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Description of Business and Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Impact of the Adoption of Topic 606 on the Condensed Consolidated Income Statements | The impact from the adoption of ASC Topic 606 to our condensed consolidated income statements and balance sheets is as follows:
(in millions) | As of and for the Three Months Ended March 31, 2018 | Balance Using Previous Standard | Increase (Decrease)
Income statement |  |  |
Revenue |  |  |
Professional service revenues | $ | 129 |  | $ | 126 |  | $ | 3 |
Total revenues | 861 |  | 858 |  | 3 |
Expense |  |  |
Sales and marketing expense |  |  |  |
Commissions expense | 4 |  | 13 |  | (9 | )
Total expense | 790 |  | 799 |  | (9 | )
Income before provision for income taxes | 67 |  | 56 |  | 11 |
Income tax expense | 13 |  | 11 |  | 2 |
Net income | 54 |  | 45 |  | 9 |
Basic earnings per share | 0.77 |  | 0.64 |  | 0.13 |
Diluted earnings per share | 0.75 |  | 0.62 |  | 0.13 |
Balance sheet |  |  |
Assets |  |  |  |
Unbilled revenue (net of advance collections) | $ | 286 |  | $ | 291 |  | $ | (5 | )
Prepaid expenses and other current assets | 22 |  | 14 |  | 8 |
Other assets | 18 |  | 14 |  | 4 |
Liabilities |  |  |  |
Accounts payable and other current liabilities | 46 |  | 47 |  | (1 | )
Other liabilities | 10 |  | 12 |  | (2 | )
Equity |  |  |  |
Retained earnings | (332 | ) | (342 | ) | 10 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045 + Details
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