Business Acquisitions (Details) - USD ($) $ in Millions			1 Months Ended	6 Months Ended	12 Months Ended
	Sep. 26, 2014	Sep. 26, 2014	Dec. 31, 2014	Jun. 30, 2015	Dec. 31, 2014
Business acquisitions
Subsequent payment related to working capital adjustment			$ 5
Net cash paid, net of cash on hand of acquired company				$ 4
Minimum
Allocation of the fair value
Amortization period of acquired intangible assets				2 years
Maximum
Allocation of the fair value
Amortization period of acquired intangible assets				20 years
Average
Allocation of the fair value
Amortization period of acquired intangible assets				12 years
CFR Pharmaceuticals SA
Business acquisitions
Cash paid for business acquisition	$ 2,900
Net cash paid, net of cash on hand of acquired company	2,800
Assumed debt	570	$ 570
Acquisition cost	$ 3,400
Percentage of voting interest acquired	99.90%	99.90%
Fair value of the non-controlling interest at the acquisition date	$ 3	$ 3
Allocation of the fair value
Acquired intangible assets, non-deductible	1,800	1,800
Goodwill, non-deductible		1,600
Acquired net tangible assets	60	60
Deferred income taxes recorded at acquisition	(540)	(540)
Total preliminary allocation of fair value	2,920	2,920
Cash and cash equivalents	94	94
Trade accounts receivable	179	179
Inventory	169	169
Other current assets	51	51
Property and equipment	209	209
Other long-term assets	138	138
Borrowings	570	570
Trade accounts payable and other current liabilities	200	200
Other noncurrent liabilities	15	$ 15
Pro forma financial information
Annualized net sales expected	$ 750
CFR Pharmaceuticals SA | Minimum
Allocation of the fair value
Amortization period of acquired intangible assets	12 years
CFR Pharmaceuticals SA | Maximum
Allocation of the fair value
Amortization period of acquired intangible assets	16 years
CFR Pharmaceuticals SA | Average
Allocation of the fair value
Amortization period of acquired intangible assets	15 years
Veropharm
Business acquisitions
Cash paid for business acquisition			$ 315
Acquisition cost					$ 415
Percentage of voting interest acquired			98.00%	100.00%	98.00%
Fair value of the non-controlling interest at the acquisition date			$ 5		$ 5
Assumed debt			90		90
Allocation of the fair value
Goodwill, non-deductible			115
Deferred income taxes recorded at acquisition			$ (25)		(25)
Amortization period of acquired intangible assets			16 years
Trade accounts receivable			$ 45		45
Inventory			25		25
Property and equipment			165		165
Other current liabilities			10		10
Pro forma financial information
Non-deductible definite-lived intangible assets			100		100
Topera
Business acquisitions
Cash paid for business acquisition			250
Allocation of the fair value
Goodwill, non-deductible			175
Deferred income taxes recorded at acquisition			$ (105)		(105)
Amortization period of acquired intangible assets			16 years
Pro forma financial information
Additional payments upon completion of certain development, regulatory and sales milestones			$ 300		300
Non-deductible acquired in-process research and development			20		20
Non-deductible definite-lived intangible assets			325		325
Contingent consideration			$ 165		$ 165