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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, 2024 MXN ($) $ / shares shares	Dec. 31, 2024 $ / shares	Dec. 31, 2023 MXN ($) $ / shares shares	Dec. 31, 2023 $ / shares	Dec. 31, 2022 MXN ($) $ / shares shares	Dec. 31, 2022 $ / shares
Earnings per share [line items]
Consolidated net income	$ 24,549		$ 20,226		$ 19,626
Consolidated net income attributable to equity holders of the parent	$ 23,729		$ 19,536		$ 19,034
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)	$ 1.41	$ 1.41	$ 1.16	$ 1.16	$ 1.13	$ 1.13
"A" shares
Earnings per share [line items]
Consolidated net income	$ 11,593		$ 9,551		$ 9,268
Consolidated net income attributable to equity holders of the parent	$ 11,205		$ 9,225		$ 8,989
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	$ 6,819		$ 5,618		$ 5,451
Consolidated net income attributable to equity holders of the parent	$ 6,591		$ 5,426		$ 5,287
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	$ 2,301		$ 1,896		$ 1,840
Consolidated net income attributable to equity holders of the parent	$ 2,225		$ 1,831		$ 1,784
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	$ 3,836		$ 3,161		$ 3,067
Consolidated net income attributable to equity holders of the parent	$ 3,708		$ 3,054		$ 2,974
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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