PENSION PLANS AND RETIREMENT BENEFITS (Tables)

9 Months Ended

Sep. 30, 2022

Retirement Benefits [Abstract]

Components of Net Periodic Benefit (Income) Cost

	Pension Benefits				Other Postretirement Benefits
	Three Months Ended September 30,				Three Months Ended September 30,
	2022		2021		2022		2021
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	2.0	$	2.8	$	0.2	$	0.3
Interest cost	15.1		12.8		0.2		0.2
Expected return on plans’ assets	(34.3)		(35.6)		—		—
Amortization of prior service cost	—		(0.1)		—		—
Recognized actuarial loss	9.0		13.2		0.1		0.3
Net periodic benefit (income) cost	$	(8.2)	$	(6.9)	$	0.5	$	0.8

	Pension Benefits				Other Postretirement Benefits
	Nine Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Components of Net Periodic Benefit (Income) Cost	($ in millions)
Service cost	$	6.5	$	8.6	$	0.8	$	1.0
Interest cost	46.0		38.4		0.8		0.8
Expected return on plans’ assets	(102.8)		(106.7)		—		—
Amortization of prior service cost	(0.4)		(0.4)		0.1		0.1
Recognized actuarial loss	26.2		39.5		1.1		1.6
Net periodic benefit (income) cost	$	(24.5)	$	(20.6)	$	2.8	$	3.5