| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Cash flows from operating activities | | | | | | | |
| Net loss | -55.4 | -139.1 | -224.7 | -68.8 | -64.1 | -38.5 | -40.4 |
| |
| Adjustments to reconcile net loss to net cash provided by operating activities: | | | | | | | |
| Depreciation and amortization | 14.9 | 18.7 | 22.6 | 24.3 | 34.6 | 19.4 | 7.6 |
| Stock-based compensation expense | 53.4 | 47.5 | 40.2 | 37.6 | 30.2 | 10.9 | 8.5 |
| Amortization of debt discount and issuance costs | 2.0 | 3.9 | 10.2 | 0.3 | | | |
| Unrealized (gain) loss on foreign currency exchange | 6.0 | 3.5 | -0.2 | | | | |
| Accretion on short-term investments | -0.3 | | | | | | |
| Amortization of creator signing fees | 1.2 | 2.8 | 8.6 | 10.9 | 7.1 | 4.3 | 2.7 |
| Adjustments related to creator advances, creator signing fees, and allowance for credit losses | -2.7 | 2.8 | 29.9 | | | | |
| Provision for chargebacks and refunds | | | | 2.4 | 2.7 | 0.9 | 0.9 |
| Other | 0.8 | 0.7 | 3.5 | -0.3 | | | |
| Changes in operating assets and liabilities: | | | | | | | |
| Accounts receivable | -2.2 | -0.6 | -2.5 | -0.3 | -2.1 | -0.8 | -1.4 |
| Funds receivable | -25.6 | -8.2 | 43.7 | 3.8 | -6.8 | -18.1 | -9.9 |
| Creator signing fees and creator advances | 4.4 | 6.2 | -0.1 | | | | |
| Prepaid expenses and other assets | 4.7 | -8.3 | 4.9 | 1.9 | -5.6 | -4.3 | -1.9 |
| Accounts payable, creators | 31.4 | 97.9 | -117.2 | 36.2 | 24.5 | 52.8 | 37.1 |
| Accounts payable | -0.1 | -0.8 | 0.2 | 0.7 | -0.5 | 0.4 | 0.2 |
| Chargebacks and refunds reserve | -16.4 | -18.3 | -30.4 | | | | |
| Accrued compensation and benefits | 0.7 | 6.9 | -2.4 | 0.8 | 1.8 | -0.3 | 0.0 |
| Accrued taxes | -3.2 | 6.1 | -3.2 | -2.8 | 5.0 | 3.6 | -1.3 |
| Operating lease liabilities | -4.3 | -5.3 | -9.7 | -9.1 | | | |
| Other accrued liabilities | -12.3 | 15.0 | -8.0 | 3.6 | 4.3 | 0.7 | 3.9 |
| Net cash provided by operating activities | 8.6 | 85.8 | -158.0 | 30.0 | 7.2 | 29.8 | 2.8 |
| |
| Cash flows from investing activities | | | | | | | |
| Purchase of short-term investments | -83.9 | | | | | | |
| Purchases of property and equipment | -1.4 | -1.0 | -1.7 | -5.9 | -5.4 | -2.5 | -3.0 |
| Capitalized internal-use software development costs | -3.0 | -1.5 | -4.6 | -7.7 | -7.2 | -6.1 | -5.5 |
| Cash paid for acquisitions | -1.1 | | -6.4 | | 12.6 | -132.0 | -1.7 |
| Net cash used in investing activities | -89.5 | -2.5 | -12.7 | -13.6 | 0.0 | -140.7 | -10.2 |
| |
| Cash flows from financing activities | | | | | | | |
| Proceeds from exercise of stock options | 3.1 | 18.5 | 19.3 | 40.7 | 8.1 | 1.8 | 2.9 |
| Taxes paid related to net share settlement of equity awards | -6.6 | -13.7 | -5.5 | -2.4 | -9.0 | | |
| Proceeds from issuance of common stock under ESPP | | | | | 241.0 | | |
| Net cash used in financing activities | -2.1 | 51.2 | 255.0 | -32.8 | 240.1 | 159.5 | 2.3 |
| Effect of exchange rate changes on cash, cash equivalents and restricted cash | -13.0 | -6.8 | 1.1 | | | | |
| Net (decrease) increase in cash, cash equivalents and restricted cash | -96.0 | 127.7 | 85.5 | | | | |
| |
| Cash, cash equivalents and restricted cash | | | | | | | |
| |
| Supplemental cash flow data | | | | | | | |
| Interest paid | 9.2 | 9.6 | 6.8 | 10.7 | 7.6 | 0.9 | |
| Income taxes paid, net of refunds | 0.7 | 0.1 | 0.8 | 1.1 | 0.2 | 0.1 | 0.1 |
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| Non-cash investing and financing activities | | | | | | | |