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Business Combinations - Salveo Specialty Pharmacy Acquisition - Additional Information (Details) (USD $)
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3 Months Ended | 0 Months Ended | |
|---|---|---|---|
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Mar. 31, 2015
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Mar. 31, 2014
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Jan. 02, 2015
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| Business Acquisition [Line Items] | |||
| Revenue | $ 5,979,260,000 | $ 4,914,479,000 | |
| Amortization of intangible assets | 52,619,000 | 54,986,000 | |
| Future amortization expense, remainder of 2015 | 151,500,000 | ||
| Salveo Specialty Pharmacy, Inc [Member] | |||
| Business Acquisition [Line Items] | |||
| Stated purchase price | 260,000,000 | ||
| Revenue | 157,800,000 | ||
| Goodwill expected to be tax deductible | 199,000,000 | ||
| Amortization of intangible assets | 2,500,000 | ||
| Future amortization expense, remainder of 2015 | $ 10,000,000 | ||