Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Plant, Property and Equipment, Net - Components (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Plant, Property and Equipment, Net
Total property, plant and equipment	$ 2,731.2		$ 2,731.2		$ 2,643.9
Less accumulated depreciation	(1,907.3)		(1,907.3)		(1,812.7)
Plant, property and equipment, net	823.9		823.9		831.2
Depreciation expense	50.7	$ 52.5	102.7	$ 105.2
Net gains on sales of operating assets			1.3	$ 0.3
Distribution facilities
Plant, Property and Equipment, Net
Total property, plant and equipment	1,740.5		1,740.5		1,673.7
Head-end equipment
Plant, Property and Equipment, Net
Total property, plant and equipment	309.9		309.9		303.8
Customer premise equipment
Plant, Property and Equipment, Net
Total property, plant and equipment	267.4		267.4		269.1
Computer equipment and software
Plant, Property and Equipment, Net
Total property, plant and equipment	206.6		206.6		199.5
Telephony infrastructure
Plant, Property and Equipment, Net
Total property, plant and equipment	48.0		48.0		48.0
Buildings and leasehold improvements
Plant, Property and Equipment, Net
Total property, plant and equipment	34.9		34.9		34.3
Vehicles
Plant, Property and Equipment, Net
Total property, plant and equipment	31.9		31.9		29.4
Office and technical equipment
Plant, Property and Equipment, Net
Total property, plant and equipment	19.2		19.2		19.2
Land
Plant, Property and Equipment, Net
Total property, plant and equipment	4.7		4.7		4.7
Construction in progress (including material inventory and other)
Plant, Property and Equipment, Net
Total property, plant and equipment	$ 68.1		$ 68.1		$ 62.2