and Pretax Profit:
Operating Income (Loss)	100.8	100.0	306.0	298.3
GlobalPackaging [Member]
Operating Profit and Pretax Profit:
Operating Income (Loss)	31.8	29.9	56.0	81.2
GlobalPackagingBeforeRestructuring [Member] [Member]
Operating Profit and Pretax Profit:
Operating Income (Loss)	36.2	31.8	80.6	88.4
GlobalPackagingRestructuring [Member]
Operating Profit and Pretax Profit:
Operating Income (Loss)	(4.4)	(1.9)	(24.6)	(7.2)
GeneralCorporateExpenses [Member]
Operating Profit and Pretax Profit:
Operating Income (Loss)	(16.4)	(24.1)	(57.4)	(67.1)
Operating Segments [Member] | USPackaging [Member]
Segment reporting information
Revenue	664.8	696.7	2,009.5	2,111.8
Operating Segments [Member] | GlobalPackaging [Member]
Segment reporting information
Revenue	374.6	332.6	1,043.5	1,014.4
Intersegment Eliminations [Member] | USPackaging [Member]
Segment reporting information
Revenue	(7.2)	(6.5)	(20.4)	(19.9)
Intersegment Eliminations [Member] | GlobalPackaging [Member]
Segment reporting information
Revenue	$ (5.0)	$ (4.5)	$ (16.2)	$ (17.6)