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Earnings (loss) per share - Reconciliations of Numerators and Denominators Used to Calculate Basic and Diluted Earnings Per Share (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Basic:        
Net (loss) income attributable to DaVita Inc. $ (214,476) $ 571,332 $ 360,222 $ 722,148
Weighted average shares outstanding during the period (in shares) 191,078,000 205,955,000 192,964,000 206,401,000
Contingently returnable shares held in escrow from the DaVita HealthCare Partners merger (in shares) (2,194,000) (2,194,000) (2,194,000) (2,194,000)
Weighted average shares for basic earnings per share calculation (in shares) 188,883,922 203,761,433 190,770,165 204,206,979
Basic net (loss) income per share attributable to DaVita Inc. (usd per share) $ (1.14) $ 2.80 $ 1.89 $ 3.54
Diluted:        
Net (loss) income attributable to DaVita Inc. $ (214,476) $ 571,332 $ 360,222 $ 722,148
Weighted average shares outstanding during the period (in shares) 191,078,000 205,955,000 192,964,000 206,401,000
Contingently returnable shares held in escrow from the DaVita HealthCare Partners merger (in shares) 2,194,000 0 0 0
Assumed incremental shares from stock plans (in shares) 0 1,006,000 582,000 1,243,000
Weighted average shares for diluted earnings per share calculation (in shares) 188,883,922 206,961,450 193,546,245 207,643,794
Diluted net (loss) income per share attributable to DaVita Inc. (usd per share) $ (1.14) $ 2.76 $ 1.86 $ 3.48
Anti-dilutive potential common shares excluded from calculation (in shares) 8,510,000 2,375,000 5,239,000 2,153,000