Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities
Net income	$ 250.4	$ 173.9
Reconciliation of net income to net cash provided by operating activities:
Depreciation	61.5	55.9
Amortization	59.2	46.1
Impairment charges	0.0	141.5
Stock-based compensation, net of tax benefit	11.9	(3.1)
Other operating activities, net	3.5	(21.6)
Changes in assets and liabilities, excluding effects of acquisitions:
Receivables	(155.3)	(93.5)
Inventories	(45.9)	(20.6)
Prepaid expenses and other assets	1.4	1.0
Accounts payable	61.3	43.3
Accrued expenses	39.9	25.3
Deferred revenues	15.4	7.4
Other long-term liabilities	(3.7)	(0.5)
Net cash provided by operating activities	299.6	355.1
Investing activities
Acquisitions, net of cash acquired	(280.0)	(103.1)
Capital expenditures	(105.8)	(77.3)
Other investing activities, net	0.2	0.8
Net cash used in investing activities	(385.6)	(179.6)
Financing activities
Repayments of borrowings	0.0	(150.0)
Proceeds from revolving credit facility	491.0	0.0
Repayments of revolving credit facility	(306.0)	0.0
Repurchases of common stock	(266.4)	(61.3)
Dividends paid	(69.0)	(61.8)
Withholding tax paid related to stock-based compensation	(8.2)	(4.8)
Proceeds from exercise of stock options	4.1	46.2
Net cash used in financing activities	(154.5)	(231.7)
Effect of foreign currency exchange rate changes on cash and cash equivalents	2.8	0.9
Change in cash and cash equivalents	(237.7)	(55.3)
Cash and cash equivalents
Beginning of period	385.3	410.7
End of period	$ 147.6	$ 355.4