Net Capital Requirements (Tables)

12 Months Ended

Dec. 31, 2018

Brokers And Dealers [Abstract]

Partnership's Capital Figures for U.S. and Canada Broker-Dealer Subsidiaries

The following table shows the Partnership’s capital figures for its U.S. and Canada broker-dealer subsidiaries as of December 31, 2018 and 2017:

	2018			2017
U.S.:
Net capital	$	1,280		$	1,107
Net capital in excess of the minimum required	$	1,221		$	1,049
Net capital as a percentage of aggregate debit items		43.6	%		38.1	%
Net capital after anticipated capital withdrawals, as a    percentage of aggregate debit items		28.3	%		21.6	%
Canada:
Regulatory risk-adjusted capital	$	40		$	50
Regulatory risk-adjusted capital in excess of the    minimum required to be held by IIROC	$	39		$	42