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Leases (Notes) | 12 Months Ended
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Dec. 31, 2020
Leases [Abstract] |
Lease Disclosure | 4. Leases Components of lease expense for the year ended December 31, 2020 and 2019 were as follows (in millions):
|  | 2020 |  | 2019
Operating lease expense |  | $ | 32.9 |  |  | $ | 32.1 |
Short-term lease expense |  | 6.6 |  |  | 2.1 |
Variable lease expense |  | 6.4 |  |  | 5.8 |
Total lease expense |  | $ | 45.9 |  |  | $ | 40.0 |
Supplemental information related to leases for December 31, 2020 and 2019 (in millions):
|  | 2020 |  | 2019
Weighted-average remaining lease term of operating leases |  | 3.7 years |  | 4.2 years
Weighted-average discount rate of operating leases |  | 3.91 | % |  | 4.26 | %
Cash paid for operating lease liabilities |  | $ | 34.0 |  | $ | 32.1
Maturities of operating lease liabilities at December 31, 2020 (in millions):
2021 |  | $ | 32.4 |
2022 |  | 25.9 |
2023 |  | 20.1 |
2024 |  | 12.7 |
2025 |  | 5.4 |
Thereafter |  | 2.7 |
Total future minimum lease payments |  | 99.2 |
Less: imputed interest |  | 6.9 |
Total operating lease liabilities |  | $ | 92.3 |
The Company has operating leases for corporate offices, branch offices and data centers. Two of these properties were owned indirectly in part by certain board members and an executive of the Company until they were sold to an unrelated party in June 2020. Rent expense for these properties for the period they were owned in part by related parties was $0.4 million, $1.2 million and $1.3 million for the years ended December 31, 2020, 2019 and 2018. At December 31, 2020, the Company did not have any significant leases that had not yet commenced.

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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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