Supplemental Data - Condensed Consolidating Balance Sheets (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Balance Sheet Statements Captions [Line Items]
Cash and cash equivalents	$ 3,575,638	$ 323,038
Restricted cash and equivalents	106,772	92,382
Accounts receivable, net	2,010,801	1,858,608
Other current assets	697,418	760,566
Total current assets	6,390,629	8,424,159
Property and equipment, net	3,405,315	3,393,669
Operating lease right-of-use asset	2,790,885	0
Intangible assets, net	120,574	118,846
Other long-term assets	358,171	331,618
Goodwill	6,865,386	6,841,960	$ 6,610,279
Total assets	19,930,960	19,110,252
Current liabilities	5,706,944	3,647,402
Long-term operating lease liabilities	2,689,249	0
Long-term debt and other long-term liabilities	6,105,965	9,186,052
Noncontrolling interests subject to put provisions	1,185,733	1,124,641
Total DaVita Inc. shareholders’ equity	4,049,298	3,703,442
Noncontrolling interests not subject to put provisions	193,771	204,956
Total equity	4,243,069	3,908,398
Total liabilities and equity	19,930,960	$ 19,110,252
Physician Groups
Condensed Balance Sheet Statements Captions [Line Items]
Cash and cash equivalents	0
Restricted cash and equivalents	0
Accounts receivable, net	0
Other current assets	0
Total current assets	0
Property and equipment, net	0
Operating lease right-of-use asset	0
Intangible assets, net	0
Other long-term assets	0
Goodwill	0
Total assets	0
Current liabilities	0
Long-term operating lease liabilities	0
Long-term debt and other long-term liabilities	0
Noncontrolling interests subject to put provisions	0
Total DaVita Inc. shareholders’ equity	0
Noncontrolling interests not subject to put provisions	0
Total equity	0
Total liabilities and equity	0
Unrestricted Subsidiaries
Condensed Balance Sheet Statements Captions [Line Items]
Cash and cash equivalents	0
Restricted cash and equivalents	0
Accounts receivable, net	0
Other current assets	0
Total current assets	0
Property and equipment, net	0
Operating lease right-of-use asset	0
Intangible assets, net	0
Other long-term assets	0
Goodwill	0
Total assets	0
Current liabilities	0
Long-term operating lease liabilities	0
Long-term debt and other long-term liabilities	0
Noncontrolling interests subject to put provisions	0
Total DaVita Inc. shareholders’ equity	0
Noncontrolling interests not subject to put provisions	0
Total equity	0
Total liabilities and equity	0
Parent Company And Restricted Subsidiaries
Condensed Balance Sheet Statements Captions [Line Items]
Cash and cash equivalents	3,575,638
Restricted cash and equivalents	106,772
Accounts receivable, net	2,010,801
Other current assets	697,418
Total current assets	6,390,629
Property and equipment, net	3,405,315
Operating lease right-of-use asset	2,790,885
Intangible assets, net	120,574
Other long-term assets	358,171
Goodwill	6,865,386
Total assets	19,930,960
Current liabilities	5,706,944
Long-term operating lease liabilities	2,689,249
Long-term debt and other long-term liabilities	6,105,965
Noncontrolling interests subject to put provisions	1,185,733
Total DaVita Inc. shareholders’ equity	4,049,298
Noncontrolling interests not subject to put provisions	193,771
Total equity	4,243,069
Total liabilities and equity	$ 19,930,960