Acquisitions and Discontinued Operations Acquisitions (Details) (USD $)	3 Months Ended											0 Months Ended		0 Months Ended				3 Months Ended		0 Months Ended
	Mar. 31, 2014 bbl	Dec. 31, 2013 bbl	Mar. 31, 2013	Dec. 31, 2016 American Petroleum Tankers [Member]	Dec. 31, 2015 American Petroleum Tankers [Member]	Dec. 31, 2014 American Petroleum Tankers [Member]	Mar. 31, 2014 American Petroleum Tankers [Member]	Dec. 31, 2013 American Petroleum Tankers [Member]	Jun. 02, 2013 American Petroleum Tankers [Member]	Dec. 31, 2013 State Class Tankers [Member]	Jun. 02, 2013 Goldsmith-Landreth Field Unit [Member]	May 03, 2013 Kinder Morgan Energy Partners, L.P. [Member] Copano Energy, LLC [Member]	May 01, 2013 Kinder Morgan Energy Partners, L.P. [Member] Copano Energy, LLC [Member]	Jun. 02, 2013 Kinder Morgan Energy Partners, L.P. [Member] Legado Resources [Member]	May 31, 2013 Kinder Morgan Energy Partners, L.P. [Member] Legado Resources [Member]	May 31, 2013 Kinder Morgan Energy Partners, L.P. [Member] Legado Resources [Member] Goldsmith-Landreth Field Unit [Member]	Mar. 14, 2013 Express Pipeline System [Member]	Jun. 30, 2013 Express Pipeline System [Member]	May 01, 2013 Common Units [Member] Kinder Morgan Energy Partners, L.P. [Member] Copano Energy, LLC [Member]	May 03, 2013 Common Units [Member] Kinder Morgan Energy Partners, L.P. [Member] Copano Energy, LLC [Member]
Business Acquisition [Line Items]
Pro Forma Income Attributable to Noncontrolling Interests			$ (9,000,000)
Business Combination, Consideration Transferred												5,200,000,000
Business acquisition, unit exchange ratio																			0.4563
Number of Vessels								5		4
Common Units Issued																				43,371,210
Tanker Capacity	330,000	330,000
Business Acquisition, Cost of Acquired Entity, Cash Paid, Excluding Debt Assumed							960,000,000
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted			$ 0.79
Business Acquisition, Pro Forma Earnings Per Share, Diluted			$ 0.79
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned																				3,733,000,000
Business Acquisition, Share Price																			$ 86.08
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets							2,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets							3,000,000
Business Acquisition, Pro Forma Revenue			3,211,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets							960,000,000
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax			766,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment							887,000,000									298,000,000
Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds									960,000,000
Business Acquisition, Cost of Acquired Entity, percent unit for unit													100.00%
Incentive Distribution Amounts Waived				6,000,000	19,000,000	13,000,000
Payments to Acquire Businesses, Gross														280,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities															18,000,000
Proceeds from sale of investments in Express pipeline system	0		403,000,000															(1,000,000)
Capital expenditures	(809,000,000)		(552,000,000)		(214,000,000)
Income (Loss) from Discontinued Operations	0		(2,000,000)
Business Acquisition, Pro Forma Net Income (Loss)			764,000,000
Asset Retirement Obligations, Noncurrent											12,000,000
Related Party Transaction, Due from (to) Related Party, Noncurrent																	110,000,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net							$ 68,000,000