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Environmental Matters (Tables)
 9 Months Ended
Sep. 30, 2023
Text Block [Abstract]  
Environmental Obligations Recognized by Company

The following table sets forth a summary of changes in the Company’s liability for Environmental Obligations for the nine months ended September 30, 2023 and 2022.

 

Environmental Obligations (millions)

 

 

September 30,

 

 

2023

 

 

2022

 

Total Balance at Beginning of Period

 

$

4.4

 

 

$

2.7

 

Additions

 

 

0.7

 

 

 

0.4

 

Less: Payments / Reductions

 

 

0.5

 

 

 

0.3

 

Total Balance at End of Period

 

 

4.6

 

 

 

2.8

 

Less: Current Portion

 

 

0.6

 

 

 

0.6

 

Noncurrent Balance at End of Period

 

$

4.0

 

 

$

2.2