Intangible Assets

A summary of amortizable intangible assets is as follows:



	As of
	March 28, 2014
(Amounts in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Outsourcing contract costs	$	1,465	$	1,038	$	427
Software	2,330		1,680		650
Customer and other intangible assets	588		315		273
Total intangible assets	$	4,383	$	3,033	$	1,350



	As of
	March 29, 2013
(Amounts in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Outsourcing contract costs	$	1,473	$	968	$	505
Software	2,134		1,523		611
Customer and other intangible assets	512		281		231
Total intangible assets	$	4,119	$	2,772	$	1,347

Amortization expense for the years ended March 28, 2014, March 29, 2013, and March 30, 2012 was $402 million, $414 million, and $441 million, respectively, including reductions of revenue for amortization of outsourcing contract cost premiums of $34 million, $40 million, and $53 million and for amortization of contract related intangible asset of $11 million, $11 million and $3 million in each of the respective years (see Note 1).

Estimated amortization related to intangible assets, including amortization of contract cost premium, as of March 28, 2014, for fiscal 2015 through fiscal 2019, is as follows: $375 million, $282 million, $216 million, $166 million, and $139 million, respectively.

Purchased and internally developed software, net of accumulated amortization, consisted of the following:



(Amounts in millions)	March 28, 2014		March 29, 2013
Purchased software	$	287	$	297
Internally developed commercial software	308		304
Internally developed internal-use software	55		10
Total	$	650	$	611

Amortization expense related to purchased software was $130 million, $143 million, and $149 million, for the years ended March 28, 2014, March 29, 2013, and March 30, 2012, respectively. Amortization expense related to internally developed commercial software was $56 million, $53 million, and $47 million, for the years ended March 28, 2014, March 29, 2013, and March 30, 2012, respectively. Amortization expense related to internally developed internal-use software was $2 million, $2 million, and $4 million, for the years ended March 28, 2014, March 29, 2013, and March 30, 2012, respectively.

During fiscal 2012, the Company recorded $75 million as an impairment of its intangible assets, primarily due to performance issues on certain long-term outsourcing contracts within its GIS segment. The intangible assets impacted included primarily, software and capitalized transition costs. The Company used the income approach technique to fair value the assets. The unobservable inputs used were based on Company specific information and included, primarily, estimates of revenue and cost growth rates, profit margins and discount rates. The impairment was recorded as a part of cost of services.