Divestiture - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Oct. 03, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale		$ 0	$ 137
Gain (Loss) on Disposition of Business		336	0	$ 0
Proceeds from divestitures, net		477	534	165
Gain on Sale of Investments		0	303	$ 0
Advanced Bioprocessing
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Business		$ 336
Vyaire Medical
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestitures, net	$ 435
Gain on Sale of Investments	$ 303
Disposal Group, Held-for-sale, Not Discontinued Operations | Advanced Bioprocessing
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale			$ 137
Disposal Group, Held-for-sale, Not Discontinued Operations | Respiratory Solutions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Percent Of Business Sold					50.10%
Disposal Group, Including Discontinued Operation, Percent Of Business Retained					49.90%