Guarantees (Tables)

9 Months Ended

Sep. 30, 2016

Service and Product Warranties and Product Performance Guarantees [Abstract]

Product Warranty Disclosure [Table Text Block]

The changes in the carrying amount of service and product warranties and product performance guarantees for the nine months ended September 30, 2016 and 2015 are as follows:

(Dollars in millions)	2016			2015
Balance as of January 1	$	1,212		$	1,264
Warranties and performance guarantees issued	218			208
Settlements made	(192		)	(217		)
Other	—			(56		)
Balance as of September 30	$	1,238		$	1,199