Financial Instruments (Securities Repurchase and Reverse Repurchase Arrangements) (Details) $ in Millions |
9 Months Ended |
|---|---|
|
Sep. 30, 2015
USD ($)
| |
| Financial Instruments [Line Items] | |
| Reverse Repurchase Agreements Maturities | P90D |
| Short-term borrowings | |
| Financial Instruments [Line Items] | |
| Securities for Reverse Repurchase Agreements | $ 132 |
| Cash and cash equivalents | |
| Financial Instruments [Line Items] | |
| Securities for Reverse Repurchase Agreements | $ 10,000 |