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Leases (Tables)
 12 Months Ended
Dec. 31, 2020
Leases [Abstract]  
Schedule of assets and liabilities, lessee
Our ROUA and ROUL balances for the years ended December 31, 2020 and December 31, 2019 were as follows (in millions):

December 31, 2020December 31, 2019
ROUA(1)
$24.9 $25.2 
ROUL - current(2)
$1.6 $2.8 
ROUL - non-current(3)
$24.3 $22.8 
Total ROUL$25.9 $25.6 
(1) ROUA was recorded as part of Other Assets within Non-current assets at December 31, 2020 and 2019.
(2) ROUL - current was recorded as part of Accrued and other current liabilities within Current liabilities at December     31, 2020 and 2019.
(3) ROUL - non-current was recorded as Leases - Right of use liabilities as part of Non-current liabilities at December 31, 2020 and 2019
Schedule of maturities of operating lease liability balances
The undiscounted maturities of our operating lease liability balances are as follows (in millions):

YearAs of December 31, 2020
2021$3.4 
20223.0 
20232.7 
20242.7 
20252.7 
Thereafter29.1 
Total 43.6 
Less: Interest(17.7)
ROUL$25.9 
Schedule of lease, expense
Total operating expense includes the following (in millions):

December 31, 2020December 31, 2019
Operating leases expense4.7 4.9
Short term lease expense0.5 3.2
Total(1)
5.2 8.1
(1) Total lease expense is included in cost of goods sold and selling, general, and administrative expenses on     the Consolidated Statements of Operations.