|
Goodwill and Other Intangible Assets (Goodwill) (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
|
| Goodwill [Roll Forward] | ||
| Goodwill, beginning of period | $ 4,720,275 | $ 4,478,038 |
| Acquisitions | 2,026 | 225,761 |
| Measurement periods adjustments | 2,338 | 16,476 |
| Goodwill, end of period | 4,724,639 | 4,720,275 |
| PBM | ||
| Goodwill [Roll Forward] | ||
| Goodwill, beginning of period | 4,700,610 | 4,458,373 |
| Acquisitions | 2,026 | 225,761 |
| Measurement periods adjustments | 2,338 | 16,476 |
| Goodwill, end of period | 4,704,974 | 4,700,610 |
| HCIT | ||
| Goodwill [Roll Forward] | ||
| Goodwill, beginning of period | 19,665 | 19,665 |
| Acquisitions | 0 | 0 |
| Measurement periods adjustments | 0 | 0 |
| Goodwill, end of period | $ 19,665 | $ 19,665 |