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Stock Based Compensation - Stock Based Compensation Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock based compensation expense | $ 16 | $ 13 | $ 46 | $ 37
Total stock based compensation capitalized | 0 | 0 | 1 | 1
Cost of providing services |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock based compensation expense | 3 | 3 | 10 | 9
Sales and marketing |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock based compensation expense | 2 | 1 | 5 | 5
General and administrative |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock based compensation expense | 9 | 8 | 28 | 21
Systems development and programming costs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Total stock based compensation expense | $ 2 | $ 1 | $ 3 | $ 2

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