
	Three Months Ended September 27, 2020
	GMS		NSS		Total
DoD	$	203,693	$	65,354	$	269,047
Other U.S. government agencies	270,344		57,379		327,723
Commercial and non-U.S. customers	47,309		22,161		69,470
Total	$	521,346	$	144,894	$	666,240


	Nine Months Ended September 27, 2020
	GMS		NSS		Total
DoD	$	595,933	$	194,629	$	790,562
Other U.S. government agencies	781,004		177,535		958,539
Commercial and non-U.S. customers	109,706		67,988		177,694
Total	$	1,486,643	$	440,152	$	1,926,795


	Three Months Ended September 29, 2019
	GMS		NSS		Total
DoD	$	220,480	$	46,941	$	267,421
Other U.S. government agencies	284,218		94,105		378,323
Commercial and non-U.S. customers	30,937		21,036		51,973
Total	$	535,635	$	162,082	$	697,717


	Nine Months Ended September 29, 2019
	GMS		NSS		Total
DoD	$	635,531	$	162,409	$	797,940
Other U.S. government agencies	839,680		277,008		1,116,688
Commercial and non-U.S. customers	90,927		61,253		152,180
Total	$	1,566,138	$	500,670	$	2,066,808


	Three Months Ended September 27, 2020
	GMS		NSS		Total
Cost-reimbursable	$	302,795	$	35,656	$	338,451
Fixed-price	161,024		62,568		223,592
Time and materials	57,527		46,670		104,197
Total	$	521,346	$	144,894	$	666,240


	Nine Months Ended September 27, 2020
	GMS		NSS		Total
Cost-reimbursable	$	868,780	$	106,848	$	975,628
Fixed-price	481,309		185,218		666,527
Time and materials	136,554		148,086		284,640
Total	$	1,486,643	$	440,152	$	1,926,795


	Three Months Ended September 29, 2019
	GMS		NSS		Total
Cost-reimbursable	$	274,776	$	26,864	$	301,640
Fixed-price	220,142		66,548		286,690
Time and materials	40,717		68,670		109,387
Total	$	535,635	$	162,082	$	697,717


	Nine Months Ended September 29, 2019
	GMS		NSS		Total
Cost-reimbursable	$	870,155	$	72,566	$	942,721
Fixed-price	571,132		215,143		786,275
Time and materials	124,851		212,961		337,812
Total	$	1,566,138	$	500,670	$	2,066,808


	Three Months Ended September 27, 2020
	GMS		NSS		Total
United States	$	275,785	$	142,890	$	418,675
International	245,561		2,004		247,565
Total	$	521,346	$	144,894	$	666,240


	Nine Months Ended September 27, 2020
	GMS		NSS		Total
United States	$	802,230	$	434,904	$	1,237,134
International	684,413		5,248		689,661
Total	$	1,486,643	$	440,152	$	1,926,795


	Three Months Ended September 29, 2019
	GMS		NSS		Total
United States	$	299,306	$	160,412	$	459,718
International	236,329		1,670		237,999
Total	$	535,635	$	162,082	$	697,717


	Nine Months Ended September 29, 2019
	GMS		NSS		Total
United States	$	817,437	$	496,220	$	1,313,657
International	748,701		4,450		753,151
Total	$	1,566,138	$	500,670	$	2,066,808

The Company’s remaining performance obligations balance represents the expected revenue to be recognized for the satisfaction of remaining performance obligations on existing contracts. This balance excludes unexercised contract option years and task orders that may be issued underneath an indefinite delivery, indefinite quantity contract. The remaining performance obligations balance as of September 27, 2020 and December 31, 2019 was $1,527.0 million and $1,640.0 million, respectively.

The Company expects to recognize approximately 96.4% and 3.6% of the remaining performance obligations balance as revenue over the next year and thereafter, respectively.

Contract assets consist of unbilled receivables which represent rights to payment for work or services completed but not billed as of the reporting date. Contract assets are recorded as unbilled receivables within accounts receivable, net on the condensed consolidated balance sheets.

Contract liabilities are advances and milestone payments from customers on certain contracts that exceed revenue earned to date. Contract liabilities are recorded as customer advances and billings in excess of costs on the condensed consolidated balance sheets.

Contract assets and contract liabilities consisted of the following as of the dates presented (in thousands):


	September 27,		December 31,
	2020		2019
Contract assets	$	263,085	$	295,103
Contract liabilities	$	60,390	$	51,439

The decrease in contract assets of $(32.0) million during the nine-month period ended September 27, 2020 was primarily due to the timing of billings, partially offset by revenue recognized related to the satisfaction of performance obligations.

The increase in contract liabilities of $9.0 million during the nine-month period ended September 27, 2020 was primarily due to the timing of advance payments from customers partially offset by revenue recognized during the period.

During the three-month and nine-month periods ended September 27, 2020, the Company recognized $1.2 million and $34.6 million, respectively, relating to amounts that were included in the beginning balance of contract liabilities. During the three-month and nine-month periods ended September 29, 2019, the Company recognized $1.5 million and $21.2 million, respectively, relating to amounts that were included in the beginning balance of contract liabilities.