Acquisitions (Details) - USD ($) $ in Millions					3 Months Ended		6 Months Ended
	Aug. 03, 2015	Apr. 03, 2015	May. 07, 2014	May. 07, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill					$ 5,930		$ 5,930		$ 5,898
Accrued Contingent Consideration					241		241		$ 274
Business Combination, Liabilities Arising from Contingencies, Amount Recognized							31	$ 3
Adjustments to accrued contingent consideration							0
Maximum future contingent consideration for acquisitions					1,868		1,868
Payments to Acquire Businesses, Net of Cash Acquired							63	72
Payment of contingent consideration					(11)	$ (3)	(87)	(15)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability					19	(96)	46	(118)
Contingent payment related to business combination							110
Total payout [Member]
Business Acquisition [Line Items]
Payment of contingent consideration							(110)
R&D- and commercialization-based milestones [Member]
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Liability					$ (14)		$ (14)
contingent consideration liability, projected year of payment							2015
R&D- and commercialization-based milestones [Member] | Minimum [Member]
Business Acquisition [Line Items]
contingent consideration liability, probability of payment					95.00%		95.00%
Risk-adjusted discount rate for contingent consideration					0.90%		0.90%
R&D- and commercialization-based milestones [Member] | Maximum [Member]
Business Acquisition [Line Items]
contingent consideration liability, probability of payment					100.00%		100.00%
Risk-adjusted discount rate for contingent consideration					1.20%		1.20%
revenue-based payments [Member] | Discounted cash flow [Member]
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Liability					$ (70)		$ (70)
revenue-based payments [Member] | Discounted cash flow [Member] | Minimum [Member]
Business Acquisition [Line Items]
contingent consideration liability, projected year of payment							2015
Risk-adjusted discount rate for contingent consideration					11.50%		11.50%
revenue-based payments [Member] | Discounted cash flow [Member] | Maximum [Member]
Business Acquisition [Line Items]
contingent consideration liability, projected year of payment							2018
Risk-adjusted discount rate for contingent consideration					15.00%		15.00%
revenue-based payments [Member] | Monte Carlo [Member]
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Liability					$ (157)		$ (157)
revenue-based payments [Member] | Monte Carlo [Member] | Minimum [Member]
Business Acquisition [Line Items]
Revenue Volatility - Contingent Consideration							11.00%
contingent consideration liability, projected year of payment							2015
revenue-based payments [Member] | Monte Carlo [Member] | Maximum [Member]
Business Acquisition [Line Items]
Revenue Volatility - Contingent Consideration							20.00%
contingent consideration liability, projected year of payment							2018
Xlumena [Member]
Business Acquisition [Line Items]
Goodwill					30		$ 30
Business Combination, Liabilities Arising from Contingencies, Amount Recognized							31
Payments to Acquire Businesses, Net of Cash Acquired		$ 63					63
Potential payments based on acheiving certain milestones		$ 13
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination							94
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles					68		68
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets					3		3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets, Current					$ (7)		$ (7)
IoGyn [Member]
Business Acquisition [Line Items]
Minority interest owned of IoGyn			28.00%	28.00%
Business Combination, Consideration Transferred, Liabilities Incurred			$ 8	$ 96
Goodwill						39		39
Payments to Acquire Businesses, Net of Cash Acquired			$ 65
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination						96
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						72		72
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets, Current						$ (14)		$ (14)
Remaining equity of IoGyn purchased						72.00%		72.00%
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value						$ 31
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other						(1)		$ (1)
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain						$ 19
2015 Acquisitions [Member] | AMS urology portfolio [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 1,600
Potential payments based on acheiving certain milestones	$ 50
Technology-Based Intangible Assets [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life						14 years
Range of Risk Adjusted Discount Rates used in Purchase Price Allocation					15.00%	14.00%	15.00%	14.00%
Technology-Based Intangible Assets [Member] | IoGyn [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired						$ 71
Customer Relationships [Member] | Xlumena [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired							$ 68
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life							11 years
Other Intangible Assets [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life						2 years
Range of Risk Adjusted Discount Rates used in Purchase Price Allocation						14.00%		14.00%
Other Intangible Assets [Member] | IoGyn [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired						$ 1