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Consolidated Statements of Shareholders' Equity Attributable to Johnson Controls Ordinary Shareholders Consolidated Statements of Shareholders' Equity Attributable to Johnson Controls Ordinary Shareholders - USD ($) $ in Millions | Total | Cumulative Effect, Period of Adoption, Adjustment | Ordinary Shares | Ordinary Shares Cumulative Effect, Period of Adoption, Adjustment | Capital in excess of par value | Capital in excess of par value Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings | Retained Earnings Cumulative Effect, Period of Adoption, Adjustment | Treasury Stock, at Cost | Treasury Stock, at Cost Cumulative Effect, Period of Adoption, Adjustment | Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjustment
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Adoption of ASU | $ 19,766 |  | $ 8 |  | $ 16,812 |  | $ 4,827 |  | $ (1,086) |  | $ (795) |
Adoption of ASU | Adoption of ASC 842 |  | $ (5) |  | $ 0 |  | $ 0 |  | $ (5) |  | $ 0 |  | $ 0
Beginning balance at Sep. 30, 2019 | 19,766 |  | 8 |  | 16,812 |  | 4,827 |  | (1,086) |  | (795) |
Beginning balance (Adoption of ASC 842) at Sep. 30, 2019 |  | (5) |  | 0 |  | 0 |  | (5) |  | 0 |  | 0
Comprehensive income | 414 |  | 0 |  | 0 |  | 159 |  | 0 |  | 255 |
Cash dividends - ordinary shares | (201) |  | 0 |  | 0 |  | $ (201) |  | 0 |  | 0 |
Cash dividends, Ordinary, Per share |  |  |  |  |  |  | $ 0.26 |  |  |  |  |
Repurchases and retirements of ordinary shares | (651) |  | 0 |  | 0 |  | $ (651) |  | 0 |  | 0 |
Adoption of ASU | 19,329 |  | 8 |  | 16,848 |  | 4,129 |  | (1,116) |  | (540) |
Adoption of ASU | Adoption of ASC 842 |  | (5) |  | 0 |  | 0 |  | (5) |  | 0 |  | 0
Other, including options exercised | 6 |  | 0 |  | 36 |  | 0 |  | (30) |  | 0 |
Ending balance at Dec. 31, 2019 | 19,329 |  | 8 |  | 16,848 |  | $ 4,129 |  | (1,116) |  | (540) |
Common Stock, Dividends, Per Share, Declared |  |  |  |  |  |  | $ 0.26 |  |  |  |  |
Adoption of ASU | 19,329 |  | 8 |  | 16,848 |  | $ 4,129 |  | (1,116) |  | (540) |
Adoption of ASU | 17,447 |  | 8 |  | 16,865 |  | 2,469 |  | (1,119) |  | (776) |
Adoption of ASU | Accounting Standards Update 2016-13 |  | (4) |  | 0 |  | 0 |  | (4) |  | 0 |  | 0
Beginning balance at Sep. 30, 2020 | 17,447 |  | 8 |  | 16,865 |  | 2,469 |  | (1,119) |  | (776) |
Beginning balance (Accounting Standards Update 2016-13) at Sep. 30, 2020 |  | (4) |  | 0 |  | 0 |  | (4) |  | 0 |  | 0
Comprehensive income | 723 |  | 0 |  | 0 |  | 451 |  | 0 |  | 272 |
Cash dividends - ordinary shares | (189) |  | 0 |  | 0 |  | $ (189) |  | 0 |  | 0 |
Cash dividends, Ordinary, Per share |  |  |  |  |  |  | $ 0.26 |  |  |  |  |
Repurchases and retirements of ordinary shares | (346) |  | (1) |  | 0 |  | $ (345) |  | 0 |  | 0 |
Adoption of ASU | 17,447 |  | 7 |  | 16,917 |  | 2,382 |  | (1,146) |  | (504) |
Adoption of ASU | Accounting Standards Update 2016-13 |  | $ (4) |  | $ 0 |  | $ 0 |  | $ (4) |  | $ 0 |  | $ 0
Other, including options exercised | 25 |  | 0 |  | 52 |  | 0 |  | (27) |  | 0 |
Ending balance at Dec. 31, 2020 | 17,656 |  | 7 |  | 16,917 |  | $ 2,382 |  | (1,146) |  | (504) |
Common Stock, Dividends, Per Share, Declared |  |  |  |  |  |  | $ 0.26 |  |  |  |  |
Adoption of ASU | $ 17,656 |  | $ 7 |  | $ 16,917 |  | $ 2,382 |  | $ (1,146) |  | $ (504) |

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