CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares	Dec. 31, 2016	Dec. 31, 2015
Shell Pipeline Company L P
General partners' capital account, units issued (in units)	3,618,723	3,098,825
General partners' capital account, units outstanding (in units)	3,618,723	3,098,825
Common unitholders
Limited partners' capital account, units outstanding (in units)	109,842,376
Common unitholders | General Public
Limited partners' capital account, units issued (in units)	88,367,308	62,892,308
Limited partners' capital account, units outstanding (in units)	88,367,308	62,892,308
Common unitholders | Shell Pipeline Company L P
Limited partners' capital account, units issued (in units)	21,475,068	21,475,068
Limited partners' capital account, units outstanding (in units)	21,475,068	21,475,068
Subordinated Units | Shell Pipeline Company L P
Limited partners' capital account, units issued (in units)	67,475,068	67,475,068
Limited partners' capital account, units outstanding (in units)	67,475,068	67,475,068