We define segment profit as segment revenues less cost of services, segment selling, general and administrative, and depreciation and amortization (excluding amortization of acquired intangible assets). We do not allocate to our segments certain operating expenses managed at the corporate level. These unallocated costs include certain corporate function costs, stock-based compensation expense, pension and OPEB actuarial and settlement gains and losses, restructuring costs, transaction and integration-related costs and amortization of acquired intangible assets. The following table presents our segment profit and segment profit margins:

Segment Profit
				Three Months Ended
(in millions)				September 30, 2017						Historical CSC September 30, 2016						Pro Forma Combined Company September 30, 2016
Profit
GBS profit				$	380					$	105					$	265
GIS profit				469						66						156
USPS profit				109						—						68
All other profit (loss)				(82		)				(51		)				(160		)
Interest Income				16						8						20
Interest expense				(78		)				(29		)				(89		)
Restructuring costs				(192		)				(25		)				(301		)
Transaction and integration-related costs				(66		)				(53		)				(70		)
Amortization of acquired intangible assets				(169		)				(22		)				(120		)
Income (loss) before income taxes				$	387					$	(1	)				$	(231	)
Segment profit margins
GBS				16.4		%				10.1		%				11.1		%
GIS				14.9		%				7.9		%				4.7		%
USPS				15.4		%				—		%				10.1		%
Segment Profit
				Six Months Ended
(in millions)				September 30, 2017						Historical CSC September 30, 2016						Pro Forma Combined Company September 30, 2016
Profit
GBS profit				$	662					$	215					$	551
GIS profit				759						117						223
USPS profit				186						—						149
All other profit (loss)				(52		)				(106		)				(321		)
Interest Income				32						18						41
Interest expense				(154		)				(54		)				(177		)
Restructuring costs				(382		)				(82		)				(432		)
Transaction and integration-related costs				(190		)				(109		)				(156		)
Amortization of acquired intangible assets				(289		)				(36		)				(233		)
Pension and OPEB actuarial and settlement losses				—						—						(198		)
Income (loss) before income taxes				$	572					$	(37	)				$	(553	)
Segment profit margins
GBS				14.5		%				10.3		%				11.4		%
GIS				12.4		%				6.8		%				3.4		%
USPS				13.4		%				—		%				10.8		%

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