Guarantee of Securities of Subsidiaries Statements of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Net Cash Provided by Operating Activities	$ 2,249	$ 1,742
Payment to parent as consideration for assets dropped down	0	(994)
Acquisitions of assets and investments, net of cash acquired	(993)	(286)
Capital expenditures	(1,658)	(1,268)
Proceeds from sale of investments in Express pipeline system	0	403
Contributions to investments	(89)	(93)
Distributions from equity investments in excess of cumulative earnings	37	36
Natural gas storage and natural gas and liquids line-fill	22	0
Sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs	11	23
Other, net	(5)	5
Net Cash Used in Investing Activities	(2,675)	(2,174)
Issuance of debt	6,083	4,858
Payment of debt	(5,060)	(3,860)
Debt issue costs	(11)	(11)
Proceeds from issuance of common units	938	834
Proceeds from issuance of i-units	97	73
Contributions from noncontrolling interests	57	99
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	(1,813)	(1,487)
Other, net	(2)	0
Net Cash Provided by Financing Activities	289	579
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(4)	(20)
Net (decrease) increase in Cash and Cash Equivalents	(141)	127
Cash and Cash Equivalents, beginning of period	404	529
Cash and Cash Equivalents, end of period	263	656
Parent Company [Member]
Net Cash Provided by Operating Activities	1,723	1,548
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	1,571	3,690
Natural gas storage and natural gas and liquids line-fill	0
Sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs	0	0
Other, net	0	5
Net Cash Used in Investing Activities	(1,571)	(3,685)
Issuance of debt	6,083	4,844
Payment of debt	(5,059)	(3,100)
Debt issue costs	(11)	(11)
Funding from affiliates	(392)	832
Proceeds from issuance of common units	938	834
Proceeds from issuance of i-units	97	73
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	(1,789)	(1,468)
Other, net	(1)
Net Cash Provided by Financing Activities	(134)	2,042
Effect of Exchange Rate Changes on Cash and Cash Equivalents	0	0
Net (decrease) increase in Cash and Cash Equivalents	18	(95)
Cash and Cash Equivalents, beginning of period	10	95
Cash and Cash Equivalents, end of period	28
Subsidiary Issuer [Member]
Net Cash Provided by Operating Activities	(29)	6
Payment to parent as consideration for assets dropped down		0
Acquisitions of assets and investments, net of cash acquired	0	5
Capital expenditures	(47)	(60)
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	(72)	501
Natural gas storage and natural gas and liquids line-fill	0
Sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs	192	0
Other, net	0	0
Net Cash Used in Investing Activities	217	(556)
Issuance of debt	0	0
Payment of debt	0	(663)
Debt issue costs	0	0
Funding from affiliates	(189)	1,214
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
Net Cash Provided by Financing Activities	(189)	551
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
Non-Guarantor Subsidiaries [Member]
Net Cash Provided by Operating Activities	2,691	1,956
Payment to parent as consideration for assets dropped down		(994)
Acquisitions of assets and investments, net of cash acquired	(993)	(291)
Capital expenditures	(1,803)	(1,208)
Proceeds from sale of investments in Express pipeline system		403
Contributions to investments	(89)	(93)
Distributions from equity investments in excess of cumulative earnings	37	36
Funding (to) from affiliates	(420)	1,234
Natural gas storage and natural gas and liquids line-fill	22
Sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs	11	23
Other, net	(5)	0
Net Cash Used in Investing Activities	(2,400)	(3,358)
Issuance of debt	0	14
Payment of debt	(1)	(97)
Debt issue costs	0	0
Funding from affiliates	1,660	3,379
Proceeds from issuance of common units	0	0
Proceeds from issuance of i-units	0	0
Contributions from noncontrolling interests	57	99
Pre-acquisition contributions from KMI to March 2013 drop-down asset group		35
Distributions to partners and noncontrolling interests	(2,160)	(1,787)
Other, net	(1)
Net Cash Provided by Financing Activities	(445)	1,643
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(4)	(20)
Net (decrease) increase in Cash and Cash Equivalents	(158)	221
Cash and Cash Equivalents, beginning of period	393	434
Cash and Cash Equivalents, end of period	235
Consolidation, Eliminations [Member]
Net Cash Provided by Operating Activities	(2,136)	(1,768)
Payment to parent as consideration for assets dropped down		0
Acquisitions of assets and investments, net of cash acquired	0	0
Capital expenditures	192	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	(1,079)	(5,425)
Natural gas storage and natural gas and liquids line-fill	0
Sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs	(192)	0
Other, net	0	0
Net Cash Used in Investing Activities	1,079	5,425
Issuance of debt	0	0
Payment of debt	0	0
Debt issue costs	0	0
Funding from affiliates	(1,079)	(5,425)
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	2,136	1,768
Other, net	0
Net Cash Provided by Financing Activities	1,057	(3,657)
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
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Net Cash Provided by Operating Activities	2,249	1,742
Payment to parent as consideration for assets dropped down		(994)
Acquisitions of assets and investments, net of cash acquired	(993)	(286)
Capital expenditures	(1,658)	(1,268)
Proceeds from sale of investments in Express pipeline system		403
Contributions to investments	(89)	(93)
Distributions from equity investments in excess of cumulative earnings	37	36
Funding (to) from affiliates	0	0
Natural gas storage and natural gas and liquids line-fill	22
Sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs	11	23
Other, net	(5)	5
Net Cash Used in Investing Activities	(2,675)	(2,174)
Issuance of debt	6,083	4,858
Payment of debt	(5,060)	(3,860)
Debt issue costs	(11)	(11)
Funding from affiliates	0	0
Proceeds from issuance of common units	938	834
Proceeds from issuance of i-units	97	73
Contributions from noncontrolling interests	57	99
Contributions from General Partner		38
Pre-acquisition contributions from KMI to March 2013 drop-down asset group		35
Distributions to partners and noncontrolling interests	(1,813)	(1,487)
Other, net	(2)
Net Cash Provided by Financing Activities	289	579
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(4)	(20)
Net (decrease) increase in Cash and Cash Equivalents	(141)	127
Cash and Cash Equivalents, beginning of period	404	529
Cash and Cash Equivalents, end of period	263
General Partner [Member] | Subsidiary Issuer [Member]
Contributions from General Partner		0
General Partner [Member] | Non-Guarantor Subsidiaries [Member]
Contributions from General Partner		0
General Partner [Member] | Consolidation, Eliminations [Member]
Contributions from General Partner		$ 0