Equity - Schedule of Number of Units Outstanding (Details) - shares							3 Months Ended	12 Months Ended
	Jun. 09, 2016	May 23, 2016	Mar. 29, 2016	Nov. 17, 2015	May 18, 2015	Nov. 03, 2014	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (in units)							154,941,269	154,941,269	137,704,220
Units issued in connection with private placement (in units)								765,307	7,849,294
Units issued in connection with public offering (in units)						137,704,220		25,229,591	9,387,755
Ending balance (in units)								180,936,167	154,941,269
Common Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Units issued in connection with private placement (in units)					7,692,308
Units issued in connection with public offering (in units)				9,200,000
General Partner
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (in units)							3,098,825	3,098,825	2,754,084
Units issued in connection with private placement (in units)					156,986		15,307	15,307	156,986
Units issued in connection with public offering (in units)	32,143		258,163			2,754,084		504,591	187,755
Ending balance (in units)								3,618,723	3,098,825
General Public | Common Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (in units)							62,892,308	62,892,308	46,000,000
Units issued in connection with private placement (in units)							750,000	750,000	7,692,308
Units issued in connection with public offering (in units)		1,575,000	12,650,000			46,000,000		24,725,000	9,200,000
Ending balance (in units)								88,367,308	62,892,308
Shell Pipeline Company L P | Common Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (in units)							21,475,068	21,475,068	21,475,068
Units issued in connection with private placement (in units)								0	0
Units issued in connection with public offering (in units)						21,475,068		0	0
Ending balance (in units)								21,475,068	21,475,068
Shell Pipeline Company L P | Subordinate Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance (in units)							67,475,068	67,475,068	67,475,068
Units issued in connection with private placement (in units)								0	0
Units issued in connection with public offering (in units)						67,475,068		0	0
Ending balance (in units)								67,475,068	67,475,068