Equity - Schedule of Number of Units Outstanding (Details) - shares		3 Months Ended
	Mar. 29, 2016	Mar. 31, 2016
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at December 31, 2015 (in units)		154,941,269
Units issued in connection with ATM Offering (in units)		765,307
Units issued in connection with public offering (in units)		12,908,163
Balance at March 31, 2016 (in units)		168,614,739
General Partner
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at December 31, 2015 (in units)		3,098,825
Units issued in connection with ATM Offering (in units)		15,307
Units issued in connection with public offering (in units)	258,163	258,163
Balance at March 31, 2016 (in units)		3,372,295
General Public | Common Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at December 31, 2015 (in units)		62,892,308
Units issued in connection with ATM Offering (in units)		750,000
Units issued in connection with public offering (in units)	12,650,000	12,650,000
Balance at March 31, 2016 (in units)		76,292,308
Shell Pipeline Company L P | Common Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at December 31, 2015 (in units)		21,475,068
Units issued in connection with ATM Offering (in units)		0
Units issued in connection with public offering (in units)		0
Balance at March 31, 2016 (in units)		21,475,068
Shell Pipeline Company L P | Subordinate Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Balance at December 31, 2015 (in units)		67,475,068
Units issued in connection with ATM Offering (in units)		0
Units issued in connection with public offering (in units)		0
Balance at March 31, 2016 (in units)		67,475,068