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Summary of Group's Segment Operating Results (Detail) ¥ in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2017 CNY (¥) | Dec. 31, 2016 CNY (¥) | Dec. 31, 2015 CNY (¥)
Revenues: |  |  |  |
Online marketing services | $ 11,242 | ¥ 73,146 | ¥ 64,525 | ¥ 64,037
Other services | 1,792 | 11,663 | 6,024 | 2,345
Total revenues | 13,034 | 84,809 | 70,549 | 66,382
Operating costs and expenses: |  |  |  |
Cost of revenues | (6,619) | (43,062) | (35,278) | (27,458)
Selling, general and administrative | (2,018) | (13,128) | (15,071) | (17,076)
Research and development | (1,987) | (12,928) | (10,151) | (10,176)
Total operating costs and expenses | (10,624) | (69,118) | (60,500) | (54,710)
Operating profit (loss) | 2,410 | 15,691 | 10,049 | 11,672
Other income: |  |  |  |
Interest income | 485 | 3,154 | 2,342 | 2,362
Interest expense | (248) | (1,615) | (1,158) | (1,041)
Foreign exchange (loss) income, net | (74) | (482) | 508 | 182
Income (loss) from equity method investments | (10) | (63) | (1,026) | 4
Other income (loss), net | 707 | 4,598 | 3,794 | 24,728
Total other income (loss), net | 860 | 5,592 | 4,460 | 26,235
Income (loss) before income taxes | 3,270 | 21,283 | 14,509 | 37,907
Income taxes | (460) | (2,995) | (2,913) | (5,475)
Net income (loss) | 2,810 | 18,288 | 11,596 | 32,432
Operating Segments | Baidu Core |  |  |  |
Revenues: |  |  |  |
Online marketing services | 9,818 | 63,880 | 57,944 | 60,312
Other services | 584 | 3,801 | 1,526 | 917
Total revenues | 10,402 | 67,681 | 59,470 | 61,229
Operating costs and expenses: |  |  |  |
Cost of revenues | (3,949) | (25,688) | (23,806) | (21,591)
Selling, general and administrative | (1,627) | (10,586) | (13,493) | (15,917)
Research and development | (1,797) | (11,692) | (9,298) | (9,671)
Total operating costs and expenses | (7,373) | (47,966) | (46,597) | (47,179)
Operating profit (loss) | 3,029 | 19,715 | 12,873 | 14,050
Other income: |  |  |  |
Interest income | 497 | 3,231 | 2,426 | 2,413
Interest expense | (230) | (1,497) | (1,149) | (1,041)
Foreign exchange (loss) income, net | (136) | (883) | 747 | 238
Income (loss) from equity method investments | (10) | (63) | (1,026) | 5
Other income (loss), net | 707 | 4,597 | 3,732 | 24,736
Total other income (loss), net | 828 | 5,385 | 4,730 | 26,351
Income (loss) before income taxes | 3,857 | 25,100 | 17,603 | 40,401
Income taxes | (461) | (3,001) | (2,915) | (5,523)
Net income (loss) | 3,396 | 22,099 | 14,688 | 34,878
Operating Segments | iQIYI |  |  |  |
Revenues: |  |  |  |
Online marketing services | 1,254 | 8,159 | 5,650 | 3,400
Other services | 1,417 | 9,219 | 5,587 | 1,919
Total revenues | 2,671 | 17,378 | 11,237 | 5,319
Operating costs and expenses: |  |  |  |
Cost of revenues | (2,672) | (17,386) | (11,437) | (6,042)
Selling, general and administrative | (411) | (2,675) | (1,766) | (1,204)
Research and development | (195) | (1,270) | (824) | (500)
Total operating costs and expenses | (3,278) | (21,331) | (14,027) | (7,746)
Operating profit (loss) | (607) | (3,953) | (2,790) | (2,427)
Other income: |  |  |  |
Interest income | 13 | 83 | 17 | 5
Interest expense | (43) | (278) | (110) | (55)
Foreign exchange (loss) income, net | 62 | 401 | (239) | (77)
Income (loss) from equity method investments | 0 | 0 | 0 | (1)
Other income (loss), net | 0 | 2 | 61 | (8)
Total other income (loss), net | 32 | 208 | (271) | (136)
Income (loss) before income taxes | (575) | (3,745) | (3,061) | (2,563)
Income taxes | 1 | 8 | (13) | (11)
Net income (loss) | (574) | (3,737) | (3,074) | (2,574)
Intersegment Eliminations & Adjustments |  |  |  |
Revenues: |  |  |  |
Online marketing services | 170 | 1,107 | 931 | 325
Other services | (209) | (1,357) | (1,089) | (491)
Total revenues | (39) | (250) | (158) | (166)
Operating costs and expenses: |  |  |  |
Cost of revenues | 2 | 12 | (35) | 175
Selling, general and administrative | 20 | 133 | 188 | 45
Research and development | 5 | 34 | (29) | (5)
Total operating costs and expenses | 27 | 179 | 124 | 215
Operating profit (loss) | (12) | (71) | (34) | 49
Other income: |  |  |  |
Interest income | (25) | (160) | (101) | (56)
Interest expense | 25 | 160 | 101 | 55
Foreign exchange (loss) income, net | 0 | 0 | 0 | 21
Income (loss) from equity method investments | 0 | 0 | 0 | 0
Other income (loss), net | 0 | (1) | 1 | 0
Total other income (loss), net | 0 | (1) | 1 | 20
Income (loss) before income taxes | (12) | (72) | (33) | 69
Income taxes | 0 | (2) | 15 | 59
Net income (loss) | $ (12) | ¥ (74) | ¥ (18) | ¥ 128

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