Subsequent Event	9 Months Ended
Sep. 30, 2015
Subsequent Event [Abstract]
Subsequent Events [Text Block]	Subsequent Events On October 27, 2015, in connection with the pending Merger, we amended our $1.0 billion bank revolving credit facility to, among other things, (i) extend the term of the bank revolving credit facility to a five-year term commencing on the date of the closing of the Merger and (ii) increase the borrowing capacity of the bank revolving credit facility to up to $2.0 billion. The amendment will only become effective upon the consummation of the Merger. Subject to consummation of the Merger, our board of directors approved the purchase of the remaining 0.5 percent interest in Pipe Line Holdings from MPC for $12.0 million. This transaction would close at the same time as the Merger.

Subsequent Event

9 Months Ended

Sep. 30, 2015

Subsequent Events

On October 27, 2015, in connection with the pending Merger, we amended our $1.0 billion bank revolving credit facility to, among other things, (i) extend the term of the bank revolving credit facility to a five-year term commencing on the date of the closing of the Merger and (ii) increase the borrowing capacity of the bank revolving credit facility to up to $2.0 billion. The amendment will only become effective upon the consummation of the Merger.

Subject to consummation of the Merger, our board of directors approved the purchase of the remaining 0.5 percent interest in Pipe Line Holdings from MPC for $12.0 million. This transaction would close at the same time as the Merger.