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Fair Value Measurements Sale of Shares in Investment (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended
Mar. 31, 2014
Fair Value Disclosures [Abstract]  
Equity investment- number of shares sold 7.4whr_Equityinvestmentnumberofsharessold
Equity investment- value of shares sold $ 5whr_Equityinvestmentvalueofsharessold