POSTRETIREMENT BENEFIT PLANS (Tables)

9 Months Ended

Sep. 30, 2024

Retirement Benefits [Abstract]

Components of Net Periodic Expense

Components of Expense (Income)	For the three months ended September 30
	Principal Pension Plans				Other Pension Plans				OPEB
	2024		2023		2024		2023		2024		2023
Service cost – Operating	$	7	$	8	$	6	$	6	$	2	$	2
Interest cost	227		237		50		53		14		15
Expected return on plan assets	(284)		(292)		(64)		(65)		—		—
Amortization of net loss (gain)	(19)		(30)		5		2		(15)		(16)
Amortization of prior service cost (credit)	2		1		—		(1)		(22)		(22)
Curtailment loss (gain)	—		17		—		—		—		—
Non-operating	$	(74)	$	(67)	$	(9)	$	(11)	$	(23)	$	(23)
Net periodic expense (income)	$	(67)	$	(58)	$	(3)	$	(5)	$	(21)	$	(21)

	For the nine months ended September 30
	Principal Pension Plans				Other Pension Plans				OPEB Plans
	2024		2023		2024		2023		2024		2023
Service cost – Operating	$	21	$	25	$	18	$	18	$	6	$	6
Interest cost	681		715		150		157		41		45
Expected return on plan assets	(851)		(878)		(190)		(192)		—		—
Amortization of net loss (gain)	(57)		(96)		15		7		(45)		(48)
Amortization of prior service cost (credit)	6		2		—		(3)		(66)		(66)
Curtailment loss (gain)	—		17		—		—		—		—
Non-operating	$	(221)	$	(240)	$	(25)	$	(31)	$	(70)	$	(69)
Net periodic expense (income)	$	(200)	$	(215)	$	(7)	$	(13)	$	(64)	$	(63)