Summary of Significant Accounting Policies (Tables)

6 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Schedule of Estimated Useful Lives Of Intangible Assets

The estimated useful lives for finite-lived intangible assets are shown in the table below:

Acquired backlog	1 year
Software	2 to 10 years
Developed technology	6 years
Program assets	Expected program asset life
Outsourcing contract costs	Contract life, excluding option years

Intangible assets, including preliminary fair values of those recorded in the Mergers, consisted of the following:

	As of September 30, 2018
(in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Program assets	$	1,400	$	117	$	1,283
Software	80		44		36
Developed technology	105		8		97
Backlog	16		5		11
Outsourcing contract costs	20		7		13
Favorable leases	1		—		1
Total intangible assets	$	1,622	$	181	$	1,441

	As of March 31, 2018
(in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Program assets	$	900	$	69	$	831
Software	75		28		47
Outsourcing contract costs	20		1		19
Total intangible assets	$	995	$	98	$	897