Related Party Transactions (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended		1 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Osage Pipeline Co. [Member]	Jun. 30, 2011 Osage Pipeline Co. [Member]	Jun. 30, 2012 Osage Pipeline Co. [Member]	Jun. 30, 2011 Osage Pipeline Co. [Member]	Jun. 30, 2012 Texas Frontera LLC [Member] bbl	Jun. 30, 2012 Double Eagle Pipeline LLC [Member] mi	Jun. 30, 2012 Targa Resource Partners, L.P. [Member]	Jun. 30, 2011 Targa Resource Partners, L.P. [Member]	Jun. 30, 2012 Targa Resource Partners, L.P. [Member]	Jun. 30, 2011 Targa Resource Partners, L.P. [Member]	Jan. 31, 2011 Consultant [Member]	Jun. 30, 2012 Consultant [Member]	Jun. 30, 2011 Consultant [Member]
Related Party Transaction [Line Items]
Interest in equity method investment					50.00%		50.00%		50.00%	50.00%
Purchases from subsidiaries											$ 300,000	$ 100,000	$ 12,500,000	$ 300,000
Affiliate management fee revenue	198,000	192,000	397,000	385,000	200,000	200,000	400,000	400,000
Construction of refined product storage, in barrels									800,000
Construction of pipeline, length in miles										140
Construction funding request									3,700,000	13,000,000
Construction funding request, paid in cash									2,500,000
Construction funding request, applied against capital spending									1,200,000
Consultant fee															300,000
Allocated share-based compensation expense	$ 4,165,000	$ 5,267,000	$ 7,008,000	$ 9,017,000												$ 200,000	$ 1,900,000