Consolidated Balance Sheets - USD ($) $ in Thousands		Jun. 30, 2016	Mar. 31, 2016
Common Stock, Par or Stated Value Per Share		$ 0.10	$ 0.10
Receivables:
Fixed assets, net		$ 170,804	$ 163,305
Current Liabilities
Business Combination, Contingent Consideration, Liability, Current		13,353
Business Combination, Contingent Consideration, Liability, Noncurrent		49,570
REDEEMABLE NONCONTROLLING INTERESTS		$ 722,562	$ 175,785
STOCKHOLDERS' EQUITY
Common Stock, Shares Authorized		500,000,000	500,000,000
Common Stock, Shares, Issued		103,595,002	107,011,664
Consolidated Entity Excluding Consolidated Investment Vehicles Before Eliminations [Member]
Current Assets
Cash and cash equivalents		$ 490,688	$ 1,329,126
Receivables:
Investment securities	[1]	447,647	515,335
Other current assets		70,984	55,405
Current Liabilities
Other current liabilities		156,135	138,301
Consolidated Investment Vehicles [Member]
Current Assets
Cash and cash equivalents		968	297
Receivables:
Investment securities		146,520	48,715
Other current assets		3,427	6,970
Other non-current assets		7,601	84
Current Liabilities
Other current liabilities		6,682	4,548
Consolidated Legg Mason, Inc.
Current Assets
Restricted cash		19,494	19,580
Receivables:
Investment advisory and related fees		403,567	334,922
Other receivables		119,024	74,694
Total Current Assets		1,702,319	2,385,044
Fixed assets, net		170,804	163,305
Intangible assets, net		4,249,456	3,146,485
Goodwill		1,795,409	1,479,516
Deferred income taxes		208,034	206,797
Other non-current assets		162,970	139,215
TOTAL ASSETS		8,296,593	7,520,446
Current Liabilities
Accrued compensation		219,849	430,736
Accounts Payable and Accrued Liabilities, Current		220,092	201,572
Short-term borrowings		500,000	40,000
Business Combination, Contingent Consideration, Liability, Current		13,353	26,396
Total Current Liabilities		1,116,111	841,553
Deferred compensation		85,740	65,897
Deferred income taxes		304,779	260,386
Business Combination, Contingent Consideration, Liability, Noncurrent		49,570	58,189
Other non-current liabilities		161,940	141,886
Long-term Debt		1,738,321	1,740,985
TOTAL LIABILITIES		3,456,461	3,108,896
REDEEMABLE NONCONTROLLING INTERESTS		722,562	175,785
STOCKHOLDERS' EQUITY
Common stock, par value $.10; authorized 500,000,000 shares; issued 107,700,310 shares in December 2015 and 111,469,142 shares in March 2015		10,360	10,701
Additional paid-in capital		2,605,436	2,693,113
Employee stock trust		(25,626)	(26,263)
Deferred compensation employee stock trust		25,626	26,263
Retained earnings		1,569,994	1,576,242
AOCI Including Portion Attributable to Noncontrolling Interest, before Tax		(91,471)	(66,493)
TOTAL STOCKHOLDERS' EQUITY		4,117,570	4,235,765
Stockholders' Equity Attributable to Parent		4,094,319	4,213,563
Stockholders' Equity Attributable to Noncontrolling Interest		23,251	22,202
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY		$ 8,296,593	$ 7,520,446

[1] Excludes $56,837 and $2,611 of seed capital and other investments, respectively, as of June 30, 2016, and $13,641 of seed capital investments as of March 31, 2016, which are related to Legg Mason's investments in CIVs.