Summary of Significant Accounting Policies (Earnings or Loss per Share) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Earnings (loss) from continuing operations	$ 1,105.3	$ 13,527.5	$ (1,525.1)
Net earnings from continuing operations attributable to noncontrolling interests	(513.1)	(183.3)	(161.3)
Net earnings (loss) from continuing operations attributable to Liberty Global shareholders	$ 592.2	$ 13,344.2	$ (1,686.4)
Weighted average ordinary shares outstanding (basic EPS computation) (in shares)	489,555,582	555,695,224	602,083,910
Incremental shares attributable to the assumed exercise of outstanding options and SARs and the release of RSUs, RSAs and PSUs upon vesting (treasury stock method) (in shares)	7,433,268	13,418,999	0
Weighted average ordinary shares outstanding (diluted EPS computation) (in shares)	496,988,850	569,114,223	602,083,910