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Valuation and Qualifying Accounts | 12 Months Ended
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Sep. 30, 2018
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, | 2018 |  | 2017 |  | 2016
Accounts Receivable - Allowance for Doubtful Accounts |  |  |  |  |
Balance at beginning of period | $ | 182 |  |  | $ | 173 |  |  | $ | 70 |
Provision charged to costs and expenses | 40 |  |  | 39 |  |  | 45 |
Reserve adjustments | (24 | ) |  | (9 | ) |  | (8 | )
Accounts charged off | (21 | ) |  | (41 | ) |  | (25 | )
Acquisition of businesses | — |  |  | 18 |  |  | 91 |
Currency translation | — |  |  | 2 |  |  | — |
Balance at end of period | $ | 177 |  |  | $ | 182 |  |  | $ | 173 |
Deferred Tax Assets - Valuation Allowance |  |  |  |  |
Balance at beginning of period | $ | 3,838 |  |  | $ | 3,400 |  |  | $ | 1,151 |
Allowance provision for new operating and other loss carryforwards | 1,665 |  |  | 542 |  |  | 121 |
Allowance provision benefits | (308 | ) |  | (157 | ) |  | (331 | )
Acquisition of businesses | — |  |  | 53 |  |  | 2,459 |
Balance at end of period | $ | 5,195 |  |  | $ | 3,838 |  |  | $ | 3,400 |

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -URI http://asc.fasb.org/topic&trid=2122369 + Details
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- References No definition available. + Details
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