|
Risk Management Credit Risks (Details) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Credit Derivatives [Line Items] | ||
| Netting agreement impact | $ (33) | $ (38) |
| Letters of credit outstanding, amount | 160 | 288 |
|
External Credit Rating, Investment Grade [Member]
|
||
| Credit Derivatives [Line Items] | ||
| Margin Deposit Assets | 21 | 5 |
| Asset position | 657 | |
| Netting agreement impact | (33) | |
| Cash collateral held | 0 | |
| Net exposure | 624 | |
|
Interest Rate Swap [Member] | External Credit Rating, Investment Grade [Member]
|
||
| Credit Derivatives [Line Items] | ||
| Asset position | 579 | |
|
Commodity Contract [Member] | External Credit Rating, Investment Grade [Member]
|
||
| Credit Derivatives [Line Items] | ||
| Asset position | 78 | |
|
KMI [Member] | Commodity [Member]
|
||
| Credit Derivatives [Line Items] | ||
| Letters of credit outstanding, amount | 300 | |
|
Kinder Morgan Energy Partners, L.P. [Member]
|
||
| Credit Derivatives [Line Items] | ||
| Margin Deposit Assets | 21 | 5 |
|
Kinder Morgan Energy Partners, L.P. [Member] | External Credit Rating, Non Investment Grade [Member]
|
||
| Credit Derivatives [Line Items] | ||
| Collateral liability, down graded two notches results in margin deposits held by counterparties | $ 13 |