Goodwill And Acquisition-Related Intangibles, Net (Tables)

12 Months Ended

Mar. 31, 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 fiscal year ended March 31, 2016 are as follows (in millions):

	As of March 31, 2015			Activity		Effects of Foreign Currency Translation			As of March 31, 2016
Goodwill	$	2,081		$	—	$	(3	)	$	2,078
Accumulated impairment	(368		)	—		—			(368		)
Total	$	1,713		$	—	$	(3	)	$	1,710

The changes in the carrying amount of goodwill for the fiscal year ended March 31, 2015 are as follows (in millions):

	As of March 31, 2014			Activity		Effects of Foreign Currency Translation			As of March 31, 2015
Goodwill	$	2,091		$	—	$	(10	)	$	2,081
Accumulated impairment	(368		)	—		—			(368		)
Total	$	1,723		$	—	$	(10	)	$	1,713

Schedule Of Acquisition-Related Intangibles

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

	As of March 31, 2016							As of March 31, 2015
	Gross Carrying Amount		Accumulated Amortization			Acquisition- Related Intangibles, Net		Gross Carrying Amount		Accumulated Amortization			Acquisition- Related Intangibles, Net
Developed and core technology	$	412	$	(368	)	$	44	$	531	$	(439	)	$	92
Trade names and trademarks	106		(93		)	13		130		(111		)	19
Registered user base and other intangibles	5		(5		)	—		87		(87		)	—
Carrier contracts and related	85		(85		)	—		85		(85		)	—
Total	$	608	$	(551	)	$	57	$	833	$	(722	)	$	111

Schedule Of Amortization Of Intangible Assets

Amortization of intangibles for the fiscal years ended March 31, 2016, 2015 and 2014 are classified in the Consolidated Statement of Operations as follows (in millions):

	Year Ended March 31,
	2016		2015		2014
Cost of service and other	$	33	$	36	$	27
Cost of product	14		16		33
Operating expenses	7		14		16
Total	$	54	$	66	$	76

Schedule Of Future Amortization Of Acquisition-Related Intangibles

As of March 31, 2016, future amortization of acquisition-related intangibles that will be recorded in the Consolidated Statement of Operations is estimated as follows (in millions):

Fiscal Year Ending March 31,
2017	38
2018	17
2019	2
Total	$	57