CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 29.2	$ 19.6
Depreciation	17.5	18.3
Amortization	1.1	1.2
Other non-cash items, net	2.1	2.1
Changes in assets and liabilities	(36.1)	(31.7)
Net cash provided by operating activities	13.8	9.5
Cash flows from investing activities:
Capital expenditures	(32.4)	(19.4)
Acquisition of patents and other long-term assets	0	(0.4)
Sales (purchases) of short-term investments, net	0.2	(9.6)
Other, net	0.3	0.3
Net cash used in investing activities	(31.9)	(29.1)
Cash flows from financing activities:
Borrowings under revolving credit agreements, net	29.3	6.0
Changes in other debt	(0.1)	(0.3)
Dividend payments	(6.1)	(5.4)
Excess tax benefit from employee stock plans	0.3	1.2
Shares repurchased for employee tax withholdings	(0.6)	(2.1)
Issuance of common stock from treasury	1.4	0.7
Net cash provided by financing activities	24.2	0.1
Effect of exchange rates on cash	2.3	3.9
Net increase (decrease) in cash and cash equivalents	8.4	(15.6)
Cash, including cash equivalents at beginning of period	91.8	110.2
Cash, including cash equivalents at end of period	$ 100.2	$ 94.6