Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net earnings	$ 269.6	$ 210.6
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation of property and equipment	41.2	39.3
Loss (gain) on sale of property and equipment	3.5	(0.6)
Bad debt expense	(0.3)	(0.1)
Deferred income taxes	1.0	0.3
Stock-based compensation	1.5	1.5
Amortization of intangible assets	2.7	2.7
Changes in operating assets and liabilities:
Trade accounts receivable	(169.9)	(82.1)
Inventories	(76.4)	31.1
Other current assets	60.7	16.3
Accounts payable	56.8	8.1
Accrued expenses	(30.1)	(6.3)
Income taxes	69.6	53.9
Other	0.1	0.1
Net cash provided by operating activities	230.0	274.8
Cash flows from investing activities:
Purchases of property and equipment	(35.5)	(32.7)
Proceeds from sale of property and equipment	2.4	2.7
Other	(0.1)	0.1
Net cash used in investing activities	(33.2)	(29.9)
Cash flows from financing activities:
Proceeds from debt obligations	235.0	110.0
Payments against debt obligations	(260.0)	(110.0)
Proceeds from exercise of stock options	3.9	6.6
Payments of dividends	(178.4)	(160.8)
Net cash used in financing activities	(199.5)	(154.2)
Effect of exchange rate changes on cash and cash equivalents	0.7	(2.5)
Net (decrease) increase in cash and cash equivalents	(2.0)	88.2
Cash and cash equivalents at beginning of period	236.2	245.7
Cash and cash equivalents at end of period	234.2	333.9
Supplemental information:
Cash paid for interest	2.3	2.4
Net cash paid for income taxes	15.2	12.4
Leased assets obtained in exchange for new operating lease liabilities	$ 23.9	$ 30.9