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Financial Risk Management - Summary of Company's Contractual Maturities for its Financial Liabilities, Including the Interest to be Paid (Detail) - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities $ 784,533 $ 693,099 $ 437,238
Fixed Rate Interest [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Weighted average of effective interest rate 9.85% 9.85% 9.85%
Variable rate interest [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Weighted average of effective interest rate 5.83% 4.73% 3.62%
Contractual maturities [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities $ 17,455,791 $ 12,385,582 $ 8,408,396
Contractual maturities [Member] | AMP [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 252,622 198,512 149,637
Contractual maturities [Member] | Trade accounts payable [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 784,533 693,099 437,238
Contractual maturities [Member] | Long-term debt securities (fixed rate) [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 1,500,000 1,500,000 1,500,000
Contractual maturities [Member] | Long-term debt securities (variable rate) [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 7,500,000 3,700,000 1,100,000
Contractual maturities [Member] | Variable rate bank loans [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 3,990,980 4,331,680 3,709,282
Contractual maturities [Member] | Fixed rate bank loans [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 261,278 282,596 241,183
Contractual maturities [Member] | Fixed Rate Interest [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 810,672 930,486 1,056,201
Contractual maturities [Member] | Variable rate interest [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 2,355,706 749,209 214,855
Less than 1 month [Member] | Contractual maturities [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 255,290 378,984 204,163
Less than 1 month [Member] | Contractual maturities [Member] | Trade accounts payable [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 200,056 358,587 196,757
Less than 1 month [Member] | Contractual maturities [Member] | Fixed rate bank loans [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 694 667 516
Less than 1 month [Member] | Contractual maturities [Member] | Fixed Rate Interest [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 232 3,104 1,405
Less than 1 month [Member] | Contractual maturities [Member] | Variable rate interest [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 54,308 16,626 5,485
From 1 to 3 months [Member] | Contractual maturities [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 837,825 381,300 3,541,455
From 1 to 3 months [Member] | Contractual maturities [Member] | Trade accounts payable [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 584,477 334,512 240,481
From 1 to 3 months [Member] | Contractual maturities [Member] | Variable rate bank loans [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 73,021   3,286,442
From 1 to 3 months [Member] | Contractual maturities [Member] | Fixed rate bank loans [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 1,403 2,027 1,569
From 1 to 3 months [Member] | Contractual maturities [Member] | Fixed Rate Interest [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 54,138 6,398 5,949
From 1 to 3 months [Member] | Contractual maturities [Member] | Variable rate interest [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 124,786 38,363 7,014
From 3 months to 1 year [Member] | Contractual maturities [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 894,557 552,647 561,076
From 3 months to 1 year [Member] | Contractual maturities [Member] | AMP [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 252,622 198,512 149,637
From 3 months to 1 year [Member] | Contractual maturities [Member] | Variable rate bank loans [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 59,688 76,457 38,715
From 3 months to 1 year [Member] | Contractual maturities [Member] | Fixed rate bank loans [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 6,548 5,608 201,860
From 3 months to 1 year [Member] | Contractual maturities [Member] | Fixed Rate Interest [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 55,470 109,563 128,836
From 3 months to 1 year [Member] | Contractual maturities [Member] | Variable rate interest [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 520,229 162,507 42,028
Between 1 and 5 years [Member] | Contractual maturities [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 13,473,761 8,960,283 2,087,007
Between 1 and 5 years [Member] | Contractual maturities [Member] | Long-term debt securities (variable rate) [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 7,500,000 3,700,000 1,100,000
Between 1 and 5 years [Member] | Contractual maturities [Member] | Variable rate bank loans [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 3,858,271 4,255,223 358,316
Between 1 and 5 years [Member] | Contractual maturities [Member] | Fixed rate bank loans [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 26,725 37,756 31,709
Between 1 and 5 years [Member] | Contractual maturities [Member] | Fixed Rate Interest [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 432,382 435,591 436,654
Between 1 and 5 years [Member] | Contractual maturities [Member] | Variable rate interest [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 1,656,383 531,713 160,328
More than 5 years [Member] | Contractual maturities [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 1,994,358 2,112,368 2,014,695
More than 5 years [Member] | Contractual maturities [Member] | Long-term debt securities (fixed rate) [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 1,500,000 1,500,000 1,500,000
More than 5 years [Member] | Contractual maturities [Member] | Variable rate bank loans [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities     25,809
More than 5 years [Member] | Contractual maturities [Member] | Fixed rate bank loans [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities 225,908 236,538 5,529
More than 5 years [Member] | Contractual maturities [Member] | Fixed Rate Interest [Member]      
Disclosure of detailed information about financial instruments [Line Items]      
Financial liabilities $ 268,450 $ 375,830 $ 483,357