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Other Current Receivables (Notes)	6 Months Ended
Other Current Receivables (Notes)	Jun. 30, 2017
Other Current Receivables [Line Items]
Other Current Receivables [Text Block]	Other Current Receivables The Company’s pharmacy care services businesses contract with pharmaceutical manufacturers, some of which provide rebates based on use of the manufacturers’ products by the Company’s clients. As of June 30, 2017 and December 31, 2016, total pharmaceutical manufacturer rebates receivable included in other receivables in the Condensed Consolidated Balance Sheets amounted to $4.2 billion and $3.3 billion, respectively. See Note 2 of Notes to the Consolidated Financial Statements in Part II, Item 8, “Financial Statements” in the 2016 10-K for more information on the Company’s pharmaceutical manufacturer rebates.