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Eaton Shareholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2015
Equity [Abstract] |
Comprehensive Income (Loss) | The following table summarizes the pre-tax and after-tax amounts recognized in Comprehensive income (loss):
| 2015 |  | 2014 |  | 2013
| Pre-tax |  | After-tax |  | Pre-tax |  | After-tax |  | Pre-tax |  | After-tax
Currency translation and related hedging instruments | $ | (1,080 | ) |  | $ | (1,078 | ) |  | $ | (1,014 | ) |  | $ | (1,019 | ) |  | $ | (30 | ) |  | $ | (28 | )
Pensions and other postretirement benefits |  |  |  |  |  |  |  |  |  |  |
Prior service credit (cost) arising during the year | 1 |  |  | 1 |  |  | 82 |  |  | 51 |  |  | (6 | ) |  | (4 | )
Net (loss) gain arising during the year | (123 | ) |  | (89 | ) |  | (718 | ) |  | (519 | ) |  | 456 |  |  | 277 |
Currency translation | 62 |  |  | 46 |  |  | 56 |  |  | 47 |  |  | (5 | ) |  | (4 | )
Other | — |  |  | (3 | ) |  | — |  |  | (4 | ) |  | 2 |  |  | 16 |
Amortization of actuarial loss and prior service cost reclassified to earnings | 237 |  |  | 156 |  |  | 168 |  |  | 110 |  |  | 229 |  |  | 144 |
| 177 |  |  | 111 |  |  | (412 | ) |  | (315 | ) |  | 676 |  |  | 429 |
Cash flow hedges |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on derivatives designated as cash flow hedges | 20 |  |  | 13 |  |  | (3 | ) |  | (2 | ) |  | 6 |  |  | 3 |
Changes in cash flow hedges reclassified to earnings | (16 | ) |  | (10 | ) |  | (5 | ) |  | (3 | ) |  | — |  |  | — |
Cash flow hedges, net of reclassification adjustments | 4 |  |  | 3 |  |  | (8 | ) |  | (5 | ) |  | 6 |  |  | 3 |
Other comprehensive (loss) income attributable to Eaton ordinary shareholders | $ | (899 | ) |  | $ | (964 | ) |  | $ | (1,434 | ) |  | $ | (1,339 | ) |  | $ | 652 |  |  | $ | 404 |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | The changes in Accumulated other comprehensive loss follow:
| Currency translation and related hedging instruments |  | Pensions and other postretirement benefits |  | Cash flow hedges |  | Total
Balance at December 31, 2014 | $ | (1,414 | ) |  | $ | (1,485 | ) |  | $ | — |  |  | $ | (2,899 | )
Other comprehensive (loss) income before reclassifications | (1,078 | ) |  | (45 | ) |  | 13 |  |  | (1,110 | )
Amounts reclassified from Accumulated other comprehensive loss (income) | — |  |  | 156 |  |  | (10 | ) |  | 146 |
Net current-period Other comprehensive (loss) income | (1,078 | ) |  | 111 |  |  | 3 |  |  | (964 | )
Balance at December 31, 2015 | $ | (2,492 | ) |  | $ | (1,374 | ) |  | $ | 3 |  |  | $ | (3,863 | )
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] | The reclassifications out of Accumulated other comprehensive loss follow:
|  | December 31, 2015 |  | Consolidated Statements of Income classification
Amortization of defined benefit pension and other postretirement benefits items |  |  |  |
Actuarial loss and prior service cost |  | $ | (237 | ) |  | 1
Tax benefit |  | 81 |  |  |
Total, net of tax |  | (156 | ) |  |
Gains and (losses) on cash flow hedges |  |  |  |
Currency exchange contracts |  | 16 |  |  | Cost of products sold
Tax expense |  | (6 | ) |  |
Total, net of tax |  | 10 |  |  |
Total reclassifications for the period |  | $ | (146 | ) |  |
1 These components of Accumulated other comprehensive loss are included in the computation of net periodic benefit cost. See Note 7 for additional information about defined benefit pension and other postretirement benefits items.
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | A summary of the calculation of net income per share attributable to Eaton ordinary shareholders follows:
(Shares in millions) | 2015 |  | 2014 |  | 2013
Net income attributable to Eaton ordinary shareholders | $ | 1,979 |  |  | $ | 1,793 |  |  | $ | 1,861 |
Weighted-average number of ordinary shares outstanding - diluted | 467.1 |  |  | 476.8 |  |  | 476.7 |
Less dilutive effect of equity-based compensation | 1.6 |  |  | 2.7 |  |  | 3.2 |
Weighted-average number of ordinary shares outstanding - basic | 465.5 |  |  | 474.1 |  |  | 473.5 |
Net income per share attributable to Eaton ordinary shareholders |  |  |  |  |
Diluted | $ | 4.23 |  |  | $ | 3.76 |  |  | $ | 3.90 |
Basic | 4.25 |  |  | 3.78 |  |  | 3.93 |

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