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Earnings Per Share (Notes) | 12 Months Ended
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Sep. 30, 2017
Earnings Per Share [Abstract] |
EARNINGS PER SHARE | EARNINGS PER SHARE The Company presents both basic and diluted EPS amounts. Basic EPS is calculated by dividing net income attributable to Johnson Controls by the weighted average number of ordinary shares outstanding during the reporting period. Diluted EPS is calculated by dividing net income attributable to Johnson Controls by the weighted average number of ordinary shares and ordinary equivalent shares outstanding during the reporting period that are calculated using the treasury stock method for stock options, unvested restricted stock and unvested performance share awards. The treasury stock method assumes that the Company uses the proceeds from the exercise of stock option awards to repurchase ordinary shares at the average market price during the period. The assumed proceeds under the treasury stock method include the purchase price that the grantee will pay in the future, compensation cost for future service that the Company has not yet recognized and any windfall tax benefits that would be credited to capital in excess of par value when the award generates a tax deduction. If there would be a shortfall resulting in a charge to capital in excess of par value, such an amount would be a reduction of the proceeds. For unvested restricted stock and unvested performance share awards, assumed proceeds under the treasury stock method would include unamortized compensation cost and windfall tax benefits or shortfalls. The following table reconciles the numerators and denominators used to calculate basic and diluted earnings per share (in millions):
| Year Ended September 30,
| 2017 |  | 2016 |  | 2015
Income (Loss) Available to Ordinary Shareholders |  |  |  |  |
Income from continuing operations | $ | 1,654 |  |  | $ | 732 |  |  | $ | 814 |
Income (loss) from discontinued operations | (43 | ) |  | (1,600 | ) |  | 749 |
Basic and diluted income (loss) available to shareholders | $ | 1,611 |  |  | $ | (868 | ) |  | $ | 1,563 |
Weighted Average Shares Outstanding |  |  |  |  |
Basic weighted average shares outstanding | 935.3 |  |  | 667.4 |  |  | 655.2 |
Effect of dilutive securities: |  |  |  |  |
Stock options, unvested restricted stock and unvested performance share awards | 9.3 |  |  | 5.2 |  |  | 6.3 |
Diluted weighted average shares outstanding | 944.6 |  |  | 672.6 |  |  | 661.5 |
Antidilutive Securities |  |  |  |  |
Options to purchase common shares | 0.2 |  |  | — |  |  | 0.4 |
During the three months ended September 30, 2017 and 2016, the Company declared a dividend of $0.25 and $0.29, respectively, per share. During the twelve months ended September 30, 2017 and 2016, the Company declared four quarterly dividends totaling $1.00 and $1.16, respectively, per share.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1278-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64863997&loc=d3e1252-109256 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=65016374&loc=d3e4984-109258 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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