Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating Activities:
Net income (loss)	$ 236.7	$ (79.7)	$ (627.1)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	156.4	160.8	170.3
Deferred taxes	2.1	(1.4)	(119.8)
Gain on joint venture deconsolidation	(15.9)	0.0	0.0
Impairment of goodwill	0.0	114.4	0.0
Non-cash restructuring charges	0.0	0.0	471.3
Debt extinguishment charge	0.0	37.0	0.0
Change in operating assets and liabilities:
Retirement benefits	(32.6)	(110.3)	(80.0)
Accounts receivable	16.0	(93.2)	(51.8)
Inventories	(108.5)	(139.2)	234.7
Accounts payable	153.7	125.8	(51.2)
Accrued income taxes	1.4	(1.9)	9.3
Accrued liabilities and other	(16.5)	10.1	0.6
Cash provided by (used in) operating activities	392.8	22.4	(43.7)
Investing Activities:
Purchases of property, plant and equipment	(139.2)	(122.7)	(202.2)
Purchases of businesses	(10.0)	0.0	0.0
Asset disposals and other	4.1	3.1	2.2
Cash flows provided by (used in) investing activities	(145.1)	(119.6)	(200.0)
Financing Activities:
Borrowings on long-term debt	7.1	8.5	387.5
Payments on long-term debt and capital leases	(6.4)	(353.0)	(2.7)
Net (payments) borrowings under credit facilities	(5.9)	1.6	3.1
Debt issuance costs	0.0	(0.8)	(10.4)
Debt extinguishment charge	0.0	(35.8)	0.0
Issuance of common stock	0.0	397.8	0.0
Dividends paid to shareholders	0.0	0.0	(25.8)
Dividends paid to noncontrolling interests	(10.0)	(8.0)	(16.0)
Sale to noncontrolling interest	14.4	3.7	0.0
Acquisition of noncontrolling interests	0.0	0.0	(12.2)
Shares repurchased for income tax withholding on share-based compensation	(6.5)	(4.8)	0.0
Cash (used in) provided by financing activities	(7.3)	9.2	323.5
Increase (decrease) in cash and cash equivalents	240.4	(88.0)	79.8
Cash and cash equivalents at beginning of year	141.6	229.6	149.8
Cash and cash equivalents at end of year	$ 382.0	$ 141.6	$ 229.6