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Statements of Changes in Stockholders' Equity - MXN ($) $ in Millions | Total | Common stock [member] | Additional paid-in capital [member] | Other equity reserves [member] | Retained earnings [member] | Total controlling interest [Member] | Non-controlling interests and perpetual debentures [member]
--- | --- | --- | --- | --- | --- | --- | ---
Equity at beginning of period at Dec. 31, 2014 | $ 148,171 | $ 4,151 | $ 101,216 | $ 10,738 | $ 14,998 | $ 131,103 | $ 17,068
Net income | 2,124 | 0 | 0 | 0 | 1,201 | 1,201 | 923
Total other items of comprehensive income, net | 8,199 | 0 | 0 | 5,901 | 0 | 5,901 | 2,298
Effects of early conversion and issuance of convertible subordinated notes | 5,051 | 3 | 5,982 | (934) | 0 | 5,051 | 0
Capitalization of retained earnings | 0 | 4 | 7,613 | 0 | (7,617) | 0 | 0
Share-based compensation | 655 | 0 | 655 | 0 | 0 | 655 | 0
Effects of perpetual debentures | (432) | 0 | 0 | (432) | 0 | (432) | 0
Equity at end of period at Dec. 31, 2015 | 163,768 | 4,158 | 115,466 | 15,273 | 8,582 | 143,479 | 20,289
Net income | 15,206 | 0 | 0 | 0 | 14,033 | 14,033 | 1,173
Total other items of comprehensive income, net | 7,739 | 0 | 0 | 3,748 | 0 | 3,748 | 3,991
Capitalization of retained earnings | 0 | 4 | 6,966 | 0 | (6,970) | 0 | 0
Share-based compensation | 742 | 0 | 742 | 0 | 0 | 742 | 0
Effects of perpetual debentures | (507) | 0 | 0 | (507) | 0 | (507) | 0
Changes in non-controlling interest | 9,777 | 0 | 0 | 6,279 | 0 | 6,279 | 3,498
Equity at end of period at Dec. 31, 2016 | 196,725 | 4,162 | 123,174 | 24,793 | 15,645 | 167,774 | 28,951
Net income | 16,638 | 0 | 0 | 0 | 15,221 | 15,221 | 1,417
Total other items of comprehensive income, net | (9,009) | 0 | 0 | (9,520) | 0 | (9,520) | 511
Effects of early conversion and issuance of convertible subordinated notes | 5,729 | 4 | 7,059 | (1,334) | 0 | 5,729 | 0
Capitalization of retained earnings | 0 | 5 | 9,459 | 0 | (9,464) | 0 | 0
Share-based compensation | 817 | 0 | 791 | 26 | 0 | 817 | 0
Effects of perpetual debentures | (482) | 0 | 0 | (482) | 0 | (482) | 0
Equity at end of period at Dec. 31, 2017 | $ 210,418 | $ 4,171 | $ 140,483 | $ 13,483 | $ 21,402 | $ 179,539 | $ 30,879

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