CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue
Third parties	$ 201.5	$ 222.8	$ 155.0
Related parties	89.8	103.7	95.3
Total revenue	291.3	326.5	250.3
Costs and expenses
Operations and maintenance - third parties	46.9	46.3	41.6
Operations and maintenance - related parties	20.7	18.5	21.7
Loss from disposition of fixed assets	0.1	0.0	0.2
General and administrative - third parties	8.1	10.2	3.4
General and administrative - related parties	23.1	24.6	17.0
Depreciation, amortization and accretion	23.7	21.6	18.4
Property and other taxes	8.2	7.5	6.2
Total costs and expenses	130.8	128.7	108.5
Operating income	160.5	197.8	141.8
Income from equity method investments	101.1	70.1	6.7
Dividend income from cost investments	16.1	9.2	0.8
Investment, dividend and other income	117.2	79.3	7.5
Interest expense, net	12.3	4.3	0.2
Income before income taxes	265.4	272.8	149.1
Income tax expense (benefit)	0.0	(0.1)	0.2
Net income	265.4	272.9	148.9
Less: Net income attributable to the Parent	0.0	39.3	124.1
Less: Net income attributable to noncontrolling interests	20.5	66.5	11.4
Net income attributable to the Partnership	244.9	167.1	13.4
General partner's interest in net income attributable to the Partnership	25.0	5.0	0.3
Limited Partners' interest in net income attributable to the Partnership	$ 219.9	$ 162.1	$ 13.1
Net income per Limited Partner Unit - Basic and Diluted (in dollars):
Distributions per Limited Partner unit (in dollars per share)	$ 1.02575	$ 0.7900	$ 0.1042
Common Units
Net income per Limited Partner Unit - Basic and Diluted (in dollars):
Net income per Limited Partner Unit - Basic and Diluted (in dollars per share)	$ 1.32	$ 1.16	$ 0.10
Common Units | Shell Pipeline Company L P
Weighted average Limited Partner Units outstanding - Basic and Diluted (in millions):
Weighted average limited partner units - Basic (in units)	21.5	21.5	21.5
Subordinated Units
Net income per Limited Partner Unit - Basic and Diluted (in dollars):
Net income per Limited Partner Unit - Basic and Diluted (in dollars per share)	$ 1.27	$ 1.14	$ 0.10
Subordinated Units | Shell Pipeline Company L P
Costs and expenses
Net income	$ 85.5	$ 76.6	$ 6.5
Weighted average Limited Partner Units outstanding - Basic and Diluted (in millions):
Weighted average limited partner units - Diluted (in units)	67.5	67.5	67.5
Common unitholders - public
Costs and expenses
Net income	$ 107.2	$ 61.1	$ 4.5
Weighted average Limited Partner Units outstanding - Basic and Diluted (in millions):
Weighted average limited partner units - Basic (in units)	80.4	51.9	46.0
Common unitholders - public | Shell Pipeline Company L P
Costs and expenses
Net income	$ 27.2	$ 24.4	$ 2.1