UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - 9 months ended Sep. 30, 2017 - USD ($) $ in Millions	Total		Non-controlling Interest	Net Parent Investment	[2]	Common units – public	Common units – public Shell Pipeline Company L P	Subordinated Units Shell Pipeline Company L P	General Partner Shell Pipeline Company L P
Beginning Balance at Dec. 31, 2016	$ 336.6	[1],[2]	$ 21.6	$ 216.7		$ 2,485.7	$ (124.1)	$ (389.6)	$ (1,873.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	218.2	[2],[3],[4]	6.3	3.0		83.9	81.0		44.0
Other contributions from Parent	13.5	[2]							13.5
Net proceeds from public offering	283.7	[2]				277.9			5.8
Distributions to unitholders and general partner	(190.4)	[2]				(77.1)	(58.8)	(18.7)	(35.8)
Distribution to noncontrolling interest	(8.6)	[2]	(8.6)
Proceeds from April 2017 divestiture	20.2	[2]	1.5						18.7
Expiration of subordinated period							(408.3)	408.3
May 2017 Acquisition	(630.0)	[2]		(200.7)					(429.3)
Net assets not contributed to the Partnership	(19.0)			(19.0)
Ending Balance at Sep. 30, 2017	$ 24.2	[2]	$ 20.8	$ 0.0		$ 2,770.4	$ (510.2)	$ 0.0	$ (2,256.8)

[1] Prior period financial information has been retrospectively adjusted for the acquisition of the Shell Delta, Na Kika and Refinery Gas Pipeline Operations.

[2] Prior period financial information has been retrospectively adjusted for the acquisition of the Shell Delta, Na Kika and Refinery Gas Pipeline Operations.

[3] The financial information for the nine months ended September 30, 2017 reflects adjustments for the acquisition of the Shell Delta, Na Kika and Refinery Gas Pipeline Operations from January 1, 2017 through May 9, 2017.

[4] The financial information for the nine months ended September 30, 2017 reflects adjustments for the acquisition of the Shell Delta,Na Kika and Refinery Gas Pipeline Operations from January 1, 2017 through May 9, 2017.