Related Party Transactions (Schedule of Related Party Receivables Payables) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Related Party Transaction [Line Items]
Receivables from related parties	$ 2,363	$ 2,539
Affiliated Entity
Related Party Transaction [Line Items]
Receivables from related parties	109	146
Accounts and notes payable to related parties	$ 67	$ 195

Carrying amount as of the balance sheet date of obligations due all related parties.

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