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Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Related Party Transaction [Line Items]
Cash distributions	$ 750	$ 1,000
Related Party Transaction Revenue with Affiliates	40	38
Related Party Transaction Expenditures From Transactions With Affiliates	6	6
Parent Company
Related Party Transaction [Line Items]
Cash distributions	750	1,000
Tax payments to parent company	$ 0	$ 264

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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