Revenue Recognition (Net Provider Payments) (Details) (Ancillary Network, USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Ancillary Network
Segment Reporting Information [Line Items]
Revenues, net of provider payments	$ 1.6	$ 1.5	$ 2.9	$ 3.3