Other Financial Information (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Other Current Assets
Prepaid expenses	$ 278		$ 240
Materials and Supplies	97		105
Assets held for sale (See Note 1)	154
Deferred activation and installation charges current	46		25
Other	74		23
Total other current assets	649		393
Reclassification from other intangible assets, net to current assets other		154
Current liabilities
Accounts payable	1,320		1,400
Book overdraft balance	$ 248		$ 61

Represents the amount reclassified from goodwill and other assets to current assets - other.

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Current assets (normally turning over within one year or one business cycle if longer) that are held for sale apart from normal operations and anticipated to be sold within one year.

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Carrying value as of the balance sheet date of payments made in excess of existing cash balances, which will be honored by the bank but reflected as a loan to the entity. Overdrafts generally have a very short time frame for correction or repayment and are therefore more similar to short-term bank financing than trade financing.

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