Investments (Equity Method Investments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ (2,019.3)	$ (1,267.8)	$ (175.4)
Revenue	7,491.4	7,195.7	10,311.3
Loss before income taxes	(3,724.2)	1,424.2	14,000.8
Net earnings (loss)	(3,873.8)	1,986.3	13,610.1
Current assets	5,641.6	6,297.4
Total assets	42,087.9	42,895.0
Current liabilities	4,332.8	3,921.0
Owners’ equity	19,007.4	22,573.4	25,598.0	$ 13,298.4
Total liabilities and equity	42,087.9	42,895.0
VMO2 JV
Schedule of Equity Method Investments [Line Items]
Revenue	13,574.1	12,857.2	8,522.9
Loss before income taxes	(3,728.8)	(3,012.8)	(351.6)
Net earnings (loss)	(3,438.6)	(3,042.0)	(173.2)
Current assets	5,237.8	4,056.0
Long-term assets	42,801.6	45,753.3
Total assets	48,039.4	49,809.3
Current liabilities	9,465.8	8,349.7
Long-term liabilities	24,075.9	21,877.6
Owners’ equity	14,497.7	19,582.0
Total liabilities and equity	48,039.4	49,809.3
VodafoneZiggo JV
Schedule of Equity Method Investments [Line Items]
Revenue	4,450.5	4,284.6	4,824.2
Loss before income taxes	(614.6)	608.3	(90.8)
Net earnings (loss)	(510.0)	394.7	(163.1)
Current assets	923.6	815.5
Long-term assets	18,790.5	19,396.4
Total assets	19,714.1	20,211.9
Current liabilities	2,727.5	2,719.2
Long-term liabilities	14,795.2	14,652.3
Owners’ equity	2,191.4	2,840.4
Total liabilities and equity	19,714.1	20,211.9
VMO2 JV
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ (1,723.1)	(1,396.6)	(97.2)
Percent of remaining results of operations included in investment	50.00%
Percent of share based compensation expense	100.00%
Other than temporary impairment losses, investments	$ 1,500.0	1,800.0
VodafoneZiggo JV
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ (196.7)	241.2	(32.0)
Percent of remaining results of operations included in investment	50.00%
Percent of interest income earned on loan included in investment	100.00%
nexfibre JV
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ (34.7)	25.2	0.0
AtlasEdge JV
Schedule of Equity Method Investments [Line Items]
Equity method investment	(31.1)	(23.3)	(5.8)
Formula E
Schedule of Equity Method Investments [Line Items]
Equity method investment	(19.4)	(20.2)	(2.5)
Streamz B.V. (Streamz)
Schedule of Equity Method Investments [Line Items]
Equity method investment	(6.9)	(35.2)	(0.7)
Other than temporary impairment losses, investments		31.7
All3Media
Schedule of Equity Method Investments [Line Items]
Equity method investment	4.0	(10.0)	(17.4)
Eltrona Interdiffusion S.A. (Eltrona)
Schedule of Equity Method Investments [Line Items]
Equity method investment	0.0	(34.2)	(17.2)
Other than temporary impairment losses, investments		32.5
Other
Schedule of Equity Method Investments [Line Items]
Equity method investment	$ (11.4)	$ (14.7)	$ (2.6)