ACCUMULATED OTHER COMPREHENSIVE LOSS

12 Months Ended

Dec. 31, 2020

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

Schedule of Accumulated Other Comprehensive Loss

The changes in each component of AOCL for the years ended December 31, 2020, 2019 and 2018 were as follows:

Accumulated Other Comprehensive Loss	2020		2019		2018
In millions
Cumulative Translation Adjustment
Beginning balance	$	(56)	$	(57)	$	(59)
Unrealized gains (losses) on foreign currency translation	—		1		2
(Gains) losses reclassified from AOCL to net income 1	1		—		—
Other comprehensive income (loss), net of tax	1		1		2
Ending balance	$	(55)	$	(56)	$	(57)
Pension and Other Postretirement Benefits
Beginning balance	$	(1,609)	$	(1,504)	$	(1,293)
Gains (losses) arising during the period	(242)		(213)		(29)
Less: Tax (expense) benefit	57		51		7
Net gains (losses) arising during the period	(185)		(162)		(22)
Amortization and recognition of net loss 2	103		75		85
Less: Tax expense (benefit) 3	(24)		(18)		(20)
Net loss reclassified from AOCL to net income	79		57		65
Other comprehensive income (loss), net of tax	(106)		(105)		43
Reclassification of stranded tax effects 4	—		—		(254)
Ending balance	$	(1,715)	$	(1,609)	$	(1,504)
Total AOCL ending balance	$	(1,770)	$	(1,665)	$	(1,561)

1.Reclassified to "Sundry income (expense) - net."

2.These AOCL components are included in the computation of net periodic benefit cost of the Corporation's defined benefit pension and other postretirement benefit plans. See Note 17 for additional information.

3.Reclassified to "Provision for income taxes."

4.Amounts reclassified to retained earnings as a result of the adoption of ASU 2018-02.