Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net earnings	$ 166.8	$ 151.3
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	52.4	61.5
Loss on disposal of discontinued operations	31.9	21.0
Write-off debt refinancing fees	2.7
Deferred income taxes	37.9	9.2
Share-based compensation	7.1	9.2
Equity earnings from joint venture	(83.0)	(59.2)
U.S. pension (credit)	(5.7)	(19.7)
Other non-cash adjustments, net	2.3	0.6
Changes in operating assets and liabilities:
Receivables	(4.4)	8.5
Inventories	(8.4)	(14.3)
Other current assets	(5.8)	3.6
Lease right-of-use assets	(5.3)
Other non-current assets	1.5	(1.2)
Accounts payable and accrued expenses	(27.0)	(8.9)
Income taxes receivables and payables, net	(33.1)	9.3
Non-current lease liabilities	5.4
Other long-term liabilities	(12.2)	(12.0)
Other, net	(1.7)	0.1
Net cash provided by operating activities	121.4	159.0
Cash flows from investing activities:
Purchases of property, plant and equipment	(44.0)	(40.7)
Return of investment from joint venture	64.4	88.9
Cash paid for acquisitions	(43.4)	(24.0)
Cash consideration received from Knauf		330.0
Payments of proceeds from Knauf to investment in joint venture		(70.0)
Payments to Knauf upon disposal of discontinued operations	(47.9)
Other investing activities		1.7
Net cash (used for) provided by investing activities	(70.9)	285.9
Cash flows from financing activities:
Proceeds from revolving credit facility	120.0
Proceeds from long-term debt	500.0
Payments of long-term debt	(790.4)	(24.4)
Financing costs	(2.9)
Dividend paid	(25.9)
(Payments) proceeds from share-based compensation plans, net of tax	(8.6)	18.0
Payment for treasury stock acquired	(81.2)	(256.1)
Net cash (used for) financing activities	(289.0)	(262.5)
Effect of exchange rate changes on cash and cash equivalents	0.8	(5.0)
Net (decrease) increase in cash and cash equivalents	(237.7)	177.4
Cash and cash equivalents at beginning of year of discontinued operations	10.0
Cash and cash equivalents at beginning of year of continuing operations	325.7	159.6
Cash and cash equivalents at end of period	98.0	337.0
Cash and cash equivalents at end of period of discontinued operations		10.0
Cash and cash equivalents at end of period of continuing operations	98.0	327.0
Supplemental Cash Flow Disclosures:
Interest paid	26.9	24.6
Income tax payments, net	46.3	20.0
Amounts in accounts payable for capital expenditures	$ 0.7	$ 0.6