Guarantees (Tables)

3 Months Ended

Mar. 31, 2015

Service and Product Warranties and Product Performance Guarantees [Abstract]

Product Warranty Disclosure [Table Text Block]

(Dollars in millions)	2015			2014
Balance as of January 1	$	1,313		$	1,360
Warranties and performance guarantees issued	76			79
Settlements made	(71		)	(71		)
Other	(4		)	(39		)
Balance as of March 31	$	1,314		$	1,329