Goodwill And Intangible Assets (Narrative) (Details) (USD $)	12 Months Ended				3 Months Ended		6 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014 physician_practice		Dec. 31, 2014 physician_practice
Segment Reporting Information [Line Items]
Goodwill	$ 3,381,149,000		$ 1,758,970,000	$ 1,652,002,000	3,381,149,000		3,381,149,000
Increase in goodwill	1,636,521,000		112,951,000
Amortization period	18 years 110 days
Debt extinguishment costs	4,536,000		0	0
Amortization of Intangible Assets	32,500,000		2,200,000	1,400,000
Estimated amortization of intangible assets, 2015	64,700,000				64,700,000		64,700,000
Estimated amortization of intangible assets, 2016	63,800,000				63,800,000		63,800,000
Estimated amortization of intangible assets, 2017	62,500,000				62,500,000		62,500,000
Estimated amortization of intangible assets, 2018	61,600,000				61,600,000		61,600,000
Estimated amortization of intangible assets, 2019	59,100,000				59,100,000		59,100,000
Estimated amortization of intangible assets, 2020 and thereafter	724,200,000				724,200,000		724,200,000
Ambulatory Services [Member]
Segment Reporting Information [Line Items]
Goodwill	1,900,000,000				1,900,000,000		1,900,000,000
Increase in goodwill	131,200,000
Goodwill deductible for tax purposes	51,700,000		70,200,000		51,700,000		51,700,000
Physician Services [Member]
Segment Reporting Information [Line Items]
Goodwill	1,500,000,000				1,500,000,000		1,500,000,000
Goodwill deductible for tax purposes	12,800,000				12,800,000		12,800,000
Sheridan Healthcare [Member]
Segment Reporting Information [Line Items]
Goodwill	1,534,656,000	[1]			1,534,656,000	[1]	1,534,656,000	[1]
Deferred financing costs	53,000,000				53,000,000		53,000,000
Debt extinguishment costs	4,500,000
Intangible assets	1,200,028,000	[1]			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		1,000,000,000
Weighted average period of amortization	20 years
Series of Individually Immaterial Business Acquisitions [Member]
Segment Reporting Information [Line Items]
Goodwill	101,865,000		116,243,000		101,865,000		101,865,000
Intangible assets	14,207,000		0		14,207,000		14,207,000
Series of Individually Immaterial Business Acquisitions [Member] | Physician Services [Member]
Segment Reporting Information [Line Items]
Number of business acquisitions					2		2
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
Customer Relationships [Member]
Segment Reporting Information [Line Items]
Amortization period	20 years
Deferred Financing Costs, Amortizable Non-Compete Agreements, and Customer Agreements [Member] | Minimum [Member]
Segment Reporting Information [Line Items]
Amortization period	5 years
Deferred Financing Costs, Amortizable Non-Compete Agreements, and Customer Agreements [Member] | Maximum [Member]
Segment Reporting Information [Line Items]
Amortization period	10 years
Capitalized software [Member] | Minimum [Member]
Segment Reporting Information [Line Items]
Amortization period	3 years
Capitalized software [Member] | Maximum [Member]
Segment Reporting Information [Line Items]
Amortization period	8 years

[1] allocation of fair value of acquired assets and liabilities associated with these acquisitions at December 31, 2014.