Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended	1 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Sep. 30, 2009
Specialty Pharmaceutical Management
Insurance
Period for which insurance policies have been renewed	1 year
General liability
Insurance
Period for which insurance policies have been renewed	1 year
Per claim un-aggregated self-insured retention	0.05
General liability | Specialty Pharmaceutical Management
Insurance
Per claim self-insured retention	0.05
Aggregated self-insured retention	0.25
Professional liability
Insurance
Period for which insurance policies have been renewed	1 year
Per claim un-aggregated self-insured retention	0.05
Professional liability | Behavioral health direct care facilities
Insurance
Period for which insurance policies have been renewed			5 years
Per claim un-aggregated self-insured retention			0.50
Period for which insurance policies have been extended		2 years
Per claim un-aggregated self-insured retention for extended insurance policies		0.5
Professional liability | Specialty Pharmaceutical Management
Insurance
Per claim self-insured retention	0.05
Aggregated self-insured retention	0.25
Managed care liability
Insurance
Period for which insurance policies have been renewed	1 year
Per claim un-aggregated self-insured retention	1.00
Per class action claim un-aggregated self-insured retention	10.0