Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 124.0	$ 109.8	$ 377.6	$ 259.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	30.7	31.1	91.8	91.3
Equity in (income) loss of unconsolidated affiliates, including dividends	1.3	(0.2)	0.2	(1.2)
(Gain) loss on sale or impairment of long lived assets, net	0.3	0.7	(0.3)	(1.8)
Other operating credits and charges, net	(6.2)	(0.9)	(6.9)	4.5
Stock-based compensation related to stock plans	2.1	2.0	6.9	8.0
Exchange (gain) loss on remeasurement	0.5	(0.1)	0.5	1.6
Cash settlements of warranties, net of accruals	(0.7)	0.1	(2.2)	(5.5)
Cash settlements of contingencies, net of accruals	(0.6)	(0.3)	(2.1)	(0.5)
Pension contributions	(35.8)	(6.1)	(40.9)	(12.7)
Pension expense	2.3	2.9	6.9	8.8
Other adjustments, net	(0.1)	0.2	0.6	0.4
(Increase) decrease in receivables	19.2	(17.1)	(26.2)	(61.9)
(Increase) decrease in inventories	1.7	(8.5)	(11.7)	4.5
(Increase) decrease in prepaid expenses	1.1	0.6	(4.1)	(2.7)
Increase (decrease) in accounts payable and accrued liabilities	1.9	18.1	(17.6)	12.8
Increase in income taxes	9.5	11.1	46.7	0.2
Net cash provided by operating activities	151.2	143.4	419.2	305.0
CASH FLOWS FROM INVESTING ACTIVITIES:
Property, plant, and equipment additions	(62.8)	(35.0)	(150.4)	(80.7)
Proceeds from sales of assets	0.0	0.1	0.9	3.3
Investments in unconsolidated affiliate	0.0	0.0	(45.0)	0.0
Payment of long-term deposit	0.0	0.0	0.0	(32.0)
Receipt of proceeds from notes receivable from asset sales	0.0	0.0	22.2	0.0
Other investing activities	(0.1)	0.1	(0.4)	0.3
Net cash used in investing activities	(62.9)	(34.8)	(172.7)	(109.1)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayment of long-term debt	(22.1)	(1.2)	(22.4)	(2.5)
Payment of cash dividend	(18.5)	0.0	(56.1)	0.0
Purchase of treasury stock	(59.8)	0.0	(98.7)	0.0
Sale of common stock, net of cash payments under equity plans	0.0	0.0	0.1	(0.4)
Taxes paid related to net share settlement of equity awards	1.5	0.5	9.3	5.3
Other financing activities	0.0	0.0	3.1	0.0
Net cash used in financing activities	(101.9)	(1.7)	(183.3)	(8.2)
EFFECT OF EXCHANGE RATE ON CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(0.6)	1.8	(4.5)	1.7
Net increase in cash, cash equivalents and restricted cash	(14.2)	108.7	58.7	189.4
Cash, cash equivalents and restricted cash at beginning of period	1,014.2	753.2	941.3	672.5
Cash, cash equivalents and restricted cash at end of period	$ 1,000.0	$ 861.9	$ 1,000.0	$ 861.9