Goodwill And Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Goodwill	$ 3,303,818,000			$ 3,303,818,000			$ 1,758,970,000
Increase in goodwill				1,557,032,000
Goodwill deductible for tax purposes	25,100,000		56,200,000	25,100,000		56,200,000
Amortization of Intangible Assets	13,700,000		1,200,000	16,200,000		3,400,000
Estimated amortization of intangible assets, remainder of 2014	16,100,000			16,100,000
Estimated amortization of intangible assets, 2015	64,200,000			64,200,000
Estimated amortization of intangible assets, 2016	63,500,000			63,500,000
Estimated amortization of intangible assets, 2017	58,400,000			58,400,000
Estimated amortization of intangible assets, 2018	56,700,000			56,700,000
Estimated amortization of intangible assets, 2019	55,700,000			55,700,000
Estimated amortization of intangible assets, 2020 and thereafter	709,400,000			709,400,000
Weighted average amortization period				18 years 255 days
Ambulatory Services [Member]
Segment Reporting Information [Line Items]
Goodwill	1,800,000,000			1,800,000,000
Increase in goodwill				75,600,000
Physician Services [Member]
Segment Reporting Information [Line Items]
Goodwill	1,500,000,000			1,500,000,000
Sheridan Healthcare [Member]
Segment Reporting Information [Line Items]
Goodwill	1,512,663,000	[1]		1,512,663,000	[1]
Deferred financing costs	52,900,000			52,900,000
Intangible assets	1,200,028,000	[1]		1,200,028,000	[1]
Amount estimated to be amortized over weighted average period	1,000,000,000			1,000,000,000
Weighted average period of amortization	20 years
Interest Expense [Member] | Bridge Loan [Member] | Sheridan Healthcare [Member]
Segment Reporting Information [Line Items]
Fees paid to obtain a commitment for financing	$ 12,800,000

[1] The allocation of fair value of acquired assets and liabilities associated with the Sheridan acquisition is preliminary at September 30, 2014.