CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Operating Activities:
Net income		$ 60.5	$ 21.1
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization		39.8	40.3
Deferred taxes		(0.2)	1.2
Gain on joint venture deconsolidation		(15.9)	0.0
Changes in operating assets and liabilities:
Inventories		(108.4)	(14.9)
Accounts receivable		(61.7)	(52.5)
Accounts payable		79.8	47.2
Retirement benefits (a)	[1]	0.5	(128.1)
Accrued income taxes		2.4	(0.3)
Accrued liabilities and other		(43.9)	(24.2)
Cash used in operating activities		(47.1)	(110.2)
Investing Activities:
Purchases of property, plant and equipment		(41.6)	(24.8)
Asset disposals and other		0.1	2.6
Cash used in investing activities		(41.5)	(22.2)
Financing Activities:
Borrowings on long-term debt		6.4	0.0
Payments on long-term debt and capital leases		(1.3)	(0.3)
Net borrowings under credit facilities		50.9	67.7
Sales to noncontrolling interests		7.4	0.0
Shares repurchased for income tax withholding on share-based compensation and other		(6.5)	(4.8)
Cash provided by financing activities		56.9	62.6
Increase (decrease) in cash and cash equivalents
Decrease in cash and cash equivalents		(31.7)	(69.8)
Cash and cash equivalents at beginning of period		141.6	229.6
Cash and cash equivalents at end of period		$ 109.9	$ 159.8

[1] Includes a $(135) million contribution to the U.S. defined benefit pension plan in 2017.