Shareholders' Equity Repurchase Activity (Details) $ in Billions |
9 Months Ended |
|---|---|
|
Sep. 30, 2017
USD ($)
shares
| |
| Class of Stock [Line Items] | |
| Treasury Stock, Shares, Acquired | shares | 0 |
| Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ | $ 5.7 |
| Treasury Stock Shares Acquired From Inception | shares | 201,000,000 |
| Treasury Stock Value Acquired Cost Method From Inception | $ | $ 8.4 |