|
Shareowners' Equity (Parenthetical) (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Dec. 31, 2012
|
Sep. 30, 2012
First Preferred Shares Issuance [Member]
|
Dec. 31, 2012
Second Preferred Shares Issuance [Member]
|
Jun. 30, 2013
Second Preferred Shares Issuance [Member]
|
|
| Noncontrolling Interest [Line Items] | ||||||||
| Preferred Stock, Shares Issued | 50,000 | 50,000 | 40,000 | 22,500 | 17,500 | 10,000 | ||
| Preferred Stock, Par or Stated Value Per Share | $ 0.01 | $ 0.01 | $ 0.01 | |||||
| Proceeds From Issuance Of Preferred Stock | $ 990 | $ 990 | $ 2,227 | $ 3,960 | ||||
| Initial Fixed Interest Rate Of Preferred Stock | 5.25% | 5.25% | 7.125% | 6.25% | ||||
| Percentage Points Over Three Month LIBOR | 2.967% | 2.967% | 5.296% | 4.704% | ||||
| Dividend Amount Paid To Parent | 447 | 475 | ||||||
| Special Dividend Paid To Parent | $ 1,500 | $ 2,525 | ||||||