Segment Reporting (Revenue by Major Category) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Principal Transaction Revenue [Line Items]
Revenue	$ 4,468.0	$ 4,276.5	$ 3,057.8	$ 2,671.9	$ 2,619.9	$ 2,430.2	$ 2,430.6	$ 2,450.1	$ 14,474.2	$ 9,930.8	$ 9,118.3
Video [Member]
Principal Transaction Revenue [Line Items]
Revenue									5,724.1	4,637.6	4,397.7
Broadband Internet [Member]
Principal Transaction Revenue [Line Items]
Revenue									3,536.6	2,407.0	2,203.4
Fixed-line telephony [Member]
Principal Transaction Revenue [Line Items]
Revenue									2,505.3	1,518.9	1,299.2
Cable Subscription [Member]
Principal Transaction Revenue [Line Items]
Revenue									11,766.0	8,563.5	7,900.3
SOHO Cable Subscription [Member]
Principal Transaction Revenue [Line Items]
Revenue									147.2	59.7	50.4
Mobile [Member]
Principal Transaction Revenue [Line Items]
Revenue									669.9	131.5	76.9
Mobile Interconnect [Member]
Principal Transaction Revenue [Line Items]
Revenue									175.2	35.1	13.4
Total Subscription [Member]
Principal Transaction Revenue [Line Items]
Revenue									12,435.9	8,695.0	7,977.2
Business to Business [Member]
Principal Transaction Revenue [Line Items]
Revenue									992.2	467.9	495.0
Other [Member]
Principal Transaction Revenue [Line Items]
Revenue									$ 1,046.1	$ 767.9	$ 646.1