|
Significant Accounting Policies (Details) (USD $)
|
12 Months Ended |
|
|
Dec. 31, 2012
|
Dec. 31, 2014
|
Dec. 31, 2013
|
| Significant Accounting Policies [Line Items] |
|
|
|
| Amortization of intangible assets |
$ 8,000,000 |
|
|
| Goodwill |
4,478,038,000 |
4,724,639,000 |
4,720,275,000 |
| Unbilled rebates receivable |
|
366,700,000 |
54,600,000 |
| PBM |
|
|
|
| Significant Accounting Policies [Line Items] |
|
|
|
| Goodwill |
4,458,373,000 |
4,704,974,000 |
4,700,610,000 |
| HCIT |
|
|
|
| Significant Accounting Policies [Line Items] |
|
|
|
| Goodwill |
$ 19,665,000 |
19,665,000 |
$ 19,665,000 |
| Minimum |
|
|
|
| Significant Accounting Policies [Line Items] |
|
|
|
| Finite-lived intangibles, estimated useful life |
|
1 year |
|
| Minimum | Customer Relationships |
|
|
|
| Significant Accounting Policies [Line Items] |
|
|
|
| Finite-lived intangibles, estimated useful life |
|
3 years |
|
| Maximum |
|
|
|
| Significant Accounting Policies [Line Items] |
|
|
|
| Finite-lived intangibles, estimated useful life |
|
15 years |
|
| Maximum | Customer Relationships |
|
|
|
| Significant Accounting Policies [Line Items] |
|
|
|
| Finite-lived intangibles, estimated useful life |
|
10 years |
|
| Furniture and equipment |
|
|
|
| Significant Accounting Policies [Line Items] |
|
|
|
| Property and equipment, useful Life |
|
5 years |
|
| Computer equipment and software | Minimum |
|
|
|
| Significant Accounting Policies [Line Items] |
|
|
|
| Property and equipment, useful Life |
|
3 years |
|
| Computer equipment and software | Maximum |
|
|
|
| Significant Accounting Policies [Line Items] |
|
|
|
| Property and equipment, useful Life |
|
5 years |
|