CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income	$ 32.9	$ 27.1
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation	21.0	20.6
Amortization	1.0	1.2
Stock-based compensation	5.3	4.3
Other non-cash items, net	(1.0)	(1.2)
Changes in assets and liabilities	(61.1)	(43.2)
Net cash (used in) provided by operating activities	(1.9)	8.8
Cash flows from investing activities:
Capital expenditures	(30.4)	(31.7)
Purchases of short-term investments	0	(9.2)
Sales and maturities of short-term investments	0	5.0
Other, net	(0.2)	0.3
Net cash used in investing activities	(30.6)	(35.6)
Cash flows from financing activities:
Borrowings under revolving credit agreements	6.3	125.3
Repayments under revolving credit agreements	(1.0)	(93.3)
Repayments of long-term debt	(0.6)	(0.6)
Dividend payments	(7.9)	(7.1)
Excess tax benefit from employee stock plans	2.9	2.7
Shares repurchased for employee tax withholdings	(5.7)	(4.1)
Proceeds from exercise of stock options and stock appreciation rights	6.6	2.4
Employee stock purchase plan contributions	0.7	0.8
Other	(0.1)	0.1
Net cash provided by financing activities	1.2	26.2
Effect of exchange rates on cash	(16.9)	0.6
Net decrease in cash and cash equivalents	(48.2)	0
Cash and cash equivalents at beginning of period	255.3	230.0
Cash and cash equivalents at end of period	$ 207.1	$ 230.0