Supplemental Financial Information (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Other liabilities
Checks Issued In Excess Of Associated Bank Balances But Not Yet Presented For Collection	$ 134		$ 117
Predecessor [Member]
Accounts and notes receivable, net
Trade			3,239
Unbilled trade and other			602
Less allowance for doubtful accounts			(183)
Accounts and Notes Receivable, Net			3,658
Prepaid expenses and other current assets
Prepaid expenses			370
Deferred charges and other			330
Prepaid Expense And Other Assets, Current			700
Accounts payable(1)
Trade			2,521	[1]
Accrued interconnection costs			393	[1]
Construction obligations and other			573	[1]
Accounts Payable, Current			3,487	[1]
Accrued expenses and other current liabilities
Deferred revenues			1,540
Accrued taxes			303
Payroll and related			512
Accrued interest			328
Accrued capital expenditures, non-current			939
Other			1,386
Accrued expenses and other current liabilites			5,008
Other liabilities
Deferred rental income-communications towers			700
Deferred rent			1,431
Accrued taxes-unrecognized tax benefits			609
Deferred revenue			0
Post-retirement benefits and other non-current employee related liabilities			1,141
Other			719
Other Liabilities, Noncurrent			4,600
Successor [Member]
Accounts and notes receivable, net
Trade	3,495	[2]
Unbilled trade and other	231	[2]
Less allowance for doubtful accounts	(156)	[2]
Accounts and Notes Receivable, Net	3,570	[2]
Prepaid expenses and other current assets
Prepaid expenses	480	[2]
Deferred charges and other	148	[2]
Prepaid Expense And Other Assets, Current	628	[2]	0
Accounts payable(1)
Trade	2,475	[1],[2]
Accrued interconnection costs	386	[1],[2]
Construction obligations and other	451	[1],[2]
Accounts Payable, Current	3,312	[1],[2]	0
Accrued expenses and other current liabilities
Deferred revenues	1,339	[2]
Accrued taxes	291	[2]
Payroll and related	591	[2]
Accrued interest	491	[2]
Accrued capital expenditures, non-current	1,438	[2]
Other	2,213	[2]
Accrued expenses and other current liabilites	6,363	[2]	4
Other liabilities
Deferred rental income-communications towers	242	[2]
Deferred rent	121	[2]
Accrued taxes-unrecognized tax benefits	688	[2]
Deferred revenue	1,122	[2]
Post-retirement benefits and other non-current employee related liabilities	538	[2]
Other	887	[2]
Other Liabilities, Noncurrent	$ 3,598	[2]	$ 0

[1] Includes liabilities in the amounts of $134 million and $117 million as of the Successor year ended December 31, 2013 and Predecessor year ended December 31, 2012, respectively, for checks issued in excess of associated bank balances but not yet presented for collection.

[2] Successor balances at December 31, 2012 primarily consisted of interest receivable and accrued taxes and were insignificant, therefore, they are excluded from the table.