Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 551.2	$ 483.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	197.5	198.7
Equity-based compensation expense	37.7	29.9
Deferred income taxes	(33.5)	(39.2)
Other	25.2	8.7
Changes in assets and liabilities:
Accounts receivable	(171.8)	(334.3)
Merchandise inventory	(151.1)	(72.1)
Other assets	(82.2)	(66.1)
Accounts payable-trade	264.0	300.6
Other liabilities	45.3	92.4
Net cash provided by operating activities	682.3	602.3
Cash flows used in investing activities:
Capital expenditures	(75.0)	(53.4)
Acquisition of business, net of cash acquired	(75.0)	0.0
Net cash used in investing activities	(150.0)	(53.4)
Cash flows used in financing activities:
Proceeds from borrowings under revolving credit facility	1,860.5	688.9
Repayments of borrowings under revolving credit facility	(1,834.5)	(681.9)
Repayments of long-term debt	(19.7)	(18.2)
Proceeds from issuance of long-term debt	600.0	0.0
Payments to extinguish long-term debt	(538.1)	0.0
Net change in accounts payable-inventory financing	(17.4)	(90.1)
Repurchases of common stock	(493.3)	(232.5)
Payment of incentive compensation plan withholding taxes	(21.3)	(27.1)
Dividend payments	(128.9)	(95.5)
Other	24.2	21.1
Net cash used in financing activities	(568.5)	(435.3)
Effect of exchange rate changes on cash and cash equivalents	(2.7)	(2.7)
Net (decrease) increase in cash and cash equivalents	(38.9)	110.9
Cash and cash equivalents—beginning of period	205.8	144.2
Cash and cash equivalents—end of period	166.9	255.1
Supplementary disclosure of cash flow information:
Interest paid	(124.8)	(117.4)
Taxes paid, net	$ (203.0)	$ (200.5)