Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 394.6	$ 389.8	$ 149.8
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	120.0	123.3	112.8
Equity in (income) loss of unconsolidated affiliates, including dividends	3.3	(0.8)	1.5
Other operating credits and charges, net	2.2	4.9	17.4
(Gain) loss on sale or impairment of long-lived assets, net	10.8	6.8	(8.4)
Loss on early debt extinguishment	0.0	0.0	17.3
Stock-based compensation	8.6	9.7	13.0
Exchange (gain) loss on remeasurement	(1.1)	2.1	(2.0)
Cash settlements of warranty, net of accruals	(2.9)	(6.8)	(13.6)
Cash settlement of contingencies, net of accruals	(2.3)	(1.0)	(0.7)
Pension contributions	(41.1)	(12.8)	(7.0)
Pension expense	7.5	14.1	10.7
Other adjustments, net	1.2	1.5	3.4
(Increase) decrease in receivables	3.4	(35.0)	(8.9)
Increase in inventories	(1.9)	(22.7)	(11.0)
(Increase) decrease in prepaid expenses	(0.4)	(1.6)	1.0
Increase (decrease) in accounts payable and accrued liabilities	(20.7)	22.5	53.8
Increase (decrease) in income taxes payable or deferred income taxes	29.3	(20.3)	13.2
Net cash provided by operating activities	510.5	473.7	342.3
CASH FLOWS FROM INVESTING ACTIVITIES:
Property, plant, and equipment additions	(214.2)	(148.6)	(124.8)
Proceeds from asset sales	1.0	3.2	0.3
Acquisition of businesses, net of cash acquired	0.0	(20.8)	0.0
Investment in unconsolidated affiliates	(45.0)	0.0	0.0
Receipt of proceeds from notes receivable from asset sales	22.2	0.0	410.0
Payment of long-term deposit	0.0	(32.0)	0.0
Other investing activities, net	(2.2)	(0.4)	(0.4)
Net cash provided by (used in) investing activities	(238.2)	(198.6)	285.1
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings of long-term debt	0.0	0.0	350.0
Repayment of long term debt	(24.7)	(2.6)	(742.5)
Payment of debt issuance fees	0.0	(0.5)	(5.2)
Payment of cash dividends	(74.4)	0.0	0.0
Purchase of treasury stock	(211.8)	0.0	0.0
Taxes paid related to net share settlement of equity awards	(9.3)	(5.9)	(9.2)
Other financing activities, net	3.2	(0.4)	(0.1)
Net cash used in financing activities	(317.0)	(9.4)	(407.0)
Effect of exchange rate on cash, cash equivalents and restricted cash	(4.8)	3.1	3.1
Net increase (decrease) in cash, cash equivalents and restricted cash	(49.5)	268.8	223.5
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 891.8	$ 941.3	$ 672.5