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Pension and Other Postretirement Benefit Plans (Notes) | 3 Months Ended
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Mar. 31, 2013
Pension and Other Postretirement Benefit Plans [Abstract] |
Pension and Other Postretirement Benefits Disclosure [Text Block] | Pension and Other Postretirement Benefit Plans Kinder Morgan, Inc. The components of net benefit (credit) cost for our pension and other postretirement benefit plans, not including KMP and EPB’s plans discussed below, are as follows (in millions):
| Pension Benefits |  | OPEB
| Three Months Ended March 31, |  | Three Months Ended March 31,
| 2013 |  | 2012 |  | 2013 |  | 2012
Service cost | $ | 6 |  |  | $ | 3 |  |  | $ | — |  |  | $ | — |
Interest cost | 23 |  |  | 4 |  |  | 5 |  |  | 1 |
Expected return on assets | (44 | ) |  | (6 | ) |  | (2 | ) |  | (1 | )
Amortization of net actuarial loss (gain) | — |  |  | 2 |  |  | 1 |  |  | 1 |
Settlement (gain) loss (a) | (3 | ) |  | — |  |  | — |  |  | — |
Net benefit (credit) cost | $ | (18 | ) |  | $ | 3 |  |  | $ | 4 |  |  | $ | 1 |
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(a) | Reflects the gain recognized upon the February 2013 settlement of our obligations under the El Paso Supplemental Executive Retirement Plan.
KMP KMP’s combined net benefit costs for its pension and other postretirement benefit plans for each of the three months ended March 31, 2013 and 2012 was approximately $1 million and $3 million, respectively. EPB EPB’s net benefit costs for its other postretirement benefit plans for the three months ended March 31, 2013 was a credit of approximately $1 million.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7, 21, 22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS106-2 -Paragraph 20, 21, 22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Implementation Guide (Q and A) -Number FAS88 -Paragraph 63 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 106 -Paragraph 518 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5, 6, 7, 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 8 -Subparagraph m -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. 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