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Leases (Tables)
 6 Months Ended
Jun. 30, 2019
Leases [Abstract]  
Lease Cost The components of lease cost follow:
(in millions)Three Months Ended
June 30, 2019		Six Months Ended
June 30, 2019
Operating lease cost
$6.8 $13.2 
Variable lease cost
1.8 3.3 
Short-term lease cost0.8 1.5 
Total lease cost$9.4 $18.0 
Summary of Lease Assets and Liabilities
A summary of lease assets and liabilities follows:
(in millions)
June 30,
2019
Assets:
Operating lease right-of-use assets1
$79.0 
Liabilities:
Operating lease liabilities - current2
21.6 
Operating lease liabilities - long-term3
63.3 
Total lease liabilities$84.9 
1.Included in other long-term assets.
2.Included in accrued liabilities and other.
3.Included in other long-term liabilities.
Maturity of Lease Liabilities
Maturity of lease liabilities as of June 30, 2019, follow:
(in millions)
Remainder of 201920202021202220232024ThereafterTotal
Lease payments$13.5 $20.2 $15.0 $11.1 $8.6 $6.4 $22.9 $97.7 
Less: imputed interest(12.8)
Total lease liabilities$84.9 

As previously disclosed in our 2018 Annual Report on Form 10-K and under the previous lease accounting standard, future minimum lease payments for non-cancelable operating leases in future years would have been as follows:
(in millions)20192020202120222023Thereafter
Future minimum lease payments$16.7 $10.8 $6.8 $4.9 $4.2 $5.1 
Lease Term and Discount Rate
Lease Term and Discount Rate
June 30,
2019
Operating leases:
Weighted-average remaining lease term (in years)
6.6
Weighted-average discount rate3.9 %