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Changes in Carrying Value of Goodwill by Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Beginning balance		$ 9,294,479	$ 9,415,295
Acquisitions		447,828	97,093
Divestitures		(44,759)	(8,781)
Goodwill impairment charges		(281,415)	(192,834)	$ (1,000)
Foreign currency and other adjustments		(8,816)	(16,294)
Ending balance	$ 9,294,479	9,407,317	9,294,479	9,415,295
Goodwill		9,883,410
Accumulated impairment charges		(476,093)
U.S. Dialysis And Related Lab Services
Goodwill [Line Items]
Beginning balance		5,629,183	5,610,643
Acquisitions		75,295	21,910
Divestitures		(12,891)	(3,370)
Ending balance	5,629,183	5,691,587	5,629,183	5,610,643
Goodwill		5,691,587
DaVita Medical Group (DMG)
Goodwill [Line Items]
Beginning balance		3,398,264	3,562,534
Acquisitions		248,901	29,910
Divestitures		(2,223)	(5,411)
Goodwill impairment charges	(188,769)	(253,000)	(188,769)
Ending balance	3,398,264	3,391,942	3,398,264	3,562,534
Goodwill		3,833,711
Accumulated impairment charges		(441,769)
Other ancillary services and strategic initiatives
Goodwill [Line Items]
Beginning balance		267,032	242,118
Acquisitions		123,632	45,273
Divestitures		(29,645)
Goodwill impairment charges		(28,415)	(4,065)
Foreign currency and other adjustments		(8,816)	(16,294)
Ending balance	$ 267,032	323,788	$ 267,032	$ 242,118
Goodwill		358,112
Accumulated impairment charges		$ (34,324)

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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