Condensed Consolidating Financial Statements (Balance Sheets) (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 46,100,000	$ 46,300,000	$ 46,100,000	$ 46,100,000	$ 68,200,000
Short-term Investments	2,400,000	0
Accounts and notes receivable, net	622,200,000	472,700,000
Inventories, net	585,300,000	509,800,000
Other assets	61,300,000	60,600,000
Total current assets	1,317,300,000	1,089,400,000
Property, plant and equipment, net	418,800,000	408,300,000
Right-of-use assets from operating leases	172,900,000	0
Goodwill	186,400,000	186,600,000
Investment in subsidiaries	0	0
Deferred income taxes	47,600,000	67,000,000.0
Other assets, net	71,800,000	65,900,000
Intercompany receivables (payables), net	0	0
Total assets	2,214,800,000	1,817,200,000
Current Liabilities:
Current maturities of long-term debt	394,300,000	300,800,000
Current operating lease liabilities	51,600,000	0
Accounts payable	393,000,000.0	433,300,000
Accrued expenses	271,000,000.0	272,300,000
Income taxes (receivable) payable	0	2,100,000
Total current liabilities	1,109,900,000	1,008,500,000
Long-term debt	1,056,800,000	740,500,000
Long-term operating lease liabilities	123,000,000.0	0
Pensions	72,500,000	82,800,000
Other liabilities	129,900,000	135,000,000.0
Total liabilities	2,492,100,000	1,966,800,000
Commitments and contingencies
Total stockholders' (deficit) equity	(277,300,000)	(149,600,000)
Total liabilities and stockholders' deficit	2,214,800,000	1,817,200,000
Eliminations [Member]
Current Assets:
Cash and cash equivalents	0	0		0	0
Short-term Investments	0
Accounts and notes receivable, net	0	0
Inventories, net	(2,200,000)	(5,500,000)
Other assets	(34,300,000)	(33,600,000)
Total current assets	(36,500,000)	(39,100,000)
Property, plant and equipment, net	0	(3,600,000)
Right-of-use assets from operating leases	0
Goodwill	0	0
Investment in subsidiaries	(2,124,000,000.0)	(1,669,200,000)
Deferred income taxes	(12,200,000)	(12,200,000)
Other assets, net	14,200,000	(1,500,000)
Intercompany receivables (payables), net	(119,900,000)	(102,900,000)
Total assets	(2,278,400,000)	(1,828,500,000)
Current Liabilities:
Current maturities of long-term debt	0	0
Current operating lease liabilities	0
Accounts payable	0	0
Accrued expenses	0	0
Income taxes (receivable) payable	(50,800,000)	(50,800,000)
Total current liabilities	(50,800,000)	(50,800,000)
Long-term debt	0	0
Long-term operating lease liabilities	0
Pensions	0	0
Other liabilities	0	0
Total liabilities	(50,800,000)	(50,800,000)
Commitments and contingencies
Total stockholders' (deficit) equity	(2,227,600,000)	(1,777,700,000)
Total liabilities and stockholders' deficit	(2,278,400,000)	(1,828,500,000)
Parent [Member]
Current Assets:
Cash and cash equivalents	1,400,000	1,800,000		1,400,000	1,600,000
Short-term Investments	0
Accounts and notes receivable, net	0	0
Inventories, net	0	0
Other assets	3,400,000	3,300,000
Total current assets	4,800,000	5,100,000
Property, plant and equipment, net	0	0
Right-of-use assets from operating leases	0
Goodwill	0	0
Investment in subsidiaries	1,651,700,000	1,311,900,000
Deferred income taxes	(12,200,000)	1,400,000
Other assets, net	1,400,000	1,500,000
Intercompany receivables (payables), net	(872,400,000)	(715,500,000)
Total assets	773,300,000	604,400,000
Current Liabilities:
Current maturities of long-term debt	21,900,000	29,400,000
Current operating lease liabilities	0
Accounts payable	29,700,000	25,500,000
Accrued expenses	11,200,000	12,100,000
Income taxes (receivable) payable	(45,700,000)	(38,500,000)
Total current liabilities	17,100,000	28,500,000
Long-term debt	1,033,200,000	724,900,000
Long-term operating lease liabilities	0
Pensions	0	0
Other liabilities	300,000	600,000
Total liabilities	1,050,600,000	754,000,000.0
Commitments and contingencies
Total stockholders' (deficit) equity	(277,300,000)	(149,600,000)
Total liabilities and stockholders' deficit	773,300,000	604,400,000
Guarantor Subsidiaries [Member]
Current Assets:
Cash and cash equivalents	26,000,000.0	15,400,000		24,000,000.0	28,000,000.0
Short-term Investments	0
Accounts and notes receivable, net	72,000,000.0	44,300,000
Inventories, net	509,200,000	411,400,000
Other assets	42,800,000	36,200,000
Total current assets	650,000,000.0	507,300,000
Property, plant and equipment, net	365,400,000	293,300,000
Right-of-use assets from operating leases	149,000,000.0
Goodwill	166,100,000	166,100,000
Investment in subsidiaries	422,100,000	357,800,000
Deferred income taxes	49,500,000	54,400,000
Other assets, net	54,600,000	48,100,000
Intercompany receivables (payables), net	857,500,000	675,800,000
Total assets	2,714,200,000	2,102,800,000
Current Liabilities:
Current maturities of long-term debt	5,800,000	2,800,000
Current operating lease liabilities	44,400,000
Accounts payable	317,600,000	295,700,000
Accrued expenses	219,100,000	213,800,000
Income taxes (receivable) payable	52,300,000	40,600,000
Total current liabilities	639,200,000	552,900,000
Long-term debt	21,700,000	15,000,000.0
Long-term operating lease liabilities	106,100,000
Pensions	64,900,000	75,100,000
Other liabilities	122,700,000	126,400,000
Total liabilities	954,600,000	769,400,000
Commitments and contingencies
Total stockholders' (deficit) equity	1,759,600,000	1,333,400,000
Total liabilities and stockholders' deficit	2,714,200,000	2,102,800,000
Non-Guarantor Subsidiaries [Member]
Current Assets:
Cash and cash equivalents	18,700,000	29,100,000		$ 20,700,000	$ 38,600,000
Short-term Investments	2,400,000
Accounts and notes receivable, net	550,200,000	428,400,000
Inventories, net	78,300,000	103,900,000
Other assets	49,400,000	54,700,000
Total current assets	699,000,000.0	616,100,000
Property, plant and equipment, net	53,400,000	118,600,000
Right-of-use assets from operating leases	23,900,000
Goodwill	20,300,000	20,500,000
Investment in subsidiaries	50,200,000	(500,000)
Deferred income taxes	22,500,000	23,400,000
Other assets, net	1,600,000	17,800,000
Intercompany receivables (payables), net	134,800,000	142,600,000
Total assets	1,005,700,000	938,500,000
Current Liabilities:
Current maturities of long-term debt	366,600,000	268,600,000
Current operating lease liabilities	7,200,000
Accounts payable	45,700,000	112,100,000
Accrued expenses	40,700,000	46,400,000
Income taxes (receivable) payable	44,200,000	50,800,000
Total current liabilities	504,400,000	477,900,000
Long-term debt	1,900,000	600,000
Long-term operating lease liabilities	16,900,000
Pensions	7,600,000	7,700,000
Other liabilities	6,900,000	8,000,000.0
Total liabilities	537,700,000	494,200,000
Commitments and contingencies
Total stockholders' (deficit) equity	468,000,000.0	444,300,000
Total liabilities and stockholders' deficit	$ 1,005,700,000	$ 938,500,000