CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 19.6	$ 27.0
Depreciation	12.7	14.9
Amortization of operating lease right-of-use assets	1.7	1.6
Deferred income taxes	0.2	(0.9)
Benefit plan expense greater than cash funding	3.7	3.0
Marketable equity securities	(0.8)	1.5
Contributions to TiO2 manufacturing joint venture, net	(3.4)	(2.2)
Other, net	0.1	(1.1)
Change in assets and liabilities:
Accounts and other receivables, net	(23.5)	(38.7)
Inventories, net	35.6	3.3
Prepaid expenses	5.0	3.6
Accounts payable and accrued liabilities	0.5	(30.5)
Income taxes	0.9	9.4
Accounts with affiliates	4.2	(1.5)
Other, net	0.2	0.8
Net cash provided by (used in) operating activities	56.7	(9.8)
Cash flows from investing activities:
Capital expenditures	(10.8)	(15.3)
Proceeds from insurance settlement		1.5
Net cash used in investing activities	(10.8)	(13.8)
Cash flows from financing activities:
Payments on long-term debt	(0.2)	(0.1)
Dividends paid	(20.8)	(20.8)
Treasury stock acquired		(1.0)
Net cash used in financing activities	(21.0)	(21.9)
Cash, cash equivalents and restricted cash - net change from:
Operating, investing and financing activities	24.9	(45.5)
Currency translation	(7.0)	(3.9)
Balance at beginning of period	362.0	392.3
Balance at end of period	379.9	342.9
Cash paid for:
Interest, net of amount capitalized	9.2	8.5
Income taxes	3.9	(0.1)
Accrual for capital expenditures	$ 2.5	$ 2.3