Basis of Presentation (Tables)

12 Months Ended

Oct. 31, 2012

Basis Of Presentation Disclosure Table [Abstract]

Schedule of change in presentation of gains and other investment income, net and of investment income and net investment gains or losses earned by consolidated sponsored funds

	Year Ended
	October 31, 2011
(in thousands)		As Previously Reported	Reclassifications			As Reclassified
Other revenue	$	16,300	$	(11,425)	$	4,875
Total revenue		1,260,031		(11,425)		1,248,606
Operating income		437,657		(11,425)		426,232
Gains and other investment income, net		7,983		11,425		19,408
Net income		227,574		-		227,574
Net income attributable to Eaton Vance Corp. shareholders		214,902		-		214,902

	Year Ended
	October 31, 2010
(in thousands)		As Previously Reported	Reclassifications			As Reclassified
Other revenue	$	10,242	$	(5,701)	$	4,541
Total revenue		1,121,661		(5,701)		1,115,960
Operating income		353,282		(5,701)		347,581
Gains and other investment income, net		7,345		5,701		13,046
Net income		201,225		-		201,225
Net income attributable to Eaton Vance Corp. shareholders		174,298		-		174,298