CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue
Revenue from contract with customer	$ 468.6
Lease revenue - related parties	56.1
Total revenue	524.7	$ 470.1	$ 452.9
Costs and expenses
Operations and maintenance – third parties	107.5	104.1	76.9
Operations and maintenance – related parties	54.4	45.6	40.0
Cost of product sold - third parties	7.4	0.0	0.0
Cost of product sold - related parties	25.3	0.0	0.0
Loss from disposition of fixed assets	(3.4)	0.1	0.2
General and administrative – third parties	7.8	10.1	9.7
General and administrative – related parties	51.7	47.7	43.7
Depreciation, amortization and accretion	45.9	45.0	43.1
Property and other taxes	15.9	17.4	15.8
Total costs and expenses	312.5	270.0	229.4
Operating income	212.2	200.1	223.5
Income from equity method investments	234.9	186.6	138.1
Dividend income from cost investments	66.8	37.4	28.3
Other income (loss)	31.4	0.0	(0.1)
Investment, dividend and other income	333.1	224.0	166.3
Interest expense, net	62.5	32.2	12.3
Income before income taxes	482.8	391.9	377.5
Income tax expense	0.4	0.1	0.0
Net income	482.4	391.8	377.5
Less: Net income attributable to the Parent	0.0	77.3	102.3
Less: Net income attributable to noncontrolling interests	18.3	19.2	30.3
Net income attributable to the Partnership	464.1	295.3	244.9
General partner's interest in net income attributable to the Partnership	134.4	64.6	25.0
Limited Partners' interest in net income attributable to the Partnership	$ 329.7	$ 230.7	$ 219.9
Net income per Limited Partner Unit - Basic and Diluted (in dollars):
Distributions per Limited Partner unit (in dollars per share)	$ 1.4950	$ 1.2461	$ 1.0258
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)	$ 1.50	$ 1.28	$ 1.32
Common Units | Shell Pipeline Company L P
Weighted average Limited Partner Units outstanding - Basic and Diluted:
Weighted average limited partner units - Basic and Diluted (in units)	99.0	89.0	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)	$ 0	$ 0	$ 1.27
Subordinated Units | Shell Pipeline Company L P
Costs and expenses
Net income		$ 0.0	$ 85.5
Weighted average Limited Partner Units outstanding - Basic and Diluted:
Weighted average limited partner units - Basic and Diluted (in units)	0.0	0.0	67.5
Common unitholders - public
Costs and expenses
Net income	$ 182.4	$ 118.4	$ 107.2
Weighted average Limited Partner Units outstanding - Basic and Diluted:
Weighted average limited partner units - Basic and Diluted (in units)	121.3	91.4	80.4
Common unitholders - public | Shell Pipeline Company L P
Costs and expenses
Net income	$ 147.3	$ 112.3	$ 27.2
Product Revenue
Revenue
Revenue from contract with customer	30.7	0.0	0.0
Third Parties | Transportation, Terminaling And Storage Services
Revenue
Revenue from contract with customer	209.4	235.6	251.5
Third Parties | Product Revenue
Revenue
Revenue from contract with customer	2.2	0.0	0.0
Related Parties
Revenue
Lease revenue - related parties	56.1	56.3	13.1
Related Parties | Transportation, Terminaling And Storage Services
Revenue
Revenue from contract with customer	228.5	178.2	188.3
Related Parties | Product Revenue
Revenue
Revenue from contract with customer	$ 28.5	$ 0.0	$ 0.0