Revenue and Contract Balances (Tables)

12 Months Ended

Sep. 27, 2020

Revenue from Contract with Customer [Abstract]

Summary of revenue disaggregated by client sector and contract type

The following tables present revenue disaggregated by client sector and contract type:

	Fiscal Year Ended
	September 27, 2020		September 29, 2019		September 30, 2018
	(in thousands)
Client Sector:
U.S. state and local government	$	439,019	$	587,364	$	469,231
U.S. federal government (1)	993,835		941,102		974,384
U.S. commercial	674,605		719,314		788,398
International (2)	887,432		859,568		732,135
Total	$	2,994,891	$	3,107,348	$	2,964,148
Contract Type:
Fixed-price	$	1,078,432	$	1,048,157	$	986,910
Time-and-materials	1,391,592		1,509,901		1,395,148
Cost-plus	524,867		549,290		582,090
Total	$	2,994,891	$	3,107,348	$	2,964,148

(1) Includes revenue generated under U.S. federal government contracts performed outside the United States.

(2) Includes revenue generated from foreign operations, primarily in Canada, Australia, the United Kingdom, and revenue generated from non-U.S. clients.

Summary of net contract assets/liabilities

Net contract assets/liabilities consisted of the following:

	Balance at
	September 27, 2020		September 29, 2019
	(in thousands)
Contract assets (1)	$	92,632	114,324
Contract liabilities	171,905		165,611
Net contract liabilities	$	(79,273)	$	(51,287)

(1) Includes $12.3 million and $26.5 million of contract retentions as of September 27, 2020 and September 29, 2019, respectively.

Components of net accounts receivable

Net accounts receivable consisted of the following:

	Balance at
	September 27, 2020		September 29, 2019
	(in thousands)
Billed	$	402,818	$	496,985
Unbilled	253,364		282,297
Total accounts receivable	656,182		779,282
Allowance for doubtful accounts	(7,147)		(10,562)
Total accounts receivable, net	$	649,035	$	768,720

Remaining performance obligation, expected timing

We expect to satisfy our RUPOs as of September 27, 2020 over the following periods:

	Amount
	(in thousands)
Within 12 months	$	1,846,527
Beyond	1,372,446
Total	$	3,218,973