Segment Reporting (Reconciliation of Operating Cash Flow to Earnings from Continuing Operations) (Schedule) (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Jun. 01, 2021	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Earnings (loss) from continuing operations			$ (3,873.8)	$ 1,105.3	$ 13,527.5
Income tax expense			149.6	318.9	473.3
Other income, net			(225.5)	(134.4)	(44.9)
Gain on Telenet Tower Sale			0.0	(700.5)	0.0
Gain associated with the Telenet Wyre Transaction			(377.8)	0.0	0.0
Share of results of affiliates, net			2,019.3	1,267.8	175.4
Losses (gains) on debt extinguishment, net			1.4	(2.8)	90.6
Realized and unrealized losses (gains) due to changes in fair values of certain investments, net			557.3	323.5	(820.6)
Foreign currency transaction losses (gains), net			70.8	(1,407.2)	(1,324.5)
Realized and unrealized losses (gains) on derivative instruments, net			526.3	(1,213.1)	(537.3)
Interest expense			907.9	589.3	882.1
Operating income (loss)			(244.5)	146.8	1,320.3
Impairment, restructuring and other operating items, net			67.9	85.1	(19.0)
Depreciation and amortization			2,315.2	2,171.4	2,353.7
Share-based compensation expense			231.0	192.1	308.1
Adjusted EBITDA			2,369.6	2,595.4	3,963.1
AtlasEdge JV
Segment Reporting Information [Line Items]
Gain on transaction		$ (227.5)	0.0	0.0	(227.5)
Share of results of affiliates, net			31.1	23.3	5.8
U.K. JV Transaction
Segment Reporting Information [Line Items]
Gain on transaction	$ (10,873.8)		$ 0.0	$ 0.0	$ (10,873.8)