Guarantees (Tables)

3 Months Ended

Mar. 31, 2016

Service and Product Warranties and Product Performance Guarantees [Abstract]

Product Warranty Disclosure [Table Text Block]

(Dollars in millions)	2016			2015
Balance as of January 1	$	1,212		$	1,264
Warranties and performance guarantees issued	76			72
Settlements made	(62		)	(68		)
Other	10			(4		)
Balance as of March 31	$	1,236		$	1,264