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Leases (Tables)
9 Months Ended
Sep. 30, 2019
Leases [Abstract]  
Lessee, Operating Lease, Liability, Maturity
The undiscounted maturities of our operating lease liability balances are as follows (in millions):

Year
As of September 30, 2019
2019
$

2020
1.6

2021
0.5

2022
0.9

2023
0.2

Thereafter
38.5

Total
41.7

Less: Interest
(17.0
)
ROUL
$
24.7