Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 29, 2017	Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 0	$ 0
Adjustments to reconcile net income to net cash provided by operating activities:
Income before allocations to partners	633	585
Depreciation and amortization	63	61
Changes in assets and liabilities:
Cash and investments segregated under federal regulations	2,889	(1,099)
Securities purchased under agreements to resell	(17)	73
Net payable to clients	(3,059)	1,316
Net receivable from brokers, dealers and clearing organizations	13	(33)
Receivable from mutual funds, insurance companies and other	(31)	(49)
Securities owned	(60)	(58)
Other assets	4	(2)
Accrued compensation and employee benefits	169	30
Accounts payable, accrued expenses and other	29	41
Net cash provided by operating activities	633	865
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of equipment, property and improvements, net	(55)	(52)
Net cash used in investing activities	(55)	(52)
CASH FLOWS FROM FINANCING ACTIVITIES:
Issuance of partnership interests	73	72
Redemption of partnership interests	(182)	(174)
Distributions from partnership capital	(521)	(551)
Net cash used in financing activities	(630)	(653)
Net (decrease) increase in cash and cash equivalents	(52)	160
CASH AND CASH EQUIVALENTS:
Beginning of period	1,047	937
End of period	995	1,097
Cash paid for interest	63	56
Cash paid for taxes	8	9
NON-CASH ACTIVITIES:
Issuance of general partnership interests through partnership loans in current period	142	146
Repayment of partnership loans through distributions from partnership capital in current period	$ 110	$ 97