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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Recognizable events No recognizable events occurred subsequent to September 30, 2015. Non-recognizable events Cash Distribution. In October 2015, our general partner's board of directors declared a quarterly distribution of $0.7625 per unit to be paid on November 13, 2015 to unitholders of record at the close of business on November 2, 2015. The total cash distributions expected to be paid under this declaration are approximately $173.4 million. Credit Facilities. On October 27, 2015, we entered into a $1.0 billion amended and restated revolving credit facility and a new $250.0 million 364-day revolving credit facility. The $1.0 billion facility matures on October 27, 2020, while the 364-day facility matures on October 25, 2016, subject to a term-out option. We may exercise the term-out option no later than 30 days prior to October 25, 2016 and elect to have all outstanding borrowings converted into a term loan due and payable on October 25, 2018, subject to the payment of a term-out fee. Borrowings under our new credit facilities will be unsecured and bear interest at LIBOR, plus a spread ranging from 1.00% to 1.625% based on our credit ratings and amounts outstanding. Additionally, commitment fees are assessed on undrawn amounts under our $1.0 billion facility at a rate between 0.100% and 0.275% and under our 364-day facility at a rate between 0.080% and 0.225%, subject to our credit ratings. Our commitment fee was 0.125% on our $1.0 billion facility and 0.100% on our 364-day facility at October 27, 2015. Debt placement costs related to our $1.0 billion facility and our 364-day facility of $1.4 million and $0.1 million, respectively, will be amortized over the term of the credit facilities. Borrowings from the credit facilities will be used for general purposes, including capital expenditures.