Fair Value Measurements (Contingent Consideration) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Fair Value	$ 59
Valuation Technique	Discounted cash flow
Unobservable Input	Probability of occurrence
Minimum
Probability of Occurence	85.00%
Maximum
Probability of Occurence	100.00%
Weighted Average
Probability of Occurence	95.00%