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Earnings Per Share (Tables)
3 Months Ended
Jan. 31, 2018
Earnings Per Share Disclosure Tables [Abstract]  
Summary schedule of the calculation of earnings per basic and diluted shares
  Three Months Ended
  January 31,
 (in thousands, except per share data) 2018 2017
 Net income attributable to Eaton Vance Corp. shareholders$ 78,056$ 60,711
 Weighted-average shares outstanding – basic  115,282  110,267
 Incremental common shares  8,659  4,404
 Weighted-average shares outstanding – diluted  123,941  114,671
 Earnings per share:    
  Basic$ 0.68$ 0.55
  Diluted$ 0.63$ 0.53