Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2013

Notes to Consolidated Financial Statements [Abstract]

Fair Value, by Balance Sheet Grouping [Text Block]

2013 (dollars in millions)	Total			Level 1		Level 2			Level 3
Recurring fair value measurements:
Available-for-sale securities	$	988		$	988	$	—		$	—
Derivative assets	90			—		90			—
Derivative liabilities	(157		)	—		(157		)	—
Nonrecurring fair value measurements:
Business dispositions	66			—		66			—

2012(dollars in millions)	Total			Level 1		Level 2			Level 3
Recurring fair value measurements:
Available-for-sale securities	$	781		$	781	$	—		$	—
Derivative assets	128			—		128			—
Derivative liabilities	(149		)	—		(149		)	—
Nonrecurring fair value measurements:
Equity method investments	432			—		432			—
Business dispositions	84			—		84			—

Fair Value, Measurement Inputs, Disclosure [Text Block]

	December 31, 2013						December 31, 2012
(dollars in millions)	Carrying Amount			Fair Value			Carrying Amount			Fair Value
Long-term receivables	$	655		$	586		$	499		$	464
Customer financing notes receivable	394			366			375			371
Short-term borrowings	(388		)	(388		)	(503		)	(503		)
Long-term debt (excluding capitalized leases)	(19,807		)	(21,525		)	(22,665		)	(25,606		)
Long-term liabilities	(283		)	(253		)	(182		)	(167		)

(dollars in millions)	Total			Level 1		Level 2			Level 3
Long-term receivables	$	586		$	—	$	586		$	—
Customer financing notes receivable	366			—		366			—
Short-term borrowings	(388		)	—		(200		)	(188		)
Long-term debt (excluding capitalized leases)	(21,525		)	—		(21,211		)	(314		)
Long-term liabilities	(253		)	—		(253		)	—