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Cash Flow Information (Tables)
 3 Months Ended
Mar. 31, 2020
Supplemental Cash Flow Elements [Abstract]  
ROU Assets
The following table presents ROU assets obtained in exchange for lease obligations (in millions):
 
 
Three Months Ended March 31,
 
 
2020
 
2019
ROU assets obtained in exchange for lease obligations:
 
 
 
 
Operating leases, initial recognition
 
$
0.1

 
$
4.3

Operating leases, modifications and remeasurements
 
$
11.9

 
$
0.7

Finance leases, initial recognition
 
$
10.0

 
$
—

Finance leases, modifications and remeasurements
 
$
(1.5
)
 
$
—