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Leases | 6 Months Ended
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Jun. 30, 2021
Leases [Abstract] |
Leases | Leases We have operating leases for our office and laboratory facilities, including our corporate headquarters, with terms that expire from 2024 through 2031. Certain of these lease agreements contain clauses for renewal at our option. As we were not reasonably certain to exercise any of these renewal options at commencement of the associated leases, no such options were recognized as part of our operating lease right-of-use, or ROU, assets or operating lease liabilities. In connection with our operating leases, in lieu of a cash security deposits, Wells Fargo Bank, N.A., issued letters of credit on our behalf, which are secured by deposits totaling $3.2 million. The following table presents supplemental operating lease information.
| Six Months Ended June 30,
(in millions, except weighted average data) | 2021 |  | 2020
Operating lease cost | $ | 7.3 |  |  | $ | 5.0 |
Cash paid for amounts included in the measurement of operating lease liabilities | $ | 5.5 |  |  | $ | 4.3 |
| June 30, 2021 |  | June 30, 2020
Weighted average remaining lease term | 9.2 years |  | 11.0 years
Weighted average discount rate | 5.3 | % |  | 5.8 | %
The following table presents approximate future minimum lease payments under operating leases.
(in millions) | June 30, 2021
Year ending December 31, 2021 (6 months remaining) | $ | 7.1 |
Year ending December 31, 2022 | 16.8 |
Year ending December 31, 2023 | 17.5 |
Year ending December 31, 2024 | 17.0 |
Year ending December 31, 2025 | 15.5 |
Thereafter | 85.4 |
Total operating lease payments | 159.3 |
Less accreted interest | 35.3 |
Total operating lease liabilities | 124.0 |
Less current operating lease liabilities included in other current liabilities | 15.0 |
Noncurrent operating lease liabilities | $ | 109.0 |

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=77888251 + Details
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