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Business Combination- Discontinued Operations, Sale of Other Disposal Groups and Selected Financial Information by Geographic Operating Segment - Summary of Condensed Combined Information of the Statement of Operations of Discontinued Operations (Detail) - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of Discontinued Operations [line items] |  |  |
Sales | $ 1,549 | $ 8,979 | $ 11,888
Other products (expenses), net | 14 | (2) | 23
Net income | 3,499 | 768 | 1,028
Croatia [Member] |  |  |
Disclosure of Discontinued Operations [line items] |  |  |
Sales |  | 1,853 | 1,892
Cost of sales and operating expenses |  | (1,629) | (1,665)
Other products (expenses), net |  | (31) | 13
Financial expenses, net and others |  | (24) | (35)
Earnings before income tax |  | 169 | 205
Income tax |  | (29) | (43)
Net income |  | 140 | 162
Pacific Northwest Materials And Concrete Pipe Business [Member] | United States, Bangladesh, Thailand, Austria, and Hungary [member] |  |  |
Disclosure of Discontinued Operations [line items] |  |  |
Sales | 1,549 | 8,979 | 11,888
Cost of sales and operating expenses | (1,531) | (8,440) | (11,665)
Other products (expenses), net | 14 | (2) | 23
Financial expenses, net and others | (3) | (57) | 49
Earnings before income tax | 29 | 480 | 295
Income tax | 0 | (101) | 6
Net income | 29 | 379 | 301
Net income of non-controlling interest | 0 | 0 | (15)
Net income of controlling interest | $ 29 | $ 379 | $ 286

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