Stock Compensation - Granted Awards Activity (Details) shares in Millions |
3 Months Ended |
|---|---|
|
Mar. 31, 2018
$ / shares
shares
| |
| Restricted Stock Units (RSUs) [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Other than options - Granted | shares | 0.6 |
| Other than options - Weighted Average Per Share Grant Date Fair Value | $ / shares | $ 28.33 |
| Performance Share Units [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Other than options - Granted | shares | 0.2 |
| Other than options - Weighted Average Per Share Grant Date Fair Value | $ / shares | $ 27.13 |