POSTRETIREMENT BENEFIT PLANS (Tables)

6 Months Ended

Jun. 30, 2024

Retirement Benefits [Abstract]

Components of Net Periodic Expense

Components of Expense (Income)	For the three months ended June 30
	Principal Pension Plans				Other Pension Plans				OPEB
	2024		2023		2024		2023		2024		2023
Service cost – Operating	$	7	$	9	$	6	$	6	$	2	$	2
Interest cost	227		238		50		53		14		15
Expected return on plan assets	(284)		(293)		(63)		(64)		—		—
Amortization of net loss (gain)	(19)		(35)		5		3		(15)		(16)
Amortization of prior service cost (credit)	2		—		—		(1)		(22)		(22)
Non-operating	$	(74)	$	(90)	$	(8)	$	(10)	$	(23)	$	(23)
Net periodic expense (income)	$	(67)	$	(81)	$	(2)	$	(4)	$	(21)	$	(21)

	For the six months ended June 30
	Principal Pension Plans				Other Pension Plans				OPEB Plans
	2024		2023		2024		2023		2024		2023
Service cost – Operating	$	14	$	17	$	12	$	12	$	4	$	4
Interest cost	454		478		100		105		27		30
Expected return on plan assets	(567)		(586)		(126)		(127)		—		—
Amortization of net loss (gain)	(38)		(66)		10		5		(30)		(32)
Amortization of prior service cost (credit)	4		—		—		(2)		(44)		(44)
Non-operating	$	(147)	$	(174)	$	(16)	$	(20)	$	(47)	$	(46)
Net periodic expense (income)	$	(133)	$	(157)	$	(4)	$	(8)	$	(43)	$	(42)