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Leases
 12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
LEASES LEASES
We have operating leases for offices, research and development facilities and data centers. Our leases have remaining terms that range from less than one year to approximately six years, some of which include one or more options to renew, with renewal terms of up to six years. Unless and until we are reasonably certain we will exercise these renewal options, we do not include renewal options in our lease terms for calculating our lease liability, as the renewal options allow us to maintain operational flexibility. Our finance leases were not material to our consolidated financial statements.

The components of lease expense were as follows (in millions):
Year Ended December 31,
202120202019
Operating lease expense$26.5 $18.5 $15.3 
Variable lease expense (1)
3.1 2.3 2.6 
Short-term lease expense3.7 3.8 3.2 
Total lease expense$33.3 $24.6 $21.1 
(1) Variable lease expense for the year ended December 31, 2021, 2020 and 2019 predominantly included common area maintenance charges and parking expense.
Supplemental balance sheet information related to our operating leases was as follows (in millions, except lease term and discount rate):
 ClassificationDecember 31,
2021		December 31,
2020
Operating lease ROU assets – non-currentOther assets$65.1 $49.3 
Operating lease liabilities – currentAccrued liabilities$26.3 $19.1 
Operating lease liabilities – non-currentOther liabilities40.5 34.0 
Total operating lease liabilities$66.8 $53.1 
Weighted average remaining lease term in years – operating leases3.03.5
Weighted average discount rate – operating leases2.1 %3.2 %

Supplemental cash flow information related to leases was as follows (in millions):
 Year Ended December 31,
 202120202019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows used for operating leases$25.8 $18.9 $16.2 

Maturities of operating lease liabilities as of December 31, 2021 were as follows (in millions):
Year Ending December 31,Amount
2022$27.3 
202320.5 
202414.0 
20255.1 
20261.6 
Thereafter0.4 
Total lease payments$68.9 
Less imputed interest(2.1)
Total$66.8 

As of December 31, 2021, we had additional minimum lease payments of $11.4 million relating to operating leases that had been signed but had not yet commenced. These leases will commence during 2022 and will have lease terms of approximately one to six years.
LEASES LEASES
We have operating leases for offices, research and development facilities and data centers. Our leases have remaining terms that range from less than one year to approximately six years, some of which include one or more options to renew, with renewal terms of up to six years. Unless and until we are reasonably certain we will exercise these renewal options, we do not include renewal options in our lease terms for calculating our lease liability, as the renewal options allow us to maintain operational flexibility. Our finance leases were not material to our consolidated financial statements.

The components of lease expense were as follows (in millions):
Year Ended December 31,
202120202019
Operating lease expense$26.5 $18.5 $15.3 
Variable lease expense (1)
3.1 2.3 2.6 
Short-term lease expense3.7 3.8 3.2 
Total lease expense$33.3 $24.6 $21.1 
(1) Variable lease expense for the year ended December 31, 2021, 2020 and 2019 predominantly included common area maintenance charges and parking expense.
Supplemental balance sheet information related to our operating leases was as follows (in millions, except lease term and discount rate):
 ClassificationDecember 31,
2021		December 31,
2020
Operating lease ROU assets – non-currentOther assets$65.1 $49.3 
Operating lease liabilities – currentAccrued liabilities$26.3 $19.1 
Operating lease liabilities – non-currentOther liabilities40.5 34.0 
Total operating lease liabilities$66.8 $53.1 
Weighted average remaining lease term in years – operating leases3.03.5
Weighted average discount rate – operating leases2.1 %3.2 %

Supplemental cash flow information related to leases was as follows (in millions):
 Year Ended December 31,
 202120202019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows used for operating leases$25.8 $18.9 $16.2 

Maturities of operating lease liabilities as of December 31, 2021 were as follows (in millions):
Year Ending December 31,Amount
2022$27.3 
202320.5 
202414.0 
20255.1 
20261.6 
Thereafter0.4 
Total lease payments$68.9 
Less imputed interest(2.1)
Total$66.8 

As of December 31, 2021, we had additional minimum lease payments of $11.4 million relating to operating leases that had been signed but had not yet commenced. These leases will commence during 2022 and will have lease terms of approximately one to six years.