Consolidated Statements of Financial Condition - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
ASSETS:
Cash and cash equivalents	$ 1,498	$ 846
Cash and investments segregated under federal regulations	8,241	10,099
Securities purchased under agreements to resell	911	1,164
Receivable from:
Clients	3,359	3,300
Mutual funds, insurance companies and other	555	540
Brokers, dealers and clearing organizations	261	247
Securities owned, at fair value:
Investment securities	250	258
Inventory securities	43	50
Equipment, property and improvements, at cost, net of accumulated depreciation and amortization	555	544
Other assets	142	128
TOTAL ASSETS	15,815	17,176
Payable to:
Clients	11,117	12,810
Brokers, dealers and clearing organizations	90	67
Accrued compensation and employee benefits	1,465	1,339
Accounts payable, accrued expenses and other	288	165
Total liabilities before partnership capital	12,960	14,381
Commitments and contingencies (Notes 12 and 13)
Partnership capital subject to mandatory redemption, net of reserve for anticipated withdrawals and partnership loans	2,507	2,505
Reserve for anticipated withdrawals	348	290
Total partnership capital subject to mandatory redemption	2,855	2,795
TOTAL LIABILITIES	15,815	17,176
Limited Partnership Capital [Member]
Payable to:
Partnership capital subject to mandatory redemption, net of reserve for anticipated withdrawals and partnership loans	884	890
Subordinated Limited Partnership Capital [Member]
Payable to:
Partnership capital subject to mandatory redemption, net of reserve for anticipated withdrawals and partnership loans	504	463
General Partnership Capital [Member]
Payable to:
Partnership capital subject to mandatory redemption, net of reserve for anticipated withdrawals and partnership loans	$ 1,119	$ 1,152