Acquisitions (Pro Forma Information) (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares
Business Combination and Asset Acquisition [Abstract]
Revenue (in millions) | $	$ 13,206.8
Net loss from continuing operations attributable to Liberty Global shareholders (in millions) | $	$ (1,902.3)
Basic earnings (loss) (attributable to Liberty Global shareholders per share (in dollars per share) | $ / shares	$ (3.16)
Diluted earnings (loss) (attributable to Liberty Global shareholders per share (in dollars per share) | $ / shares	$ (3.16)