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 earnings	$ 859.1	$ 790.9	$ 751.9
Adjustments to reconcile net earnings to net cash provided by operating activities, net of acquisitions:
Depreciation of property and equipment	153.3	144.6	134.1
Gain on sale of property and equipment	(1.4)	(1.2)	(0.5)
Bad debt expense	7.5	5.5	8.1
Deferred income taxes	2.9	15.0	33.8
Stock-based compensation	5.7	5.7	5.1
Amortization of intangible assets	9.1	4.1	4.1
Changes in operating assets and liabilities, net of acquisitions:
Trade accounts receivable	(29.7)	(30.4)	(120.3)
Inventories	36.0	(84.4)	(193.3)
Other current assets	17.1	(10.4)	(28.9)
Accounts payable	14.2	(0.8)	46.1
Accrued expenses	20.6	10.7	46.8
Income taxes	10.0	(7.7)	(15.5)
Other	(2.6)	1.1	2.7
Net cash provided by operating activities	1,101.8	842.7	674.2
Cash flows from investing activities:
Purchases of property and equipment	(168.1)	(246.4)	(176.3)
Proceeds from sale of property and equipment	10.6	6.6	9.5
Cash paid for acquisitions	(125.0)	0.0	(3.7)
Other	0.8	0.1	(3.4)
Net cash used in investing activities	(281.7)	(239.7)	(173.9)
Cash flows from financing activities:
Proceeds from debt obligations	1,000.0	910.0	980.0
Payments against debt obligations	(940.0)	(1,065.0)	(895.0)
Proceeds from exercise of stock options	41.0	58.5	13.4
Purchases of common stock	(52.0)	0.0	(103.0)
Payments of dividends	(803.4)	(498.6)	(441.9)
Net cash used in financing activities	(754.4)	(595.1)	(446.5)
Effect of exchange rate changes on cash and cash equivalents	5.1	(0.2)	(3.5)
Net increase in cash and cash equivalents	70.8	7.7	50.3
Cash and cash equivalents at beginning of year	174.9	167.2	116.9
Cash and cash equivalents at end of year	245.7	174.9	167.2
Supplemental information:
Cash paid for interest	8.4	13.9	12.6
Net cash paid for income taxes	$ 260.1	$ 242.7	$ 215.3