Guarantees (Tables)

6 Months Ended

Jun. 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 six months ended June 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	154			133
Settlements made	(131		)	(136		)
Other	6			(19		)
Balance as of June 30	$	1,241		$	1,242