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Valuation and Qualifying Accounts | 12 Months Ended
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Sep. 30, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
VALUATION AND QUALIFYING ACCOUNTS | JOHNSON CONTROLS INTERNATIONAL PLC AND SUBSIDIARIES SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (In millions)
Year Ended September 30, | 2021 |  | 2020 |  | 2019
Accounts Receivable - Allowance for Expected Credit Losses (1) |  |  |  |  |
Balance at beginning of period | $ | 173 |  |  | $ | 173 |  |  | $ | 169 |
Provision (income) charged to costs and expenses | (3) |  |  | 20 |  |  | 37 |
Accounts charged off, net of recoveries | (65) |  |  | (21) |  |  | (21) |
Divestiture of businesses | — |  |  | — |  |  | (10) |
Currency translation | 1 |  |  | 1 |  |  | (2) |
Other (including impact of adoption of ASU 2016-13) | 4 |  |  | — |  |  | — |
Balance at end of period | $ | 110 |  |  | $ | 173 |  |  | $ | 173 |
Deferred Tax Assets - Valuation Allowance |  |  |  |  |
Balance at beginning of period | $ | 5,518 |  |  | $ | 5,068 |  |  | $ | 5,088 |
Allowance provision for new operating and other loss carryforwards | 505 |  |  | 624 |  |  | 195 |
Allowance provision (benefits) | (170) |  |  | (174) |  |  | (215) |
Balance at end of period | $ | 5,853 |  |  | $ | 5,518 |  |  | $ | 5,068 |
(1) Allowance for doubtful accounts as of September 30, 2020 and 2019, prior to the adoption of ASU 2016-13.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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