Revenue

Disaggregated Revenue

Revenue by contract type was as follows:



	Three Months Ended September 30, 2019						Three Months Ended September 30, 2018
(in millions)	Defense and Intelligence		Civilian and Health Care		Total		Defense and Intelligence		Civilian and Health Care		Total
Cost-reimbursable	$	267	$	25	$	292	$	231	$	20	$	251
Fixed-price	411		251		662		367		240		607
Time-and-materials	99		119		218		104		106		210
Total	$	777	$	395	$	1,172	$	702	$	366	$	1,068



	Six Months Ended September 30, 2019						Six Months Ended September 30, 2018
(in millions)	Defense and Intelligence		Civilian and Health Care		Total		Defense and Intelligence		Civilian and Health Care		Total
Cost-reimbursable	$	535	$	51	$	586	$	340	$	41	$	381
Fixed-price	783		465		1,248		612		470		1,082
Time-and-materials	211		234		445		187		211		398
Total	$	1,529	$	750	$	2,279	$	1,139	$	722	$	1,861

Revenue by prime or subcontractor was as follows:



	Three Months Ended September 30, 2019						Three Months Ended September 30, 2018
(in millions)	Defense and Intelligence		Civilian and Health Care		Total		Defense and Intelligence		Civilian and Health Care		Total
Prime contractor	$	733	$	372	$	1,105	$	660	$	315	$	975
Subcontractor	44		23		67		42		51		93
Total	$	777	$	395	$	1,172	$	702	$	366	$	1,068



	Six Months Ended September 30, 2019						Six Months Ended September 30, 2018
(in millions)	Defense and Intelligence		Civilian and Health Care		Total		Defense and Intelligence		Civilian and Health Care		Total
Prime contractor	$	1,441	$	695	$	2,136	$	1,077	$	650	$	1,727
Subcontractor	88		55		143		62		72		134
Total	$	1,529	$	750	$	2,279	$	1,139	$	722	$	1,861

Revenue by customer type was as follows:



	Three Months Ended September 30, 2019						Three Months Ended September 30, 2018
(in millions)	Defense and Intelligence		Civilian and Health Care		Total		Defense and Intelligence		Civilian and Health Care		Total
U.S. federal government, including independent agencies	$	773	$	322	$	1,095	$	700	$	298	$	998
Non-federal (state, local and other)	4		73		77		2		68		70
Total	$	777	$	395	$	1,172	$	702	$	366	$	1,068



	Six Months Ended September 30, 2019						Six Months Ended September 30, 2018
(in millions)	Defense and Intelligence		Civilian and Health Care		Total		Defense and Intelligence		Civilian and Health Care		Total
U.S. federal government, including independent agencies	$	1,521	$	614	$	2,135	$	1,136	$	591	$	1,727
Non-federal (state, local and other)	8		136		144		3		131		134
Total	$	1,529	$	750	$	2,279	$	1,139	$	722	$	1,861

Performance Obligations

As of September 30, 2019, approximately $4.14 billion of revenue is expected to be recognized from remaining unsatisfied performance obligations on executed contracts. The Company expects to recognize approximately 74% of these remaining performance obligations as revenue within 12 months and approximately 85% within 24 months, with the remainder recognized thereafter.

Contract Balances

Contract assets and contract liabilities were as follows:



(in millions)	Balance Sheets Line Item	September 30, 2019		March 31, 2019
Contract assets:
Unbilled receivables	Receivables, net of allowance for doubtful accounts	$	310	$	301
Contract liabilities:
Current portion of deferred revenue and advance contract payments	Other current liabilities	$	26	$	33
Non-current portion of deferred revenue and advance contract payments	Other long-term liabilities	6		12

Contract assets increased $9 million during the six months ended September 30, 2019, primarily due to the acquisition of Knight Point. There were no significant impairment losses related to the Company’s contract assets during the six months ended September 30, 2019 or 2018.

Contract liabilities decreased $13 million during the six months ended September 30, 2019, primarily due to revenue recognized in excess of payments received. During the three and six months ended September 30, 2019, the Company recognized $5 million and $29 million, respectively, of the deferred revenue and advance contract payments at March 31, 2019 as revenue. During the three and six months ended September 30, 2018, the Company recognized $12 million and $22 million, respectively, of the deferred revenue and advance contract payments at April 1, 2018 as revenue.