Discontinued Operations Disposal Group - Assets Held For Sale (Details) - USD ($) $ in Millions	Jun. 30, 2018	Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale	$ 12	$ 189
Noncurrent assets held for sale	0	1,920
Liabilities held for sale	0	72
Noncurrent liabilities held for sale	0	173
Global Products | Scott Safety business [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash		9
Accounts receivable - net		100
Inventories		75
Other current assets		5
Assets held for sale		189
Property, plant and equipment - net		79
Goodwill		1,248
Other intangible assets - net		592
Other noncurrent assets		1
Noncurrent assets held for sale		1,920
Accounts payable		37
Accrued compensation and benefits		10
Other current liabilities		25
Liabilities held for sale		72
Other noncurrent liabilities		173
Noncurrent liabilities held for sale		$ 173
Corporate Segment | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale	$ 12