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Supplemental Condensed Consolidating Financial Information and Other Collateral-Related Information - Schedule of Condensed Consolidating Comprehensive Income Statement (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Condensed Statement of Income Captions [Line Items] |  |  |  |
Revenues before provision for doubtful accounts | $ 11,967 | $ 11,110 | $ 35,156 | $ 33,241
Provision for doubtful accounts | 1,271 | 840 | 3,104 | 2,392
Revenues | 10,696 | 10,270 | 32,052 | 30,849
Salaries and benefits | 5,081 | 4,740 | 14,878 | 14,133
Supplies | 1,777 | 1,699 | 5,369 | 5,131
Other operating expenses | 2,075 | 1,896 | 5,970 | 5,617
Equity in earnings of affiliates | (13) | (22) | (36) | (44)
Depreciation and amortization | 539 | 495 | 1,581 | 1,463
Interest expense | 427 | 432 | 1,257 | 1,275
Gains on sales of facilities | (7) | (3) | (10) | (8)
Losses on retirement of debt | 39 | 4 | 39 | 4
Legal claim costs |  | 11 |  | 33
Total expenses including equity in earnings of affiliates | 9,918 | 9,252 | 29,048 | 27,604
Income (loss) before income taxes | 778 | 1,018 | 3,004 | 3,245
Provision (benefit) for income taxes | 248 | 273 | 902 | 898
Net income (loss) | 530 | 745 | 2,102 | 2,347
Net income attributable to noncontrolling interests | 104 | 127 | 360 | 377
Net income (loss) attributable to HCA Healthcare, Inc. | 426 | 618 | 1,742 | 1,970
Comprehensive income (loss) attributable to HCA Healthcare, Inc. | 451 | 621 | 1,812 | 1,894
HCA Healthcare, Inc. Issuer [Member] |  |  |  |
Condensed Statement of Income Captions [Line Items] |  |  |  |
Other operating expenses |  | 1 | 5 | 5
Equity in earnings of affiliates | (436) | (573) | (1,702) | (1,843)
Interest expense | 16 | 16 | 48 | 48
Total expenses including equity in earnings of affiliates | (420) | (556) | (1,649) | (1,790)
Income (loss) before income taxes | 420 | 556 | 1,649 | 1,790
Provision (benefit) for income taxes | (6) | (62) | (93) | (180)
Net income (loss) | 426 | 618 | 1,742 | 1,970
Net income (loss) attributable to HCA Healthcare, Inc. | 426 | 618 | 1,742 | 1,970
Comprehensive income (loss) attributable to HCA Healthcare, Inc. | 451 | 621 | 1,812 | 1,894
HCA Inc. Issuer [Member] |  |  |  |
Condensed Statement of Income Captions [Line Items] |  |  |  |
Interest expense | 792 | 711 | 2,280 | 2,031
Losses on retirement of debt | 39 | 4 | 39 | 4
Legal claim costs |  | 11 |  | 33
Total expenses including equity in earnings of affiliates | 831 | 726 | 2,319 | 2,068
Income (loss) before income taxes | (831) | (726) | (2,319) | (2,068)
Provision (benefit) for income taxes | (307) | (268) | (856) | (763)
Net income (loss) | (524) | (458) | (1,463) | (1,305)
Net income (loss) attributable to HCA Healthcare, Inc. | (524) | (458) | (1,463) | (1,305)
Comprehensive income (loss) attributable to HCA Healthcare, Inc. | (522) | (432) | (1,458) | (1,288)
Subsidiary Guarantors [Member] |  |  |  |
Condensed Statement of Income Captions [Line Items] |  |  |  |
Revenues before provision for doubtful accounts | 5,897 | 5,591 | 17,799 | 16,957
Provision for doubtful accounts | 636 | 391 | 1,648 | 1,383
Revenues | 5,261 | 5,200 | 16,151 | 15,574
Salaries and benefits | 2,427 | 2,373 | 7,330 | 7,074
Supplies | 889 | 888 | 2,771 | 2,672
Other operating expenses | 963 | 904 | 2,841 | 2,654
Equity in earnings of affiliates | (1) | (1) | (3) | (4)
Depreciation and amortization | 249 | 242 | 748 | 707
Interest expense | (318) | (235) | (878) | (646)
Gains on sales of facilities | (4) |  | (5) |
Management fees | (215) | (206) | (637) | (601)
Total expenses including equity in earnings of affiliates | 3,990 | 3,965 | 12,167 | 11,856
Income (loss) before income taxes | 1,271 | 1,235 | 3,984 | 3,718
Provision (benefit) for income taxes | 460 | 447 | 1,443 | 1,347
Net income (loss) | 811 | 788 | 2,541 | 2,371
Net income attributable to noncontrolling interests | 24 | 24 | 74 | 67
Net income (loss) attributable to HCA Healthcare, Inc. | 787 | 764 | 2,467 | 2,304
Comprehensive income (loss) attributable to HCA Healthcare, Inc. | 790 | 766 | 2,476 | 2,312
Subsidiary Non-Guarantors [Member] |  |  |  |
Condensed Statement of Income Captions [Line Items] |  |  |  |
Revenues before provision for doubtful accounts | 6,070 | 5,519 | 17,357 | 16,284
Provision for doubtful accounts | 635 | 449 | 1,456 | 1,009
Revenues | 5,435 | 5,070 | 15,901 | 15,275
Salaries and benefits | 2,654 | 2,367 | 7,548 | 7,059
Supplies | 888 | 811 | 2,598 | 2,459
Other operating expenses | 1,112 | 991 | 3,124 | 2,958
Equity in earnings of affiliates | (12) | (21) | (33) | (40)
Depreciation and amortization | 290 | 253 | 833 | 756
Interest expense | (63) | (60) | (193) | (158)
Gains on sales of facilities | (3) | (3) | (5) | (8)
Management fees | 215 | 206 | 637 | 601
Total expenses including equity in earnings of affiliates | 5,081 | 4,544 | 14,509 | 13,627
Income (loss) before income taxes | 354 | 526 | 1,392 | 1,648
Provision (benefit) for income taxes | 101 | 156 | 408 | 494
Net income (loss) | 253 | 370 | 984 | 1,154
Net income attributable to noncontrolling interests | 80 | 103 | 286 | 310
Net income (loss) attributable to HCA Healthcare, Inc. | 173 | 267 | 698 | 844
Comprehensive income (loss) attributable to HCA Healthcare, Inc. | 193 | 242 | 754 | 743
Eliminations [Member] |  |  |  |
Condensed Statement of Income Captions [Line Items] |  |  |  |
Equity in earnings of affiliates | 436 | 573 | 1,702 | 1,843
Total expenses including equity in earnings of affiliates | 436 | 573 | 1,702 | 1,843
Income (loss) before income taxes | (436) | (573) | (1,702) | (1,843)
Net income (loss) | (436) | (573) | (1,702) | (1,843)
Net income (loss) attributable to HCA Healthcare, Inc. | (436) | (573) | (1,702) | (1,843)
Comprehensive income (loss) attributable to HCA Healthcare, Inc. | $ (461) | $ (576) | $ (1,772) | $ (1,767)

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