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Leases
 6 Months Ended
Jun. 30, 2021
Leases [Abstract]  
Leases Leases
Our operating leases primarily consist of office and data center space expiring at various dates through November 2036. As of June 30, 2021, operating leases have a remaining weighted average lease term of 7.7 years and our operating lease liabilities were measured using a weighted average discount rate of 5.0%.
The components of operating lease expense were as follows:
Three Months EndedSix Months Ended
 June 30, 2021June 30, 2020June 30, 2021June 30, 2020
Operating lease costs$12.4 $13.9 $24.3 $27.6 
Variable lease costs2.1 2.4 4.8 4.7 
Sublease income
(0.8)(0.9)(1.6)(1.8)
$13.7 $15.4 $27.5 $30.5