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Guarantee of Securities of Subsidiaries Income Statement and Comprehensive Income (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Guarantor Obligations [Line Items] |  |  |
Total Revenues | $ 13,705 | $ 13,058 | $ 14,403
Costs of sales | 4,345 | 3,429 | 4,059
Depreciation, depletion and amortization | 2,261 | 2,209 | 2,309
Other operating expenses | (1) | (1) | (3)
Total Operating Costs, Expenses and Other | 10,161 | 9,486 | 11,956
Operating Income | 3,544 | 3,572 | 2,447
Earnings from equity investments | 578 | 497 | 414
Interest, net | (1,832) | (1,806) | (2,051)
Amortization of excess cost of equity investments and other, net | 82 | 44 | 43
Income Before Income Taxes | 2,161 | 1,638 | 772
Income Tax Expense | (1,938) | (917) | (564)
Net Income | 223 | 721 | 208
Net (Income) Loss Attributable to Noncontrolling Interests | (40) | (13) | 45
Net Income Attributable to Kinder Morgan, Inc. | 183 | 708 | 253
Preferred Stock Dividends | (156) | (156) | (26)
Net Income Available to Common Stockholders | 27 | 552 | 227
Total other comprehensive loss | 115 | (200) | (444)
Comprehensive (loss) income | 338 | 521 | (236)
Comprehensive (income) loss attributable to noncontrolling interests | (86) | (13) | 45
Comprehensive (loss) income attributable to controlling interests | 252 | 508 | (191)
Parent Issuer and Guarantor |  |  |
Guarantor Obligations [Line Items] |  |  |
Total Revenues | 35 | 34 | 37
Costs of sales | 0 | 0 | 0
Depreciation, depletion and amortization | 16 | 18 | 22
Other operating expenses | 76 | 725 | 71
Total Operating Costs, Expenses and Other | 92 | 743 | 93
Operating Income | (57) | (709) | (56)
Earnings from consolidated subsidiaries | 3,575 | 2,948 | 1,430
Earnings from equity investments | 0 | 0 | 0
Interest, net | (701) | (696) | (686)
Amortization of excess cost of equity investments and other, net | 0 | 0 | 0
Income Before Income Taxes | 2,817 | 1,543 | 688
Income Tax Expense | (2,634) | (835) | (435)
Net Income | 183 | 708 | 253
Net (Income) Loss Attributable to Noncontrolling Interests | 0 | 0 | 0
Net Income Attributable to Kinder Morgan, Inc. | 183 | 708 | 253
Preferred Stock Dividends | (156) | (156) | (26)
Net Income Available to Common Stockholders | 27 | 552 | 227
Total other comprehensive loss | 69 | (200) | (444)
Comprehensive (loss) income | 252 | 508 | (191)
Comprehensive (income) loss attributable to noncontrolling interests | 0 | 0 | 0
Comprehensive (loss) income attributable to controlling interests | 252 | 508 | (191)
Subsidiary Issuer and Guarantor - KMP |  |  |
Guarantor Obligations [Line Items] |  |  |
Total Revenues | 0 | 0 | 0
Costs of sales | 0 | 0 | 0
Depreciation, depletion and amortization | 0 | 0 | 0
Other operating expenses | 1 | (36) | 38
Total Operating Costs, Expenses and Other | 1 | (36) | 38
Operating Income | (1) | 36 | (38)
Earnings from consolidated subsidiaries | 2,681 | 2,802 | 1,631
Earnings from equity investments | 0 | 0 | 0
Interest, net | 7 | 90 | 23
Amortization of excess cost of equity investments and other, net | 0 | 0 | 1
Income Before Income Taxes | 2,687 | 2,928 | 1,617
Income Tax Expense | (5) | (5) | (4)
Net Income | 2,682 | 2,923 | 1,613
Net (Income) Loss Attributable to Noncontrolling Interests | 0 | 0 | 0
Net Income Attributable to Kinder Morgan, Inc. | 2,682 | 2,923 | 1,613
Preferred Stock Dividends | 0 | 0 | 0
Net Income Available to Common Stockholders | 2,682 | 2,923 | 1,613
Total other comprehensive loss | 194 | (341) | (460)
Comprehensive (loss) income | 2,876 | 2,582 | 1,153
Comprehensive (income) loss attributable to noncontrolling interests | 0 | 0 | 0
Comprehensive (loss) income attributable to controlling interests | 2,876 | 2,582 | 1,153
Subsidiary Guarantors |  |  |
Guarantor Obligations [Line Items] |  |  |
Total Revenues | 12,202 | 11,572 | 12,840
Costs of sales | 4,124 | 3,176 | 3,691
Depreciation, depletion and amortization | 1,933 | 1,872 | 1,929
Other operating expenses | 2,999 | 2,459 | 4,770
Total Operating Costs, Expenses and Other | 9,056 | 7,507 | 10,390
Operating Income | 3,146 | 4,065 | 2,450
Earnings from consolidated subsidiaries | 419 | 245 | 118
Earnings from equity investments | 428 | (113) | 384
Interest, net | (1,104) | (1,149) | (1,345)
Amortization of excess cost of equity investments and other, net | (2) | (20) | (17)
Income Before Income Taxes | 2,887 | 3,028 | 1,590
Income Tax Expense | 237 | (33) | (6)
Net Income | 3,124 | 2,995 | 1,584
Net (Income) Loss Attributable to Noncontrolling Interests | 0 | 0 | 0
Net Income Attributable to Kinder Morgan, Inc. | 3,124 | 2,995 | 1,584
Preferred Stock Dividends | 0 | 0 | 0
Net Income Available to Common Stockholders | 3,124 | 2,995 | 1,584
Total other comprehensive loss | 217 | (352) | (325)
Comprehensive (loss) income | 3,341 | 2,643 | 1,259
Comprehensive (income) loss attributable to noncontrolling interests | 0 | 0 | 0
Comprehensive (loss) income attributable to controlling interests | 3,341 | 2,643 | 1,259
Subsidiary Non-Guarantors |  |  |
Guarantor Obligations [Line Items] |  |  |
Total Revenues | 1,614 | 1,511 | 1,575
Costs of sales | 322 | 266 | 367
Depreciation, depletion and amortization | 312 | 319 | 358
Other operating expenses | 524 | 746 | 759
Total Operating Costs, Expenses and Other | 1,158 | 1,331 | 1,484
Operating Income | 456 | 180 | 91
Earnings from consolidated subsidiaries | 59 | 58 | (30)
Earnings from equity investments | 0 | 0 | 0
Interest, net | (34) | (51) | (43)
Amortization of excess cost of equity investments and other, net | 23 | 5 | 8
Income Before Income Taxes | 504 | 192 | 26
Income Tax Expense | 464 | (44) | (119)
Net Income | 968 | 148 | (93)
Net (Income) Loss Attributable to Noncontrolling Interests | 0 | 0 | 0
Net Income Attributable to Kinder Morgan, Inc. | 968 | 148 | (93)
Preferred Stock Dividends | 0 | 0 | 0
Net Income Available to Common Stockholders | 968 | 148 | (93)
Total other comprehensive loss | 160 | 55 | (326)
Comprehensive (loss) income | 1,128 | 203 | (419)
Comprehensive (income) loss attributable to noncontrolling interests | 0 | 0 | 0
Comprehensive (loss) income attributable to controlling interests | 1,128 | 203 | (419)
Consolidated KMI |  |  |
Guarantor Obligations [Line Items] |  |  |
Total Revenues | 13,705 | 13,058 | 14,403
Costs of sales | 4,345 | 3,429 | 4,059
Depreciation, depletion and amortization | 2,261 | 2,209 | 2,309
Other operating expenses | 3,555 | 3,848 | 5,588
Total Operating Costs, Expenses and Other | 10,161 | 9,486 | 11,956
Operating Income | 3,544 | 3,572 | 2,447
Earnings from consolidated subsidiaries | 0 | 0 | 0
Earnings from equity investments | 428 | (113) | 384
Interest, net | (1,832) | (1,806) | (2,051)
Amortization of excess cost of equity investments and other, net | 21 | (15) | (8)
Income Before Income Taxes | 2,161 | 1,638 | 772
Income Tax Expense | (1,938) | (917) | (564)
Net Income | 223 | 721 | 208
Net (Income) Loss Attributable to Noncontrolling Interests | (40) | (13) | 45
Net Income Attributable to Kinder Morgan, Inc. | 183 | 708 | 253
Preferred Stock Dividends | (156) | (156) | (26)
Net Income Available to Common Stockholders | 27 | 552 | 227
Total other comprehensive loss | 115 | (200) | (444)
Comprehensive (loss) income | 338 | 521 | (236)
Comprehensive (income) loss attributable to noncontrolling interests | (86) | (13) | 45
Comprehensive (loss) income attributable to controlling interests | 252 | 508 | (191)
Consolidating Adjustments |  |  |
Guarantor Obligations [Line Items] |  |  |
Total Revenues | (146) | (59) | (49)
Costs of sales | (101) | (13) | 1
Depreciation, depletion and amortization | 0 | 0 | 0
Other operating expenses | (45) | (46) | (50)
Total Operating Costs, Expenses and Other | (146) | (59) | (49)
Operating Income | 0 | 0 | 0
Earnings from consolidated subsidiaries | (6,734) | (6,053) | (3,149)
Earnings from equity investments | 0 | 0 | 0
Interest, net | 0 | 0 | 0
Amortization of excess cost of equity investments and other, net | 0 | 0 | 0
Income Before Income Taxes | (6,734) | (6,053) | (3,149)
Income Tax Expense | 0 | 0 | 0
Net Income | (6,734) | (6,053) | (3,149)
Net (Income) Loss Attributable to Noncontrolling Interests | (40) | (13) | 45
Net Income Attributable to Kinder Morgan, Inc. | (6,774) | (6,066) | (3,104)
Preferred Stock Dividends | 0 | 0 | 0
Net Income Available to Common Stockholders | (6,774) | (6,066) | (3,104)
Total other comprehensive loss | (525) | 638 | 1,111
Comprehensive (loss) income | (7,259) | (5,415) | (2,038)
Comprehensive (income) loss attributable to noncontrolling interests | (86) | (13) | 45
Comprehensive (loss) income attributable to controlling interests | $ (7,345) | $ (5,428) | $ (1,993)

X
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