Schedule I - Condensed Financial Information of Parent (Divdiends from Subsidiaries and Affiliates) (Details) (Parent Company, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Parent Company
Condensed Financial Statements, Captions [Line Items]
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries	$ 818	$ 1,140	$ 1,091
Cash Dividends Paid to Parent Company by Unconsolidated Subsidiaries	$ 0	$ 0	$ 0