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Employee Benefit Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
May 25, 2022 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 30, 2022 | Sep. 30, 2022 | Oct. 01, 2021 | Dec. 30, 2022 | Dec. 31, 2021 | Jan. 01, 2021
ESPP |  |  |  |  |  |  |  |  |
Maximum potential to vest |  |  |  |  | 25.00% | 25.00% |  |  |
Expenses relating to stock match |  |  |  |  |  |  | $ 11.7 | $ 9.5 | $ 6.7
Amended and Restated 2017 Equity Incentive Plan |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Increase in share reserve under 2017 plan (in shares) | 28,500,000 |  |  |  |  |  |  |  |
Number of shares available for grant (in shares) |  |  |  | 31,971,047 |  |  | 31,971,047 |  |
Reduction in share reserve after stock option or stock appreciation award (in shares) |  |  |  |  |  |  | 1 |  |
Reduction in share reserve after all other awards (in shares) |  |  |  |  |  |  | 2 |  |
Minimum |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Number of months following change in control in which an employee was terminated |  |  |  |  |  |  | 1 month |  |
Maximum |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Number of months following change in control in which an employee was terminated |  |  |  |  |  |  | 13 months |  |
Stock options |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Expiration period |  |  |  |  |  |  | 7 years |  |
Total unrecognized compensation expense |  |  |  | $ 16.6 |  |  | $ 16.6 |  |
Unrecognized compensation expense weighted-average period for recognition |  |  |  |  |  |  | 2 years 2 months 12 days |  |
Intrinsic value of options exercised |  |  |  |  |  |  | $ 36.5 | 76.0 | 106.5
Cash received from option exercises and purchases under the ESPP |  |  |  |  |  |  | $ 13.9 | $ 14.8 | $ 26.9
Stock options | Share-based Payment Arrangement, Employee |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  |  |  |  | 4 years |  |
Stock options | Share-based Payment Arrangement, Nonemployee |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  |  |  |  | 1 year |  |
Restricted stock units |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Total unrecognized compensation expense |  |  |  | $ 183.6 |  |  | $ 183.6 |  |
Unrecognized compensation expense weighted-average period for recognition |  |  |  |  |  |  | 2 years 10 months 24 days |  |
Number of awards granted (in shares) |  |  |  |  |  |  | 7,933,000 |  |
Number of awards (in shares) |  |  |  | 11,294,000 |  |  | 11,294,000 | 6,828,000 |
Restricted stock units | Share-based Payment Arrangement, Employee |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  |  |  |  | 4 years |  |
Restricted stock units | Share-based Payment Arrangement, Nonemployee |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  |  |  |  | 1 year |  |
TSR-Based Restricted Stock Units |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Number of awards granted (in shares) |  | 1,003,482 |  |  |  |  |  |  |
Maximum potential to vest |  | 175.00% |  |  |  |  |  |  |
TSR-Based Restricted Stock Units | Share-based Payment Arrangement, Tranche One |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Award vesting period |  | 1 year |  |  |  |  |  |  |
Vesting award percentage |  | 50.00% |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Number of shares available for grant (in shares) |  |  |  | 2,561,567 |  |  | 2,561,567 |  |
Discount rate from market value on purchase date (as a percent) |  |  |  |  |  |  | 85.00% |  |
Discount rate from market value on offering date (as a percent) |  |  |  |  |  |  | 85.00% |  |
Purchase period |  |  |  |  |  |  | 6 months |  |
Common stock issued (in shares) |  |  |  |  |  |  | 606,787 | 536,226 | 534,419
Average price per share (in dollars per share) |  |  |  | $ 16.63 |  |  | $ 16.63 | $ 17.76 | $ 14.55
Proceeds from employee stock purchase plan |  |  |  |  |  |  | $ 10.1 | $ 9.5 | $ 7.8
Performance stock units |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Award vesting period |  |  | 1 year |  |  |  |  |  |
Unrecognized compensation expense weighted-average period for recognition |  |  |  |  |  |  | 2 years 3 months 18 days |  |
Number of awards granted (in shares) |  |  | 1,027,650 |  |  |  | 0 |  |
Maximum potential to vest |  |  | 200.00% | 100.00% |  |  |  |  | 200.00%
Additional shares to be earned (in shares) |  |  | 2,055,300 |  |  |  |  |  | 4,655,680
Number of awards (in shares) |  |  |  | 4,964,000 |  |  | 4,964,000 | 6,310,000 |
Performance stock units | Achieved |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Number of awards (in shares) |  |  |  | 869,502 |  |  | 869,502 |  |
Performance stock units | Probable |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Total unrecognized compensation expense |  |  |  | $ 11.0 |  |  | $ 11.0 |  |
Performance stock units | Not Probable |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Total unrecognized compensation expense |  |  |  | $ 79.5 |  |  | $ 79.5 |  |
Performance stock units | Share-based Payment Arrangement, Tranche One |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Vesting award percentage |  |  | 50.00% |  |  |  |  |  |
Performance Shares, Clinical Trial Results |  |  |  |  |  |  |  |  |
ESPP |  |  |  |  |  |  |  |  |
Number of awards granted (in shares) |  |  |  |  |  |  |  |  | 2,327,840

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