Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016		Sep. 30, 2015
Consolidated Legg Mason, Inc.
NET INCOME	$ 86,532	$ 62,919	$ 131,872		$ 157,858
Other comprehensive income (loss):
Foreign currency translation adjustment	4,167	(37,176)	(13,023)		(16,512)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	289	0	(2,718)		0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	181	0	(1,708)		0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	(2,394)	0	(2,718)		0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	1,505	0	1,708		0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	2,683	0	0		0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax	(14,054)	1,922	(19,159)		2,990
Total other comprehensive income (loss)	(7,204)	(35,254)	(32,182)		(13,522)
COMPREHENSIVE INCOME	79,328	27,665	99,690		144,336
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest	18,152	(1,400)	32,038		(1,009)
Consolidated Entity Excluding Consolidated Investment Vehicles Before Eliminations [Member]
NET INCOME			123,706	[1]	159,189
Other comprehensive income (loss):
COMPREHENSIVE INCOME ATTRIBUTABLE TO LEGG MASON, INC.	$ 61,176	$ 29,065	$ 67,652		$ 145,345

[1] Other represents consolidated sponsored investment products that are not designated as CIVs.