Acquisitions (Details) $ in Millions	1 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Jan. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) business	Sep. 30, 2014 USD ($)
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired			$ 153	$ 25	$ 201	$ 306
RSA Medical LLC [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 141
Intellinex LLC [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition		Jan. 31, 2015
Payments to Acquire Businesses, Net of Cash Acquired		$ 28
Services
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired					$ 26
Number of Businesses Acquired | business					2
Technology Segment [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired					$ 6
Number of Businesses Acquired | business					1