ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Asset retirement obligation activity

The activities of our asset retirement obligations were as follows:

	December 31,
	2023		2022
Asset Retirement Obligation Activity	($ in millions)
Beginning balance	$	66.3	$	70.2
Accretion	3.3		3.8
Spending	(5.0)		(8.7)
Adjustments	8.2		1.0
Ending balance	$	72.8	$	66.3