Guarantees (Tables)

3 Months Ended

Mar. 31, 2021

Service and Product Warranties and Product Performance Guarantees [Abstract]

Schedule of guarantees

As of March 31, 2021 and December 31, 2020, the following guarantees were outstanding:

	March 31, 2021				December 31, 2020
(dollars in millions)	Maximum Potential Payment		Carrying Amount of Liability		Maximum Potential Payment		Carrying Amount of Liability
Commercial aerospace financing arrangements	$	314	$	6	$	322	$	6
Third party guarantees	379		2		386		3

Product Warranty Disclosure [Table Text Block]

The changes in the carrying amount of service and product warranties and product performance guarantees for the quarters ended March 31, 2021 and 2020 are as follows:

(dollars in millions)	2021		2020
Balance as of January 1	$	1,057	$	1,033
Warranties and performance guarantees issued	113		90
Settlements	(69)		(87)
Other	(1)		(11)
Balance as of March 31	$	1,100	$	1,025