Deferred Revenue (Details) - USD ($) $ in Millions	Mar. 31, 2018	Mar. 31, 2017
Current:
Total deferred revenue (billed or collected) - current	$ 2,289	$ 2,222
Noncurrent:
Total deferred revenue (billed or collected) - noncurrent	820	794
Total deferred revenue (billed or collected)	3,109	3,016
Subscription and Maintenance
Current:
Total deferred revenue (billed or collected) - current	1,953	1,948
Noncurrent:
Total deferred revenue (billed or collected) - noncurrent	798	769
Professional Services
Current:
Total deferred revenue (billed or collected) - current	140	135
Noncurrent:
Total deferred revenue (billed or collected) - noncurrent	15	19
Software Fees and Other
Current:
Total deferred revenue (billed or collected) - current	196	139
Noncurrent:
Total deferred revenue (billed or collected) - noncurrent	$ 7	$ 6

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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