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Stock Based Compensation - (Tables) | 3 Months Ended
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Mar. 31, 2021
Share-based Payment Arrangement [Abstract] |
Summary of RSU and RSA Activity Under Equity-Based Plans | The following tables summarize RSU and RSA activity for the three months ended March 31, 2021: Time-based RSUs and RSAs
| Total Number of RSUs | Total Number of RSAs | Total Number of Shares | Weighted-Average Grant Date Fair Value
Nonvested at December 31, 2020 | 1,230,071 |  | 30,026 |  | 1,260,097 |  | $ | 54.04 |
Granted | 456,421 |  | — |  | 456,421 |  | 83.11 |
Vested | (212,948) |  | (7,055) |  | (220,003) |  | 45.14 |
Forfeited | (47,908) |  | — |  | (47,908) |  | 56.14 |
Nonvested at March 31, 2021 | 1,425,636 |  | 22,971 |  | 1,448,607 |  | $ | 64.48 |
Performance-based RSUs and RSAs
| Total Number of RSUs | Total Number of RSAs | Total Number of Shares | Weighted-Average Grant Date Fair Value
Nonvested at December 31, 2020 | 167,127 |  | 16,052 |  | 183,179 |  | $ | 52.89 |
Granted | 232,815 |  | — |  | 232,815 |  | 68.27 |
Vested | (3,010) |  | (16,052) |  | (19,062) |  | 47.61 |
Forfeited | (9,459) |  | — |  | (9,459) |  | 52.86 |
Nonvested at March 31, 2021 | 387,473 |  | — |  | 387,473 |  | $ | 62.39 |
Stock-based Compensation Expense | Stock based compensation expense for stock based awards made to our employees pursuant to our equity plans were as follows:
|  |  | Three Months Ended March 31,
(in millions) |  |  |  | 2021 | 2020
Cost of providing services |  |  |  | $ | 3 |  | $ | 2 |
Sales and marketing |  |  |  | 1 |  | 2 |
General and administrative |  |  |  | 6 |  | 5 |
Systems development and programming costs |  |  |  | 1 |  | — |
Total stock based compensation expense |  |  |  | $ | 11 |  | $ | 9 |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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