CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Operating activities:
Net income attributable to common shareholders	$ 108.4	$ 62.8
Gain on sale of property	(12.7)	0.0
Depreciation and amortization	31.6	29.9
Stock-based compensation expense	6.3	5.8
Defined benefit plans and postretirement credit	(1.7)	(1.8)
Deferred income taxes	0.3	6.1
Cash used for operating working capital	(54.8)	(123.7)
Defined benefit plans and postretirement contributions	(15.8)	(1.5)
Environmental payments, net of reimbursements	(1.5)	(2.7)
Asbestos related payments, net of insurance recoveries	(10.8)	(11.7)
Other	0.9	1.3
Total provided by (used for) operating activities	50.2	(35.5)
Investing activities:
Payment for acquisition - net of cash acquired	0.0	(172.0)
Proceeds from disposition of capital assets	14.5	2.4
Capital expenditures	(4.9)	(7.8)
Purchase of marketable securities	(10.0)	0.0
Proceeds from sale of marketable securities	30.0	0.0
Total provided by (used for) investing activities	29.6	(177.4)
Financing activities:
Dividends paid	(25.0)	(25.5)
Reacquisition of shares on open market	0.0	(70.0)
Stock options exercised - net of shares reacquired	7.2	0.1
Repayments of commercial paper with maturities greater than 90 days	(27.1)	0.0
Proceeds from issuance of commercial paper with maturities greater than 90 days	0.0	170.0
Net proceeds from issuance of commercial paper with maturities of 90 days or less	0.0	14.5
Net borrowings under revolving credit facility	0.0	45.2
Total (used for) provided by financing activities	(44.9)	134.3
Effect of exchange rates on cash and cash equivalents	(7.5)	(12.5)
Increase (decrease) in cash and cash equivalents	27.4	(91.1)
Cash and cash equivalents at beginning of period	551.0	393.9	$ 393.9
Cash and cash equivalents at end of period	578.4	302.8	$ 551.0
Detail of cash used for operating working capital:
Accounts receivable	(55.1)	12.0
Inventories	(1.6)	(31.1)
Other current assets	(19.0)	(17.1)
Accounts payable	16.9	(61.1)
Accrued liabilities	(18.7)	(26.5)
U.S. and foreign taxes on income	22.7	0.1
Cash used for operating working capital	(54.8)	(123.7)
Supplemental disclosure of cash flow information:
Interest paid	9.9	8.0
Income taxes paid	$ 5.7	$ 11.3