Condensed Consolidated Statements of Operations (Unaudited) (USD $)
In Millions, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Revenue:        
Subscription and maintenance $ 892 $ 929 $ 2,709 $ 2,773
Professional services 90 94 268 289
Software fees and other 109 105 262 266
Total revenue 1,091 1,128 3,239 3,328
Expenses:        
Costs of licensing and maintenance 74 77 217 216
Cost of professional services 84 88 253 264
Amortization of capitalized software costs 62 69 204 204
Selling and marketing 283 281 782 798
General and administrative 90 95 269 277
Product development and enhancements 143 144 443 418
Depreciation and amortization of other intangible assets 31 40 99 113
Other expenses, net 6 13 21 153
Total expenses before interest and income taxes 773 807 2,288 2,443
Income from continuing operations before interest and income taxes 318 321 951 885
Interest expense, net 12 15 38 39
Income from continuing operations before income taxes 306 306 913 846
Income tax expense 88 81 248 60
Income from continuing operations 218 225 665 786
Income from discontinued operations, net of income taxes 4 7 30 21
Net income $ 222 $ 232 $ 695 $ 807
Basic income per common share:        
Income from continuing operations (in dollars per share) $ 0.49 $ 0.50 $ 1.50 $ 1.74
Income from discontinued operations (in dollars per share) $ 0.01 $ 0.01 $ 0.07 $ 0.04
Net income (in dollars per share) $ 0.50 $ 0.51 $ 1.57 $ 1.78
Basic weighted average shares used in computation 440 446 440 448
Diluted income per common share:        
Income from continuing operations (in dollars per share) $ 0.49 $ 0.50 $ 1.49 $ 1.73
Income from discontinued operations (in dollars per share) $ 0.01 $ 0.01 $ 0.07 $ 0.04
Net income (in dollars per share) $ 0.50 $ 0.51 $ 1.56 $ 1.77
Diluted weighted average shares used in computation 441 448 441 449