Guarantee of Securities of Subsidiaries Statements of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net Cash Provided by Operating Activities	$ 1,074	$ 746
Acquisitions of assets-other	(25)	(4)
Loans to related party	(17)	0
Capital expenditures	(809)	(552)
Proceeds from sale of investments in Express pipeline system	0	(403)
Contributions to investments	(35)	(40)
Distributions from equity investments in excess of cumulative earnings	15	19
Natural gas storage and natural gas and liquids line-fill	(21)	(10)
Other, net	(10)	(16)
Net Cash Used in Investing Activities	(1,801)	(1,171)
Issuance of debt	4,498	2,699
Payment of debt	(3,569)	(1,809)
Debt issue costs	(10)	(7)
Contributions from noncontrolling interests	32	65
Pre-acquisition contributions from KMI to March 2013 drop-down asset group	0	35
Distributions to partners and noncontrolling interests	895	730
Other, net	(1)	0
Net Cash Provided by Financing Activities	680	638
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(10)	(6)
Net (decrease) increase in Cash and Cash Equivalents	(57)	207
Cash and cash equivalents	347	736
Parent Company [Member]
Net Cash Provided by Operating Activities	687	542
Payments to Acquire Businesses, Net of Cash Acquired	0
Payment to KMI for March 2013 drop-down asset groups (Note 1)		0
Acquisitions of assets-other	0	0
Loans to related party	(17)
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	545	1,614
Natural gas storage and natural gas and liquids line-fill	0	0
Sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs	0	0
Other, net	(5)	(17)
Net Cash Used in Investing Activities	(567)	(1,631)
Issuance of debt	4,498	2,685
Payment of debt	(3,568)	(1,715)
Debt issue costs	(10)	(7)
Funding (to) from affiliates	(769)	411
Proceeds from issuance of common units	619	385
Proceeds from issuance of i-units	6
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	(883)	(721)
Other, net	(1)
Net Cash Provided by Financing Activities	(108)	1,038
Effect of Exchange Rate Changes on Cash and Cash Equivalents	0	0
Net (decrease) increase in Cash and Cash Equivalents	12	(51)
Cash and cash equivalents	22	44
Subsidiary Issuer [Member]
Net Cash Provided by Operating Activities	(3)	0
Payments to Acquire Businesses, Net of Cash Acquired	0
Payment to KMI for March 2013 drop-down asset groups (Note 1)		0
Acquisitions of assets-other	0	0
Loans to related party	0
Capital expenditures	(27)	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	(97)	0
Natural gas storage and natural gas and liquids line-fill	0	0
Sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs	0	0
Other, net	0	0
Net Cash Used in Investing Activities	70	0
Issuance of debt	0	0
Payment of debt	0	0
Debt issue costs	0	0
Funding (to) from affiliates	(68)	0
Proceeds from issuance of common units	0	0
Proceeds from issuance of i-units	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	(68)	0
Effect of Exchange Rate Changes on Cash and Cash Equivalents	0	0
Net (decrease) increase in Cash and Cash Equivalents	(1)	0
Cash and cash equivalents	0	0
Non-Guarantor Subsidiaries [Member]
Net Cash Provided by Operating Activities	1,444	1,074
Payments to Acquire Businesses, Net of Cash Acquired	960
Payment to KMI for March 2013 drop-down asset groups (Note 1)		(988)
Acquisitions of assets-other	(25)	(4)
Loans to related party	0
Capital expenditures	(782)	(552)
Proceeds from sale of investments in Express pipeline system		403
Contributions to investments	(35)	(40)
Distributions from equity investments in excess of cumulative earnings	15	19
Funding (to) from affiliates	(740)	(411)
Natural gas storage and natural gas and liquids line-fill	(21)	10
Sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs	(19)	(3)
Other, net	(5)	(1)
Net Cash Used in Investing Activities	(1,012)	(1,565)
Issuance of debt	0	14
Payment of debt	(1)	(94)
Debt issue costs	0	0
Funding (to) from affiliates	545	1,614
Proceeds from issuance of common units	0	0
Proceeds from issuance of i-units	0
Contributions from noncontrolling interests	32	65
Pre-acquisition contributions from KMI to March 2013 drop-down asset group		35
Distributions to partners and noncontrolling interests	(1,066)	(879)
Other, net	0
Net Cash Provided by Financing Activities	(490)	755
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(10)	(6)
Net (decrease) increase in Cash and Cash Equivalents	(68)	258
Cash and cash equivalents	325	692
Consolidation, Eliminations [Member]
Net Cash Provided by Operating Activities	(1,054)	(870)
Payments to Acquire Businesses, Net of Cash Acquired	0
Payment to KMI for March 2013 drop-down asset groups (Note 1)		0
Acquisitions of assets-other	0	0
Loans to related party	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	292	(2,025)
Natural gas storage and natural gas and liquids line-fill	0	0
Sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs	0	0
Other, net	0	0
Net Cash Used in Investing Activities	(292)	2,025
Issuance of debt	0	0
Payment of debt	0	0
Debt issue costs	0	0
Funding (to) from affiliates	292	(2,025)
Proceeds from issuance of common units	0	0
Proceeds from issuance of i-units	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	1,054	870
Other, net	0
Net Cash Provided by Financing Activities	1,346	(1,155)
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	0	0
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Net Cash Provided by Operating Activities	1,074	746
Payments to Acquire Businesses, Net of Cash Acquired	960
Payment to KMI for March 2013 drop-down asset groups (Note 1)		(988)
Acquisitions of assets-other	(25)	(4)
Loans to related party	(17)
Capital expenditures	(809)	(552)
Proceeds from sale of investments in Express pipeline system		403
Contributions to investments	(35)	(40)
Distributions from equity investments in excess of cumulative earnings	15	19
Funding (to) from affiliates	0	0
Natural gas storage and natural gas and liquids line-fill	(21)	10
Sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs	(19)	(3)
Other, net	(10)	(16)
Net Cash Used in Investing Activities	(1,801)	(1,171)
Issuance of debt	4,498	2,699
Payment of debt	(3,569)	(1,809)
Debt issue costs	(10)	(7)
Funding (to) from affiliates	0	0
Proceeds from issuance of common units	619	385
Proceeds from issuance of i-units	6
Contributions from noncontrolling interests	32	65
Pre-acquisition contributions from KMI to March 2013 drop-down asset group		35
Distributions to partners and noncontrolling interests	(895)	(730)
Other, net	(1)
Net Cash Provided by Financing Activities	680	638
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(10)	(6)
Net (decrease) increase in Cash and Cash Equivalents	(57)	207
Cash and cash equivalents	$ 347	$ 736