Guarantee of Securities of Subsidiaries Cash Flows (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Guarantor Obligations [Line Items]
Net Cash Provided by (Used in) Operating Activities		$ 3,872	$ 3,279	$ 2,874
Payments to Acquire Property, Plant, and Equipment		(3,218)	(1,900)	(1,199)
Payments for (Proceeds from) Other Investing Activities		48	(25)	62
Net Cash Provided by (Used in) Investing Activities		(4,105)	(3,549)	(2,417)
Debt issue Costs		(22)	(16)	(18)
Contributions from noncontrolling interests		148	62	29
Distributions to noncontrolling interests		41	32	28
Other, net		(1)	(1)	0
Net Cash Provided by (Used in) Financing Activities		129	382	(169)
Effect of Exchange Rate on Cash and Cash Equivalents		(21)	8	(8)
Cash and Cash Equivalents, Period Increase (Decrease)		(125)	120	280
Proceeds from sale of investments in Express pipeline system		0	1,791	0
Proceeds from Equity Method Investment, Dividends or Distributions		(204)	(177)	(371)
Proceeds from Contributions from Affiliates		279	322	286
Proceeds from Issuance of Common Limited Partners Units	900	1,285	909	955
Pre-acquisition contributions and distributions from KMI to drop-down asset group		(35)	26	0
KMP and EPB [Member]
Guarantor Obligations [Line Items]
Proceeds from Issuance of Debt		10,227	9,270	7,502
Repayments of Debt		(8,582)	(8,028)	(6,394)
Parent Company [Member]
Guarantor Obligations [Line Items]
Net Cash Provided by (Used in) Operating Activities		3,160	2,508	2,185
Payment to KMI for drop-down asset groups, net of cash aquired		0	0
Payments to Acquire Property, Plant, and Equipment		0	0	0
Payments for (Proceeds from) Other Investing Activities		(5,753)	(4,871)	(3,419)
Payments for (Proceeds from) Other Investing Activities		(12)	(15)	8
Net Cash Provided by (Used in) Investing Activities		(5,765)	(4,886)	(3,411)
Debt issue Costs		(22)	(16)	(18)
Contributions from noncontrolling interests		0	0	0
Other, net		(1)	(1)
Net Cash Provided by (Used in) Financing Activities		2,520	2,472	1,199
Effect of Exchange Rate on Cash and Cash Equivalents		0	0	0
Cash and Cash Equivalents, Period Increase (Decrease)		(85)	94	(27)
Payments to Acquire Investments		0	0	0
Proceeds from sale of investments in Express pipeline system		0
Proceeds from sale of investments in Express pipeline system			0
Proceeds from (Repayments of) Related Party Debt		0	0	0
Proceeds from sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs		0	0	0
Proceeds from Equity Method Investment, Dividends or Distributions		0	0	0
Proceeds from Contributions from Affiliates		0	0	0
Proceeds from Issuance of Debt		10,213	9,270	7,502
Repayments of Debt		(7,627)	(8,003)	(6,233)
Proceeds from Issuance or Sale of Equity		210	727
Payments for (Proceeds from) Businesses and Interest in Affiliates		1,592	2,069	1,208
Proceeds from Issuance of Common Limited Partners Units		1,285	909	955
Contributions from general partner		38	45
Pre-acquisition contributions and distributions from KMI to drop-down asset group		0	0
Distributions to partners		(3,168)	(2,528)	(2,215)
Proceeds from (Payments to) Noncontrolling Interests		0	0	0
Cash		95	1	28
Cash		10	95	1
Subsidiary Issuer [Member]
Guarantor Obligations [Line Items]
Net Cash Provided by (Used in) Operating Activities		(25)	0	0
Payment to KMI for drop-down asset groups, net of cash aquired		0	0
Payments to Acquire Property, Plant, and Equipment		(141)	0	0
Payments for (Proceeds from) Other Investing Activities		(287)	0	0
Payments for (Proceeds from) Other Investing Activities		0	0	0
Net Cash Provided by (Used in) Investing Activities		(423)	0	0
Debt issue Costs		0	0	0
Contributions from noncontrolling interests		0	0	0
Other, net		0	0
Net Cash Provided by (Used in) Financing Activities		449	0	0
Effect of Exchange Rate on Cash and Cash Equivalents		0	0	0
Cash and Cash Equivalents, Period Increase (Decrease)		1	0	0
Payments to Acquire Investments		5	0	0
Proceeds from sale of investments in Express pipeline system		0
Proceeds from sale of investments in Express pipeline system			0
Proceeds from (Repayments of) Related Party Debt		0	0	0
Proceeds from sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs		0	0	0
Proceeds from Equity Method Investment, Dividends or Distributions		0	0	0
Proceeds from Contributions from Affiliates		0	0	0
Proceeds from Issuance of Debt		0	0	0
Repayments of Debt		(854)	0	0
Proceeds from Issuance or Sale of Equity		0	0
Payments for (Proceeds from) Businesses and Interest in Affiliates		1,303	0	0
Proceeds from Issuance of Common Limited Partners Units		0	0	0
Contributions from general partner		0	0
Pre-acquisition contributions and distributions from KMI to drop-down asset group		0	0
Distributions to partners		0	0	0
Proceeds from (Payments to) Noncontrolling Interests		0	0	0
Cash		0	0	0
Cash		1	0	0
Non-Guarantor Subsidiaries [Member]
Guarantor Obligations [Line Items]
Net Cash Provided by (Used in) Operating Activities		4,529	3,800	3,337
Payment to KMI for drop-down asset groups, net of cash aquired		(994)	(3,465)
Payments to Acquire Property, Plant, and Equipment		(3,077)	(1,900)	(1,199)
Payments for (Proceeds from) Other Investing Activities		(1,762)	(2,069)	(1,208)
Payments for (Proceeds from) Other Investing Activities		60	(10)	54
Net Cash Provided by (Used in) Investing Activities		(5,719)	(5,603)	(3,633)
Debt issue Costs		0	0	0
Contributions from noncontrolling interests		148	62	29
Other, net		0	0
Net Cash Provided by (Used in) Financing Activities		1,170	1,821	611
Effect of Exchange Rate on Cash and Cash Equivalents		(21)	8	(8)
Cash and Cash Equivalents, Period Increase (Decrease)		(41)	26	307
Payments to Acquire Investments		(297)	(83)	(1,179)
Proceeds from sale of investments in Express pipeline system		402
Proceeds from sale of investments in Express pipeline system			1,791
Proceeds from (Repayments of) Related Party Debt		1	66	31
Proceeds from sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs		86	100	25
Proceeds from Equity Method Investment, Dividends or Distributions		(204)	(177)	(371)
Proceeds from Contributions from Affiliates		66	144	214
Proceeds from Issuance of Debt		14	0	0
Repayments of Debt		(101)	(25)	(161)
Proceeds from Issuance or Sale of Equity		0	0
Payments for (Proceeds from) Businesses and Interest in Affiliates		4,907	4,871	3,419
Proceeds from Issuance of Common Limited Partners Units		0	0	0
Contributions from general partner		0	0
Pre-acquisition contributions and distributions from KMI to drop-down asset group		35	(26)
Distributions to partners		(3,792)	(3,029)	(2,648)
Proceeds from (Payments to) Noncontrolling Interests		(41)	(32)	(28)
Cash		434	408	101
Cash		393	434	408
Consolidation, Eliminations [Member]
Guarantor Obligations [Line Items]
Net Cash Provided by (Used in) Operating Activities		(3,792)	(3,029)	(2,648)
Payment to KMI for drop-down asset groups, net of cash aquired		0	0
Payments to Acquire Property, Plant, and Equipment		0	0	0
Payments for (Proceeds from) Other Investing Activities		7,802	6,940	4,627
Payments for (Proceeds from) Other Investing Activities		0	0	0
Net Cash Provided by (Used in) Investing Activities		7,802	6,940	4,627
Debt issue Costs		0	0	0
Contributions from noncontrolling interests		0	0	0
Other, net		0	0
Net Cash Provided by (Used in) Financing Activities		(4,010)	(3,911)	(1,979)
Effect of Exchange Rate on Cash and Cash Equivalents		0	0	0
Cash and Cash Equivalents, Period Increase (Decrease)		0	0	0
Payments to Acquire Investments		0	0	0
Proceeds from sale of investments in Express pipeline system		0
Proceeds from sale of investments in Express pipeline system			0
Proceeds from (Repayments of) Related Party Debt		0	0	0
Proceeds from sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs		0	0	0
Proceeds from Equity Method Investment, Dividends or Distributions		0	0	0
Proceeds from Contributions from Affiliates		0	0	0
Proceeds from Issuance of Debt		0	0	0
Repayments of Debt		0	0	0
Proceeds from Issuance or Sale of Equity		0	0
Payments for (Proceeds from) Businesses and Interest in Affiliates		(7,802)	(6,940)	(4,627)
Proceeds from Issuance of Common Limited Partners Units		0	0	0
Contributions from general partner		0	0
Pre-acquisition contributions and distributions from KMI to drop-down asset group		0	0
Distributions to partners		3,792	3,029	2,648
Proceeds from (Payments to) Noncontrolling Interests		0	0	0
Cash		0	0	0
Cash		0	0	0
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Guarantor Obligations [Line Items]
Net Cash Provided by (Used in) Operating Activities		3,872	3,279	2,874
Payment to KMI for drop-down asset groups, net of cash aquired		(994)	(3,465)
Payments to Acquire Property, Plant, and Equipment		(3,218)	(1,900)	(1,199)
Payments for (Proceeds from) Other Investing Activities		0	0	0
Payments for (Proceeds from) Other Investing Activities		48	(25)	62
Net Cash Provided by (Used in) Investing Activities		(4,105)	(3,549)	(2,417)
Debt issue Costs		(22)	(16)	(18)
Contributions from noncontrolling interests		148	62	29
Other, net		(1)	(1)
Net Cash Provided by (Used in) Financing Activities		129	382	(169)
Effect of Exchange Rate on Cash and Cash Equivalents		(21)	8	(8)
Cash and Cash Equivalents, Period Increase (Decrease)		(125)	120	280
Payments to Acquire Investments		(292)	(83)	(1,179)
Proceeds from sale of investments in Express pipeline system		402
Proceeds from sale of investments in Express pipeline system			1,791
Proceeds from (Repayments of) Related Party Debt		1	66	31
Proceeds from sale or casualty of property, plant and equipment, investments and other net assets, net of removal costs		86	100	25
Proceeds from Equity Method Investment, Dividends or Distributions		(204)	(177)	(371)
Proceeds from Contributions from Affiliates		66	144	214
Proceeds from Issuance of Debt		10,227	9,270	7,502
Repayments of Debt		(8,582)	(8,028)	(6,394)
Proceeds from Issuance or Sale of Equity		210	727
Payments for (Proceeds from) Businesses and Interest in Affiliates		0	0	0
Proceeds from Issuance of Common Limited Partners Units		1,285	909	955
Contributions from general partner		38	45
Pre-acquisition contributions and distributions from KMI to drop-down asset group		35	(26)
Distributions to partners		(3,168)	(2,528)	(2,215)
Proceeds from (Payments to) Noncontrolling Interests		(41)	(32)	(28)
Cash		529	409	129
Cash		$ 404	$ 529	$ 409