Goodwill - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2018	Mar. 31, 2017	Jun. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill impairment charges				$ 3,106,000	$ 36,196,000	$ 28,415,000
Goodwill				6,841,960,000	6,610,279,000	6,015,375,000
Vascular access
Goodwill [Line Items]
Goodwill impairment charges		$ 24,198,000	$ 10,498,000		34,696,000	$ 28,415,000
Goodwill					0
International Operations
Goodwill [Line Items]
Goodwill impairment charges					$ 1,500,000
Reporting Units Other Than DaVita Medical Group
Goodwill [Line Items]
Goodwill impairment charges				0
GERMANY
Goodwill [Line Items]
Goodwill impairment charges	$ 3,106,000			3,106,000
GERMANY | International Operations
Goodwill [Line Items]
Goodwill				$ 12,646,000