CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 661.8	$ 346.2	$ 241.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	116.9	104.7	100.0
Amortization	5.4	4.4	3.4
Stock-based compensation	37.5	34.0	24.4
Non-cash restructuring charges	0.0	0.0	2.3
Pension settlement charge	1.8	3.7	3.5
Contingent consideration payments in excess of acquisition-date liability	(1.4)	(0.9)	(0.5)
Fixed asset impairments and sale of equipment, net	1.3	7.7	0.8
Deferred income taxes	(42.9)	(5.8)	15.3
Pension and other retirement plans, net	14.8	4.6	(2.6)
Equity in undistributed earnings of affiliates, net of dividends	(17.4)	(15.8)	(6.7)
Changes in assets and liabilities:
Increase in accounts receivable	(123.5)	(46.6)	(33.3)
Increase in inventories	(86.5)	(73.7)	(18.6)
(Increase) decrease in other current assets	(7.3)	5.5	2.6
Increase in accounts payable	16.8	36.6	25.3
Changes in other assets and liabilities	6.7	67.9	9.6
Net cash provided by operating activities	584.0	472.5	367.2
Cash flows from investing activities:
Capital expenditures	(253.4)	(174.4)	(126.4)
Purchase of investment in affiliated companies	0.0	0.0	(85.1)
Acquisition of business	(2.2)	0.0	(18.9)
Other, net	2.5	(5.1)	2.4
Net cash used in investing activities	(253.1)	(179.5)	(228.0)
Cash flows from financing activities:
Borrowings under revolving credit agreements	0.0	0.0	108.5
Repayments under revolving credit agreements	0.0	0.0	(136.3)
Issuance of long-term debt	0.0	0.0	90.0
Debt issuance cost	0.0	0.0	(1.2)
Repayments of long-term debt	(2.2)	(2.3)	(0.1)
Dividend payments	(51.1)	(48.1)	(45.1)
Proceeds from stock-based compensation awards	29.4	28.3	27.3
Employee stock purchase plan contributions	7.7	6.4	5.4
Shares purchased under share repurchase programs	(137.1)	(115.5)	(83.1)
Shares repurchased for employee tax withholdings	(14.8)	(5.9)	(2.2)
Net cash used in financing activities	(168.1)	(137.1)	(36.8)
Effect of exchange rates on cash	(15.7)	20.5	(0.7)
Net increase in cash and cash equivalents	147.1	176.4	101.7
Cash, including cash equivalents at beginning of period	615.5	439.1	337.4
Cash, including cash equivalents at end of period	762.6	615.5	439.1
Supplemental cash flow information:
Interest paid, net of amounts capitalized	8.0	8.1	8.6
Income taxes paid, net	171.8	48.4	47.5
Accrued capital expenditures	41.1	31.3	17.0
Dividends declared, not paid	13.4	12.6	11.8
Purchase of investment in affiliated companies, treasury stock	$ 0.0	$ 0.0	$ 4.9