Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments.

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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Severance and Leased Real Estate (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended					6 Months Ended
	Jun. 30, 2012 Severance	Mar. 31, 2012 Severance	Jun. 30, 2012 Acquisition of Qwest Leased real estate	Mar. 31, 2012 Acquisition of Qwest Leased real estate	Dec. 31, 2011 Acquisition of Qwest Leased real estate	Jun. 30, 2012 Acquisition of Qwest Ceased-use leased real estate accrual Leased real estate Minimum Y	Jun. 30, 2012 Acquisition of Qwest Ceased-use leased real estate accrual Leased real estate Maximum Y	Jun. 30, 2012 Acquisition of Qwest Ceased-use leased real estate accrual Leased real estate Weighted average Y
Severance and Leased Real Estate
Current portion of leased real estate accrual			$ 32		$ 27
Noncurrent portion of leased real estate accrual			115		126
Remaining lease terms (in years)						0.1	13.5	9.1
Changes in the entity's accrued liabilities for severance expenses and leased real estate
Balance at the beginning of the period	49	29	150	153
Accrued to expense	13	45	2	1
Payments, net	(42)	(22)	(5)	(4)
Reversals and adjustments		(3)
Balance at the end of period	$ 20	$ 49	$ 147	$ 150