Acquisitions and Discontinued Operations FTC Natural Gas Pipelines Disposal Group Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			0 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Nov. 01, 2012 KMP FTC Natural Gas Pipelines [Member]	Dec. 31, 2012 KMP FTC Natural Gas Pipelines [Member]	Dec. 31, 2012 KMP FTC Natural Gas Pipelines [Member]	Dec. 31, 2011 KMP FTC Natural Gas Pipelines [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from disposal of discontinued operations	$ 0	$ 1,791	$ 0	$ 1,791
Selling expenses related to assets held for sale				78
Contributions from General Partner	38		0			45
Operating revenues					227		322
Operating expenses					(131)		(182)
Depreciation and amortization					(7)		(27)
Disposal group, including discontinued operations, other expense					(1)		0
Earnings from equity investments					70		87
Interest income and Other, net					2		2
Discontinued Operation, Tax Effect of Discontinued Operation					0		(1)
Earnings from discontinued operations					$ 160		$ 201