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Earnings 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		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Net income from continuing operations	$ 199,603	$ 151,292	$ 390,618	$ 592,197
Change in noncontrolling interest redemption rights in excess of fair value	(98)	0	(98)	0
Net income from continuing operations for basic earnings per share calculation	199,505	151,292	390,520	592,197
Net income (loss) from discontinued operations	67,673	(24,291)	55,344	(17,499)
Net income attributable to DaVita Inc. for basic earnings per share calculation	$ 267,178	$ 127,001	$ 445,864	$ 574,698
Basic:
Weighted Average Number of Shares Issued, Basic	173,811,000	193,282,000	177,461,000	193,923,000
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)	171,617,238	191,088,216	175,267,270	191,728,913
Basic net income from continuing operations per share attributable to DaVita Inc.	$ 1.16	$ 0.79	$ 2.23	$ 3.09
Basic net income (loss) from discontinued operations per share attributable to DaVita Inc.	0.40	(0.13)	0.31	(0.09)
Basic net (loss) income per share attributable to DaVita Inc. (usd per share)	$ 1.56	$ 0.66	$ 2.54	$ 3.00
Diluted:
Weighted Average Number of Shares Issued, Basic	173,811,000	193,282,000	177,461,000	193,923,000
Assumed incremental shares from stock plans (in shares)	295,000	706,000	489,000	708,000
Weighted average shares for diluted earnings per share calculation (in shares)	174,105,884	193,987,983	177,949,934	194,630,936
Diluted net income from continuing operations per share attributable to DaVita Inc.	$ 1.15	$ 0.78	$ 2.19	$ 3.04
Discontinued Operation, Income (Loss) from Discontinued Operation, Net of Tax, Per Diluted Share	0.38	(0.13)	0.32	(0.09)
Diluted net (loss) income per share attributable to DaVita Inc. (usd per share)	$ 1.53	$ 0.65	$ 2.51	$ 2.95
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	6,227,000	3,780,000	4,840,000	3,603,000

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