As of September 24, 2021 and December 31, 2020, collateral held for receivables from clients was $4,694 and $4,035, respectively, and collateral held for securities purchased under agreements to resell was $1,525 and $1,743, respectively. As the fair value of the collateral either exceeded or was at least 100% of the amortized cost, the expected credit loss was zero for each period. Additionally, partnership loan values remained below the value of capital allocated to partners, resulting in an expected credit loss of zero as of September 24, 2021 and December 31, 2020.

As of September 24, 2021, December 31, 2020 and December 31, 2019, $677, $563 and $470, respectively, of the receivable from clients balance and $325, $285 and $291, respectively, of the receivable from mutual funds, insurance companies and other balance related to revenue contracts with customers. The related fees are paid out of client accounts or third-party products consisting of cash and securities, and the collateral value of those accounts continues to exceed the amortized cost basis of these receivables, resulting in a remote risk of loss. The expected credit loss for receivables from contracts with customers was zero as of September 24, 2021 and December 31, 2020.

The Partnership derived 13% and 12% of its total revenue for the three- and nine-month periods ended September 24, 2021, respectively, and 13% of its total revenue for both of the three- and nine-month periods ended September 25, 2020, respectively, from one mutual fund company. The revenue generated from this company relates to business conducted with the Partnership's U.S. segment.

The following table shows the Partnership's disaggregated revenue information. See Note 8 for segment information.


	Three Months Ended September 24, 2021						Three Months Ended September 25, 2020
	U.S.		Canada		Total		U.S.		Canada		Total
Fee revenue:
Asset-based fee revenue:
Advisory programs fees	$	1,904	$	34	$	1,938	$	1,409	$	22	$	1,431
Service fees		403		29		432		330		23		353
Other asset-based fees		165		—		165		142		—		142
Total asset-based fee revenue		2,472		63		2,535		1,881		45		1,926
Account and activity fee revenue:
Shareholder accounting services fees		109		—		109		106		—		106
Other account and activity fee revenue		59		4		63		54		3		57
Total account and activity fee revenue		168		4		172		160		3		163
Total fee revenue		2,640		67		2,707		2,041		48		2,089
Trade revenue:
Commissions		381		11		392		376		10		386
Principal transactions		9		1		10		12		—		12
Total trade revenue		390		12		402		388		10		398
Total revenue from customers		3,030		79		3,109		2,429		58		2,487
Net interest and dividends and other revenue		22		9		31		40		-		40
Net revenue	$	3,052	$	88	$	3,140	$	2,469	$	58	$	2,527


	Nine Months Ended September 24, 2021						Nine Months Ended September 25, 2020
	U.S.		Canada		Total		U.S.		Canada		Total
Fee revenue:
Asset-based fee revenue:
Advisory programs fees	$	5,326	$	92	$	5,418	$	3,928	$	61	$	3,989
Service fees		1,157		83		1,240		950		66		1,016
Other asset-based fees		471		—		471		445		—		445
Total asset-based fee revenue		6,954		175		7,129		5,323		127		5,450
Account and activity fee revenue:
Shareholder accounting services fees		325		—		325		319		—		319
Other account and activity fee revenue		177		11		188		166		9		175
Total account and activity fee revenue		502		11		513		485		9		494
Total fee revenue		7,456		186		7,642		5,808		136		5,944
Trade revenue:
Commissions		1,212		39		1,251		1,204		37		1,241
Principal transactions		28		2		30		43		2		45
Total trade revenue		1,240		41		1,281		1,247		39		1,286
Total revenue from customers		8,696		227		8,923		7,055		175		7,230
Net interest and dividends and other revenue		89		15		104		98		15		113
Net revenue	$	8,785	$	242	$	9,027	$	7,153	$	190	$	7,343