Share-based Compensation (Awards Outstanding and Exercisable) (Details)	Mar. 31, 2025 $ / shares shares
Held by Liberty Global employees: | Options and SARs | Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	40,413,510
Options outstanding, weighted average exercise or base price (in dollars per shares) | $ / shares	$ 14.28
Options exercisable (in shares)	31,263,269
Options exercisable, weighted average exercise price or base price (in dollars per shares) | $ / shares	$ 15.46
Held by Liberty Global employees: | Options and SARs | Class C
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	90,290,703
Options outstanding, weighted average exercise or base price (in dollars per shares) | $ / shares	$ 14.38
Options exercisable (in shares)	73,130,473
Options exercisable, weighted average exercise price or base price (in dollars per shares) | $ / shares	$ 15.16
Held by Liberty Global employees: | RSUs | Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options outstanding (in shares)	4,402,005
Held by Liberty Global employees: | RSUs | Class C
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options outstanding (in shares)	6,263,136
Held by Liberty Global employees: | PSUs | Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options outstanding (in shares)	5,006,297
Held by Liberty Global employees: | PSUs | Class C
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options outstanding (in shares)	6,821,790
Held by former Liberty Global employees | Options and SARs | Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	3,192,113
Options outstanding, weighted average exercise or base price (in dollars per shares) | $ / shares	$ 16.35
Options exercisable (in shares)	2,741,048
Options exercisable, weighted average exercise price or base price (in dollars per shares) | $ / shares	$ 17.12
Held by former Liberty Global employees | Options and SARs | Class C
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	6,249,866
Options outstanding, weighted average exercise or base price (in dollars per shares) | $ / shares	$ 16.34
Options exercisable (in shares)	5,371,446
Options exercisable, weighted average exercise price or base price (in dollars per shares) | $ / shares	$ 17.00
Held by former Liberty Global employees | RSUs | Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options outstanding (in shares)	131,484
Held by former Liberty Global employees | RSUs | Class C
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options outstanding (in shares)	260,393
Held by former Liberty Global employees | PSUs | Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options outstanding (in shares)	4,281
Held by former Liberty Global employees | PSUs | Class C
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other than options outstanding (in shares)	4,241