Incentive Compensation Plans Plan Information (Details) $ in Millions |
3 Months Ended |
|---|---|
|
Mar. 31, 2017
USD ($)
| |
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |
| Performance cash awards granted during the period target value | $ 53.9 |
| Restricted cash awards granted during the period target value | $ 2.2 |
| Cash awards vesting period | 3 years |