Business Acquisitions (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended		6 Months Ended
	Jan. 30, 2016	Feb. 29, 2016	Aug. 31, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Business acquisitions
Net cash paid, net of cash on hand of acquired company				$ 7	$ 4
Allocation of the fair value
Goodwill, non-deductible				$ 9,752		$ 9,638
Maximum
Business acquisitions
Senior unsecured bridge term loan		$ 9,000
Bridge loan
Business acquisitions
Maturity period		364 days
Tendyne Holdings, Inc.
Business acquisitions
Cash paid for business acquisition			$ 225
Additional payments upon completion of certain regulatory milestones			150
Allocation of the fair value
Acquired intangible assets, non-deductible			220
Goodwill, non-deductible			142
Other long-term assets			13
Deferred income taxes recorded at acquisition			(80)
Contingent consideration			$ 70
Alere Inc
Business acquisitions
Annual sales	$ 2,500
Share price (in dollars per share)	$ 56
Expected equity value	$ 5,800
Liabilities assumed	$ 2,600