Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 349.5	$ 300.0
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	129.3	132.9
Equity-based compensation expense	24.9	19.1
Deferred income taxes	(22.5)	(28.1)
Other	6.4	5.1
Changes in assets and liabilities:
Accounts receivable	(230.1)	(295.2)
Merchandise inventory	(197.3)	(167.7)
Other assets	(109.6)	(62.2)
Accounts payable-trade	414.9	386.8
Other liabilities	49.0	41.6
Net cash provided by operating activities	414.5	332.3
Cash flows used in investing activities:
Capital expenditures	(43.9)	(33.6)
Acquisition of business, net of cash acquired	(75.0)	0.0
Net cash used in investing activities	(118.9)	(33.6)
Cash flows used in financing activities:
Proceeds from borrowings under revolving credit facility	891.0	488.1
Repayments of borrowings under revolving credit facility	(815.0)	(474.4)
Repayments of long-term debt	(9.6)	(7.5)
Net change in accounts payable-inventory financing	36.3	(110.4)
Repurchases of common stock	(332.2)	(176.4)
Payment of incentive compensation plan withholding taxes	(11.6)	(8.7)
Dividend payments	(86.3)	(63.8)
Other	22.2	14.9
Net cash used in financing activities	(305.2)	(338.2)
Effect of exchange rate changes on cash and cash equivalents	(1.7)	(4.0)
Net decrease in cash and cash equivalents	(11.3)	(43.5)
Cash and cash equivalents—beginning of period	205.8	144.2
Cash and cash equivalents—end of period	194.5	100.7
Supplementary disclosure of cash flow information:
Interest paid	(76.0)	(74.5)
Taxes paid, net	$ (115.2)	$ (118.4)