|
Shareowners' Equity (Parenthetical) (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | 9 Months Ended | 3 Months Ended | |||
|---|---|---|---|---|---|---|
|
Jun. 30, 2012
|
Sep. 30, 2012
|
Sep. 30, 2011
|
Dec. 31, 2011
|
Jun. 30, 2012
First Preferred Shares Issuance [Member]
|
Sep. 30, 2012
Second Preferred Shares Issuance [Member]
|
|
| Noncontrolling Interest [Line Items] | ||||||
| Preferred Stock, Shares Issued | 40,000 | 0 | 22,500 | 17,500 | ||
| Preferred Stock, Par or Stated Value Per Share | $ 0.01 | $ 0.01 | $ 0.01 | $ 0.01 | ||
| Proceeds From Issuance Of Preferred Stock | $ 3,960 | $ 0 | $ 2,227 | $ 1,733 | ||
| Initial Fixed Interest Rate Of Preferred Stock | 7.125% | 6.25% | ||||
| Percentage Points Over Three Month LIBOR | 5.296% | 4.704% | ||||
| Dividend Amount Paid To Parent | 471 | 946 | ||||
| Special Dividend Paid To Parent | $ 1,975 | $ 4,500 | ||||