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Supplemental Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Comprehensive Income Statement (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Condensed Statement of Income Captions [Line Items] |  |
Revenues | $ 12,517 | $ 11,423
Salaries and benefits | 5,647 | 5,289
Supplies | 2,041 | 1,915
Other operating expenses | 2,299 | 2,110
Equity in earnings of affiliates | (11) | (9)
Depreciation and amortization | 619 | 553
Interest expense (income) | 461 | 431
Losses (gains) on sales of facilities | 1 | (405)
Total expenses including equity in earnings of affiliates | 11,057 | 9,884
Income (loss) before income taxes | 1,460 | 1,539
Provision (benefit) for income taxes | 279 | 257
Net income (loss) | 1,181 | 1,282
Net income attributable to noncontrolling interests | 142 | 138
Net income (loss) attributable to HCA Healthcare, Inc. | 1,039 | 1,144
Comprehensive income (loss) attributable to HCA Healthcare, Inc. | 1,046 | 1,225
HCA Healthcare, Inc. Issuer [Member] |  |
Condensed Statement of Income Captions [Line Items] |  |
Other operating expenses | 2 | 1
Equity in earnings of affiliates | (1,026) | (1,090)
Interest expense (income) | 16 | 16
Total expenses including equity in earnings of affiliates | (1,008) | (1,073)
Income (loss) before income taxes | 1,008 | 1,073
Provision (benefit) for income taxes | (31) | (71)
Net income (loss) | 1,039 | 1,144
Net income (loss) attributable to HCA Healthcare, Inc. | 1,039 | 1,144
Comprehensive income (loss) attributable to HCA Healthcare, Inc. | 1,046 | 1,225
HCA Inc. Issuer [Member] |  |
Condensed Statement of Income Captions [Line Items] |  |
Interest expense (income) | 995 | 837
Total expenses including equity in earnings of affiliates | 995 | 837
Income (loss) before income taxes | (995) | (837)
Provision (benefit) for income taxes | (231) | (195)
Net income (loss) | (764) | (642)
Net income (loss) attributable to HCA Healthcare, Inc. | (764) | (642)
Comprehensive income (loss) attributable to HCA Healthcare, Inc. | (782) | (615)
Subsidiary Guarantors [Member] |  |
Condensed Statement of Income Captions [Line Items] |  |
Revenues | 7,224 | 6,776
Salaries and benefits | 3,137 | 3,069
Supplies | 1,177 | 1,141
Other operating expenses | 1,146 | 1,128
Equity in earnings of affiliates | (2) | (2)
Depreciation and amortization | 355 | 323
Interest expense (income) | (473) | (367)
Losses (gains) on sales of facilities | 1 | (395)
Management fees | (171) | (158)
Total expenses including equity in earnings of affiliates | 5,170 | 4,739
Income (loss) before income taxes | 2,054 | 2,037
Provision (benefit) for income taxes | 472 | 467
Net income (loss) | 1,582 | 1,570
Net income attributable to noncontrolling interests | 20 | 28
Net income (loss) attributable to HCA Healthcare, Inc. | 1,562 | 1,542
Comprehensive income (loss) attributable to HCA Healthcare, Inc. | 1,564 | 1,546
Subsidiary Non-Guarantors [Member] |  |
Condensed Statement of Income Captions [Line Items] |  |
Revenues | 5,293 | 4,647
Salaries and benefits | 2,510 | 2,220
Supplies | 864 | 774
Other operating expenses | 1,151 | 981
Equity in earnings of affiliates | (9) | (7)
Depreciation and amortization | 264 | 230
Interest expense (income) | (77) | (55)
Losses (gains) on sales of facilities |  | (10)
Management fees | 171 | 158
Total expenses including equity in earnings of affiliates | 4,874 | 4,291
Income (loss) before income taxes | 419 | 356
Provision (benefit) for income taxes | 69 | 56
Net income (loss) | 350 | 300
Net income attributable to noncontrolling interests | 122 | 110
Net income (loss) attributable to HCA Healthcare, Inc. | 228 | 190
Comprehensive income (loss) attributable to HCA Healthcare, Inc. | 251 | 240
Eliminations [Member] |  |
Condensed Statement of Income Captions [Line Items] |  |
Equity in earnings of affiliates | 1,026 | 1,090
Total expenses including equity in earnings of affiliates | 1,026 | 1,090
Income (loss) before income taxes | (1,026) | (1,090)
Net income (loss) | (1,026) | (1,090)
Net income (loss) attributable to HCA Healthcare, Inc. | (1,026) | (1,090)
Comprehensive income (loss) attributable to HCA Healthcare, Inc. | $ (1,033) | $ (1,171)

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