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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 | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2018
Assets |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ 228 |  |  |  | $ 336 |  |  |  | $ 228 | $ 336 |  |
Restricted cash, cash equivalents and investments | 942 |  |  |  | 1,280 |  |  |  | 942 | 1,280 |  |
Unbilled revenues, net | 304 |  |  |  | 297 |  |  |  | 304 | 297 |  |
Prepaid expenses | 48 |  |  |  |  |  |  |  | 48 |  |  |
Other current assets | 59 |  |  |  |  |  |  |  | 59 |  |  |
Other assets | 78 |  |  |  | 55 |  |  |  | 78 | 55 |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable and other current liabilities | 45 |  |  |  |  |  |  |  | 45 |  |  |
Deferred taxes | 68 |  |  |  | 68 |  |  |  | 68 | 68 |  |
Other non-current liabilities | 18 |  |  |  | 14 |  |  |  | 18 | 14 |  |
Equity |  |  |  |  |  |  |  |  |  |  |  |
Accumulated deficit | (266) |  |  |  | (377) |  |  |  | (266) | (377) |  |
Revenue |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 3,503 | 3,275 | $ 3,060 |
Expense |  |  |  |  |  |  |  |  |  |  |  |
Sales and marketing |  |  |  |  |  |  |  |  | 182 | 187 | 174 |
Commissions expense |  |  |  |  |  |  |  |  | 22 |  |  |
Total expense |  |  |  |  |  |  |  |  | 3,252 | 3,058 | 2,936 |
Income before provision for income taxes |  |  |  |  |  |  |  |  | 241 | 200 | 104 |
Income tax expense |  |  |  |  |  |  |  |  | 49 | 22 | 43 |
Net income | $ 29 | $ 51 | $ 58 | $ 54 | $ 66 | $ 43 | $ 40 | $ 29 | $ 192 | $ 178 | $ 61 |
Basic net income per share (in dollars per share) | $ 0.41 | $ 0.73 | $ 0.82 | $ 0.77 | $ 0.95 | $ 0.62 | $ 0.58 | $ 0.42 | $ 2.72 | $ 2.57 | $ 0.88 |
Diluted net income per share (in dollars per share) | $ 0.40 | $ 0.71 | $ 0.80 | $ 0.75 | $ 0.92 | $ 0.60 | $ 0.56 | $ 0.41 | $ 2.65 | $ 2.49 | $ 0.85 |
Balance Using Previous Standard |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ 235 |  |  |  |  |  |  |  | $ 235 |  |  |
Restricted cash, cash equivalents and investments | 935 |  |  |  |  |  |  |  | 935 |  |  |
Unbilled revenues, net | 311 |  |  |  |  |  |  |  | 311 |  |  |
Prepaid expenses | 44 |  |  |  |  |  |  |  | 44 |  |  |
Other current assets | 49 |  |  |  |  |  |  |  | 49 |  |  |
Other assets | 67 |  |  |  |  |  |  |  | 67 |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable and other current liabilities | 48 |  |  |  |  |  |  |  | 48 |  |  |
Deferred taxes | 67 |  |  |  |  |  |  |  | 67 |  |  |
Other non-current liabilities | 22 |  |  |  |  |  |  |  | 22 |  |  |
Equity |  |  |  |  |  |  |  |  |  |  |  |
Accumulated deficit | (290) |  |  |  |  |  |  |  | (290) |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 3,501 |  |  |
Expense |  |  |  |  |  |  |  |  |  |  |  |
Commissions expense |  |  |  |  |  |  |  |  | 53 |  |  |
Total expense |  |  |  |  |  |  |  |  | 3,283 |  |  |
Income before provision for income taxes |  |  |  |  |  |  |  |  | 208 |  |  |
Income tax expense |  |  |  |  |  |  |  |  | 40 |  |  |
Net income |  |  |  |  |  |  |  |  | $ 168 |  |  |
Basic net income per share (in dollars per share) |  |  |  |  |  |  |  |  | $ 2.40 |  |  |
Diluted net income per share (in dollars per share) |  |  |  |  |  |  |  |  | $ 2.34 |  |  |
Increase (Decrease) | ASU 2014-09 |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | (7) |  |  |  |  |  |  |  | $ (7) |  |  |
Restricted cash, cash equivalents and investments | 7 |  |  |  |  |  |  |  | 7 |  |  |
Unbilled revenues, net | (7) |  |  |  |  |  |  |  | (7) |  |  |
Prepaid expenses | 4 |  |  |  |  |  |  |  | 4 |  |  |
Other current assets | 10 |  |  |  |  |  |  |  | 10 |  |  |
Other assets | 11 |  |  |  |  |  |  |  | 11 |  |  |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable and other current liabilities | 3 |  |  |  |  |  |  |  | 3 |  |  |
Deferred taxes | (1) |  |  |  |  |  |  |  | (1) |  |  |
Other non-current liabilities | 4 |  |  |  |  |  |  |  | 4 |  |  |
Equity |  |  |  |  |  |  |  |  |  |  |  |
Accumulated deficit | $ (24) |  |  |  |  |  |  |  | (24) |  |  | $ 2
Revenue |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 2 |  |  |
Expense |  |  |  |  |  |  |  |  |  |  |  |
Commissions expense |  |  |  |  |  |  |  |  | (31) |  |  |
Total expense |  |  |  |  |  |  |  |  | (31) |  |  |
Income before provision for income taxes |  |  |  |  |  |  |  |  | 33 |  |  |
Income tax expense |  |  |  |  |  |  |  |  | 9 |  |  |
Net income |  |  |  |  |  |  |  |  | $ 24 |  |  |
Basic net income per share (in dollars per share) |  |  |  |  |  |  |  |  | $ 0.32 |  |  |
Diluted net income per share (in dollars per share) |  |  |  |  |  |  |  |  | $ 0.31 |  |  |
Professional service revenues |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 487 | $ 458 | $ 447 |
Professional service revenues | Balance Using Previous Standard |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 485 |  |  |
Professional service revenues | Increase (Decrease) | ASU 2014-09 |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 2 |  |  |

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