Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Consolidated Statements of Comprehensive Income
Net income	$ 264,768	$ 227,574	$ 201,225
Other comprehensive income (loss):
Amortization of loss on derivatives, net of income taxes of $157, $158 and $158, respectively	290	289	290
Unrealized holding gains on available-for-sale investments, net of income taxes of $1,269, $850, and $517, respectively	2,075	1,345	770
Foreign currency translation adjustments, net of income taxes of $(161), $(56), and $16, respectively	218	141	(101)
Other comprehensive income (loss), net of tax	2,583	1,775	959
Total comprehensive income	267,351	229,349	202,184
Comprehensive income attributable to non-controlling and other beneficial interests	(61,303)	(12,672)	(26,927)
Total comprehensive income attributable to Eaton Vance Corp. shareholders	$ 206,048	$ 216,677	$ 175,257