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Selected Quarterly Financial Data (unaudited) Selected Quarterly Financial Data - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Jun. 30, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]                      
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain $ (28,152)               $ (28,152)    
Income tax expense                 258,400 $ 323,859 $ 431,761
Valuation adjustment on disposal group                 316,840 0 0
Equity investment (loss) income                 (4,484) (8,640) 16,874
Restructuring Charges         $ 9,569            
Loss Contingency Accrual, Period Increase (Decrease)         11,100 $ 3,600          
Investment and other asset impairments                 17,338 295,234 14,993
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost   $ 23,470             14,704    
Goodwill impairment charges                 3,106 36,196 28,415
Gain (loss) related to litigation settlement                 0 526,827 0
APAC JV - Deconsolidated Noncontrolling Entity                      
Schedule of Equity Method Investments [Line Items]                      
Equity Method Investment, Realized Gain (Loss) on Disposal             $ (6,273)        
Equity investment (loss) income 1,530 5,995     6,293       (4,484) (8,640) 16,874
Equity Method Investment, Other than Temporary Impairment       $ 280,066              
Paladina - Direct Primary Care                      
Schedule of Equity Method Investments [Line Items]                      
Equity Method Investment, Realized Gain (Loss) on Disposal   1,506 $ 35,205                
Tandigm Health                      
Schedule of Equity Method Investments [Line Items]                      
Equity Method Investment, Realized Gain (Loss) on Disposal     25,096                
Business Combination, Bargain Purchase, Gain Recognized, Amount         (17,129)            
INDIA | APAC JV - Deconsolidated Noncontrolling Entity                      
Schedule of Equity Method Investments [Line Items]                      
Equity investment (loss) income 8,715                    
GERMANY                      
Schedule of Equity Method Investments [Line Items]                      
Goodwill impairment charges     3,106           3,106    
DaVita Rx - Pharmacy                      
Schedule of Equity Method Investments [Line Items]                      
Restructuring Charges   11,366                  
Investment and other asset impairments   6,093                  
Asset Impairment Charges     11,245       15,168        
International Operations                      
Schedule of Equity Method Investments [Line Items]                      
Equity Method Investment, Realized Gain (Loss) on Disposal     $ 1,248                
Restructuring Charges         2,700            
Goodwill impairment charges                   1,500  
Vascular access                      
Schedule of Equity Method Investments [Line Items]                      
Goodwill impairment charges             24,198 $ 10,498   34,696 28,415
U.S. Department of Veterans Affairs (VA)                      
Schedule of Equity Method Investments [Line Items]                      
Gain (loss) related to litigation settlement             $ (529,504)     527,000  
DMG - Held for sale                      
Schedule of Equity Method Investments [Line Items]                      
Goodwill impairment charges         $ 601,040 $ 50,619          
DMG - Held for sale | Discontinued Operations, Held-for-sale                      
Schedule of Equity Method Investments [Line Items]                      
Income tax expense       $ 163,555              
Valuation adjustment on disposal group 218,639 98,201             316,840    
Goodwill impairment charges 41,537               41,537 $ 651,659 $ 253,000
Tax expense related to valuation adjustment, disposal group, including discontinued operation $ 8,318 117,946             109,628    
Valuation Charge To Record Valuation Allowance And Related Tax Expense, Disposal Group, Including Discontinued Operations   $ 216,147             $ 468,005