| Dec 31, 2014 | Dec 31, 2015 | Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 | Dec 31, 2023 | Dec 31, 2024 |
|---|
| Net income (loss) | -19 | 0 | -18 | -155 | -62 | -25 | -53 | 0 | -130 | -159 | 23 |
|---|
| Depreciation and amortization | 13 | 31 | 43 | 36 | 35 | 32 | 49 | 147 | 216 | 241 | 59 |
|---|
| Stock-based compensation | 24 | 31 | 29 | 21 | 16 | 19 | 28 | 41 | 64 | 73 | 77 |
|---|
| Impairment of intangible assets | - | - | - | - | - | - | - | - | 3 | - | - |
|---|
| (Gain) loss on extinguishment of debt | - | - | - | - | - | - | - | - | - | 26 | -8 |
|---|
| Provision for (recovery of) doubtful accounts | - | - | - | 1 | 1 | 2 | -0 | 0 | -0 | 5 | 1 |
|---|
| Amortization of debt discount and issuance costs | - | - | - | - | - | - | - | 5 | 7 | 6 | 4 |
|---|
| Non-cash lease expense | - | - | - | - | - | -0 | -1 | -0 | 1 | -2 | -5 |
|---|
| Deferred income taxes | - | -5 | -7 | -2 | -0 | -1 | 1 | -99 | -9 | -2 | 0 |
|---|
| Unrealized foreign currency (gain) loss, net | 1 | 0 | 1 | -1 | 1 | 1 | 1 | 2 | 0 | -1 | 7 |
|---|
| Other items, net | - | - | - | - | - | - | - | 3 | - | 3 | 0 |
|---|
| Accounts receivable | 38 | 72 | -26 | -26 | 41 | 11 | 104 | 254 | 46 | 220 | 26 |
|---|
| Prepaid expenses and other assets | 2 | 1 | 3 | 0 | -5 | 0 | 10 | -1 | 4 | -1 | -2 |
|---|
| Accounts payable and accrued expenses | 30 | 93 | -33 | -1 | 27 | 16 | 75 | 285 | 91 | 295 | 97 |
|---|
| Other liabilities | -1 | -0 | 1 | -0 | -3 | 0 | 4 | 0 | -0 | -0 | 3 |
|---|
| Net cash provided by operating activities | 7 | 77 | 60 | 22 | -23 | 32 | -12 | 127 | 193 | 214 | 235 |
|---|
| Purchases of property and equipment | 11 | 20 | 23 | 32 | 11 | 11 | 14 | 18 | 31 | 27 | 33 |
|---|
| Capitalized internal use software development costs | 9 | 8 | 10 | 8 | 9 | 8 | 8 | 11 | 14 | 11 | 14 |
|---|
| Other investing activities | - | - | - | - | - | - | - | - | - | - | 0 |
|---|
| Mergers and acquisitions, net of indemnification claims holdback | 4 | 9 | 0 | 39 | - | 11 | -55 | 662 | 21 | - | - |
|---|
| Net cash used in investing activities | -23 | -73 | -37 | -93 | 28 | -23 | 33 | -691 | -65 | -37 | -48 |
|---|
| Proceeds from Issuance of Secured Debt | - | - | - | - | - | - | - | - | - | - | 413 |
|---|
| Repayment of the Term Loan B Facility from refinancing and repricing activities | - | - | - | - | - | - | - | - | - | - | 403 |
|---|
| Payment for debt issuance costs | - | - | - | - | - | - | - | 30 | - | - | 5 |
|---|
| Repayment of debt | - | - | - | - | - | - | - | - | - | - | 2 |
|---|
| Repurchase of Convertible Senior Notes | - | - | - | - | - | - | - | - | - | 166 | - |
|---|
| Proceeds from Stock Options Exercised | 3 | 14 | 14 | 0 | 0 | 1 | 14 | 9 | 2 | 2 | 1 |
|---|
| Proceeds from issuance of common stock under employee stock purchase plan | - | - | - | - | - | - | 2 | 4 | 4 | 4 | 4 |
|---|
| Taxes paid related to net share settlement | 2 | - | 6 | 2 | 2 | 2 | 8 | 6 | 14 | 12 | 22 |
|---|
| Purchase of treasury stock | - | - | - | - | - | - | - | 6 | 16 | - | 15 |
|---|
| Repayment of finance leases | - | - | - | - | - | - | - | 1 | 1 | 0 | - |
|---|
| Payment of indemnification claims holdback | - | - | - | - | - | - | - | - | 2 | 2 | - |
|---|
| Net cash used in financing activities | 84 | 15 | 10 | -1 | -1 | -0 | 7 | 678 | -30 | -178 | -29 |
|---|
| EFFECT OF EXCHANGE RATE CHANGES ON CASH, CASH EQUIVALENTS AND RESTRICTED CASH | - | - | - | - | -0 | 0 | 1 | -1 | -1 | 1 | -2 |
|---|
| CHANGE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH | - | - | - | - | 4 | 8 | 29 | 113 | 96 | -0 | 157 |
|---|
| Income Taxes Paid | - | - | - | - | - | - | - | 2 | 5 | 5 | 4 |
|---|
| Cash paid for interest | - | - | - | - | - | 0 | 0 | 13 | 26 | 37 | 37 |
|---|
| Capital Expenditures Incurred but Not yet Paid | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 2 | 1 | 2 | 7 |
|---|
| Capitalized stock-based compensation | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 3 | 2 | 2 |
|---|
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | - | - | - | - | - | 14 | 2 | 42 | 20 | 4 | 14 |
|---|
| Operating Lease Right-Of-Use Assets Reduction And Adjustment To Operating Lease Liabilities From Lease Terminations | - | - | - | - | - | - | - | - | - | - | 5 |
|---|
| Purchase consideration - indemnification claims holdback | - | - | - | - | - | - | - | 2 | 2 | - | - |
|---|
| Noncash or Part Noncash, Financing Activity | - | - | - | - | - | - | - | - | - | - | 312 |
|---|