Acquisitions Definitive Agreement to Acquire CareFusion Corporation - Additional Information (Detail) (USD $)	3 Months Ended	0 Months Ended
	Dec. 31, 2014	Oct. 05, 2014	Oct. 03, 2014
Business Acquisition [Line Items]
Share closing price			$ 115.84
Acquisition-related costs	$ 23,000,000
CareFusion [Member]
Business Acquisition [Line Items]
Total consideration transferred per share of acquiree		$ 58
Total consideration transferred		12,200,000,000
Acquisition agreement date	Oct. 05, 2014
Percentage of equity interest acquired		100.00%
Total cash consideration		10,100,000,000
Issued unsecured senior notes		6,200,000,000
Shares issuable to stockholders		2,100,000,000
Cash value of stock receivable under the agreement without interest		$ 49.00
Number of shares issued for each share of acquiree		0.0777
Description of Shares issuable to stockholders	Under the terms of the transaction, CareFusion stockholders will receive $49.00 in cash, without interest, and 0.0777 of a share of BD for each share of CareFusion. Using the Company’s closing price as of October 3, 2014 of $115.84 would result in a total cost of $58.00 per CareFusion share. The value of the consideration transferred for accounting purposes will ultimately be based on the closing share price of the Company’s stock on the last trading day prior to the closing date of the transaction, and could materially change.
Financing costs	44,000,000
Acquisition-related costs	$ 23,000,000