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Summary of Group's Operating Segment Results (Detail) ¥ in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 CNY (¥) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 CNY (¥) | Dec. 31, 2017 CNY (¥)
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  |  |  | ¥ 84,809
Total revenues | ¥ 107,413 | $ 15,429 | ¥ 102,277 |
Operating costs and expenses: |  |  |  |
Cost of revenues | 62,850 | 9,028 | 51,744 | 43,062
Selling, general and administrative | 19,910 | 2,860 | 19,231 | 13,128
Research and development | 18,346 | 2,635 | 15,772 | 12,928
Total operating costs and expenses | 101,106 | 14,523 | 86,747 | 69,118
Operating profit (loss) | 6,307 | 906 | 15,530 | 15,691
Total other income (loss), net | (6,647) | (955) | 11,795 | 5,592
Income (loss) before income taxes | (340) | (49) | 27,325 | 21,283
Income taxes | 1,948 | 279 | 4,743 | 2,995
Net income (loss) | (2,288) | (328) | 22,582 | 18,288
Less: net (loss) income attributable to noncontrolling interests | (4,345) | (624) | (4,991) | (13)
Net income (loss) attributable to Baidu, Inc. | 2,057 | 296 | 27,573 | 18,301
Operating Segments | Baidu Core |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  |  |  | 67,681
Total revenues | 79,711 | 11,450 | 78,271 |
Operating costs and expenses: |  |  |  |
Cost of revenues | 34,019 | 4,887 | 25,370 | 25,688
Selling, general and administrative | 14,733 | 2,116 | 15,310 | 10,586
Research and development | 15,698 | 2,255 | 13,783 | 11,692
Total operating costs and expenses | 64,450 | 9,258 | 54,463 | 47,966
Operating profit (loss) | 15,261 | 2,192 | 23,808 | 19,715
Total other income (loss), net | (5,680) | (816) | 13,169 | 5,385
Income (loss) before income taxes | 9,581 | 1,376 | 36,977 | 25,100
Income taxes | 1,896 | 272 | 4,664 | 3,001
Net income (loss) | 7,685 | 1,104 | 32,313 | 22,099
Less: net (loss) income attributable to noncontrolling interests | 105 | 15 | (1,292) | (9)
Net income (loss) attributable to Baidu, Inc. | 7,580 | 1,089 | 33,605 | 22,108
Operating Segments | iQIYI |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  |  |  | 17,378
Total revenues | 28,994 | 4,165 | 24,989 |
Operating costs and expenses: |  |  |  |
Cost of revenues | 30,348 | 4,359 | 27,133 | 17,386
Selling, general and administrative | 5,237 | 753 | 4,168 | 2,675
Research and development | 2,667 | 383 | 1,994 | 1,270
Total operating costs and expenses | 38,252 | 5,495 | 33,295 | 21,331
Operating profit (loss) | (9,258) | (1,330) | (8,306) | (3,953)
Total other income (loss), net | (967) | (139) | (676) | 208
Income (loss) before income taxes | (10,225) | (1,469) | (8,982) | (3,745)
Income taxes | 52 | 7 | 79 | (8)
Net income (loss) | (10,277) | (1,476) | (9,061) | (3,737)
Less: net (loss) income attributable to noncontrolling interests | 46 | 7 | 49 |
Net income (loss) attributable to Baidu, Inc. | (10,323) | (1,483) | (9,110) | (3,737)
Intersegment Eliminations & Adjustments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total revenues |  |  |  | (250)
Total revenues | (1,292) | (186) | (983) |
Operating costs and expenses: |  |  |  |
Cost of revenues | (1,517) | (218) | (759) | (12)
Selling, general and administrative | (60) | (9) | (247) | (133)
Research and development | (19) | (3) | (5) | (34)
Total operating costs and expenses | (1,596) | (230) | (1,011) | (179)
Operating profit (loss) | 304 | 44 | 28 | (71)
Total other income (loss), net |  |  | (698) | (1)
Income (loss) before income taxes | 304 | 44 | (670) | (72)
Income taxes |  |  |  | 2
Net income (loss) | 304 | 44 | (670) | (74)
Less: net (loss) income attributable to noncontrolling interests | (4,496) | (646) | (3,748) | (4)
Net income (loss) attributable to Baidu, Inc. | ¥ 4,800 | $ 690 | ¥ 3,078 | ¥ (70)

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