| Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
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| Cash and cash equivalents | 303 | 73 | 92 | 68 | 296 |
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| Funds held for customers | 9 | 25 | 15 | 21 | 30 |
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| Accounts Receivable, after Allowance for Credit Loss, Current | 77 | 77 | 103 | 142 | 164 |
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| Prepaid expenses and other current assets | 13 | 21 | 20 | 26 | 37 |
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| Investment Securities Available For Sale, Current, Excluding Amounts Included In Cash Equivalents | - | - | 11 | 10 | 9 |
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| Total current assets | 403 | 196 | 241 | 267 | 536 |
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| Property and equipment, net of accumulated depreciation | - | - | - | - | 178 |
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| Capitalized Computer Software, Net | 32 | 33 | 39 | 39 | 36 |
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| Goodwill and other intangible assets | - | - | - | - | 363 |
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| Deferred commissions | 12 | 13 | 15 | 21 | 27 |
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| Deferred income tax assets | 30 | 35 | 31 | 42 | 0 |
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| Operating lease right-of-use assets | - | 20 | 17 | 15 | 12 |
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| Other assets | 3 | 2 | 3 | 16 | 14 |
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| Total assets | 555 | 670 | 719 | 760 | 1,167 |
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| Current portion of long-term debt | 1 | - | 2 | 3 | - |
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| Accounts payable | 9 | 13 | 14 | 24 | 36 |
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| Accrued expenses | 19 | 23 | 38 | 45 | 35 |
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| Customer funds obligations | 9 | 23 | 12 | 18 | 27 |
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| Accrued salaries and benefits | 17 | 17 | 11 | 12 | 15 |
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| Accrued variable compensation | 22 | 26 | 24 | 34 | 46 |
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| Deferred revenue, current | 208 | 237 | 269 | 290 | 339 |
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| Operating Lease, Liability, Current | - | 4 | 4 | 4 | 4 |
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| Finance Lease, Liability, Current | - | 0 | 0 | 0 | 0 |
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| Business Combination, Contingent Consideration, Liability, Current | 1 | 0 | 6 | 12 | 35 |
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| Total current liabilities | 292 | 369 | 403 | 441 | 537 |
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| Deferred revenue, net of current portion | 15 | 12 | 10 | 3 | 5 |
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| Debt, net of current portion | 0 | - | 47 | 44 | 335 |
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| Operating Lease, Liability, Noncurrent | - | 24 | 20 | 17 | 13 |
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| Finance Lease, Liability, Noncurrent | - | 0 | 0 | 0 | 0 |
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| Business Combination, Contingent Consideration, Liability, Noncurrent | 9 | 11 | 8 | 3 | 87 |
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| Deferred income tax liabilities | - | - | - | - | 10 |
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| Deferred other liabilities | 9 | 3 | 0 | 0 | 0 |
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| Total liabilities | 329 | 440 | 489 | 507 | 987 |
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| Class A | 0 | 0 | 0 | 0 | 0 |
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| Class B | 0 | 0 | 0 | 0 | 0 |
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| Additional paid in capital | 207 | 223 | 245 | 275 | 278 |
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| Accumulated deficit | 22 | 25 | 13 | -1 | -53 |
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| Accumulated other comprehensive loss | -3 | -17 | -28 | -22 | -46 |
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| Total stockholders' equity | 225 | 230 | 230 | 253 | 179 |
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| Total liabilities and stockholders' equity | 555 | 670 | 719 | 760 | 1,167 |
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