CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Activities:
Net income (loss)	$ 11.6	$ 58.3
Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities Abstract
Depreciation and amortization	48.5	48.0
Deferred taxes	36.0	(12.0)
Change in operating assets and liabilities:
Inventories	(0.9)	(127.1)
Accounts receivable	(68.2)	(44.0)
Accounts payable	(20.4)	15.2
Retirement benefits	16.6	11.5
Accrued income taxes	(31.9)	26.8
Accrued liabilities and other	(48.7)	5.1
Cash provided by (used in) operating activities	(57.4)	(18.2)
Investing Activities:
Purchases of property, plant and equipment	(86.9)	(69.9)
Asset disposals and other	0.7	0.9
Cash provided by (used in) investing activities	(86.2)	(69.0)
Financing Activities:
Payments on long-term debt and capital leases	(0.1)	0
Net borrowings under credit facilities	0	(1.4)
Dividends paid to shareholders	(19.2)	(19.1)
Shares repurchased for income tax withholding on share-based compensation	(6.7)	(23.3)
Exercises of stock options	0.4	0.2
Taxes on share-based compensation	2.6	0.5
Cash provided by (used in) financing activities	(23.0)	(43.1)
Increase (decrease) in cash and cash equivalents
Increase (decrease) in cash and cash equivalents	(166.6)	(130.3)
Cash and cash equivalents at beginning of period	304.6	380.6
Cash and cash equivalents at end of period	$ 138.0	$ 250.3