Restructuring (Details) $ in Millions	3 Months Ended	6 Months Ended	14 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
2016 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring and Related Cost Number of Planned Closure Facilities		4
Restructuring and Related Cost Number of Facilities Closed		3
Restructuring Charges		$ 6.6
Restructuring Reserve Settled		(9.5)
Restructuring Reserve, Translation and Other Adjustment		(0.2)
Restructuring Reserve	$ 8.6	8.6	$ 8.6	$ 11.7
Payments for Restructuring	4.5	9.5
Restructuring and Related Cost, Expected Cost	31.0	31.0	31.0
Expected Cash Payments for Plant Closure		$ 8.2
2017 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring and Related Cost Number of Planned Closure Facilities		2
Restructuring and Related Cost, Expected Number of Positions Eliminated		300
Restructuring Charges	20.4	$ 20.4
Restructuring and Related Cost, Expected Cost Remaining	14.4	14.4	14.4
Restructuring Reserve Settled		(4.2)
Restructuring Reserve	16.2	16.2	16.2
Restructuring and Related Cost, Expected Cost	34.8	34.8	34.8
Employee Related Costs [Member] | 2016 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring Charges		0.1
Restructuring Reserve Settled		(4.0)
Restructuring Reserve, Translation and Other Adjustment		0.1
Restructuring Reserve	5.6	5.6	5.6	9.4
Restructuring and Related Cost, Expected Cost	15.0	15.0	15.0
Employee Related Costs [Member] | 2017 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring Charges		16.2
Restructuring Reserve Settled		0.0
Restructuring Reserve	16.2	16.2	16.2
Fixed Asset Related Expenses [Member] | 2016 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring Charges		0.6
Restructuring Reserve Settled		(0.3)
Restructuring Reserve, Translation and Other Adjustment		(0.2)
Restructuring Reserve	0.1	0.1	0.1	0.0
Restructuring and Related Cost, Expected Cost	3.0	3.0	3.0
Fixed Asset Related Expenses [Member] | 2017 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring Charges		4.2
Restructuring Reserve Settled		(4.2)
Restructuring Reserve	0.0	0.0	0.0
Restructuring and Related Cost, Expected Cost	12.0	12.0	12.0
Other Costs [Member] | 2016 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring Charges		5.9
Restructuring Reserve Settled		(5.2)
Restructuring Reserve, Translation and Other Adjustment		(0.1)
Restructuring Reserve	2.9	2.9	2.9	$ 2.3
Other Costs [Member] | 2017 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring Charges		0.0
Restructuring Reserve Settled		0.0
Restructuring Reserve	0.0	0.0	0.0
USPackaging [Member] | 2017 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring Charges		6.7
Restructuring and Related Cost, Expected Cost Remaining	10.1	10.1	10.1
Restructuring and Related Cost, Expected Cost	16.8	16.8	16.8
Corporate Segment [Member] | 2017 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring Charges		1.3
Restructuring and Related Cost, Expected Cost Remaining	0.0	0.0	0.0
Restructuring and Related Cost, Expected Cost	1.3	1.3	1.3
GlobalPackaging [Member] | 2016 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring Charges	2.6		28.2
GlobalPackaging [Member] | 2017 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring Charges		12.4
Restructuring and Related Cost, Expected Cost Remaining	4.3	4.3	4.3
Restructuring and Related Cost, Expected Cost	16.7	16.7	16.7
Minimum [Member] | 2017 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring and Related Cost, Expected Cost	35.0	35.0	35.0
Expected Cash Payments for Plant Closure		3.0
Minimum [Member] | Employee Related Costs [Member] | 2017 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring and Related Cost, Expected Cost	17.0	17.0	17.0
Minimum [Member] | Other Costs [Member] | 2016 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring and Related Cost, Expected Cost	12.0	12.0	12.0
Minimum [Member] | Other Costs [Member] | 2017 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring and Related Cost, Expected Cost	6.0	6.0	6.0
Maximum [Member] | 2017 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring and Related Cost, Expected Cost	38.0	38.0	38.0
Expected Cash Payments for Plant Closure		4.0
Maximum [Member] | Employee Related Costs [Member] | 2017 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring and Related Cost, Expected Cost	19.0	19.0	19.0
Maximum [Member] | Other Costs [Member] | 2016 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring and Related Cost, Expected Cost	13.0	13.0	13.0
Maximum [Member] | Other Costs [Member] | 2017 Restructuring Program [Member]
Restructuring Reserve Disclosures [Line Items]
Restructuring and Related Cost, Expected Cost	$ 7.0	$ 7.0	$ 7.0