Accumulated Other Comprehensive Income (Loss) (AOCI) Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of products	$ 544	$ 531	$ 1,027	$ 1,007
Cost of services	914	647	1,517	1,273
Selling, general and administrative expenses	339	247	564	492
Research and development expenses	67	64	122	127
Interest expense	45	46	89	89
Income from continuing operations	343	(91)	301	(145)
Total reclassifications, net of tax	32	29	34	33
Net income	344	(90)	304	(143)
Other Nonoperating Income (Expense)	0	3	7	10
Reclassification out of Accumulated Other Comprehensive Income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of products	(2)		(4)
Cost of services	(2)	(3)	(4)	(5)
Selling, general and administrative expenses	(3)	(2)	(5)	(4)
Research and development expenses			(1)	(1)
Interest expense	1	2	2	3
Income from continuing operations	(6)	(3)	(12)	(7)
Total reclassifications, net of tax	2	1	4	3
Net income	(4)	(2)	(8)	(4)
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	1
Selling, general and administrative expenses	0	0	0	0
Research and development expenses			0	0
Interest expense	0	0	0	0
Income from continuing operations	0	0	1	1
Reclassification out of Accumulated Other Comprehensive Income | Amortization of prior service benefit
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of products	0		0
Cost of services	(2)	(3)	(5)	(6)
Selling, general and administrative expenses	(3)	(2)	(5)	(4)
Research and development expenses			(1)	(1)
Interest expense	0	0	0	0
Income from continuing operations	(5)	(5)	(11)	(11)
Reclassification out of Accumulated Other Comprehensive Income | Cash Flow Hedging [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of products	(2)		(4)
Cost of services	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Research and development expenses			0	0
Interest expense	1	2	2	3
Income from continuing operations	$ (1)	$ 2	$ (2)	$ 3