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Goodwill - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Goodwill [Line Items]              
Goodwill and other intangible asset impairment charges     $ 206,169        
Goodwill impaired facts and circumstances leading to impairment description       Based on continuing developments at the Company’s DMG reporting units during 2016, including the Medicare Advantage final benchmark rates for 2017 announced on April 4, 2016, further changes in expectations concerning future government reimbursement rates and the Company’s expected ability to mitigate them, as well as medical cost and utilization trends, underperformance of certain at-risk units in recent quarters and other market conditions, the Company performed additional impairment assessments for certain at-risk DMG reporting units during each of the first three quarters of 2016.      
Goodwill impairment charges       $ 253,000 $ 4,065 $ 192,834  
Goodwill     9,294,479 $ 9,382,996   9,294,479 $ 9,415,295
Goodwill impairment charge description       For example, a sustained, long-term reduction of 3% in operating income for DMG Nevada or DMG Florida could reduce their estimated fair values by up to 2.5% and 1.9%, respectively. Separately, an increase in their respective discount rates of 100 basis points could reduce the estimated fair values of DMG Nevada and DMG Florida by up to 5.5% and 4.9%, respectively. Similarly, a long-term reduction of 3% in operating income or, separately, an increase in the discount rate of 100 basis points could reduce the estimated fair value of Lifeline vascular access by up to 2.6% and 5.0%.      
DaVita Medical Group (DMG)              
Goodwill [Line Items]              
Goodwill impairment charges       $ 253,000   188,769  
Goodwill     $ 3,398,264 $ 3,391,942   $ 3,398,264 $ 3,562,534
DaVita Medical Group (DMG) | Long-term Reduction of 3% Percent Operating Income              
Goodwill [Line Items]              
Decrease in operating income percentage used for assessment of fair values       3.00%      
DaVita Medical Group (DMG) | Increase In Discount Rates By 100 Basis Points              
Goodwill [Line Items]              
Increase in discount rates used for assessment of fair values       1.00%      
DaVita Medical Group (DMG) | Nevada              
Goodwill [Line Items]              
Goodwill impairment charges $ 79,000 $ 77,000          
Goodwill       $ 261,204      
Percentage of fair value in excess of (short of) carrying amount       (27.80%)      
DaVita Medical Group (DMG) | Nevada | Long-term Reduction of 3% Percent Operating Income              
Goodwill [Line Items]              
Percentage of Fair value in excess of carrying amount       2.50%      
DaVita Medical Group (DMG) | Nevada | Increase In Discount Rates By 100 Basis Points              
Goodwill [Line Items]              
Percentage of Fair value in excess of carrying amount       5.50%      
DaVita Medical Group (DMG) | Florida              
Goodwill [Line Items]              
Goodwill impairment charges $ 97,000            
Goodwill       $ 442,835      
Percentage of fair value in excess of (short of) carrying amount       (1.50%)      
DaVita Medical Group (DMG) | Florida | Long-term Reduction of 3% Percent Operating Income              
Goodwill [Line Items]              
Percentage of Fair value in excess of carrying amount       1.90%      
DaVita Medical Group (DMG) | Florida | Increase In Discount Rates By 100 Basis Points              
Goodwill [Line Items]              
Percentage of Fair value in excess of carrying amount       4.90%      
DaVita Medical Group (DMG) | Colorado              
Goodwill [Line Items]              
Goodwill       $ 16,897      
Percentage of fair value in excess of (short of) carrying amount       15.40%      
Lifeline Vascular Access              
Goodwill [Line Items]              
Goodwill       $ 63,111      
Percentage of fair value in excess of (short of) carrying amount       14.00%      
Lifeline Vascular Access | Long-term Reduction of 3% Percent Operating Income              
Goodwill [Line Items]              
Decrease in operating income percentage used for assessment of fair values       3.00%      
Percentage of Fair value in excess of carrying amount       2.60%      
Lifeline Vascular Access | Increase In Discount Rates By 100 Basis Points              
Goodwill [Line Items]              
Percentage of Fair value in excess of carrying amount       5.00%      
Increase in discount rates used for assessment of fair values       1.00%