| Schedule of Condensed Balance Sheet [Table Text Block] |
Condensed Consolidating Balance Sheets as of March 31, 2013 (In Millions) | | | | | | | | | | | | | | | | | | | | | | | | | | Parent Guarantor | | Guarantor Subsidiary | | Subsidiary Issuers | | Non-guarantor Subsidiaries | | Eliminations | | Consolidated KMI | ASSETS | | | | | | | | | | | | Cash and cash equivalents | $ | 118 |
| | $ | — |
| | $ | — |
| | $ | 988 |
| | $ | — |
| | $ | 1,106 |
| All other current assets | 684 |
| | 7 |
| | 1 |
| | 8,036 |
| | (6,148 | ) | | 2,580 |
| Property, plant and equipment, net | 17 |
| | — |
| | — |
| | 31,184 |
| | — |
| | 31,201 |
| Investments | 20,490 |
| | 10,682 |
| | 7,574 |
| | 5,596 |
| | (38,569 | ) | | 5,773 |
| Goodwill | — |
| | — |
| | 8,002 |
| | 15,567 |
| | — |
| | 23,569 |
| Deferred charges and all other assets | 505 |
| | — |
| | 1,207 |
| | 5,828 |
| | (3,461 | ) | | 4,079 |
| Total assets | $ | 21,814 |
| | $ | 10,689 |
| | $ | 16,784 |
| | $ | 67,199 |
| | $ | (48,178 | ) | | $ | 68,308 |
| | | | | | | | | | | | | LIABILITIES AND STOCKHOLDERS’ EQUITY | | | | | | | | | | | | Liabilities | | | | | | | | | | | | Current portion of debt | $ | 1,274 |
| | $ | — |
| | $ | 165 |
| | $ | 1,437 |
| | $ | — |
| | $ | 2,876 |
| All other current liabilities | 68 |
| | — |
| | 6,211 |
| | 2,575 |
| | (6,148 | ) | | 2,706 |
| Long-term debt | 4,116 |
| | — |
| | 4,301 |
| | 25,376 |
| | (2,279 | ) | | 31,514 |
| Deferred income taxes | 2,139 |
| | 23 |
| | — |
| | 3,239 |
| | (1,182 | ) | | 4,219 |
| All other long-term liabilities | 542 |
| | — |
| | 173 |
| | 1,970 |
| | — |
| | 2,685 |
| Total liabilities | 8,139 |
| | 23 |
| | 10,850 |
| | 34,597 |
| | (9,609 | ) | | 44,000 |
| | | | | | | | | | | | | Stockholders’ equity | | | | | | | | | | | | Accumulated other comprehensive (loss) income | (157 | ) | | (25 | ) | | (25 | ) | | (8 | ) | | 58 |
| | (157 | ) | Other stockholders’ equity | 13,832 |
| | 10,691 |
| | 5,959 |
| | 21,977 |
| | (38,627 | ) | | 13,832 |
| Total KMI equity | 13,675 |
| | 10,666 |
| | 5,934 |
| | 21,969 |
| | (38,569 | ) | | 13,675 |
| Noncontrolling interests | — |
| | — |
| | — |
| | 10,633 |
| | — |
| | 10,633 |
| Total stockholders’ equity | 13,675 |
| | 10,666 |
| | 5,934 |
| | 32,602 |
| | (38,569 | ) | | 24,308 |
| Total liabilities and stockholders’ equity | $ | 21,814 |
| | $ | 10,689 |
| | $ | 16,784 |
| | $ | 67,199 |
| | $ | (48,178 | ) | | $ | 68,308 |
|
Condensed Consolidating Balance Sheets as of December 31, 2012 (a) (In Millions) | | | | | | | | | | | | | | | | | | | | | | | | | | Parent Guarantor | | Guarantor Subsidiary | | Subsidiary Issuers | | Non-guarantor Subsidiaries | | Eliminations | | Consolidated KMI | ASSETS | | | | | | | | | | | | Cash and cash equivalents | $ | 3 |
| | $ | — |
| | $ | 45 |
| | $ | 666 |
| | $ | — |
| | $ | 714 |
| All other current assets | 778 |
| | — |
| | — |
| | 8,598 |
| | (6,416 | ) | | 2,960 |
| Property, plant and equipment, net | 8 |
| | — |
| | — |
| | 30,988 |
| | — |
| | 30,996 |
| Investments | 20,051 |
| | 12,025 |
| | 8,504 |
| | 5,645 |
| | (40,421 | ) | | 5,804 |
| Goodwill | — |
| | — |
| | 8,000 |
| | 15,572 |
| | — |
| | 23,572 |
| Deferred charges and all other assets | 1,758 |
| | — |
| | 1,205 |
| | 6,007 |
| | (4,831 | ) | | 4,139 |
| Total assets | $ | 22,598 |
| | $ | 12,025 |
| | $ | 17,754 |
| | $ | 67,476 |
| | $ | (51,668 | ) | | $ | 68,185 |
| | | | | | | | | | | | | LIABILITIES AND STOCKHOLDERS’ EQUITY | | | | | | | | | | | | Liabilities | | | | | | | | | | | | Current portion of debt | $ | 1,035 |
| | $ | — |
| | $ | 115 |
| | $ | 1,251 |
| | $ | — |
| | $ | 2,401 |
| All other current liabilities | 161 |
| | 273 |
| | 6,162 |
| | 2,628 |
| | (6,416 | ) | | 2,808 |
| Long-term debt | 4,832 |
| | 296 |
| | 4,413 |
| | 26,109 |
| | (3,650 | ) | | 32,000 |
| Deferred income taxes | 2,095 |
| | 22 |
| | — |
| | 3,097 |
| | (1,181 | ) | | 4,033 |
| All other long term liabilities | 610 |
| | — |
| | 172 |
| | 2,062 |
| | — |
| | 2,844 |
| Total liabilities | 8,733 |
| | 591 |
| | 10,862 |
| | 35,147 |
| | (11,247 | ) | | 44,086 |
| | | | | | | | | | | | | Stockholders’ equity | | | | | | | | | | | | Accumulated other comprehensive (loss) income | (119 | ) | | (14 | ) | | (14 | ) | | 28 |
| | — |
| | (119 | ) | Other stockholders’ equity | 13,984 |
| | 11,448 |
| | 6,906 |
| | 22,067 |
| | (40,421 | ) | | 13,984 |
| Total KMI equity | 13,865 |
| | 11,434 |
| | 6,892 |
| | 22,095 |
| | (40,421 | ) | | 13,865 |
| Noncontrolling interests | — |
| | — |
| | — |
| | 10,234 |
| | — |
| | 10,234 |
| Total stockholders’ equity | 13,865 |
| | 11,434 |
| | 6,892 |
| | 32,329 |
| | (40,421 | ) | | 24,099 |
| Total liabilities and stockholders’ equity | $ | 22,598 |
| | $ | 12,025 |
| | $ | 17,754 |
| | $ | 67,476 |
| | $ | (51,668 | ) | | $ | 68,185 |
|
|
| Schedule of Condensed Income Statement [Table Text Block] |
ssed in Note 2.
Condensed Consolidating Statements of Income for the Three Months Ended March 31, 2013 (In Millions) | | | | | | | | | | | | | | | | | | | | | | | | | | Parent Guarantor | | Guarantor Subsidiary | | Subsidiary Issuers | | Non-guarantor Subsidiaries | | Eliminations | | Consolidated KMI | Revenues | $ | 9 |
| | $ | — |
| | $ | — |
| | $ | 3,058 |
| | $ | (7 | ) | | $ | 3,060 |
| | | | | | | | | | | | | Costs, expenses and other | | | | | | | | | | | | Costs of sales | — |
| | — |
| | — |
| | 970 |
| | — |
| | 970 |
| Depreciation, depletion and amortization | — |
| | — |
| | — |
| | 412 |
| | — |
| | 412 |
| Other operating expenses | 3 |
| | — |
| | — |
| | 662 |
| | (7 | ) | | 658 |
| Total costs, expenses and other | 3 |
| | — |
| | — |
| | 2,044 |
| | (7 | ) | | 2,040 |
| | | | | | | | | | | | | Operating income (loss) | 6 |
| | — |
| | — |
| | 1,014 |
| | — |
| | 1,020 |
| | | | | | | | | | | | | Other income (expense) | | | | | | | | | | | | Earnings from equity investments | 339 |
| | 61 |
| | 167 |
| | 77 |
| | (543 | ) | | 101 |
| Amortization of excess cost of equity investments and other, net | — |
| | — |
| | — |
| | 218 |
| | — |
| | 218 |
| Interest, net | (65 | ) | | — |
| | (106 | ) | | (231 | ) | | — |
| | (402 | ) | | | | | | | | | | | | | Income from continuing operations before income taxes | 280 |
| | 61 |
| | 61 |
| | 1,078 |
| | (543 | ) | | 937 |
| | | | | | | | | | | | | Income tax benefit (expense) | 12 |
| | — |
| | — |
| | (291 | ) | | — |
| | (279 | ) | | | | | | | | | | | | | Income from continuing operations | 292 |
| | 61 |
| | 61 |
| | 787 |
| | (543 | ) | | 658 |
| | | | | | | | | | | | | Loss from discontinued operations, net of tax | — |
| | — |
| | — |
| | (2 | ) | | — |
| | (2 | ) | | | | | | | | | | | | | Net income | 292 |
| | 61 |
| | 61 |
| | 785 |
| | (543 | ) | | 656 |
| | | | | | | | | | | | | Net income attributable to noncontrolling interests | — |
| | — |
| | — |
| | (364 | ) | | — |
| | (364 | ) | | | | | | | | | | | | | Net income attributable to controlling interests | $ | 292 |
| | $ | 61 |
| | $ | 61 |
| | $ | 421 |
| | $ | (543 | ) | | $ | 292 |
|
Condensed Consolidating Statements of Income for the Three Months Ended March 31, 2012 (In Millions) | | | | | | | | | | | | | | | | | | | | | | | | | | Parent Guarantor | | Guarantor Subsidiary | | Subsidiary Issuers | | Non-guarantor Subsidiaries | | Eliminations | | Consolidated KMI | Revenues | $ | 9 |
| | $ | — |
| | $ | — |
| | $ | 1,848 |
| | $ | — |
| | $ | 1,857 |
| | | | | | | | | | | | | Costs, expenses and other | | | | | | | | | | | | Costs of sales | — |
| | — |
| | — |
| | 580 |
| | — |
| | 580 |
| Depreciation, depletion and amortization | — |
| | — |
| | — |
| | 274 |
| | — |
| | 274 |
| Other operating expenses | 22 |
| | — |
| | — |
| | 465 |
| | — |
| | 487 |
| Total costs, expenses and other | 22 |
| | — |
| | — |
| | 1,319 |
| | — |
| | 1,341 |
| | | | | | | | | | | | | Operating (loss) income | (13 | ) | | — |
| | — |
| | 529 |
| | — |
| | 516 |
| | | | | | | | | | | | | Other income (expense) | | | | | | | | | | | | Earnings from equity investments | 58 |
| | — |
| | — |
| | 72 |
| | (65 | ) | | 65 |
| Amortization of excess cost of equity investments and other, net | 1 |
| | — |
| | — |
| | (2 | ) | | — |
| | (1 | ) | Interest, net | (48 | ) | | — |
| | — |
| | (131 | ) | | — |
| | (179 | ) | | | | | | | | | | | | | (Loss) income from continuing operations before income taxes | (2 | ) | | — |
| | — |
| | 468 |
| | (65 | ) | | 401 |
| | | | | | | | | | | | | Income tax benefit (expense) | 23 |
| | — |
| | — |
| | (119 | ) | | — |
| | (96 | ) | | | | | | | | | | | |
| Income from continuing operations | 21 |
|
| — |
| | — |
| | 349 |
| | (65 | ) | | 305 |
| | | | | | | | | | | | | Loss from discontinued operations, net of tax | — |
| | — |
| | — |
| | (378 | ) | | — |
| | (378 | ) | | | | | | | | | | | | | Net income (loss) | 21 |
| | — |
| | — |
| | (29 | ) | | (65 | ) | | (73 | ) | | | | | | | | | | | | | Net loss attributable to noncontrolling interests | — |
| | — |
| | — |
| | 94 |
| | — |
| | 94 |
| | | | | | | | | | | | | Net income attributable to controlling interests | $ | 21 |
| | $ | — |
| | $ | — |
| | $ | 65 |
| | $ | (65 | ) | | $ | 21 |
|
Condensed C |