Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash Flows from Operating Activities
Net Income	$ 122.1	$ 144.9	$ 143.7
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	52.8	50.5	49.6
Non-cash operating lease expense	33.8	30.1
Deferred income taxes	(10.2)	(3.7)	3.4
Net gains on disposal of assets	(3.0)	(1.5)
Losses on impairment of assets	0.3	0.3	0.3
Non-cash pension settlement charge	27.7
Net income attributable to noncontrolling interests	(0.3)	(0.4)	(0.4)
Changes in assets and liabilities:
Trade receivables	(5.2)	92.2	(125.4)
Merchandise inventory	68.0	4.5	(101.9)
Other current assets	(4.9)	2.4	2.1
Other non-current assets	(1.1)	(1.7)	(9.0)
Trade accounts payable	48.1	(62.8)	59.7
Accrued payroll and benefit costs	(30.2)	(7.1)	38.8
Other current liabilities	25.1	5.8	5.6
Other non-current liabilities	(21.3)	(4.1)	(24.4)
Total adjustments to net income	179.6	104.5	(101.6)
Net cash provided by operating activities	301.7	249.4	42.1
Cash Flows from Investing Activities
Proceeds from disposal of property	7.9	3.7	0.7
Capital expenditures for property	(31.1)	(43.1)	(43.0)
Acquisition of business, net of cash acquired	(27.2)
Net cash used by investing activities	(50.4)	(39.4)	(42.3)
Cash Flows from Financing Activities
Net decrease in short-term borrowings	(88.0)	(97.0)	65.4
Principal payments under finance arrangements	(3.9)	(3.7)	(4.0)
Sale of common stock	19.1	18.5	17.8
Purchases of common stock	(16.5)	(19.2)	(15.7)
Sales of noncontrolling interests’ common stock		0.8
Purchases of noncontrolling interests’ common stock	(0.9)	(0.3)	(0.3)
Dividends paid	(90.7)	(107.2)	(46.9)
Net cash used by financing activities	(180.9)	(208.1)	16.3
Net Increase in Cash	70.4	1.9	16.1
Cash, Beginning of Year	60.8	58.9	42.8
Cash, End of Period	131.2	60.8	58.9
Non-cash Investing and Financing Activities:
Acquisitions of equipment under finance leases	0.3	2.0	3.1
Acquisitions of assets under operating leases	35.3	55.9
Acquisition of software and maintenance under financing arrangement			5.0
Cash Paid During the Year for:
Interest, net of amounts capitalized	3.8	6.1	6.3
Income taxes, net of refunds	$ 55.3	$ 60.7	$ 38.3