Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating activities
Net income	$ 250.1	$ 319.7	$ 251.3
Reconciliation of net income to cash flows provided by operating activities:
Depreciation	75.1	73.5	64.7
Amortization	62.7	55.8	39.3
Impairment charges	141.5
Stock-based compensation, net of tax benefit	(2.6)	2.7	3.3
Deferred taxes	(25.0)	(15.8)	(9.9)
Other operating activities, net	(6.0)	(1.3)	(2.4)
Changes in assets and liabilities, excluding effects of acquisitions:
Receivables	0.3	(11.8)	(18.1)
Inventories	(12.2)	23.0	(27.7)
Prepaid expenses and other assets	(9.2)	6.7	(5.5)
Accounts payable	21.6	(2.9)	(5.1)
Accrued expenses and deferred revenues	34.8	78.4	14.5
Other long-term liabilities	0.1	1.2	(8.5)
Net cash provided by operating activities	531.2	529.2	295.9
Investing activities
Capital expenditures	(108.8)	(72.1)	(118.8)
Acquisitions, net of cash acquired	(185.5)	(598.9)	(194.0)
Other investing activities, net	0.9	0.2	15.0
Net cash used in investing activities	(293.4)	(670.8)	(297.8)
Financing activities
Repayments of borrowings	(150.0)	(1.5)	(1.5)
Dividends paid	(84.5)	(72.3)	(61.2)
Proceeds from exercise of stock options, net	48.4	39.4	42.5
Repurchases of common stock	(75.0)	(137.2)
Other financing activities, net		(1.4)
Net cash used in financing activities	(261.1)	(173.0)	(20.2)
Effect of foreign currency exchange rate changes on cash and cash equivalents	(2.1)	(5.5)	(1.6)
Change in cash and cash equivalents	(25.4)	(320.1)	(23.7)
Cash and cash equivalents
Beginning of period	410.7	730.8	754.5
End of period	$ 385.3	$ 410.7	$ 730.8