Commitments and Contingencies (Narrative) (Details) (USD $)	0 Months Ended	6 Months Ended		12 Months Ended			6 Months Ended	12 Months Ended
	Apr. 19, 2012	Dec. 31, 2013	Jul. 10, 2013	Dec. 31, 2013 renewal_option	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Successor [Member]	Dec. 31, 2013 Successor [Member]	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Maximum [Member]
Commitments and Contingencies [Line Items]
Noncancelable Portion Of Leases Range Maximum				15 years
Number of Operating Lease Renewals Available				1
Operating Lease, Maximum Contract Length To Become Eligible For Renewal Contract, Term				10 years
General initial term of operating lease, minimum				5 years
General initial term of operating lease, maximum				12 years
Number of Cell Site Renewal Options Available				5.0
Years for each renewal option for cell site leases				5 years
Sales receipts alleged to not be reported, amount	$ 100,000,000
Business Combination, Acquisition Related Costs								100,000,000
Minimum spectrum reconfiguration obligations		2,800,000,000		2,800,000,000
Letter of Credit, Minimum		850,000,000		850,000,000
Operating Leases, Rent Expense, Net		1,300,000,000	1,000,000,000		2,000,000,000	1,900,000,000
Total Payments directly attributable to performance under Report and Order		3,300,000,000		3,300,000,000
Maximum Length Of Spectrum Lease Agreements		30 years		30 years
Weighted Average Length of Spectrum Lease Agreement		23 years		23 years
Payment to Satisfy Other Spectrum Commitments							1,000,000
Maximum Remaining Commitments of Other Spectrum Commitments		$ 100,300,000		$ 100,300,000
Remaining Other Spectrum Commitments Expected to Be Incurred Over Term									15 years	30 years