Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenue:
Subscription and maintenance	$ 826	$ 824	$ 1,643	$ 1,650
Professional services	75	75	150	152
Software fees and other	133	119	266	215
Total revenue	1,034	1,018	2,059	2,017
Expenses:
Costs of licensing and maintenance	73	66	144	134
Cost of professional services	74	73	147	148
Amortization of capitalized software costs	67	59	137	125
Selling and marketing	244	235	490	477
General and administrative	97	84	204	172
Product development and enhancements	161	136	319	284
Depreciation and amortization of other intangible assets	27	18	53	38
Other expenses, net	9	27	20	27
Total expenses before interest and income taxes	752	698	1,514	1,405
Income before interest and income taxes	282	320	545	612
Interest expense, net	24	14	49	29
Income before income taxes	258	306	496	583
Income tax expense	74	94	134	173
Net income	$ 184	$ 212	$ 362	$ 410
Basic income per common share:
Basic income per common share (in dollars per share)	$ 0.44	$ 0.50	$ 0.86	$ 0.98
Basic weighted average shares used in computation	415	414	415	414
Diluted income per common share:
Diluted income per common share (in dollars per share)	$ 0.44	$ 0.50	$ 0.86	$ 0.98
Diluted weighted average shares used in computation	416	415	416	415

The amount of amortization of deferred charges applied against earnings during the period.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Cost of generating revenue from multiple-deliverable arrangements that include licensing fees and maintenance revenue. Licensing revenue is consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. Maintenance revenue is derived from maintenance services provided under contracts or arrangements with clients. Services may include the maintenance of software, plant and equipment, and facilities.