Related Party Transactions (Details) (Targa Resource Partners, L.P., USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Targa Resource Partners, L.P.
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 1,600,000	$ 400,000	$ 13,800,000	$ 14,600,000
Accounts Payable, Related Parties	$ 0		$ 0		$ 0

Amount for accounts payable to related parties.

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