Fair Value Measurements (Details 3) (USD $)	9 Months Ended	12 Months Ended	3 Months Ended		9 Months Ended			9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2014 Foreign Currency Contracts	Dec. 31, 2013 Foreign Currency Contracts	Sep. 30, 2014 Not Designated as Hedges Foreign Currency Contracts	Sep. 30, 2013 Not Designated as Hedges Foreign Currency Contracts	Sep. 30, 2014 Not Designated as Hedges Foreign Currency Contracts	Sep. 30, 2013 Not Designated as Hedges Foreign Currency Contracts	Dec. 31, 2013 Not Designated as Hedges Foreign Currency Contracts	Sep. 30, 2014 Designated As Hedges	Sep. 30, 2014 Designated As Hedges Foreign Currency Contracts	Sep. 30, 2014 Designated As Hedges Foreign Currency Contracts
Derivatives Fair Value [Line Items]
Fair Value, Assets, Not Designated As Hedges							$ 0
Pre-tax net gain (loss) on foreign currency contracts			0	0	0	0
Net unrealized gains to be reclassified into earnings within the next twelve months								5,000,000
Notional amount of foreign currency derivatives			0		0		34,000,000		78,000,000	78,000,000
Ineffective Portion Relating to these Hedges									0	0
Pre-tax net gain (loss) on forward contracts reclassified into general and administrative expenses									$ 2,000,000	$ 2,000,000
Maximum length of time over which our foreign currency forward contracts mature	1 year	1 year