Segments of Business (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Segment Reporting [Abstract]
Reporting Segments Number									3
Segment Reporting Information [Line Items]
Revenues	$ 1,002.8	$ 1,026.4	$ 1,033.3	$ 1,027.4	$ 1,003.6	$ 1,035.1	$ 1,012.1	$ 995.4	$ 4,089.9	$ 4,046.2	$ 4,004.4
Operating Profit and Pretax Profit:
Operating Income (Loss)									359.0	122.0	411.3
Goodwill and Intangible Asset Impairment									0.0	196.6	0.0
Interest expense									76.1	65.8	60.2
Other non-operating (income) expense, net									(2.8)	3.5	0.2
Income from continuing operations before income taxes									285.7	52.7	350.9
Total assets	3,571.0				3,699.9				3,571.0	3,699.9	3,715.7
Restructuring and other costs									61.9	60.4	28.6
Depreciation and amortization									167.6	169.8	162.1
Additions to property and equipment									143.5	188.5	208.3
Long-lived assets	1,332.8				1,416.3				$ 1,332.8	$ 1,416.3	$ 1,362.6
Segment Reporting, Disclosure of Major Customers									0.11	0.10	0.1
USPackaging [Member]
Segment Reporting Information [Line Items]
Revenues									$ 2,698.5	$ 2,626.0	$ 2,621.1
Operating Profit and Pretax Profit:
Operating Income (Loss)									360.2	352.5	400.0
Total assets	2,082.5				2,072.0				2,082.5	2,072.0	2,007.7
Restructuring and other costs									11.5	13.3	0.0
Depreciation and amortization									96.6	97.9	93.7
Additions to property and equipment									75.5	101.9	131.2
Latin America [Member]
Segment Reporting Information [Line Items]
Revenues									628.6	711.4	703.1
Operating Profit and Pretax Profit:
Operating Income (Loss)									48.1	30.0	50.0
Goodwill and Intangible Asset Impairment										196.6
Total assets	551.9				648.1				551.9	648.1	779.2
Restructuring and other costs									9.5	28.8	18.9
Depreciation and amortization									22.6	26.7	26.2
Additions to property and equipment									32.3	45.2	32.9
Rest of World [Member]
Segment Reporting Information [Line Items]
Revenues									762.8	708.8	680.2
Operating Profit and Pretax Profit:
Operating Income (Loss)									81.2	61.1	64.0
Total assets	742.3				784.5				742.3	784.5	706.1
Restructuring and other costs									1.9	2.7	7.7
Depreciation and amortization									32.8	30.2	27.9
Additions to property and equipment									27.2	35.0	36.8
Restructuring and acquisition-related costs [Member]
Operating Profit and Pretax Profit:
Operating Income (Loss)									61.9	60.4	28.6
GeneralCorporateExpenses [Member]
Operating Profit and Pretax Profit:
Operating Income (Loss)									68.6	64.6	74.1
Unallocated amount to segment
Operating Profit and Pretax Profit:
Total assets	194.3				195.3				194.3	195.3	222.7
Restructuring and other costs									39.0	15.6	2.0
Depreciation and amortization									15.6	15.0	14.3
Additions to property and equipment									8.5	6.4	7.4
UNITED STATES
Segment Reporting Information [Line Items]
Revenues									2,948.3	2,847.3	2,845.3
Operating Profit and Pretax Profit:
Long-lived assets	917.5				957.4				917.5	957.4	949.2
UNITED STATES | USPackaging [Member]
Segment Reporting Information [Line Items]
Revenues									2,698.5	2,626.0	2,621.1
UNITED STATES | Latin America [Member]
Segment Reporting Information [Line Items]
Revenues									0.0	0.0	0.0
UNITED STATES | Rest of World [Member]
Segment Reporting Information [Line Items]
Revenues									249.8	221.3	224.2
BRAZIL
Segment Reporting Information [Line Items]
Revenues									420.7	482.1	483.5
Operating Profit and Pretax Profit:
Long-lived assets	191.6				223.6				191.6	223.6	212.9
BRAZIL | USPackaging [Member]
Segment Reporting Information [Line Items]
Revenues									0.0	0.0	0.0
BRAZIL | Latin America [Member]
Segment Reporting Information [Line Items]
Revenues									420.7	482.1	483.5
BRAZIL | Rest of World [Member]
Segment Reporting Information [Line Items]
Revenues									0.0	0.0	0.0
Other Americas [Member]
Segment Reporting Information [Line Items]
Revenues									207.9	229.3	219.6
Operating Profit and Pretax Profit:
Long-lived assets	48.4				51.9				48.4	51.9	44.1
Other Americas [Member] | USPackaging [Member]
Segment Reporting Information [Line Items]
Revenues									0.0	0.0	0.0
Other Americas [Member] | Latin America [Member]
Segment Reporting Information [Line Items]
Revenues									207.9	229.3	219.6
Other Americas [Member] | Rest of World [Member]
Segment Reporting Information [Line Items]
Revenues									0.0	0.0	0.0
Europe [Member]
Segment Reporting Information [Line Items]
Revenues									321.5	290.0	263.5
Operating Profit and Pretax Profit:
Long-lived assets	90.7				93.3				90.7	93.3	75.1
Europe [Member] | USPackaging [Member]
Segment Reporting Information [Line Items]
Revenues									0.0	0.0	0.0
Europe [Member] | Latin America [Member]
Segment Reporting Information [Line Items]
Revenues									0.0	0.0	0.0
Europe [Member] | Rest of World [Member]
Segment Reporting Information [Line Items]
Revenues									321.5	290.0	263.5
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues									191.5	197.5	192.5
Operating Profit and Pretax Profit:
Long-lived assets	$ 84.6				$ 90.1				84.6	90.1	81.3
Asia Pacific [Member] | USPackaging [Member]
Segment Reporting Information [Line Items]
Revenues									0.0	0.0	0.0
Asia Pacific [Member] | Latin America [Member]
Segment Reporting Information [Line Items]
Revenues									0.0	0.0	0.0
Asia Pacific [Member] | Rest of World [Member]
Segment Reporting Information [Line Items]
Revenues									191.5	197.5	192.5
Intersegment Eliminations [Member] | USPackaging [Member]
Segment Reporting Information [Line Items]
Revenues									(40.6)	(40.0)	(25.7)
Intersegment Eliminations [Member] | Latin America [Member]
Segment Reporting Information [Line Items]
Revenues									(3.2)	(3.8)	(3.9)
Intersegment Eliminations [Member] | Rest of World [Member]
Segment Reporting Information [Line Items]
Revenues									(11.1)	(12.6)	(16.2)
Operating Segments [Member] | USPackaging [Member]
Segment Reporting Information [Line Items]
Revenues									2,739.1	2,666.0	2,646.8
Operating Segments [Member] | Latin America [Member]
Segment Reporting Information [Line Items]
Revenues									631.8	715.2	707.0
Operating Segments [Member] | Rest of World [Member]
Segment Reporting Information [Line Items]
Revenues									$ 773.9	$ 721.4	$ 696.4