Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 432,876	$ 397,905	$ 306,373
Other comprehensive income (loss):
Unrealized loss on cash flow hedges, net of tax	0	0	(413)
Amortization of net gains (losses) on cash flow hedges, net of tax	(100)	(101)	27
Unrealized gains (losses) on available-for-sale investments, net of tax	0	(414)	1,185
Foreign currency translation adjustments	(1,322)	(5,192)	9,310
Other comprehensive income (loss), net of tax	(1,422)	(5,707)	10,109
Total comprehensive income	431,454	392,198	316,482
Comprehensive income attributable to non-controlling and other beneficial interests	(32,841)	(15,967)	(24,242)
Total comprehensive income attributable to Eaton Vance Corp. shareholders	$ 398,613	$ 376,231	$ 292,240