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Incentive Compensation Plans Plan Information (Details)
$ in Millions
 9 Months Ended
Sep. 30, 2021
USD ($)
Share-based Payment Arrangement [Abstract]  
Performance cash awards granted during the period target value $ 40.0
Restricted cash awards granted during the period target value $ 84.6
Performance based cash award vesting period 3 years
Restricted cash awards vesting period floor 2 years
Cash awards vesting period 3 years