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Segment Information - Financial Information Related to Company's Reportable Segments (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |
Net sales | $ 5,576 | $ 5,464
Segment EBITA | 623 | 583
Corporate expenses | (118) | (136)
Amortization of intangible assets | (96) | (97)
Restructuring and impairment costs | (111) | 0
Equity Securities, FV-NI, Unrealized Gain (Loss) Restricted | 10 | (21)
Net financing charges | (52) | (85)
Income from continuing operations before income taxes | 256 | 244
Building Solutions North America |  |
Segment Reporting Information [Line Items] |  |
Net sales | 2,167 | 2,116
Building Solutions EMEA/LA |  |
Segment Reporting Information [Line Items] |  |
Net sales | 928 | 907
Building Solutions Asia Pacific |  |
Segment Reporting Information [Line Items] |  |
Net sales | 629 | 613
Global Products |  |
Segment Reporting Information [Line Items] |  |
Net sales | 1,852 | 1,828
Building Technologies & Solutions | Building Solutions North America |  |
Segment Reporting Information [Line Items] |  |
Net sales | 2,167 | 2,116
Segment EBITA | 258 | 250
Building Technologies & Solutions | Building Solutions EMEA/LA |  |
Segment Reporting Information [Line Items] |  |
Net sales | 928 | 907
Segment EBITA | 90 | 77
Building Technologies & Solutions | Building Solutions Asia Pacific |  |
Segment Reporting Information [Line Items] |  |
Net sales | 629 | 613
Segment EBITA | 72 | 66
Building Technologies & Solutions | Global Products |  |
Segment Reporting Information [Line Items] |  |
Net sales | 1,852 | 1,828
Segment EBITA | $ 203 | $ 190

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