Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Oct. 31, 2023	Oct. 19, 2023
Class of Stock [Line Items]
Share repurchase program, minimum repurchase requirement, percentage		10.00%
Stock repurchase, remaining authorized amount	$ 506.3
Telenet | Subsidiaries | Liberty Global Belgium Holding B.V.
Class of Stock [Line Items]
Interest acquired			100.00%	100.00%
Class C
Class of Stock [Line Items]
Stock repurchased (in shares)	8,914,916
Average price paid per share (in dollars per share)	$ 19.12
Aggregate purchase price	$ 170.5
Stock repurchase, remaining authorized amount	29.3
Class A
Class of Stock [Line Items]
Stock repurchase, remaining authorized amount	$ 29.3