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Equity (Details) $ in Millions, ₡ in Billions	3 Months Ended	12 Months Ended
Equity (Details) $ in Millions, ₡ in Billions	Mar. 31, 2026 USD ($)	Jan. 29, 2027 USD ($)	Jan. 29, 2027 CRC (₡)	Jan. 30, 2026	May 07, 2024 USD ($)
Class of Stock [Line Items]
Stock repurchased program, remaining authorized repurchase amount	$ 184.0
Liberty Costa Rica
Class of Stock [Line Items]
Ownership interest (as a percent)				8.50%
Liberty Costa Rica \| Payment One
Class of Stock [Line Items]
Payments to acquire equity method investments	53.0
Liberty Costa Rica \| Forecast \| Subsequent Event
Class of Stock [Line Items]
Payments to acquire equity method investments		$ 84.0
Liberty Costa Rica \| Forecast \| Subsequent Event \| Payment One
Class of Stock [Line Items]
Payments to acquire equity method investments		18.0	₡ 8
Liberty Costa Rica \| Forecast \| Subsequent Event \| Payment Two
Class of Stock [Line Items]
Payments to acquire equity method investments		$ 15.0
Common Class A And Common Class C
Class of Stock [Line Items]
Stock repurchased program authorized amount					$ 200.0
Common Class A
Class of Stock [Line Items]
Stock repurchased program authorized amount	0.8
Common Class C
Class of Stock [Line Items]
Stock repurchased program authorized amount	$ 1.2