CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating activities:
Net income	$ 171.1	$ 113.4
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization expense	54.1	55.2
Deferred income tax provision	1.1	0.2
Gain on sales of property, plant and equipment	(0.1)	(3.9)
Stock-based compensation expense	6.4	5.5
Other	3.0	4.0
Changes in operating assets and liabilities (excluding effect of businesses acquired):
Accounts receivable	(230.6)	(186.7)
Inventories	(169.8)	(146.5)
Prepaid expenses and other assets	15.9	9.2
Accounts payable and other liabilities	162.2	128.9
Net cash provided by (used in) operating activities	13.3	(20.7)
Investing activities:
Purchases of property, plant and equipment	(41.8)	(34.1)
Acquisitions, net of cash acquired	(39.6)	(1.3)
Other	4.1	3.4
Net cash used in investing activities	(77.3)	(32.0)
Financing activities:
Net short-term debt borrowings (repayments)	1.0	(3.8)
Proceeds from long-term debt borrowings	398.0	339.0
Principal payments on long-term debt	(253.7)	(242.1)
Dividends and dividend equivalents paid	(38.5)	(33.7)
Exercise of stock options	2.8	2.8
Share repurchases	(49.3)
Other	(5.4)	(1.8)
Net cash provided by financing activities	54.9	60.4
Effect of exchange rate changes on cash and cash equivalents	0.1	3.3
(Decrease) increase in cash and cash equivalents	(9.0)	11.0
Cash and cash equivalents at beginning of year	154.4	122.8
Cash and cash equivalents at end of period	145.4	133.8
Supplemental cash flow information:
Interest paid during the period	9.0	8.1
Income taxes paid during the period, net	$ 9.0	$ 3.0