v3.26.1
Consolidated Statements of Changes in Equity - Parenthetical - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Changes in equity [abstract]        
Number of shares authorised (in shares) 3,500,000,000 3,500,000,000 3,500,000,000 3,500,000,000
Par value per share (in dollars per share) $ 1.00 $ 1.00 $ 1.00 $ 1.00
Number of shares issued (in shares) 2,004,743,442 2,004,743,442 2,004,743,442 2,004,743,442
Legal reserve $ 200.5 $ 200.5 $ 200.5 $ 200.5
Undistributable reserve 1,400.0 1,400.0 1,400.0 1,400.0
Other reserves, acquisition of noncontrolling interest in subsidiaries (72.4) $ (72.4) $ (72.4) $ (72.4)
Dividends paid, per share (in dollars per share)   $ 0.27 $ 0.31 $ 0.29
Dividends paid, USD per ADS (in dollars per american depository share)   $ 2.70 $ 3.10 $ 2.90
Dividends not paid on Treasury Shares   $ 11.2 $ 12.9 $ 12.1
Tenigal S. de R.L. de C.V.        
Changes in equity [abstract]        
Repayment of additional paid in capital, next three years $ 63.0      
Treasury shares        
Changes in equity [abstract]        
Number of shares in entity held by entity or by its subsidiaries or associates (in shares) 41,666,666 41,666,666 41,666,666 41,666,666