Guarantor Condensed Consolidating Financial Statements - Statements of Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 57.8	$ 60.2	$ 193.1	$ 172.9
Non-cash Items Included in Net Income:
Depreciation and Amortization	78.2	73.5	224.1	212.8
Deferred Income Taxes			55.1	90.1
Amount of Postretirement Expense Less Than Funding			(24.3)	(28.8)
Equity in Net Earnings of Subsidiaries	0.0	0.0	0.0	0.0
Other, Net			32.6	21.1
Changes in Operating Assets and Liabilities			(86.3)	(117.1)
Net Cash Provided by Operating Activities			394.3	351.0
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Spending			(248.7)	(173.0)
Packaging Machinery Spending			(9.7)	(8.7)
Acquisition of Businesses, Net of Cash Acquired			(331.9)	(113.6)
Other, Net			(4.1)	1.2
Net Cash Provided by (Used in) Investing Activities			(594.4)	(294.1)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchase of Common Stock			(106.4)	(23.0)
Payments on Debt			(18.8)	(18.7)
Proceeds from Issuance of Debt			300.0	0.0
Borrowings under Revolving Credit Facilities			1,013.3	748.9
Payments on Revolving Credit Facilities			(933.3)	(704.5)
Debt Issuance Costs			(5.1)	0.0
Dividends Paid			(48.5)	(32.9)
Repurchase of Common Stock related to Share-Based Payments			(10.6)	(21.3)
Other, Net			(0.5)	(1.1)
Net Cash (Used in) Provided by Financing Activities			190.1	(52.6)
Effect of Exchange Rate Changes on Cash			0.8	(4.4)
Net Increase (Decrease) in Cash and Cash Equivalents			(9.2)	(0.1)
Cash and Cash Equivalents at Beginning of Period			54.9	81.6
CASH AND CASH EQUIVALENTS AT END OF PERIOD	45.7	81.5	45.7	81.5
Reportable Legal Entities | Parent
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	57.8	60.2	193.1	172.9
Non-cash Items Included in Net Income:
Depreciation and Amortization			0.0	0.0
Deferred Income Taxes			0.0	0.0
Amount of Postretirement Expense Less Than Funding			0.0	0.0
Equity in Net Earnings of Subsidiaries	(57.8)	(60.2)	(193.1)	(172.9)
Other, Net			0.0	0.0
Changes in Operating Assets and Liabilities			0.0	0.0
Net Cash Provided by Operating Activities			0.0	0.0
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Spending			0.0	0.0
Packaging Machinery Spending			0.0	0.0
Acquisition of Businesses, Net of Cash Acquired			0.0	0.0
Other, Net			165.5	77.2
Net Cash Provided by (Used in) Investing Activities			165.5	77.2
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchase of Common Stock			(106.4)	(23.0)
Payments on Debt			0.0	0.0
Proceeds from Issuance of Debt			0.0
Borrowings under Revolving Credit Facilities			0.0	0.0
Payments on Revolving Credit Facilities			0.0	0.0
Debt Issuance Costs			0.0
Dividends Paid			(48.5)	(32.9)
Repurchase of Common Stock related to Share-Based Payments			(10.6)	(21.3)
Other, Net			0.0	0.0
Net Cash (Used in) Provided by Financing Activities			(165.5)	(77.2)
Effect of Exchange Rate Changes on Cash			0.0	0.0
Net Increase (Decrease) in Cash and Cash Equivalents			0.0	0.0
Cash and Cash Equivalents at Beginning of Period			0.0	0.0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	0.0	0.0	0.0	0.0
Reportable Legal Entities | Subsidiary Issuer
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	57.8	60.2	193.1	172.9
Non-cash Items Included in Net Income:
Depreciation and Amortization			174.7	176.4
Deferred Income Taxes			51.8	83.2
Amount of Postretirement Expense Less Than Funding			(20.3)	(22.9)
Equity in Net Earnings of Subsidiaries	(3.9)	(6.3)	(20.7)	(22.0)
Other, Net			32.2	22.4
Changes in Operating Assets and Liabilities			(27.2)	(186.1)
Net Cash Provided by Operating Activities			383.6	223.9
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Spending			(208.5)	(139.8)
Packaging Machinery Spending			(9.7)	(8.7)
Acquisition of Businesses, Net of Cash Acquired			(173.1)	0.0
Other, Net			(164.1)	(1.7)
Net Cash Provided by (Used in) Investing Activities			(555.4)	(150.2)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchase of Common Stock			0.0	0.0
Payments on Debt			(18.8)	(18.7)
Proceeds from Issuance of Debt			300.0
Borrowings under Revolving Credit Facilities			955.9	714.6
Payments on Revolving Credit Facilities			(887.7)	(646.8)
Debt Issuance Costs			(5.1)
Dividends Paid			0.0	0.0
Repurchase of Common Stock related to Share-Based Payments			0.0	0.0
Other, Net			(166.0)	(78.3)
Net Cash (Used in) Provided by Financing Activities			178.3	(29.2)
Effect of Exchange Rate Changes on Cash			0.0	0.0
Net Increase (Decrease) in Cash and Cash Equivalents			6.5	44.5
Cash and Cash Equivalents at Beginning of Period			0.1	2.0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	6.6	46.5	6.6	46.5
Reportable Legal Entities | Combined Guarantor Subsidiaries
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	0.6	(0.8)	(0.9)	(0.3)
Non-cash Items Included in Net Income:
Depreciation and Amortization			10.8	1.4
Deferred Income Taxes			0.8	(0.3)
Amount of Postretirement Expense Less Than Funding			0.0	0.0
Equity in Net Earnings of Subsidiaries	(0.9)	1.3	2.6	0.3
Other, Net			0.0	0.0
Changes in Operating Assets and Liabilities			(12.7)	(0.9)
Net Cash Provided by Operating Activities			0.6	0.2
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Spending			0.0	(0.2)
Packaging Machinery Spending			0.0	0.0
Acquisition of Businesses, Net of Cash Acquired			0.0	0.0
Other, Net			0.0	0.0
Net Cash Provided by (Used in) Investing Activities			0.0	(0.2)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchase of Common Stock			0.0	0.0
Payments on Debt			0.0	0.0
Proceeds from Issuance of Debt			0.0
Borrowings under Revolving Credit Facilities			0.0	0.0
Payments on Revolving Credit Facilities			0.0	0.0
Debt Issuance Costs			0.0
Dividends Paid			0.0	0.0
Repurchase of Common Stock related to Share-Based Payments			0.0	0.0
Other, Net			0.0	0.0
Net Cash (Used in) Provided by Financing Activities			0.0	0.0
Effect of Exchange Rate Changes on Cash			0.0	0.0
Net Increase (Decrease) in Cash and Cash Equivalents			0.6	0.0
Cash and Cash Equivalents at Beginning of Period			0.0	0.0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	0.6	0.0	0.6	0.0
Reportable Legal Entities | Combined Nonguarantor Subsidiaries
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	4.2	5.8	19.0	22.0
Non-cash Items Included in Net Income:
Depreciation and Amortization			38.6	35.0
Deferred Income Taxes			2.5	7.2
Amount of Postretirement Expense Less Than Funding			(4.0)	(5.9)
Equity in Net Earnings of Subsidiaries	0.0	0.0	0.0	0.0
Other, Net			0.4	(1.3)
Changes in Operating Assets and Liabilities			(46.4)	69.9
Net Cash Provided by Operating Activities			10.1	126.9
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Spending			(40.2)	(33.0)
Packaging Machinery Spending			0.0	0.0
Acquisition of Businesses, Net of Cash Acquired			(158.8)	(113.6)
Other, Net			0.0	2.9
Net Cash Provided by (Used in) Investing Activities			(199.0)	(143.7)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchase of Common Stock			0.0	0.0
Payments on Debt			0.0	0.0
Proceeds from Issuance of Debt			0.0
Borrowings under Revolving Credit Facilities			57.4	34.3
Payments on Revolving Credit Facilities			(45.6)	(57.7)
Debt Issuance Costs			0.0
Dividends Paid			0.0	0.0
Repurchase of Common Stock related to Share-Based Payments			0.0	0.0
Other, Net			160.0	0.0
Net Cash (Used in) Provided by Financing Activities			171.8	(23.4)
Effect of Exchange Rate Changes on Cash			0.8	(4.4)
Net Increase (Decrease) in Cash and Cash Equivalents			(16.3)	(44.6)
Cash and Cash Equivalents at Beginning of Period			54.8	79.6
CASH AND CASH EQUIVALENTS AT END OF PERIOD	38.5	35.0	38.5	35.0
Consolidating Eliminations
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	(62.6)	(65.2)	(211.2)	(194.6)
Non-cash Items Included in Net Income:
Depreciation and Amortization			0.0	0.0
Deferred Income Taxes			0.0	0.0
Amount of Postretirement Expense Less Than Funding			0.0	0.0
Equity in Net Earnings of Subsidiaries	62.6	65.2	211.2	194.6
Other, Net			0.0	0.0
Changes in Operating Assets and Liabilities			0.0	0.0
Net Cash Provided by Operating Activities			0.0	0.0
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital Spending			0.0	0.0
Packaging Machinery Spending			0.0	0.0
Acquisition of Businesses, Net of Cash Acquired			0.0	0.0
Other, Net			(5.5)	(77.2)
Net Cash Provided by (Used in) Investing Activities			(5.5)	(77.2)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repurchase of Common Stock			0.0	0.0
Payments on Debt			0.0	0.0
Proceeds from Issuance of Debt			0.0
Borrowings under Revolving Credit Facilities			0.0	0.0
Payments on Revolving Credit Facilities			0.0	0.0
Debt Issuance Costs			0.0
Dividends Paid			0.0	0.0
Repurchase of Common Stock related to Share-Based Payments			0.0	0.0
Other, Net			5.5	77.2
Net Cash (Used in) Provided by Financing Activities			5.5	77.2
Effect of Exchange Rate Changes on Cash			0.0	0.0
Net Increase (Decrease) in Cash and Cash Equivalents			0.0	0.0
Cash and Cash Equivalents at Beginning of Period			0.0	0.0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 0.0	$ 0.0	$ 0.0	$ 0.0