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Plan Information (Details)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2015
USD ($)
shares
Incentive Compensation Plan Initiation Year 2014
Number of shares initially available for grant 28.8
Maximum shares participants are eligible to receive 2.0
Cash Award performance vesting condition range from 0% to 300% of the target amount
Maximum Cash Award Per Employee | $ $ 10.0
Number of years stock options expire from grant date 10 years
Fair Value of shares on grant date is amortized over vesting period, years 3 years
Minimum [Member]  
Stock options exercisable period 2 years
Maximum [Member]  
Stock options exercisable period 4 years