Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating activities
Net income	$ 131.7	$ 95.5	$ 85.9
Gain on revaluation of previously held joint-venture equity interest	0.0	(28.9)	0.0
Amortization of inventory step-up	0.9	0.4	0.0
(Gain) loss on disposal of assets	(1.3)	(0.3)	0.1
Deferred income tax (benefit) expense	(45.2)	6.0	27.4
Insurance claims, net of proceeds	(0.4)	0.0	0.0
Depreciation	35.6	30.4	32.4
Amortization of debt issuance costs	2.9	3.8	3.5
Amortization of intangibles	35.6	21.6	19.6
Stock-based compensation	17.0	19.4	16.0
Loss on debt extinguishment	0.0	29.9	1.9
Other non-cash items	0.0	0.1	0.0
Equity in earnings of joint-venture, net of dividends received	0.0	(1.6)	(3.8)
Changes in balance sheet items:
Accounts receivable	10.2	13.4	(3.9)
Inventories	2.5	16.7	9.8
Other assets	4.6	5.5	1.2
Accounts payable	(18.7)	(19.3)	(2.6)
Accrued expenses and other liabilities	(8.3)	(31.2)	(19.2)
Accrued income taxes	37.8	5.7	2.9
Net cash provided by operating activities	204.9	167.1	171.2
Investing activities
Additions to property, plant and equipment	(31.0)	(18.5)	(27.6)
Proceeds from the disposition of assets	4.2	0.7	2.8
Cost of acquisitions, net of cash acquired	(292.3)	(88.8)	0.0
Other	0.0	0.2	0.2
Net cash used by investing activities	(319.1)	(106.4)	(24.6)
Financing activities
Proceeds from long-term borrowings	484.1	587.4	300.0
Repayments of long-term debt	(296.5)	(685.1)	(370.1)
Borrowings (repayments) of notes payable, net	0.0	51.5	(0.8)
Payment for debt premium	0.0	(25.0)	0.0
Payments for debt issuance costs	(3.6)	(6.9)	(1.7)
Repurchases of common stock	(36.6)	0.0	(60.0)
Payments related to tax withholding for stock-based compensation	(9.4)	(5.1)	(5.9)
Proceeds from the exercise of stock options	4.2	6.8	0.7
Net cash provided (used) by financing activities	142.2	(76.4)	(137.8)
Effect of foreign exchange rate changes on cash and cash equivalents	6.0	3.2	(6.6)
Net increase (decrease) in cash and cash equivalents	34.0	(12.5)	2.2
Cash and cash equivalents
Beginning of the period	42.9	55.4	53.2
End of the period	76.9	42.9	55.4
Supplemental Cash Flow Information [Abstract]
Interest	38.0	50.1	41.0
Income taxes	$ 34.8	$ 16.9	$ 16.9