Contingencies (Federal Government's Lawsuit Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Loss Contingencies [Line Items]
Loss Contingency Accrual, Provision	$ 5.0	$ 31.0	$ 48.0	$ 35.0
Federal Governments Lawsuit [Member] | Health Care Cost Recovery Litigation [Member]
Loss Contingencies [Line Items]
Federal Government Original Complaint Date			1999
Loss contingency, period of occurrence			August 2006
Loss Contingency Accrual, Provision	$ 0.0	$ 31.0	$ 0.0	$ 31.0
Amount of alleged annual costs health care programs, minimum			20,000.0
Amount of disgorgement of profits requested in Federal Government lawsuit			$ 280,000.0
Document Repository Agreement date			December 2011
Loss contingency, amount of district court deposit			$ 3.1
Loss contingency installment period, years			5