Accumulated Other Comprehensive Loss (Tables)

3 Months Ended

Mar. 31, 2020

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

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

A summary of the changes in each component of Accumulated other comprehensive loss, net of tax for the quarters ended March 31, 2020 and 2019 is provided below:

(dollars in millions)	Foreign Currency Translation		Defined Benefit Pension and Post- retirement Plans		Unrealized Hedging (Losses) Gains		Accumulated Other Comprehensive (Loss) Income
Quarter Ended March 31, 2020
Balance at December 31, 2019	$	(3,211)	$	(6,772)	$	(166)	$	(10,149)
Other comprehensive (loss) income before reclassifications, net	(1,445)		8		(403)		(1,840)
Amounts reclassified, pre-tax	—		102		29		131
Tax benefit (expense)	9		(31)		92		70
Balance at March 31, 2020	$	(4,647)	$	(6,693)	$	(448)	$	(11,788)

(dollars in millions)	Foreign Currency Translation		Defined Benefit Pension and Post- retirement Plans		Unrealized Hedging (Losses) Gains		Accumulated Other Comprehensive (Loss) Income
Quarter ended March 31, 2019
Balance at December 31, 2018	$	(3,442)	$	(5,718)	$	(173)	$	(9,333)
Other comprehensive income (loss) before reclassifications, net	530		(1)		7		536
Amounts reclassified, pre-tax	1		44		4		49
Tax expense	(13)		(10)		(3)		(26)
ASU 2018-02 adoption impact	(8)		(737)		—		(745)
Balance at March 31, 2019	$	(2,932)	$	(6,422)	$	(165)	$	(9,519)