The following table summarizes the changes in accumulated balances of other comprehensive income for the three months ended September 30, 2016: | | | | | | | | | | | | | | | | | | | | | Three Months Ended September 30, 2016 | Unrealized Gains (Losses) on Cash Flow Hedges | | Unrealized Gains (Losses) on Investments | | Foreign Currency Translation | | Estimated tax (expense) benefit | | Total | | (In millions) | Beginning balance | $ | 100 |
| | $ | 5 |
| | $ | (50 | ) | | $ | (3 | ) | | $ | 52 |
| Other comprehensive income (loss) before reclassifications | 15 |
| | (4 | ) | | 1 |
| | 2 |
| | 14 |
| Less: Amount of gain (loss) reclassified from accumulated other comprehensive income | 28 |
| | (1 | ) | | — |
| | — |
| | 27 |
| Net current period other comprehensive income (loss) | (13 | ) | | (3 | ) | | 1 |
| | 2 |
| | (13 | ) | Ending balance | $ | 87 |
| | $ | 2 |
| | $ | (49 | ) | | $ | (1 | ) | | $ | 39 |
|
The following table summarizes the changes in accumulated balances of other comprehensive income for the three months ended September 30, 2015: | | | | | | | | | | | | | | | | | | | | | Three Months Ended September 30, 2015 | Unrealized Gains (Losses) on Cash Flow Hedges | | Unrealized Gains (Losses) on Investments | | Foreign Currency Translation | | Estimated tax (expense) benefit | | Total | | (In millions) | Beginning balance | $ | 66 |
| | $ | (2 | ) | | $ | (40 | ) | | $ | — |
| | $ | 24 |
| Other comprehensive income (loss) before reclassifications | 31 |
| | (6 | ) | | (9 | ) | | 1 |
| | 17 |
| Less: Amount of gain reclassified from accumulated other comprehensive income | 38 |
| | — |
| | — |
| | — |
| | 38 |
| Net current period other comprehensive income (loss) | (7 | ) | | (6 | ) | | (9 | ) | | 1 |
| | (21 | ) | Ending balance | $ | 59 |
| | $ | (8 | ) | | $ | (49 | ) | | $ | 1 |
| | $ | 3 |
|
The following table summarizes the changes in accumulated balances of other comprehensive income for the nine months ended September 30, 2016: | | | | | | | | | | | | | | | | | | | | | Nine Months Ended September 30, 2016 | Unrealized Gains (Losses) on Cash Flow Hedges | | Unrealized Gains (Losses) on Investments | | Foreign Currency Translation | | Estimated tax (expense) benefit | | Total | | (In millions) | Beginning balance | $ | 57 |
| | $ | (16 | ) | | $ | (53 | ) | | $ | 3 |
| | $ | (9 | ) | Other comprehensive income (loss) before reclassifications | 99 |
| | 14 |
| | 4 |
| | (4 | ) | | 113 |
| Less: Amount of gain (loss) reclassified from accumulated other comprehensive income | 69 |
| | (4 | ) | | — |
| | — |
| | 65 |
| Net current period other comprehensive income (loss) | 30 |
| | 18 |
| | 4 |
| | (4 | ) | | 48 |
| Ending balance | $ | 87 |
| | $ | 2 |
| | $ | (49 | ) | | $ | (1 | ) | | $ | 39 |
|
The following table summarizes the changes in accumulated balances of other comprehensive income for the nine months ended September 30, 2015: | | | | | | | | | | | | | | | | | | | | | Nine Months Ended September 30, 2015 | Unrealized Gains (Losses) on Cash Flow Hedges | | Unrealized Gains (Losses) on Investments | | Foreign Currency Translation | | Estimated tax (expense) benefit | | Total | | (In millions) | Beginning balance | $ | 126 |
| | $ | — |
| | $ | (16 | ) | | $ | — |
| | $ | 110 |
| Other comprehensive income (loss) before reclassifications | 83 |
| | (8 | ) | | (33 | ) | | 1 |
| | 43 |
| Less: Amount of gain reclassified from accumulated other comprehensive income | 150 |
| | — |
| | — |
| | — |
| | 150 |
| Net current period other comprehensive income (loss) | (67 | ) | | (8 | ) | | (33 | ) | | 1 |
| | (107 | ) | Ending balance | $ | 59 |
| | $ | (8 | ) | | $ | (49 | ) | | $ | 1 |
| | $ | 3 |
|
|