Commitments, Contingencies and Guarantees (Details) - state	1 Months Ended
	Aug. 31, 2014	Jan. 31, 2017
Rx Savings Program False Claims Act Lawsuit [Member]
Commitments, Contingencies and Guarantees
Number of states failed to report Rx savings prices		18
Civil Investigative Demand Regarding Code 1 Drugs [Member]
Commitments, Contingencies and Guarantees
The number of states attorneys general declined to intervene in action	8