v2.4.0.8

Shareholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2014
Shareholders' Equity |
Changes in accumulated other comprehensive loss, net of tax | The changes in accumulated other comprehensive loss, presented net of tax, were as follows (in millions):
|  | Three months ended June 30, 2014 |  | Three months ended June 30, 2013 |
|  | Defined benefit pension plans |  | Derivative instruments |  | Total |  | Defined benefit pension plans |  | Derivative instruments |  | Total |
Balance, beginning of period |  | $ | (263 | ) | $ | — |  | $ | (263 | ) | $ | (533 | ) | $ | (7 | ) | $ | (540 | )
Other comprehensive income (loss) before reclassifications |  | 78 |  | — |  | 78 |  | 84 |  | (1 | ) | 83 |
Reclassifications to net income |  | (3 | ) | — |  | (3 | ) | 12 |  | 11 |  | 23 |
Other comprehensive income, net |  | 75 |  | — |  | 75 |  | 96 |  | 10 |  | 106 |
Balance, end of period |  | $ | (188 | ) | $ | — |  | $ | (188 | ) | $ | (437 | ) | $ | 3 |  | $ | (434 | )
|  | Six months ended June 30, 2014 |  | Six months ended June 30, 2013 |
|  | Defined benefit pension plans |  | Derivative instruments |  | Total |  | Defined benefit pension plans |  | Derivative instruments |  | Total |
Balance, beginning of period |  | $ | (264 | ) | $ | 2 |  | $ | (262 | ) | $ | (511 | ) | $ | (10 | ) | $ | (521 | )
Other comprehensive income (loss) before reclassifications |  | 73 |  | — |  | 73 |  | 49 |  | (5 | ) | 44 |
Reclassifications to net income |  | 3 |  | (2 | ) | 1 |  | 25 |  | 18 |  | 43 |
Other comprehensive income (loss), net |  | 76 |  | (2 | ) | 74 |  | 74 |  | 13 |  | 87 |
Balance, end of period |  | $ | (188 | ) | $ | — |  | $ | (188 | ) | $ | (437 | ) | $ | 3 |  | $ | (434 | )
Schedule of significant reclassifications from accumulated other comprehensive income to net income | Significant reclassifications from accumulated other comprehensive income to net income included the following (in millions):
|  |  |  | Three months ended June 30, |  | Six months ended June 30, |
|  | Statement of operations classification |  | 2014 |  | 2013 |  | 2014 |  | 2013 |
Defined benefit pension plans |  |  |  |  |  |  |  |  |  |  |
Actuarial losses |  |  |  | $ | 6 |  | $ | 14 |  | $ | 12 |  | $ | 28 |
Prior service costs |  |  |  | (1 | ) | (1 | ) | (1 | ) | (1 | )
Settlements and curtailments |  |  |  | (5 | ) | — |  | (5 | ) | — |
Total amortization, before income taxes |  | Net periodic benefit costs (a) |  | — |  | 13 |  | 6 |  | 27 |
Income tax benefit |  | Income tax expense |  | (3 | ) | (1 | ) | (3 | ) | (2 | )
Total amortization, net of income taxes |  |  |  | $ | (3 | ) | $ | 12 |  | $ | 3 |  | $ | 25 |
(a) We recognize the amortization of accumulated other comprehensive income components related to defined benefit pension plans in net periodic benefit costs. In the three and six months ended June 30, 2014, the amortization components of our net periodic benefit costs were less than $1 million and $4 million, recorded in operating and maintenance costs, and less than $1 million and $2 million, recorded in general and administrative costs, respectively. In the three and six months ended June 30, 2013, the amortization components of our net periodic benefit costs were $10 million and $21 million, recorded in operating and maintenance costs, and $3 million and $6 million, recorded in general and administrative costs, respectively. See Note 12—Postemployment Benefit Plans.

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