Goodwill And Acquisition-Related Intangibles, Net (Tables)

6 Months Ended

Sep. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule Of Changes In The Carrying Amount Of Goodwill

The changes in the carrying amount of goodwill for the six months ended September 30, 2016 are as follows (in millions):

	As of March 31, 2016			Activity		Effects of Foreign Currency Translation			As of September 30, 2016
Goodwill	$	2,078		$	—	$	(1	)	$	2,077
Accumulated impairment	(368		)	—		—			(368		)
Total	$	1,710		$	—	$	(1	)	$	1,709

Schedule Of Acquisition-Related Intangibles

Acquisition-related intangibles consisted of the following (in millions):

	As of September 30, 2016							As of March 31, 2016
	Gross Carrying Amount		Accumulated Amortization			Acquisition- Related Intangibles, Net		Gross Carrying Amount		Accumulated Amortization			Acquisition- Related Intangibles, Net
Developed and core technology	$	412	$	(395	)	$	17	$	412	$	(368	)	$	44
Trade names and trademarks	106		(95		)	11		106		(93		)	13
Registered user base and other intangibles	5		(5		)	—		5		(5		)	—
Carrier contracts and related	85		(85		)	—		85		(85		)	—
Total	$	608	$	(580	)	$	28	$	608	$	(551	)	$	57

Schedule Of Amoritization Of Intangibles

Amortization of intangibles for the three and six months ended September 30, 2016 and 2015 are classified in the Condensed Consolidated Statement of Operations as follows (in millions):

	Three Months Ended September 30,				Six Months Ended September 30,
	2016		2015		2016		2015
Cost of service and other	$	8	$	8	$	16	$	16
Cost of product	4		3		9		7
Operating expenses	1		3		3		4
Total	$	13	$	14	$	28	$	27

Schedule Of Future Amortization Of Acquisition-Related Intangibles

As of September 30, 2016, future amortization of acquisition-related intangibles that will be recorded in the Condensed Consolidated Statement of Operations is estimated as follows (in millions):

Fiscal Year Ending March 31,
2017 (remaining six months)	$	9
2018	17
2019	2
Total	$	28