Guarantees (Tables)

12 Months Ended

Dec. 31, 2013

Notes to Consolidated Financial Statements [Abstract]

Schedule of Guarantor Obligations [Text Block]

	December 31, 2013				December 31, 2012
(dollars in millions)	Maximum Potential Payment		Carrying Amount of Liability		Maximum Potential Payment		Carrying Amount of Liability
Commercial aerospace financing arrangements (see Note 5)	$	615	$	25	$	346	$	7
Credit facilities and debt obligations—unconsolidated subsidiaries (expire 2014 to 2034)	231		6		240		2
Performance guarantees	150		—		33		—

Product Warranty Disclosure [Text Block]

	Year ended December 31,
(dollars in millions)	2013			2012
Balance as of January 1	$	1,332		$	1,468
Warranties and performance guarantees issued	313			325
Settlements made	(287		)	(277		)
Other	2			(184		)
Balance as of December 31	$	1,360		$	1,332