Acquisitions and Dispositions (Details) (American Life Insurance Company ("American Life") and Delaware American Life Insurance ("DelAm") Member, USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2011
American Life Insurance Company ("American Life") and Delaware American Life Insurance ("DelAm") Member
Restructuring Costs and Other Charges [Abstract]
Balance, beginning of period	$ 9	$ 10
Restructuring charges	7	31
Cash payments	(7)	(32)
Balance, end of period	9	9
Restructuring charges incurred in current period	7	31
Total restructuring charges incurred since inception of plan	$ 41	$ 41

Amount of costs incurred to date for the specified type of restructuring cost.

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Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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

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