Guarantee of Securities of Subsidiaries Statements of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Net Cash Provided by Operating Activities	$ 3,476	$ 2,696
Payment to parent as consideration for assets dropped down	0	(994)
Acquisitions of assets and investments, net of cash acquired	(1,100)	(292)
Capital expenditures	(2,603)	(2,160)
Proceeds from sale of investments in Express pipeline system	0	402
Contributions to investments	(319)	(163)
Distributions from equity investments in excess of cumulative earnings	53	48
Natural gas storage and natural gas and liquids line-fill	22	0
Proceeds from Sale of Other Property, Plant, and Equipment	16	61
Other, net	(7)	7
Net Cash Used in Investing Activities	(3,938)	(3,091)
Issuance of debt	9,269	7,915
Payment of debt	(7,427)	(6,574)
Debt issue costs	(20)	(22)
Proceeds from issuance of common units	1,044	1,080
Proceeds from issuance of i-units	134	145
Contributions from noncontrolling interests	94	128
Contributions from General Partner	0	38
Pre-acquisition contributions from KMI to March 2013 drop-down asset group	0	35
Distributions to partners and noncontrolling interests	(2,757)	(2,332)
Other, net	(2)	(1)
Net Cash Provided by Financing Activities	335	412
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(9)	(12)
Net (decrease) increase in Cash and Cash Equivalents	(136)	5
Cash and Cash Equivalents, beginning of period	404	529
Cash and Cash Equivalents, end of period	268	534
Parent Company [Member]
Net Cash Provided by Operating Activities	2,406	2,107
Payment to parent as consideration for assets dropped down		0
Acquisitions of assets and investments, net of cash acquired	0	0
Capital expenditures	0	0
Proceeds from sale of investments in Express pipeline system		0
Contributions to investments	0	0
Distributions from equity investments in excess of cumulative earnings	0	0
Funding (to) from affiliates	2,608	4,807
Natural gas storage and natural gas and liquids line-fill	0
Proceeds from Sale of Other Property, Plant, and Equipment	0	0
Other, net	(1)	4
Net Cash Used in Investing Activities	(2,609)	(4,803)
Issuance of debt	9,269	7,901
Payment of debt	(7,426)	(5,621)
Debt issue costs	(20)	(22)
Funding from affiliates	(46)	1,391
Proceeds from issuance of common units	1,044	1,080
Proceeds from issuance of i-units	134	145
Contributions from noncontrolling interests	0	0
Contributions from General Partner		38
Pre-acquisition contributions from KMI to March 2013 drop-down asset group		0
Distributions to partners and noncontrolling interests	(2,718)	(2,302)
Other, net	(2)	0
Net Cash Provided by Financing Activities	235	2,610
Effect of Exchange Rate Changes on Cash and Cash Equivalents	0	0
Net (decrease) increase in Cash and Cash Equivalents	32	(86)
Cash and Cash Equivalents, beginning of period	10	95
Cash and Cash Equivalents, end of period	42	9
Subsidiary Issuer [Member]
Net Cash Provided by Operating Activities	(35)	(2)
Payment to parent as consideration for assets dropped down		0
Acquisitions of assets and investments, net of cash acquired	0	5
Capital expenditures	(64)	(107)
Proceeds from sale of investments in Express pipeline system		0
Contributions to investments	0	0
Distributions from equity investments in excess of cumulative earnings	0	0
Funding (to) from affiliates	(121)	242
Natural gas storage and natural gas and liquids line-fill	0
Proceeds from Sale of Other Property, Plant, and Equipment	199	0
Other, net	0	0
Net Cash Used in Investing Activities	256	(344)
Issuance of debt	0	0
Payment of debt	0	(854)
Debt issue costs	0	0
Funding from affiliates	(222)	1,201
Proceeds from issuance of common units	0	0
Proceeds from issuance of i-units	0	0
Contributions from noncontrolling interests	0	0
Pre-acquisition contributions from KMI to March 2013 drop-down asset group		0
Distributions to partners and noncontrolling interests	0	0
Other, net	0	0
Net Cash Provided by Financing Activities	(222)	347
Effect of Exchange Rate Changes on Cash and Cash Equivalents	0	0
Net (decrease) increase in Cash and Cash Equivalents	(1)	1
Cash and Cash Equivalents, beginning of period	1	0
Cash and Cash Equivalents, end of period	0	1
Non-Guarantor Subsidiaries [Member]
Net Cash Provided by Operating Activities	4,352	3,352
Payment to parent as consideration for assets dropped down		(994)
Acquisitions of assets and investments, net of cash acquired	(1,100)	(297)
Capital expenditures	(2,738)	(2,053)
Proceeds from sale of investments in Express pipeline system		402
Contributions to investments	(319)	(163)
Distributions from equity investments in excess of cumulative earnings	53	48
Funding (to) from affiliates	(155)	1,291
Natural gas storage and natural gas and liquids line-fill	22
Proceeds from Sale of Other Property, Plant, and Equipment	16	61
Other, net	(6)	3
Net Cash Used in Investing Activities	(3,917)	(4,284)
Issuance of debt	0	14
Payment of debt	(1)	(99)
Debt issue costs	0	0
Funding from affiliates	2,600	3,748
Proceeds from issuance of common units	0	0
Proceeds from issuance of i-units	0	0
Contributions from noncontrolling interests	94	128
Pre-acquisition contributions from KMI to March 2013 drop-down asset group		35
Distributions to partners and noncontrolling interests	(3,286)	(2,791)
Other, net	0	(1)
Net Cash Provided by Financing Activities	(593)	1,034
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(9)	(12)
Net (decrease) increase in Cash and Cash Equivalents	(167)	90
Cash and Cash Equivalents, beginning of period	393	434
Cash and Cash Equivalents, end of period	226	524
Consolidation, Eliminations [Member]
Net Cash Provided by Operating Activities	(3,247)	(2,761)
Payment to parent as consideration for assets dropped down		0
Acquisitions of assets and investments, net of cash acquired	0	0
Capital expenditures	199	0
Proceeds from sale of investments in Express pipeline system		0
Contributions to investments	0	0
Distributions from equity investments in excess of cumulative earnings	0	0
Funding (to) from affiliates	(2,332)	(6,340)
Natural gas storage and natural gas and liquids line-fill	0
Proceeds from Sale of Other Property, Plant, and Equipment	(199)	0
Other, net	0	0
Net Cash Used in Investing Activities	2,332	6,340
Issuance of debt	0	0
Payment of debt	0	0
Debt issue costs	0	0
Funding from affiliates	(2,332)	(6,340)
Proceeds from issuance of common units	0	0
Proceeds from issuance of i-units	0	0
Contributions from noncontrolling interests	0	0
Pre-acquisition contributions from KMI to March 2013 drop-down asset group		0
Distributions to partners and noncontrolling interests	3,247	2,761
Other, net	0	0
Net Cash Provided by Financing Activities	915	(3,579)
Effect of Exchange Rate Changes on Cash and Cash Equivalents	0	0
Net (decrease) increase in Cash and Cash Equivalents	0	0
Cash and Cash Equivalents, beginning of period	0	0
Cash and Cash Equivalents, end of period	0	0
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Net Cash Provided by Operating Activities	3,476	2,696
Payment to parent as consideration for assets dropped down		(994)
Acquisitions of assets and investments, net of cash acquired	(1,100)	(292)
Capital expenditures	(2,603)	(2,160)
Proceeds from sale of investments in Express pipeline system		402
Contributions to investments	(319)	(163)
Distributions from equity investments in excess of cumulative earnings	53	48
Funding (to) from affiliates	0	0
Natural gas storage and natural gas and liquids line-fill	22
Proceeds from Sale of Other Property, Plant, and Equipment	16	61
Other, net	(7)	7
Net Cash Used in Investing Activities	(3,938)	(3,091)
Issuance of debt	9,269	7,915
Payment of debt	(7,427)	(6,574)
Debt issue costs	(20)	(22)
Funding from affiliates	0	0
Proceeds from issuance of common units	1,044	1,080
Proceeds from issuance of i-units	134	145
Contributions from noncontrolling interests	94	128
Contributions from General Partner		38
Pre-acquisition contributions from KMI to March 2013 drop-down asset group		35
Distributions to partners and noncontrolling interests	(2,757)	(2,332)
Other, net	(2)	(1)
Net Cash Provided by Financing Activities	335	412
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(9)	(12)
Net (decrease) increase in Cash and Cash Equivalents	(136)	5
Cash and Cash Equivalents, beginning of period	404	529
Cash and Cash Equivalents, end of period	268	534
General partner | Subsidiary Issuer [Member]
Contributions from General Partner		0
General partner | Non-Guarantor Subsidiaries [Member]
Contributions from General Partner		0
General partner | Consolidation, Eliminations [Member]
Contributions from General Partner		$ 0