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Acquisitions and Divestitures - Additional Information (Detail) $ in Millions | 3 Months Ended |
--- | --- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($)
Acquisitions And Discontinued Operations [Line Items] |  |  |
Cash paid for business acquisition | $ 0 | $ 3 |
Goodwill, Acquired During Period | 0 |  |
Reduction in goodwill related to business divestitures | 18 |  |
Proceeds from business divestitures, net of cash divested | 2,011 | 47 |
Adjustment to purchase price of previous acquisition | 0 | $ 45 |
Scott Safety business [Member] |  |  |
Acquisitions And Discontinued Operations [Line Items] |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal | 114 |  |
Reduction in goodwill related to business divestitures | 1,200 |  |
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax | 84 |  |
Proceeds from business divestitures, net of cash divested | 2,000 |  |
Business Divestitures, Not Specific [Member] |  |  |
Acquisitions And Discontinued Operations [Line Items] |  |  |
Number Of Businesses Divested |  | 1 |
Proceeds from Divestiture of Businesses |  | $ 4 |
Cash Divested from Deconsolidation |  | 5 |
Proceeds from business divestitures, net of cash divested |  | $ 52 |
Individually Immaterial Acquisitions |  |  |
Acquisitions And Discontinued Operations [Line Items] |  |  |
Number of acquisitions |  | 2 |
Purchase price, net of cash acquired |  | $ 6 |
Cash paid for business acquisition |  | 3 |
Goodwill, Acquired During Period |  | $ 1 |
Power Solutions |  |  |
Acquisitions And Discontinued Operations [Line Items] |  |  |
Goodwill, Acquired During Period | 0 |  |
Reduction in goodwill related to business divestitures | 0 |  |
Tyco International Holding S.a.r.L. (TSarL) [Member] |  |  |
Acquisitions And Discontinued Operations [Line Items] |  |  |
Repayments of Debt | 1,900 |  |
Long-term Debt | $ 1,800 |  | $ 4,000

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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- Definition The net cash inflow or outflow associated with the aggregate amount of adjustment to the purchase price of a previous acquisition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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