v3.10.0.1

Acquisitions and Dispositions (Pending and Completed Dispositions Narrative) (Details) € in Millions	Jul. 31, 2018 EUR (€)	Jul. 31, 2018 USD ($)	May 09, 2018 EUR (€)	Dec. 29, 2017 USD ($)	Jul. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	May 09, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Authorized amount						$ 500,000,000.0
Vodafone Disposal Group | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration for disposal			€ 10,600.0				$ 12,400,000,000
Compensatory payment			€ 250.0				$ 291,900,000
Term of transitional services			4 years
UPC Austria | Discontinued Operations, Disposed of by Sale | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration for disposal	€ 1,900.0				$ 2,200,000,000
Proceeds from divestiture of business	€ 1,800.0	$ 2,100,000,000
Extinguishment of debt		$ 1,500,000,000
Term of transitional services	4 years	4 years
Term of brand transitional period	3 years	3 years
UPC Austria | Discontinued Operations, Disposed of by Sale | UPC Holding Bank Facility | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Extinguishment of debt		$ 913,800,000
UPC Austria | Discontinued Operations, Disposed of by Sale | UPCB SPE Notes | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Extinguishment of debt		70,100,000
UPC Austria | Discontinued Operations, Disposed of by Sale | VM Notes | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Extinguishment of debt		$ 519,900,000
LiLAC Group | Discontinued Operations, Split-off Transaction
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Common shares distributed				100.00%
Gain (loss) on discontinued operation				$ 0

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