Accumulated Other Comprehensive Income (Loss) (AOCI) Reclassifications (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of products	$ 547	$ 524	$ 1,554	$ 1,577
Cost of services	696	569	1,969	1,666
Selling, general and administrative expenses	232	217	724	678
Research and development expenses	59	53	186	163
Interest expense	46	23	135	70
Income from continuing operations	0	(100)	(145)	(251)
Total reclassifications, net of tax	(19)	19	14	44
Net income	(15)	(98)	(158)	(245)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of products		(2)		(3)
Cost of services	(2)	(1)	(7)	(10)
Selling, general and administrative expenses	(1)	0	(5)	(6)
Research and development expenses	(1)	0	(2)	(3)
Interest expense	1	2	4	5
Income from continuing operations	(3)	(1)	(10)	(17)
Total reclassifications, net of tax	1	1	4	7
Net income	(2)	0	(6)	(10)
Reclassification out of Accumulated Other Comprehensive Income | Actuarial losses recognized
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of products		0		0
Cost of services	0	0	1	3
Selling, general and administrative expenses	0	2	0	2
Research and development expenses	0	1	0	1
Interest expense	0	0	0	0
Income from continuing operations	0	3	1	6
Reclassification out of Accumulated Other Comprehensive Income | Amortization of prior service benefit
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of products		(1)		(2)
Cost of services	(2)	(1)	(8)	(13)
Selling, general and administrative expenses	(1)	(2)	(5)	(8)
Research and development expenses	(1)	(1)	(2)	(4)
Interest expense	0	0	0	0
Income from continuing operations	(4)	(5)	(15)	(27)
Reclassification out of Accumulated Other Comprehensive Income | Cash Flow Hedging [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of products		(1)		(1)
Cost of services	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Research and development expenses	0	0	0	0
Interest expense	1	2	4	5
Income from continuing operations	$ 1	$ 1	$ 4	$ 4