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Earnings per Share (Details) $ / shares in Units, shares in Thousands, $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2021 USD ($) shares | Dec. 31, 2021 MXN ($) $ / shares shares | Dec. 31, 2020 MXN ($) $ / shares shares | Dec. 31, 2019 MXN ($) $ / shares shares
Earnings per share [line items] |  |  |  |
Net controlling interest income allocated | $ 1,388 | $ 28,495 | $ (1,930) | $ 20,699
Series B shares. |  |  |  |
Earnings per share [line items] |  |  |  |
Weighted average number of shares for basic earnings per share | 9,242,880 | 9,242,880 | 9,243,590 | 9,244,160
Effect of dilution associated with non-vested shares for share based payment plans | 3,540 | 3,540 | 2,830 | 2,260
Weighted average number of shares adjusted for the effect of dilution (Shares outstanding) | 9,246,420 | 9,246,420 | 9,246,420 | 9,246,420
Dividend rights per series (see Note 23.1) | 100.00% | 100.00% | 100.00% | 100.00%
Weighted average number of shares further adjusted to reflect dividend rights | 9,246,420 | 9,246,420 | 9,246,420 | 9,246,420
Basic earnings per share | $ / shares |  | $ 1.42 | $ (0.10) | $ 1.03
Diluted earnings per share | $ / shares |  | $ 1.42 | $ (0.10) | $ 1.03
Allocation of earnings, weighted | 46.11% | 46.11% | 46.11% | 46.11%
Net controlling interest income allocated | $ |  | $ 13,139 | $ (890) | $ 9,545
Series D shares. |  |  |  |
Earnings per share [line items] |  |  |  |
Weighted average number of shares for basic earnings per share | 8,630,540 | 8,630,540 | 8,633,380 | 8,635,650
Effect of dilution associated with non-vested shares for share based payment plans | 14,170 | 14,170 | 11,330 | 9,060
Weighted average number of shares adjusted for the effect of dilution (Shares outstanding) | 8,644,710 | 8,644,710 | 8,644,710 | 8,644,710
Dividend rights per series (see Note 23.1) | 125.00% | 125.00% | 125.00% | 125.00%
Weighted average number of shares further adjusted to reflect dividend rights | 10,805,890 | 10,805,890 | 10,805,890 | 10,805,890
Basic earnings per share | $ / shares |  | $ 1.78 | $ (0.12) | $ 1.29
Diluted earnings per share | $ / shares |  | $ 1.78 | $ (0.12) | $ 1.29
Allocation of earnings, weighted | 53.89% | 53.89% | 53.89% | 53.89%
Net controlling interest income allocated | $ |  | $ 15,356 | $ (1,040) | $ 11,154

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