Shareowners' Equity (Parenthetical) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Jun. 30, 2011
Noncontrolling Interest [Line Items]
Preferred Stock, Shares Issued	22,500	22,500
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Proceeds From Issuance Of Preferred Stock	$ 2,227	$ 2,227	$ 0
Initial Fixed Interest Rate Of Preferred Stock	7.125%	7.125%
Percentage Points Over Three Month LIBOR	5.296%	5.296%
Dividend Amount Paid To Parent	475
Special Dividend Paid To Parent	$ 2,525