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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
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