CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Current assets
Cash and cash equivalents		$ 137.7	$ 122.1	[1],[2]	$ 93.8	[2]	$ 150.2	[2]
Accounts receivable - third parties, net		17.2	22.7	[1]
Accounts receivable - related parties		23.8	19.3	[1]
Allowance oil		12.4	11.7	[1]
Prepaid expenses		12.5	6.7	[1]
Total current assets		203.6	182.5	[1]
Equity method investments		362.6	324.7	[1]
Property, plant and equipment, net		736.5	733.7	[1]
Cost investments		62.1	62.1	[1]
Other assets		1.7	0.9	[1]
Total assets		1,366.5	1,303.9	[1]
Current liabilities
Accounts payable - third parties		4.0	7.2	[1]
Accounts payable - related parties		11.6	5.6	[1]
Deferred revenue - third parties		5.5	6.0	[1]
Deferred revenue - related parties		13.9	7.9	[1]
Accrued liabilities - third parties		12.7	12.2	[1]
Accrued liabilities - related parties		7.2	5.1	[1]
Total current liabilities		54.9	44.0	[1]
Noncurrent liabilities
Debt payable - related party		1,844.0	686.0	[1]
Lease liability		24.3	24.9	[1]
Accrued liabilities - third party		0.0	6.3	[1]
Asset retirement obligations		6.6	6.4	[1]
Other unearned income		2.6	2.1	[1]
Total noncurrent liabilities		1,877.5	725.7	[1]
Total liabilities		1,932.4	769.7	[1]
Commitments and Contingencies (Note 13)				[1]
(DEFICIT) EQUITY
Total partners' (deficit) capital		(589.2)	98.3	[1]
Noncontrolling interest		23.3	21.5	[1]
Net Parent investment		0.0	414.4	[1]
Total (deficit) equity	[3]	(565.9)	534.2	[1]	632.5		1,088.7
Total liabilities and (deficit) equity		1,366.5	1,303.9	[1]
Shell Pipeline Company L P
(DEFICIT) EQUITY
General partner – SPLC (3,832,293 and 3,618,723 units issued and outstanding as of December 31, 2017 and December 31, 2016)		(2,855.5)	(1,873.7)	[1]
Common Units | General Public
(DEFICIT) EQUITY
Common and subordinated unitholders		2,773.5	2,485.7	[1]
Common Units | Shell Pipeline Company L P
(DEFICIT) EQUITY
Common and subordinated unitholders		(507.2)	(124.1)	[1]
Subordinated Units | Shell Pipeline Company L P
(DEFICIT) EQUITY
Common and subordinated unitholders		0.0	(389.6)	[1]
Total (deficit) equity		$ 0.0	$ (389.6)		$ (409.8)		$ (440.9)

[1] The financial information presented has been retrospectively adjusted for acquisitions of businesses under common control.

[2] The financial information presented has been retrospectively adjusted for acquisitions of businesses under common control.

[3] The financial information presented has been retrospectively adjusted for acquisitions of businesses under common control.