Segment Information (Tables)

12 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Operating Results by Reportable Segment

Our depreciation and amortization expense by reportable segment was as follows:

	Successor				Predecessor
	Fiscal Years Ended				Five Months Ended		Fiscal Year Ended
(in millions)	March 31, 2019		March 31, 2018		March 31, 2017		October 31, 2016
Defense and Intelligence	$	74	$	34	$	34	$	95
Civilian and Health Care	91		64		39		130
Amortization of acquired intangible assets	165		69		—		—
Total depreciation and amortization	$	330	$	167	$	73	$	225

The following tables summarize operating results regularly provided to the chief operating decision maker by reportable segment and a reconciliation of those reporting results to the statements of operations for the relevant periods.

Revenue

Our revenue by reportable segment was as follows:

	Successor				Predecessor
	Fiscal Years Ended				Five Months Ended		Fiscal Year Ended
(in millions)	March 31, 2019		March 31, 2018		March 31, 2017		October 31, 2016
Defense and Intelligence	$	2,587	$	1,416	$	488	$	1,153
Civilian and Health Care	1,443		1,403		585		1,579
Total revenue	$	4,030	$	2,819	$	1,073	$	2,732

Segment Profit

Our segment profit by reportable segment was as follows:

	Successor				Predecessor
	Fiscal Years Ended				Five Months Ended		Fiscal Year Ended
(in millions)	March 31, 2019		March 31, 2018		March 31, 2017		October 31, 2016
Defense and Intelligence	$	331	$	168	$	35	$	51
Civilian and Health Care	196		222		75		183
Total segment profit	$	527	$	390	$	110	$	234

Reconciliation of Consolidated Operating Income to Income Before Taxes

T