Acquisitions and Strategic Investments (Details) - USD ($) $ in Millions					3 Months Ended		9 Months Ended		12 Months Ended
	Aug. 03, 2015	Apr. 03, 2015	Sep. 02, 2014	May. 07, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Business Acquisition [Line Items]
Business Acquisition, Goodwill, Expected Tax Deductible Amount					$ 500		$ 500		$ 150
Goodwill					6,468		6,468		5,898
Accrued Contingent Consideration					266		266		274
Business Combination, Liabilities Arising from Contingencies, Amount Recognized							31	$ 0
Adjustments to accrued contingent consideration							0
Maximum future contingent consideration for acquisitions					1,893		1,893
Payments to Acquire Businesses, Net of Cash Acquired							1,642	487
Payment of contingent consideration					(15)		(102)	(15)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability					40	$ (4)	86	(122)
Contingent payment related to business combination							125
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value								31
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain						19
Total payout [Member]
Business Acquisition [Line Items]
Payment of contingent consideration							(125)
revenue-based payments [Member] | Discounted cash flow [Member]
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Liability					(84)		$ (84)
revenue-based payments [Member] | Discounted cash flow [Member] | Minimum [Member]
Business Acquisition [Line Items]
Fair Value Inputs, Discount Rate							11.50%
contingent consideration liability, projected year of payment							2015
revenue-based payments [Member] | Discounted cash flow [Member] | Maximum [Member]
Business Acquisition [Line Items]
Fair Value Inputs, Discount Rate							15.00%
contingent consideration liability, projected year of payment							2019
revenue-based payments [Member] | Monte Carlo [Member]
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Liability					(182)		$ (182)
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
Bayer and IoGyn [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred, Liabilities Incurred						510
Goodwill						210		210
Payments to Acquire Businesses, Net of Cash Acquired						479
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination						510
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						263		263	263
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory									23
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment									17
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets									$ 5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets, Current						(7)		(7)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other						(1)		$ (1)
Bayer [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired			$ 414
IoGyn [Member]
Business Acquisition [Line Items]
Minority interest owned of IoGyn				28.00%
Business Combination, Consideration Transferred, Liabilities Incurred				$ 8
Payments to Acquire Businesses, Net of Cash Acquired						$ 65
Remaining equity of IoGyn purchased						72.00%		72.00%
2015 Acquisitions [Member]
Business Acquisition [Line Items]
Goodwill					568		$ 568
Business Combination, Liabilities Arising from Contingencies, Amount Recognized							31
Payments to Acquire Businesses, Net of Cash Acquired							1,659
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination							1,690
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles					992		992
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory					102		102
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment					42		42
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets					39		39
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets, Current					$ (53)		$ (53)
AMS urology portfolio [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 1,616
Potential payments based on acheiving certain milestones	50
Non-voting Preferred Stock Investment Amount	$ 60
Xlumena [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired		$ 63
Potential payments based on acheiving certain milestones		$ 13
Technology-Based Intangible Assets [Member] | Minimum [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life							11 years		10 years
Range of Risk Adjusted Discount Rates used in Purchase Price Allocation					13.50%		13.50%		14.00%
Technology-Based Intangible Assets [Member] | Maximum [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life							12 years		14 years
Range of Risk Adjusted Discount Rates used in Purchase Price Allocation					15.00%		15.00%		18.00%
Technology-Based Intangible Assets [Member] | Bayer and IoGyn [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired						$ 233
Technology-Based Intangible Assets [Member] | 2015 Acquisitions [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired							$ 358
Customer Relationships [Member] | Bayer and IoGyn [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired									$ 29
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									10 years
Range of Risk Adjusted Discount Rates used in Purchase Price Allocation									18.00%
Customer Relationships [Member] | 2015 Acquisitions [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired							$ 616
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life							12 years
Range of Risk Adjusted Discount Rates used in Purchase Price Allocation					13.50%		13.50%
Other Intangible Assets [Member] | Bayer and IoGyn [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired									$ 1
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									2 years
Range of Risk Adjusted Discount Rates used in Purchase Price Allocation									14.00%
Other Intangible Assets [Member] | 2015 Acquisitions [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired							$ 18
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life							13 years
Range of Risk Adjusted Discount Rates used in Purchase Price Allocation					13.50%		13.50%