Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended			3 Months Ended		1 Months Ended
	Dec. 31, 2011 California Claims Processing Matter [Member]	Mar. 31, 2014 Endoscopy Center of Southern Nevada Litigation [Member] class_action_lawsuit	Mar. 31, 2014 Endoscopy Center of Southern Nevada Litigation [Member] individual_lawsuit	Mar. 31, 2014 Endoscopy Center of Southern Nevada Litigation [Member] Compensatory Damages [Member]	Mar. 31, 2014 Endoscopy Center of Southern Nevada Litigation [Member] Punitive Damages [Member]	Sep. 30, 2013 Endoscopy Center of Southern Nevada Litigation [Member] Post-Trial Motions [Member]
Estimated Largest Aggregate Penalty Issued By Cdi	$ 8
CDI aggregate penalty	325
Loss Contingency, Damages Awarded, Value				$ 24	$ 500	$ 366
Individual Lawsuits [Line Items]		2	41