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Leases (Tables)
 3 Months Ended
Mar. 31, 2019
Leases [Abstract]  
Lease Cost The components of lease cost for the three months ended March 31, follow:
(in millions)
2019
Operating lease cost
$6.4 
Variable lease cost
1.5 
Short-term lease cost0.7 
Total lease cost$8.6 
Summary of Lease Assets and Liabilities
A summary of lease assets and liabilities follows:
(in millions)
March 31,
2019
Assets:
Operating lease right-of-use assets1
$69.6 
Liabilities:
Operating lease liabilities - current2
21.9 
Operating lease liabilities - long-term3
51.8 
Total lease liabilities$73.7 
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 March 31, 2019, follow:
(in millions)
Remainder of 201920202021202220232024ThereafterTotal
Lease payments$19.2 $18.5 $12.9 $9.3 $7.6 $5.3 $9.1 $81.9 
Less: imputed interest(8.2)
Total lease liabilities$73.7 

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
March 31,
2019
Operating leases:
Weighted-average remaining lease term (in years)
5.0
Weighted-average discount rate3.9 %