Goodwill

The following table summarizes the changes in the carrying amount of Goodwill, by segment, as of September 30, 2017.



(in millions)	GBS		GIS		USPS		Total
Balance as of March 31, 2017, net	$	1,470	$	385	$	—	$	1,855
Additions	2,996		3,423		736		7,155
Foreign currency translation	93		55		—		148
Balance as of September 30, 2017, net	$	4,559	$	3,863	$	736	$	9,158

The additions to goodwill during the six months ended September 30, 2017 were primarily due to the Merger described in Note 3 - "Acquisitions." As a result of the Merger, the Company began to report the United States Public Sector ("USPS") segment, formerly a component of the HPES business, see Note 17 - "Segment Information" for additional information. The foreign currency translation amounts reflect the impact of currency movements on non-U.S. dollar-denominated goodwill balances.

Goodwill Impairment Analyses

The Company tests goodwill for impairment on an annual basis, as of the first day of the second fiscal quarter, and between annual tests if circumstances change, or if an event occurs that would more likely than not reduce the fair value of a reporting unit below its carrying amount. The Company’s annual goodwill impairment analysis, which was performed qualitatively during the three months ended September 30, 2017, did not result in an impairment charge. This qualitative analysis, which is commonly referred to as step zero under ASC Topic 350, Goodwill and Other Intangible Assets, considered all relevant factors specific to the reporting units, including macroeconomic conditions; industry and market considerations; overall financial performance and relevant entity-specific events.