Share-based Compensation (Awards Outstanding and Exercisable) (Details)	Sep. 30, 2023 $ / 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)	24,500,124
Options outstanding, weighted average exercise or base price (in dollars per shares) | $ / shares	$ 25.99
Options exercisable (in shares)	19,089,801
Options exercisable, weighted average exercise price or base price (in dollars per shares) | $ / shares	$ 27.04
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)	57,037,426
Options outstanding, weighted average exercise or base price (in dollars per shares) | $ / shares	$ 25.24
Options exercisable (in shares)	41,547,818
Options exercisable, weighted average exercise price or base price (in dollars per shares) | $ / shares	$ 26.11
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)	2,004,229
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)	4,564,394
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)	1,195,983
Options outstanding, weighted average exercise or base price (in dollars per shares) | $ / shares	$ 32.51
Options exercisable (in shares)	1,162,937
Options exercisable, weighted average exercise price or base price (in dollars per shares) | $ / shares	$ 32.77
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)	2,373,744
Options outstanding, weighted average exercise or base price (in dollars per shares) | $ / shares	$ 31.60
Options exercisable (in shares)	2,307,664
Options exercisable, weighted average exercise price or base price (in dollars per shares) | $ / shares	$ 31.83
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)	14,872
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)	29,729