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Equity and Noncontrolling Interests (Tables) | 12 Months Ended
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Sep. 30, 2021
Stockholders' Equity Note [Abstract] |
Equity Attributable to Johnson Controls plc and Noncontrolling Interests | The following schedules present changes in consolidated equity attributable to Johnson Controls and noncontrolling interests (in millions, net of tax):
| Equity Attributable to Johnson Controls International plc |  | Equity Attributable to Noncontrolling Interests |  | Total Equity
At September 30, 2018 | $ | 21,164 |  |  | $ | 1,294 |  |  | 22,458 |
Total comprehensive income (loss): |  |  |  |  |
Net income | 5,674 |  |  | 213 |  |  | 5,887 |
Foreign currency translation adjustments | (325) |  |  | (17) |  |  | (342) |
Realized and unrealized gains (losses) on derivatives | 7 |  |  | (1) |  |  | 6 |
Pension and postretirement plans | (6) |  |  | — |  |  | (6) |
Other comprehensive loss | (324) |  |  | (18) |  |  | (342) |
Comprehensive income | 5,350 |  |  | 195 |  |  | 5,545 |
Other changes in equity: |  |  |  |  |
Cash dividends - ordinary shares ($1.04 per share) | (887) |  |  | — |  |  | (887) |
Dividends attributable to noncontrolling interests | — |  |  | (132) |  |  | (132) |
Repurchases and retirements of ordinary shares | (5,983) |  |  | — |  |  | (5,983) |
Divestiture of Power Solutions | 483 |  |  | (295) |  |  | 188 |
Adoption of ASC 606 | (45) |  |  | — |  |  | (45) |
Adoption of ASU 2016-16 | (546) |  |  | — |  |  | (546) |
Other, including options exercised | 230 |  |  | 1 |  |  | 231 |
At September 30, 2019 | 19,766 |  |  | 1,063 |  |  | 20,829 |
Total comprehensive income: |  |  |  |  |
Net income | 631 |  |  | 164 |  |  | 795 |
Foreign currency translation adjustments | 7 |  |  | 18 |  |  | 25 |
Realized and unrealized gains on derivatives | 4 |  |  | 4 |  |  | 8 |
Pension and postretirement plans | 8 |  |  | — |  |  | 8 |
Other comprehensive income | 19 |  |  | 22 |  |  | 41 |
Comprehensive income | 650 |  |  | 186 |  |  | 836 |
Other changes in equity: |  |  |  |  |
Cash dividends - ordinary shares ($1.04 per share) | (780) |  |  | — |  |  | (780) |
Dividends attributable to noncontrolling interests | — |  |  | (114) |  |  | (114) |
Repurchases and retirements of ordinary shares | (2,204) |  |  | — |  |  | (2,204) |
Change in noncontrolling interest share | (83) |  |  | (49) |  |  | (132) |
Adoption of ASC 842 | (5) |  |  | — |  |  | (5) |
Other, including options exercised | 103 |  |  | — |  |  | 103 |
At September 30, 2020 | 17,447 |  |  | 1,086 |  |  | 18,533 |
Total comprehensive income (loss): |  |  |  |  |
Net income | 1,637 |  |  | 233 |  |  | 1,870 |
Foreign currency translation adjustments | 357 |  |  | 19 |  |  | 376 |
Realized and unrealized gains (losses) on derivatives | (19) |  |  | 1 |  |  | (18) |
Pension and postretirement plans | 4 |  |  | — |  |  | 4 |
Other comprehensive income | 342 |  |  | 20 |  |  | 362 |
Comprehensive income | 1,979 |  |  | 253 |  |  | 2,232 |
Other changes in equity: |  |  |  |  |
Cash dividends - ordinary shares ($1.07 per share) | (771) |  |  | — |  |  | (771) |
Dividends attributable to noncontrolling interests | — |  |  | (142) |  |  | (142) |
Repurchases and retirements of ordinary shares | (1,307) |  |  | — |  |  | (1,307) |
Change in noncontrolling interest share | (8) |  |  | (6) |  |  | (14) |
Adoption of ASU 2016-13 | (4) |  |  | — |  |  | (4) |
Other, including options exercised | 226 |  |  | — |  |  | 226 |
At September 30, 2021 | $ | 17,562 |  |  | $ | 1,191 |  |  | $ | 18,753 |
Changes in Redeemable Noncontrolling Interests |
Changes in Accumulated Other Comprehensive Income, net of tax | The following schedules present changes in AOCI attributable to Johnson Controls (in millions, net of tax):
| Year Ended September 30,
| 2021 |  | 2020 |  | 2019
Foreign currency translation adjustments |  |  |  |  |
Balance at beginning of period | $ | (778) |  |  | $ | (785) |  |  | $ | (939) |
Divestiture of Power Solutions | — |  |  | — |  |  | 479 |
Aggregate adjustment for the period (net of tax effect of $0, $1 and $0) | 357 |  |  | 7 |  |  | (325) |
Balance at end of period | (421) |  |  | (778) |  |  | (785) |
Realized and unrealized gains (losses) on derivatives |  |  |  |  |
Balance at beginning of period | 2 |  |  | (2) |  |  | (13) |
Divestiture of Power Solutions (net of tax effect of $0, $0 and $1) | — |  |  | — |  |  | 4 |
Current period changes in fair value (net of tax effect of $5, $1 and $(1)) | (8) |  |  | 3 |  |  | (1) |
Reclassification to income (net of tax effect of $(3), $0 and $2) (1) | (11) |  |  | 1 |  |  | 8 |
Balance at end of period | (17) |  |  | 2 |  |  | (2) |
Realized and unrealized gains (losses) on marketable securities |  |  |  |  |
Balance at beginning of period | — |  |  | — |  |  | 8 |
Adoption of ASU 2016-01 (2) | — |  |  | — |  |  | (8) |
Balance at end of period | — |  |  | — |  |  | — |
Pension and postretirement plans |  |  |  |  |
Balance at beginning of period | — |  |  | (8) |  |  | (2) |
Reclassification to income (net of tax effect of $0, $(1) and $0) | (3) |  |  | (1) |  |  | — |
Other changes (net of tax effect of $(1), $4 and $0) | 7 |  |  | 9 |  |  | (6) |
Balance at end of period | 4 |  |  | — |  |  | (8) |
Accumulated other comprehensive loss, end of period | $ | (434) |  |  | $ | (776) |  |  | $ | (795) |
(1) Refer to Note 11, "Derivative Instruments and Hedging Activities," of the notes to consolidated financial statements for disclosure of the line items in the consolidated statements of income affected by reclassifications from AOCI into income related to derivatives. (2) The Company adopted ASU 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities" effective October 1, 2018 and, as a result, reclassified $8 million of unrealized gains on marketable securities to retained earnings.

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- Definition Tabular disclosure of temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (27) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=122040564&loc=d3e177068-122764 + Details
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