| Three Months Ended June 30, 2016 (Millions), net of tax | | Net Unrealized Gains (Losses) on Investment Securities | | Foreign Currency Translation Adjustments | | Net Unrealized Pension and Other Postretirement Benefit (Losses) Gains | | Accumulated Other Comprehensive (Loss) Income |
| Balances as of March 31, 2016 | | $ | 60 | | $ | (2,040) | | $ | (522) | | $ | (2,502) |
| Net unrealized gains | | | 5 | | | ― | | | ― | | | 5 |
| Increase (decrease) due to amounts reclassified into earnings | | | ― | | | ― | | | ― | | | ― |
| Net translation loss of investments in foreign operations | | | ― | | | (265) | | | ― | | | (265) |
| Net gains related to hedges of investments in foreign operations | | | ― | | | 135 | | | ― | | | 135 |
| Pension and other postretirement benefit gains | | | ― | | | ― | | | 6 | | | 6 |
| Net change in accumulated other comprehensive loss | | | 5 | | | (130) | | | 6 | | | (119) |
| Balances as of June 30, 2016 | | $ | 65 | | $ | (2,170) | | $ | (516) | | $ | (2,621) |
| | | | | | | | | | | | |
| Six Months Ended June 30, 2016 (Millions), net of tax | | Net Unrealized Gains (Losses) on Investment Securities | | Foreign Currency Translation Adjustments | | Net Unrealized Pension and Other Postretirement Benefit (Losses) Gains | | Accumulated Other Comprehensive (Loss) Income |
| Balances as of December 31, 2015 | | $ | 58 | | $ | (2,044) | | $ | (548) | | $ | (2,534) |
| Net unrealized gains | | | 9 | | | ― | | | ― | | | 9 |
| Decrease due to amounts reclassified into earnings | | | (2) | | | ― | | | ― | | | (2) |
| Net translation loss of investments in foreign operations | | | ― | | | (169) | | | ― | | | (169) |
| Net gains related to hedges of investments in foreign operations | | | ― | | | 43 | | | ― | | | 43 |
| Pension and other postretirement benefit gains | | | ― | | | ― | | | 32 | | | 32 |
| Net change in accumulated other comprehensive loss | | | 7 | | | (126) | | | 32 | | | (87) |
| Balances as of June 30, 2016 | | $ | 65 | | $ | (2,170) | | $ | (516) | | $ | (2,621) |
| | | | | | | | | | | | |
| Three Months Ended June 30, 2015 (Millions), net of tax | | Net Unrealized Gains (Losses) on Investment Securities | | Foreign Currency Translation Adjustments | | Net Unrealized Pension and Other Postretirement Benefit (Losses) Gains | | Accumulated Other Comprehensive (Loss) Income |
| Balances as of March 31, 2015 | | $ | 96 | | $ | (1,754) | | $ | (493) | | $ | (2,151) |
| Net unrealized loss | | | (20) | | | ― | | | ― | | | (20) |
| Decrease due to amounts reclassified into earnings | | | ― | | | (1) | | | ― | | | (1) |
| Net translation gain of investments in foreign operations | | | ― | | | 45 | | | ― | | | 45 |
| Net losses related to hedges of investments in foreign operations | | | ― | | | (33) | | | ― | | | (33) |
| Pension and other postretirement benefit gains | | | ― | | | ― | | | 6 | | | 6 |
| Net change in accumulated other comprehensive loss | | | (20) | | | 11 | | | 6 | | | (3) |
| Balances as of June 30, 2015 | | $ | 76 | | $ | (1,743) | | $ | (487) | | $ | (2,154) |
| | | | | | | | | | | | |
| Six Months Ended June 30, 2015 (Millions), net of tax | | Net Unrealized Gains (Losses) on Investment Securities | | Foreign Currency Translation Adjustments | | Net Unrealized Pension and Other Postretirement Benefit (Losses) Gains | | Accumulated Other Comprehensive (Loss) Income |
| Balances as of December 31, 2014 | | $ | 96 | | $ | (1,499) | | $ | (516) | | $ | (1,919) |
| Net unrealized loss | | | (20) | | | ― | | | ― | | | (20) |
| Decrease due to amounts reclassified into earnings | | | ― | | | (1) | | | ― | | | (1) |
| Net translation loss of investments in foreign operations | | | ― | | | (405) | | | ― | | | (405) |
| Net gains related to hedges of investments in foreign operations | | | ― | | | 162 | | | ― | | | 162 |
| Pension and other postretirement benefit gains | | | ― | | | ― | | | 29 | | | 29 |
| Net change in accumulated other comprehensive loss | | | (20) | | | (244) | | | 29 | | | (235) |
| Balances as of June 30, 2015 | | $ | 76 | | $ | (1,743) | | $ | (487) | | $ | (2,154) |