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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
Components of Lease Cost The components of lease cost follow:
(in millions)202120202019
Operating lease cost
$26.3 $26.8 $24.9 
Variable lease cost
5.2 2.7 3.7 
Short-term lease cost5.0 3.9 2.7 
Total lease cost$36.5 $33.4 $31.3 
Summary of Lease Assets and Lease Liabilities
A summary of lease assets and liabilities follows:
(in millions)
December 31,
2021		December 31,
2020
Assets:
Operating lease right-of-use assets(1)
$81.4 $68.3 
Liabilities:
Operating lease liabilities - current(2)
24.0 21.5 
Operating lease liabilities - long-term(3)
64.4 53.1 
Total lease liabilities$88.4 $74.6 
(1)Included in other long-term assets.
(2)Included in accrued and other current liabilities.
(3)Included in other long-term liabilities.
Maturity of Lease Liabilities
Maturity of lease liabilities as of December 31, 2021, follow:
(in millions)
20222023202420252026ThereafterTotal
Lease payments$25.9 $19.3 $14.8 $10.9 $6.9 $20.0 $97.8 
Less: imputed interest(9.4)
Total lease liabilities$88.4 
Lease Term and Discount Rate
Lease Term and Discount Rate
December 31,
2021		December 31,
2020
Operating leases:
Weighted-average remaining lease term (in years)5.75.9
Weighted-average discount rate2.8 %3.3 %
Schedule of Supplemental Cash Flow Information
Supplemental Cash Flow Information
(in millions)202120202019
Operating lease liabilities - cash paid$24.3 $24.0 $22.4 
Operating lease liabilities - right-of-use assets obtained39.0 17.2 95.5 
(1)
(1)Includes $64.6 million related to the adoption of ASC 842.