Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Cash Flows (Parenthetical)

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Condensed Consolidated Statements of Cash Flows (Parenthetical) (USD $)
In Billions, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Other Significant Noncash Transactions [Line Items]  
Non-cash financing activities $ 1.1