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v3.10.0.1

Description of Business and Significant Accounting Policies - Impact of the Adoption of Topic 606 on the Condensed Consolidated Income Statements and Balance Sheets (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Jan. 01, 2018 | Dec. 31, 2017
Revenue |  |  |  |  |  |
Revenues | $ 875 | $ 818 | $ 2,586 | $ 2,427 |  |
Expense |  |  |  |  |  |
Commissions expense | 6 |  | 17 |  |  |
Total expense | 813 | 755 | 2,377 | 2,258 |  |
Income before provision for income taxes | 60 | 58 | 199 | 156 |  |
Income tax expense | 9 | 15 | 36 | 44 |  |
Net income | $ 51 | $ 43 | $ 163 | $ 112 |  |
Basic earnings per share (in dollars per share) | $ 0.73 | $ 0.62 | $ 2.32 | $ 1.62 |  |
Diluted earnings per share (in dollars per share) | $ 0.71 | $ 0.60 | $ 2.25 | $ 1.57 |  |
Assets |  |  |  |  |  |
Cash and cash equivalents | $ 237 |  | $ 237 |  |  | $ 336
Restricted cash, cash equivalents and investments | 621 |  | 621 |  |  | 1,280
Unbilled revenue (net of advance collections) | 306 |  | 306 |  |  | 297
Prepaid expenses and other current assets | 38 |  | 38 |  |  | 15
Other assets | 27 |  | 27 |  |  | 16
Liabilities |  |  |  |  |  |
Accounts payable and other current liabilities | 43 |  | 43 |  |  | 59
Deferred income taxes | 72 |  | 72 |  |  | 68
Other liabilities | 16 |  | 16 |  |  | 14
Equity |  |  |  |  |  |
Retained earnings | (273) |  | (273) |  |  | $ (377)
Professional service revenues |  |  |  |  |  |
Revenue |  |  |  |  |  |
Revenues | 119 | $ 112 | 363 | $ 341 |  |
Balance Using Previous Standard |  |  |  |  |  |
Revenue |  |  |  |  |  |
Revenues | 876 |  | 2,585 |  |  |
Expense |  |  |  |  |  |
Commissions expense | 13 |  | 38 |  |  |
Total expense | 819 |  | 2,398 |  |  |
Income before provision for income taxes | 55 |  | 177 |  |  |
Income tax expense | 8 |  | 31 |  |  |
Net income | $ 47 |  | $ 146 |  |  |
Basic earnings per share (in dollars per share) | $ 0.68 |  | $ 2.09 |  |  |
Diluted earnings per share (in dollars per share) | $ 0.66 |  | $ 2.03 |  |  |
Assets |  |  |  |  |  |
Cash and cash equivalents | $ 245 |  | $ 245 |  |  |
Restricted cash, cash equivalents and investments | 613 |  | 613 |  |  |
Unbilled revenue (net of advance collections) | 314 |  | 314 |  |  |
Prepaid expenses and other current assets | 29 |  | 29 |  |  |
Other assets | 16 |  | 16 |  |  |
Liabilities |  |  |  |  |  |
Accounts payable and other current liabilities | 46 |  | 46 |  |  |
Deferred income taxes | 70 |  | 70 |  |  |
Other liabilities | 20 |  | 20 |  |  |
Equity |  |  |  |  |  |
Retained earnings | (290) |  | (290) |  |  |
Balance Using Previous Standard | Professional service revenues |  |  |  |  |  |
Revenue |  |  |  |  |  |
Revenues | 120 |  | 362 |  |  |
ASU 2014-09 | Increase (Decrease) |  |  |  |  |  |
Revenue |  |  |  |  |  |
Revenues | (1) |  | 1 |  |  |
Expense |  |  |  |  |  |
Commissions expense | (7) |  | (21) |  |  |
Total expense | (6) |  | (21) |  |  |
Income before provision for income taxes | 5 |  | 22 |  |  |
Income tax expense | 1 |  | 5 |  |  |
Net income | $ 4 |  | $ 17 |  |  |
Basic earnings per share (in dollars per share) | $ 0.05 |  | $ 0.23 |  |  |
Diluted earnings per share (in dollars per share) | $ 0.05 |  | $ 0.22 |  |  |
Assets |  |  |  |  |  |
Cash and cash equivalents | $ (8) |  | $ (8) |  |  |
Restricted cash, cash equivalents and investments | 8 |  | 8 |  |  |
Unbilled revenue (net of advance collections) | (8) |  | (8) |  |  |
Prepaid expenses and other current assets | 9 |  | 9 |  |  |
Other assets | 11 |  | 11 |  |  |
Liabilities |  |  |  |  |  |
Accounts payable and other current liabilities | (3) |  | (3) |  |  |
Deferred income taxes | 2 |  | 2 |  |  |
Other liabilities | (4) |  | (4) |  |  |
Equity |  |  |  |  |  |
Retained earnings | 17 |  | 17 |  | $ 1 |
ASU 2014-09 | Increase (Decrease) | Professional service revenues |  |  |  |  |  |
Revenue |  |  |  |  |  |
Revenues | $ (1) |  | $ 1 |  |  |

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