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Earnings or Loss Per Share - Potential Diluted Effect of Diluted Loss Per Share (Details) shares in Millions	1 Months Ended	6 Months Ended
	Jun. 30, 2026 $ / shares shares	Jun. 30, 2026 $ / shares shares	Jun. 30, 2025 shares
Outstanding options, SARs and RSUs (i)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded (in shares)		65.2	46.1
Outstanding options, SARs and RSUs (i) \| LILA Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded (in shares)	19.2
Conversion ratio	1.43
Weighted average exercise price (in dollars per share) \| $ / shares	$ 6.89	$ 6.89
Outstanding options, SARs and RSUs (i) \| LILAK Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded (in shares)	39.2
Weighted average exercise price (in dollars per share) \| $ / shares	$ 6.73	$ 6.73
Outstanding PSUs and PSARs (i)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded (in shares)		11.8	8.6
Outstanding PSUs and PSARs (i) \| LILA Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded (in shares)	3.9
Weighted average exercise price (in dollars per share) \| $ / shares	$ 9.69	$ 9.69
Outstanding PSUs and PSARs (i) \| LILAK Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded (in shares)	7.9
Conversion ratio	1.47
Weighted average exercise price (in dollars per share) \| $ / shares	$ 9.49	$ 9.49
LTVP and ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Securities excluded (in shares)		6.7	8.2