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Earnings per Share - Summary of Basic and Diluted Earnings per Share (Detail) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 $ / shares	Dec. 31, 2023 MXN ($) $ / shares shares	Dec. 31, 2022 $ / shares	Dec. 31, 2022 MXN ($) $ / shares shares	Dec. 31, 2021 $ / shares	Dec. 31, 2021 MXN ($) $ / shares shares
Earnings per share [line items]
Consolidated net income		$ 20,226		$ 19,626		$ 16,331
Consolidated net income attributable to equity holders of the parent		$ 19,536		$ 19,034		$ 15,708
Weighted average number of shares for basic earnings per share (millions of shares) | shares		16,807		16,807		16,807
Earnings per share | (per share)	$ 1,160,000	$ 1.16	$ 1,130,000	$ 1.13	$ 930,000	$ 0.93
"A" shares
Earnings per share [line items]
Consolidated net income		$ 9,551		$ 9,268		$ 7,712
Consolidated net income attributable to equity holders of the parent		$ 9,225		$ 8,989		$ 7,418
Weighted average number of shares for basic earnings per share (millions of shares) | shares		7,937		7,937		7,937
"D" shares
Earnings per share [line items]
Consolidated net income		$ 5,618		$ 5,451		$ 4,536
Consolidated net income attributable to equity holders of the parent		$ 5,426		$ 5,287		$ 4,363
Weighted average number of shares for basic earnings per share (millions of shares) | shares		4,668		4,668		4,668
"B" shares
Earnings per share [line items]
Consolidated net income		$ 1,896		$ 1,840		$ 1,531
Consolidated net income attributable to equity holders of the parent		$ 1,831		$ 1,784		$ 1,473
Weighted average number of shares for basic earnings per share (millions of shares) | shares		1,576		1,576		1,576
"L" shares
Earnings per share [line items]
Consolidated net income		$ 3,161		$ 3,067		$ 2,552
Consolidated net income attributable to equity holders of the parent		$ 3,054		$ 2,974		$ 2,454
Weighted average number of shares for basic earnings per share (millions of shares) | shares		2,626		2,626		2,626

X

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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