Financial Instruments (Fair value hedges) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2015 |
Sep. 30, 2014 |
|
| Fair value hedges | ||||
| Gain (loss) on derivatives | $ (603.0) | |||
| Hedge ineffectiveness gain (loss) | $ 3.0 | $ (9.0) | $ (82.0) | (74.0) |
| Interest Rate Contract | ||||
| Fair value hedges | ||||
| Gain (loss) on derivatives | (101.0) | |||
| Interest Rate Contract | Fair Value Hedges [Member] | ||||
| Fair value hedges | ||||
| Gain (loss) on derivatives | 1,391.0 | 341.0 | 514.0 | 2,056.0 |
| Gain (loss) on hedged items | (1,387.0) | (350.0) | (594.0) | (2,129.0) |
| Foreign Exchange Contract | ||||
| Fair value hedges | ||||
| Gain (loss) on derivatives | (2,486.0) | |||
| Foreign Exchange Contract | Fair Value Hedges [Member] | ||||
| Fair value hedges | ||||
| Gain (loss) on derivatives | (6.0) | (8.0) | (6.0) | (11.0) |
| Gain (loss) on hedged items | $ 5.0 | $ 8.0 | $ 4.0 | $ 10.0 |