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Property, Machinery and Equipment, Net - Disclosure of Net Change in Property, Machinery and Equipment (Detail) - MXN ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | $ 230,134 | $ 216,694 | $ 205,542
Capital expenditures | 9,514 | 12,676 | 11,454
Additions through capital leases | 2,096 | 7 | 63
Capitalization of financial expense |  | 175 | 73
Stripping costs | 809 | 421 | 723
Total capital expenditures | 12,419 | 13,279 | 12,313
Disposals | (1,844) | (1,841) | (2,247)
Reclassifications | (1,634) | (4,549) | (3,099)
Business combinations | 6,492 | 0 | 4,004
Depreciation and depletion for the period | (13,955) | (14,041) | (13,086)
Impairment losses | (984) | (1,899) | (1,145)
Foreign currency translation effects | 1,532 | 22,491 | 14,412
Net book value at end of period | 232,160 | 230,134 | 216,694
Cost [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | 395,922 | 360,089 | 324,210
Net book value at end of period | 411,515 | 395,922 | 360,089
Accumulated depreciation and depletion [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | (165,788) | (143,395) | (118,668)
Net book value at end of period | (179,355) | (165,788) | (143,395)
Land and mineral reserves [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | 80,917 | 74,226 |
Capital expenditures | 547 | 2,149 |
Additions through capital leases | 0 | 0 |
Capitalization of financial expense |  | 0 |
Stripping costs | 809 | 421 |
Total capital expenditures | 1,356 | 2,570 |
Disposals | (347) | (388) |
Reclassifications | (784) | (2,029) |
Business combinations | 2,179 | 0 |
Depreciation and depletion for the period | (2,571) | (2,426) |
Impairment losses | (202) | (671) |
Foreign currency translation effects | (1,895) | 9,635 |
Net book value at end of period | 78,653 | 80,917 | 74,226
Land and mineral reserves [member] | Cost [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | 97,218 | 86,441 |
Net book value at end of period | 95,495 | 97,218 | 86,441
Land and mineral reserves [member] | Accumulated depreciation and depletion [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | (16,301) | (12,215) |
Net book value at end of period | (16,842) | (16,301) | (12,215)
Building [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | 27,516 | 27,335 |
Capital expenditures | 802 | 1,856 |
Additions through capital leases | 0 | 0 |
Capitalization of financial expense |  | 0 |
Stripping costs | 0 | 0 |
Total capital expenditures | 802 | 1,856 |
Disposals | (223) | (141) |
Reclassifications | (82) | (703) |
Business combinations | 749 | 0 |
Depreciation and depletion for the period | (1,967) | (2,033) |
Impairment losses | (1) | (303) |
Foreign currency translation effects | 908 | 1,505 |
Net book value at end of period | 27,702 | 27,516 | 27,335
Building [member] | Cost [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | 51,740 | 48,563 |
Net book value at end of period | 53,927 | 51,740 | 48,563
Building [member] | Accumulated depreciation and depletion [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | (24,224) | (21,228) |
Net book value at end of period | (26,225) | (24,224) | (21,228)
Machinery and equipment [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | 104,454 | 101,280 |
Capital expenditures | 8,165 | 8,671 |
Additions through capital leases | 2,096 | 7 |
Capitalization of financial expense |  | 0 |
Stripping costs | 0 | 0 |
Total capital expenditures | 10,261 | 8,678 |
Disposals | (1,274) | (1,268) |
Reclassifications | (768) | (1,731) |
Business combinations | 3,136 | 0 |
Depreciation and depletion for the period | (9,417) | (9,582) |
Impairment losses | (763) | (547) |
Foreign currency translation effects | 719 | 7,624 |
Net book value at end of period | 106,348 | 104,454 | 101,280
Machinery and equipment [member] | Cost [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | 229,717 | 211,232 |
Net book value at end of period | 242,636 | 229,717 | 211,232
Machinery and equipment [member] | Accumulated depreciation and depletion [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | (125,263) | (109,952) |
Net book value at end of period | (136,288) | (125,263) | (109,952)
Construction in progress [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | 17,247 | 13,853 |
Capital expenditures | 0 | 0 |
Additions through capital leases | 0 | 0 |
Capitalization of financial expense |  | 175 |
Stripping costs | 0 | 0 |
Total capital expenditures | 0 | 175 |
Disposals | 0 | (44) |
Reclassifications | 0 | (86) |
Business combinations | 428 | 0 |
Depreciation and depletion for the period | 0 | 0 |
Impairment losses | (18) | (378) |
Foreign currency translation effects | 1,800 | 3,727 |
Net book value at end of period | 19,457 | 17,247 | 13,853
Construction in progress [member] | Cost [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | 17,247 | 13,853 |
Net book value at end of period | 19,457 | 17,247 | 13,853
Construction in progress [member] | Accumulated depreciation and depletion [member] |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |
Net book value at beginning of period | 0 | 0 |
Net book value at end of period | $ 0 | $ 0 | $ 0

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