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Leases (Tables)
3 Months Ended
Mar. 31, 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 March 31, 2019

2019
$
1.4

2020
0.5

2021
0.4

2022
0.1

2023
0.2

Thereafter
40.8

Total
43.4

Less: Interest
(18.6
)
ROUL
$
24.8