Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating activities
Net income	$ 164.1	$ 183.7
Reconciliation of net income to net cash provided by operating activities:
Depreciation	40.2	36.9
Amortization	38.9	30.5
Stock-based compensation, net of tax benefit	7.3	(5.2)
Other operating activities, net	6.4	(1.5)
Changes in assets and liabilities, excluding effects of acquisitions:
Receivables	(167.6)	(120.2)
Inventories	(38.7)	(19.3)
Prepaid expenses and other assets	6.4	4.1
Accounts payable	71.7	61.3
Accrued expenses	(6.8)	5.9
Deferred revenues	13.1	4.1
Other long-term liabilities	(0.3)	(0.4)
Net cash provided by operating activities	134.7	179.9
Investing activities
Capital expenditures	(66.1)	(45.9)
Acquisitions, net of cash acquired	(225.9)	(103.1)
Other investing activities, net	0.1	0.1
Net cash used in investing activities	(291.9)	(148.9)
Financing activities
Proceeds from revolving credit facility	263.0	0.0
Repayment of revolving credit facility	(153.0)	0.0
Dividends paid	(45.8)	(39.0)
Proceeds from exercise of stock options	3.5	39.8
Withholding tax paid related to stock-based compensation	(8.1)	(4.7)
Repurchases of common stock	(150.0)	(40.9)
Net cash used in financing activities	(90.4)	(44.8)
Effect of foreign currency exchange rate changes on cash and cash equivalents	2.1	1.0
Change in cash and cash equivalents	(245.5)	(12.8)
Cash and cash equivalents
Beginning of period	385.3	410.7
End of period	$ 139.8	$ 397.9