Products And Services Revenues (Summary Of Aggregate USF Surcharges Recognized) (Details) (USF Surcharge [Member], USD $) In Millions	3 Months Ended	6 Months Ended	3 Months Ended	9 Months Ended
Sep. 30, 2011 Successor [Member]	Sep. 30, 2011 Successor [Member]	Sep. 30, 2011 Predecessor [Member]	Sep. 30, 2010 Predecessor [Member]	Sep. 30, 2010 Predecessor [Member]
Taxes and surcharges included in operating revenues and expenses	$ 91	$ 183	$ 96	$ 91	$ 298

Revenues from the sale of other goods or rendering of other services, not elsewhere specified in the taxonomy; net of (reduced by) sales adjustments, returns, allowances, and discounts.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 1

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1(a),(d))

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Name:	us-gaap_OtherSalesRevenueNet
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration