Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net earnings	$ 121.1	$ 77.6
Adjustments to reconcile net earnings to net cash provided by (used for) operating activities:
Depreciation and amortization	62.9	70.1
Write off of debt financing costs		1.1
Deferred income taxes	53.0	28.0
Share-based compensation	8.1	9.6
Excess tax benefit from share-based awards		(5.8)
Equity earnings from joint venture	(51.9)	(57.0)
Separation costs		33.0
Loss on interest rate swap		10.7
U.S. pension expense	2.0	11.8
Other non-cash adjustments, net	(0.5)	(4.2)
Changes in operating assets and liabilities:
Receivables	(27.4)	(41.3)
Inventories	(1.5)	(4.4)
Other current assets	(3.6)	11.5
Other non-current assets	(3.3)	(7.0)
Accounts payable and accrued expenses	(35.9)	(88.2)
Income taxes payable	(7.8)	(24.1)
Other long-term liabilities	(8.8)	(19.4)
Other, net	(1.5)	(4.6)
Net cash provided by (used for) operating activities	104.9	(2.6)
Cash flows from investing activities:
Purchases of property, plant and equipment	(63.2)	(75.7)
Return of investment from joint venture	52.8	68.5
Cash paid for acquisition	(31.4)
Other investing activities	0.5	0.3
Net cash (used for) investing activities	(41.3)	(6.9)
Cash flows from financing activities:
Proceeds from revolving credit facility and other short-term debt	103.0	90.0
Payments of revolving credit facility and other short-term debt	(103.0)	(90.0)
Proceeds from long-term debt		363.5
Payments of long-term debt	(16.8)	(432.8)
Financing costs	(0.6)	(8.1)
Proceeds from exercised stock options	0.6	0.3
Cash transferred to Armstrong Flooring, Inc.		(9.1)
Excess tax benefit from share-based awards		5.8
Payment for treasury stock acquired	(75.4)	(7.8)
Net cash (used for) financing activities	(92.2)	(88.2)
Effect of exchange rate changes on cash and cash equivalents	3.2	(4.6)
Net (decrease) in cash and cash equivalents	(25.4)	(102.3)
Cash and cash equivalents at beginning of year	141.9	244.8
Cash and cash equivalents at end of period	116.5	142.5
Supplemental Cash Flow Disclosures:
Interest paid	23.1	25.2
Income tax payments, net	20.2	23.9
Amounts in accounts payable for capital expenditures	$ 1.8	$ 4.7