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Financial Instruments and Fair Value Measurements - Level 3 Rollforward (Details) - USD ($)
$ in Millions
12 Months Ended
Nov. 30, 2019
Nov. 30, 2018
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Business Combination, Contingent Consideration, Liability Beginning Balance $ 0.6 $ 1.0
Business Combination, Contingent Consideration, Liability Ending Balance 0.0 0.6
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Business Combination, Contingent Consideration, Liability Beginning Balance 0.6 1.0
Adjustments   0.1
Adjustments (0.6)  
Payments   (0.5)
Business Combination, Contingent Consideration, Liability Ending Balance $ 0.0 $ 0.6