Acquisitions - Additional Information (Detail) - CareFusion [Member] - USD ($)		3 Months Ended	9 Months Ended
	Mar. 17, 2015	Jun. 30, 2015	Jun. 30, 2015
Business Acquisition [Line Items]
Percentage of equity interest acquired	100.00%
Cash value of stock received under the agreement	$ 49.00
Conversion factor	0.0777
Acquisition agreement date			Oct. 05, 2014
Total consideration transferred	$ 12,538,000,000
Liability for product recalls		$ 36,000,000	$ 36,000,000
Portion of goodwill from acquisition expected to be deductible for tax purposes		0	0
Financing costs		5,000,000	107,000,000
Transaction costs		9,000,000	52,000,000
Integration costs		24,000,000	55,000,000
Restructuring costs		75,000,000	136,000,000
Revenues		1,000,000,000	1,000,000,000
Operating loss		261,000,000	$ 261,000,000
Pro forma date of acquisition			Oct. 01, 2013
Customer Relationships [Member]
Business Acquisition [Line Items]
Risk-adjusted discount rate			11.00%
Weighted average amortization period, expected useful life			15 years
Developed Technology [Member]
Business Acquisition [Line Items]
Risk-adjusted discount rate			11.00%
Weighted average amortization period, expected useful life			12 years
In-Process Research and Development [Member]
Business Acquisition [Line Items]
Risk-adjusted discount rate			12.00%
Acquired in-process research and development assets		$ 110,000,000	$ 110,000,000
In-Process Research and Development [Member] | Minimum [Member]
Business Acquisition [Line Items]
Technological and commercial risk			80.00%
Expected fiscal year of project launch			2016
In-Process Research and Development [Member] | Maximum [Member]
Business Acquisition [Line Items]
Technological and commercial risk			85.00%
Expected fiscal year of project launch			2022
Trademarks [Member]
Business Acquisition [Line Items]
Risk-adjusted discount rate			11.00%
Weighted average amortization period, expected useful life			22 years