Financing Arrangements (Senior Notes) (Details) (USD $)			0 Months Ended	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	May 18, 2007 6.375% Senior Notes [Member]	Jun. 30, 2014 6.375% Senior Notes [Member]	Jun. 30, 2014 Change in Control and Below Investment Grade Rating [Member] 6.375% Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount			$ 400,000,000
Debt instrument, stated interest rate (as a percentage)			6.375%
Debt instrument, maturity date			Jun. 01, 2017
Debt Instrument, Redemption Price (as a percentage)				100.00%	101.00%
Default on senior notes				0
Number of days in year per debt terms				360 days
Number of months in year per debt terms				12 months
Number of days in month, per debt terms				30 days
Debt instrument, benchmark for variable rate basis				Treasury rate
Treasury rate basis points (as a percentage)				0.30%
Senior note, failure to perform covenant				60 days
Senior note, grace period for defaulted payment				30 days
Threshold for noncompliance				50,000,000
Accelerated principal amount threshold				50,000,000
Senior notes amount	$ 399,402,000	$ 399,300,000