Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
OPERATING ACTIVITIES
Net earnings	$ 7,900,000	$ 107,200,000	$ 44,900,000
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	230,700,000	232,500,000	277,100,000
Employee stock ownership plan contribution	22,300,000	0	0
Impairment charges	26,500,000	12,000,000	26,800,000
Amortization of debt issuance costs and original issue discount	3,500,000	3,500,000	4,200,000
Loss (gain) on debt extinguishment	0	2,600,000	(14,100,000)
Stock-based compensation	15,600,000	16,400,000	15,200,000
Gain on the sale or disposal of property, plant and equipment	(17,800,000)	(6,900,000)	(9,000,000)
Loss on the sale of a business	0	7,700,000	0
Gain from property insurance claims	(18,300,000)	(5,000,000)	0
Settlement loss on pension benefit plans	0	800,000	7,000,000
Deferred income taxes	(14,500,000)	(22,500,000)	(26,600,000)
Equity in (earnings) loss of unconsolidated entity	(1,000,000)	0	1,400,000
Changes in operating assets and liabilities—net of acquisitions:
Receivables	49,400,000	8,700,000	84,800,000
Inventories	(54,300,000)	13,100,000	12,700,000
Prepaid expenses and other current assets	1,700,000	3,800,000	(18,000,000)
Accounts payable and accrued liabilities	23,200,000	9,900,000	(16,100,000)
Other	(14,300,000)	(39,800,000)	(36,700,000)
Net cash provided by operating activities	260,600,000	344,000,000	353,600,000
INVESTING ACTIVITIES
Purchases of property, plant and equipment	(96,300,000)	(85,900,000)	(106,100,000)
Cost investment in unconsolidated entities	0	0	(9,900,000)
Proceeds from the sale of property, plant and equipment	32,700,000	23,900,000	25,900,000
Proceeds from the sale of a business	0	14,100,000	0
Proceeds from property insurance claims	14,500,000	8,000,000	0
Proceeds from the sale of investments	0	0	1,300,000
Loan to an unconsolidated entity	0	(7,300,000)	0
Acquisition of businesses—net of cash acquired (Note 3)	(71,400,000)	0	0
Net cash used in investing activities	(120,500,000)	(47,200,000)	(88,800,000)
FINANCING ACTIVITIES
Proceeds from issuance of long-term debt	7,800,000	375,000,000	19,700,000
Payments of long-term debt	(33,200,000)	(522,900,000)	(192,000,000)
Payments of capital lease obligations	(6,300,000)	(7,600,000)	(9,500,000)
Borrowings on revolving credit facilities	2,563,700,000	718,500,000	871,900,000
Payments on revolving credit facilities	(2,561,100,000)	(736,000,000)	(918,000,000)
Payments of debt issuance costs and financing fees	0	(4,700,000)	(100,000)
Purchases of treasury stock	(36,700,000)	(3,800,000)	(8,800,000)
Proceeds from stock options exercised	4,200,000	2,600,000	30,300,000
Equity awards redeemed to pay employees' tax obligations	(9,000,000)	(6,000,000)	(1,400,000)
Payment of cash dividends	(62,900,000)	(62,500,000)	(61,100,000)
Other financing activities	0	(4,300,000)	(300,000)
Net cash used in financing activities	(133,500,000)	(251,700,000)	(269,300,000)
Effect of exchange rates on cash and cash equivalents	(1,500,000)	100,000	(600,000)
Net increase (decrease) in cash and cash equivalents	5,100,000	45,200,000	(5,100,000)
Cash and cash equivalents at beginning of year	64,400,000	19,200,000	24,300,000
Cash and cash equivalents at end of year	$ 69,500,000	$ 64,400,000	$ 19,200,000