Goodwill And Other Intangibles (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 328,000,000	$ 422,200,000	$ 521,700,000
Estimated future amortization expense, year 1	285,000,000
Estimated future amortization expense, year 2	240,000,000
Estimated future amortization expense, year 3	195,000,000
Estimated future amortization expense, year 4	150,000,000
Estimated future amortization expense, year 5	105,000,000
Frontier Legacy Properties [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense		11,400,000	56,300,000
Customer Base [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	328,000,000	410,800,000	465,400,000
Customer Base [Member] | Residential Customer List [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	9 years
Customer Base [Member] | Business Customer List [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	12 years
Software Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense		$ 38,300,000	$ 49,100,000