Common Stock Common Stock (Accelerated Share Repurchase) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
1 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2015 |
Apr. 30, 2015 |
Sep. 30, 2015 |
Apr. 06, 2015 |
|
| Accelerated Share Repurchases [Line Items] | ||||
| Stock Repurchase Program, Authorized Amount | $ 1,500 | |||
| Payments for Repurchase of Common Stock | $ 1,500 | $ 1,500 | ||
| Delivered Shares from Dealers | 3.2 | 16.6 | 19.8 | |
| Fair Market Value of Delivered Shares | $ 225 | $ 1,275 | $ 1,500 | |
| Percentage of ASR common stock received | 85.00% | |||
| Forward Contracts Indexed to Issuer's Equity, Value | $ 225 | |||
| Accelerated Share Repurchases, Final Price Paid Per Share | $ 75.75 | |||
| Goldman Sachs [Member] | ||||
| Accelerated Share Repurchases [Line Items] | ||||
| Payments for Repurchase of Common Stock | 750 | |||
| JPMorgan Chase [Member] | ||||
| Accelerated Share Repurchases [Line Items] | ||||
| Payments for Repurchase of Common Stock | $ 750 | |||