ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)

9 Months Ended

Sep. 30, 2023

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of components of accumulated other comprehensive loss

Components of accumulated other comprehensive loss
(in millions)	Pension and Other Benefit Liabilities		Other		Tax Effect		Total
Balance at January 1, 2023	$	(6,624)	$	41	$	782	$	(5,801)
Changes in value	—		(1)		—		(1)
Reclassifications into earnings(1)	185		—		(43)		142
Balance at September 30, 2023	$	(6,439)	$	40	$	739	$	(5,660)

Balance at January 1, 2022	$	(8,355)	$	41	$	1,184	$	(7,130)
Reclassifications into earnings(1)	240		—		(56)		184
Balance at September 30, 2022	$	(8,115)	$	41	$	1,128	$	(6,946)

(1)Amounts reclassified from accumulated other comprehensive loss for pension and other benefit liabilities are recorded in pension and related (expense)/benefit in non-operating expense in our income statement.