SCHEDULE I (Parent Company Information) CONDENSED BALANCE SHEET (Details) - USD ($) $ in Millions	Dec. 31, 2023	Nov. 22, 2023	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Other receivables — related-party	$ 4.1
Investments in consolidated subsidiaries, including intercompany balances	19,073.7
Other assets, net	17.6
Current liabilities:
Commitments and contingencies
Accumulated earnings	15,566.0
Accumulated other comprehensive earnings, net of taxes	2,170.3
Treasury shares, at cost			$ (0.1)
Liberty Global Plc
Current assets:
Cash and cash equivalents		$ 0.7	1.8	$ 1.7
Other current assets			7.5
Total current assets	4.1		99.9
Investments in consolidated subsidiaries, including intercompany balances			51,050.7
Other assets, net			16.8
Total assets	19,095.4		51,357.4
Current liabilities:
Accounts payable			1.1
Current portion of notes payable — related-party			12,590.2
Other accrued and current liabilities	11.3		25.0
Total current liabilities	11.9		12,695.4
Other long-term liabilities	20.9		24.7
Liabilities, Total	32.8		28,921.0
Commitments and contingencies
Additional paid-in capital	1,322.6		2,300.8
Accumulated earnings			19,617.7
Accumulated other comprehensive earnings, net of taxes			513.4
Treasury shares, at cost	(0.1)
Total shareholders’ equity	19,062.6		22,436.4
Total liabilities and shareholders’ equity	19,095.4		51,357.4
Liberty Global Plc | Related Party
Current assets:
Other receivables — related-party			89.8
Current notes receivable — related-party			0.8
Long-term notes receivable — related-party			190.0
Current liabilities:
Other payables — related-party			78.5
Other current liabilities — related-party	0.6		0.6
Long-term notes payable — related-party			16,200.9
Common Class A [Member] | Liberty Global Plc
Current liabilities:
Common stock	1.7		1.8
Common Class B [Member] | Liberty Global Plc
Current liabilities:
Common stock	0.1		0.1
Common Class C [Member] | Liberty Global Plc
Current liabilities:
Common stock	$ 2.0		$ 2.7