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Consolidated Statements of Changes in Equity (USD $)
In Millions, unless otherwise specified
Total
Members Equity
Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2012 $ 34,329 $ 34,574 $ (245)
Increase (Decrease) in Member's Equity [Roll Forward]      
Cash distributions to Parent (2,000) (2,000) 0
Comprehensive income, net of tax 1,687 1,682 5
Balance at Jun. 30, 2013 $ 34,016 $ 34,256 $ (240)