Equity Method Investment, Co-Venturer Ownership Percentage

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Equity Method Investment, Leverage Ratio

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Equity Method Investment, Term to Distribute All Unrestricted Cash

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Payments of Value-Added Taxes, Joint Venture

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Percent of Interest Income Earned on Loan Included in Income (Loss) from Equity Method Investments

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Percent of Remaining Results of Operations Included in Income (Loss) from Equity Method Investments

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For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

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Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The increase (decrease) during the reporting period in the amount due from borrowers for interest payments.

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Balance held at close of period in number of shares.

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Percent of net assets at close of period. For schedules of investments that are categorized, each category has a percent of net assets for the aggregated value of the Investments in the category.

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The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities.

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Yield on the receivable, on which interest has been imputed, as calculated from its issuance value or purchase price. The calculated effective interest rate considers factors such as the issued face value or price paid for the receivable, the time period between payments, and the time until maturity [full receipt] of the receivable.

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The principal amount of the receivable or note before consideration of the discount or premium.

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The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates.

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Investments (Narrative) (Details) € in Millions, $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2019 USD ($) shares	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) shares	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2019 USD ($) shares	Dec. 31, 2019 EUR (€)	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($)	Oct. 31, 2019	Dec. 31, 2016
Schedule of Investments [Line Items]
Value-added taxes (VAT) paid on behalf of the VodafoneZiggo JV										$ 0.0		$ 0.0	$ 162.6
Distributions received from affiliates										0.0		0.0	1,569.4
Revenue	$ 2,982.2	$ 2,840.9	$ 2,850.4	$ 2,868.0	$ 2,949.1	$ 2,929.7	$ 3,015.6	$ 3,063.5		$ 11,541.5		11,957.9	$ 11,276.4
VodafoneZiggo JV
Schedule of Investments [Line Items]
Percent of interest income earned on loan included in investment	100.00%									100.00%
Percent of remaining results of operations included in investment	50.00%									50.00%
Co-venturer ownership percentage	50.00%									50.00%					50.00%
Ownership percentage	50.00%									50.00%			50.00%		50.00%
Term to distribute all unrestricted cash										2 months	2 months
Value-added taxes (VAT) paid on behalf of the VodafoneZiggo JV									$ 162.6
Distributions received from affiliates										$ 162.7		232.5	$ 252.8
Revenue										$ 4,407.8		4,602.2	4,512.5
VodafoneZiggo JV \| Minimum
Schedule of Investments [Line Items]
Leverage ratio	4.5									4.5
VodafoneZiggo JV \| Maximum
Schedule of Investments [Line Items]
Leverage ratio	5.0									5.0
VodafoneZiggo JV \| Equity Method Investee
Schedule of Investments [Line Items]
Payments to acquire										$ 14.4		13.1	144.7
Due from related parties	$ 19.3				24.4					19.3		24.4
VodafoneZiggo JV \| VodafoneZiggo JV Loan
Schedule of Investments [Line Items]
Excess of carrying amount over proportional share in investees net assets	1,041.0				1,016.9					1,041.0		1,016.9
Related party note receivable	$ 786.1				$ 916.1					$ 786.1		916.1
Related party note receivable rate										5.55%	5.55%
Repayments of related-party debt										$ 112.1	€ 100.0	114.5	118.5
Interest accrued										50.4
JV Services
Schedule of Investments [Line Items]
Revenue										$ 189.1		$ 189.1	$ 132.4
ITV
Schedule of Investments [Line Items]
Number of common stock shares owned (in shares) \| shares	398,515,510				398,515,510					398,515,510		398,515,510
Percent of investment owned (less than 5% for Sumitomo and Lionsgate)			10.00%
ITI Neovision S.A. (ITI Neovision)
Schedule of Investments [Line Items]
Percent of investment owned (less than 5% for Sumitomo and Lionsgate)	17.00%				17.00%					17.00%		17.00%
Lionsgate
Schedule of Investments [Line Items]
Percent of investment owned (less than 5% for Sumitomo and Lionsgate)	5.00%									5.00%
Lionsgate \| Common Stock
Schedule of Investments [Line Items]
Number of common stock shares owned (in shares) \| shares	4,000,000.0				2,500,000					4,000,000.0		2,500,000
Lionsgate \| Nonvoting Common Stock
Schedule of Investments [Line Items]
Number of common stock shares owned (in shares) \| shares	2,500,000									2,500,000
Casa Systems, Inc. (Casa)
Schedule of Investments [Line Items]
Number of common stock shares owned (in shares) \| shares	787,074				3,005,307					787,074		3,005,307
Percent of investment owned (less than 5% for Sumitomo and Lionsgate)														1.00%