Phillips 66 Partners (PSXP) 10-Q 30 Oct 14 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2014
Document Information [Line Items]	'
Entity Registrant Name	'Phillips 66 Partners LP
Entity Central Index Key	'0001572910
Trading Symbol	'PSXP
Current Fiscal Year End Date	'--12-31
Entity Filer Category	'Non-accelerated Filer
Document Type	'10-Q
Document Period End Date	30-Sep-14
Document Fiscal Year Focus	'2014
Document Fiscal Period Focus	'Q3
Amendment Flag	'false
Common Units [Member]	'
Document Information [Line Items]	'
Entity Common Stock, Shares Outstanding	'
Subordinated Units [Member]	'
Document Information [Line Items]	'
Entity Common Stock, Shares Outstanding	'

Consolidated_Statement_of_Inco

Consolidated Statement of Income (USD $)	3 Months Ended			9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Revenues	'	'		'	'
Transportation and terminaling services—related parties	$52.70	$48.70	[1]	$157.70	$134.10	[1]
Transportation and terminaling services—third parties	0.7	1.7	[1]	4.4	3.9	[1]
Other income	'	0.1	[1]	0.1	0.1	[1]
Total revenues	53.4	50.5	[1]	162.2	138.1	[1]
Costs and Expenses	'	'		'	'
Operating and maintenance expenses	12.5	14.2	[1]	37.1	38.4	[1]
Depreciation	4	3.4	[1]	11.5	10	[1]
General and administrative expenses	4.9	3.9	[1]	17	11.2	[1]
Taxes other than income taxes	1.1	1.1	[1]	3.3	3.5	[1]
Interest and debt expense	1.4	0.1	[1]	3.2	0.1	[1]
Total costs and expenses	23.9	22.7	[1]	72.1	63.2	[1]
Income before income taxes	29.5	27.8	[1]	90.1	74.9	[1]
Provision for income taxes	0.1	0.2	[1]	0.6	0.4	[1]
Net Income	29.4	27.6	[1]	89.5	74.5	[1]
Less: Net income attributable to predecessors	'	15.7		9.7	62.6	[1]
Net income attributable to the Partnership	29.4	11.9	[1]	79.8	11.9	[1]
Less: General partner’s interest in net income attributable to the Partnership	2	0.2	[1]	4.5	0.2	[1]
Limited partners’ interest in net income attributable to the Partnership	27.4	11.7	[1]	75.3	11.7	[1]
Net Income Attributable to the Partnership Per Limited Partner Unit—Basic and Diluted (dollars)	'	'		'	'
Cash Distributions Paid Per Unit (dollars)	$0.30	'		$0.80	'
Common Units [Member]	'	'		'	'
Costs and Expenses	'	'		'	'
Net income attributable to the Partnership	'	5.8		'	5.8
Net Income Attributable to the Partnership Per Limited Partner Unit—Basic and Diluted (dollars)	'	'		'	'
Basic, per unit	$0.37	$0.17		$1.04	$0.17
Diluted, per unit	$0.37	$0.17		$1.04	$0.17
Average Limited Partner Units Outstanding—Basis and Diluted (thousands)	'	'		'	'
Basic, units	38,747,707	35,217,112		37,984,685	35,217,112
Diluted, units	38,747,707	35,217,112		37,984,685	35,217,112
Common Units [Member] | Public [Member]	'	'		'	'
Costs and Expenses	'	'		'	'
Net income attributable to the Partnership	'	'		19.3	3.1
Average Limited Partner Units Outstanding—Basis and Diluted (thousands)	'	'		'	'
Basic, units	18,889,000	18,889,000		18,889,000	18,889,000
Diluted, units	18,889,000	18,889,000		18,889,000	18,889,000
Common Units [Member] | Non-public [Member] | Phillips 66 [Member]	'	'		'	'
Costs and Expenses	'	'		'	'
Net income attributable to the Partnership	'	'		20.1	2.7
Average Limited Partner Units Outstanding—Basis and Diluted (thousands)	'	'		'	'
Basic, units	19,859,000	16,328,000		19,096,000	16,328,000
Diluted, units	19,859,000	16,328,000		19,096,000	16,328,000
Subordinated Units [Member]	'	'		'	'
Costs and Expenses	'	'		'	'
Net income attributable to the Partnership	'	5.9		'	5.9
Net Income Attributable to the Partnership Per Limited Partner Unit—Basic and Diluted (dollars)	'	'		'	'
Basic, per unit	$0.37	$0.17		$1.02	$0.17
Diluted, per unit	$0.37	$0.17		$1.02	$0.17
Average Limited Partner Units Outstanding—Basis and Diluted (thousands)	'	'		'	'
Basic, units	35,217,112	35,217,112		35,217,112	35,217,112
Diluted, units	35,217,112	35,217,112		35,217,112	35,217,112
Subordinated Units [Member] | Non-public [Member] | Phillips 66 [Member]	'	'		'	'
Costs and Expenses	'	'		'	'
Net income attributable to the Partnership	'	'		$35.90	$5.90
Net Income Attributable to the Partnership Per Limited Partner Unit—Basic and Diluted (dollars)	'	'		'	'
Basic, per unit	$0.37	$0.17		$1.02	$0.17
Diluted, per unit	$0.37	$0.17		$1.02	$0.17
Average Limited Partner Units Outstanding—Basis and Diluted (thousands)	'	'		'	'
Basic, units	35,217,112	35,217,112		35,217,112	35,217,112
Diluted, units	35,217,112	35,217,112		35,217,112	35,217,112
[1]	Prior-period financial information has been retrospectively adjusted for the Gold Line/Medford Acquisition.

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Sep. 30, 2014
In Millions, unless otherwise specified
Assets	'
Cash and cash equivalents	$43
Accounts receivable—related parties	18.2
Accounts receivable—third parties	0.9
Materials and supplies	2
Other current assets	2.9
Total Current Assets	67
Net properties, plants and equipment	273.9
Goodwill	2.5
Deferred rentals—related parties	6
Deferred tax assets	0.8
Other assets	0.3
Total Assets	350.5
Liabilities	'
Accounts payable—related parties	2.6
Accounts payable—third parties	4.2
Accrued property and other taxes	3.5
Accrued interest—related parties	1.2
Deferred revenues—related parties	3
Total Current Liabilities	14.5
Note payable—related parties	160
Asset retirement obligations	2.5
Other liabilities	0.5
Total Liabilities	177.5
Equity	'
General partner—Phillips 66 (2014—1,509,486 units issued and outstanding; 2013—1,437,433 units issued and outstanding)	-406.4
Total Equity	173
Total Liabilities and Equity	350.5
Public [Member] | Common Units [Member]	'
Equity	'
Unitholders	413.2
Total Equity	413.2
Non-public [Member] | Common Units [Member] | Phillips 66 [Member]	'
Equity	'
Unitholders	53.6
Total Equity	53.6
Non-public [Member] | Subordinated Units [Member] | Phillips 66 [Member]	'
Equity	'
Unitholders	112.6
Total Equity	$112.60

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parenthetical)	Sep. 30, 2014	Dec. 31, 2013
General partner units issued	1,509,486	1,437,433
General partner units outstanding	1,509,486	1,437,433
Common Units [Member] | Public [Member]	'	'
Units issued	18,888,750	18,888,750
Units outstanding	18,888,750	18,888,750
Common Units [Member] | Non-public [Member] | Phillips 66 [Member]	'	'
Units issued	19,858,957	16,328,362
Units outstanding	19,858,957	16,328,362
Subordinated Units [Member] | Non-public [Member] | Phillips 66 [Member]	'	'
Units issued	35,217,112	35,217,112
Units outstanding	35,217,112	35,217,112

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013
Cash Flows From Operating Activities	'		'
Net income	$89.50		$74.50	[1]
Adjustments to reconcile net income to net cash provided by operating activities	'		'
Depreciation	11.5		10	[1]
Deferred rentals—related parties	0.3		-0.4	[1]
Accrued environmental costs	'		-0.4	[1]
Other	0.8		0.3	[1]
Working capital adjustments	'		'
Decrease (increase) in accounts receivable	-7.3		-9.6	[1]
Decrease (increase) in materials and supplies	'		-0.3	[1]
Decrease (increase) in other current assets	-0.6		-3	[1]
Increase (decrease) in accounts payable	-3.5		7.6	[1]
Increase (decrease) in accrued interest	1.2		'
Increase (decrease) in deferred revenues	3		'
Increase (decrease) in environmental accruals	'		-6	[1]
Increase (decrease) in other accruals	0.8		1	[1]
Net Cash Provided by Operating Activities	95.7		73.7	[1]
Cash Flows From Investing Activities	'		'
Gold Line/Medford Acquisition	-138	[2]	'
Capital expenditures	-12.8		-26.4	[1]
Other	-0.9		3.9	[1]
Net Cash Used in Investing Activities	-151.7		-22.5	[1]
Cash Flows From Financing Activities	'		'
Net distributions to Phillips 66 from predecessors	-8.7		-36.9	[1]
Project prefunding from Phillips 66	2.2		3	[1]
Proceeds from issuance of common units	'		434.4	[1]
Offering costs	'		-30	[1]
Debt issuance costs	'		-0.1	[1]
Distributions to general partner associated with the Gold Line/Medford Acquisition	-262	[2]	'
Quarterly distributions to general partner—Phillips 66	-2.7		'
Other cash contributions from Phillips 66	3.6		'
Net Cash Provided by (Used in) Financing Activities	-326.1		370.4	[1]
Net Change in Cash and Cash Equivalents	-382.1		421.6	[1]
Cash and cash equivalents at beginning of period	425.1		'
Cash and Cash Equivalents at End of Period	43		421.6	[1]
Public [Member] | Common Units [Member]	'		'
Cash Flows From Financing Activities	'		'
Quarterly distributions to unitholders	-15.2		'
Phillips 66 [Member] | Non-public [Member] | Subordinated Units [Member]	'		'
Cash Flows From Financing Activities	'		'
Quarterly distributions to unitholders	-28.2		'
Phillips 66 [Member] | Non-public [Member] | Common Units [Member]	'		'
Cash Flows From Financing Activities	'		'
Quarterly distributions to unitholders	($15.10)		'
[1]	Prior-period financial information has been retrospectively adjusted for the Gold Line/Medford Acquisition.
[2]	See Note 10—Cash Flow Information, for additional information.

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Equity (USD $)

Total

General Partner [Member]

Common Units [Member]

Common Units [Member]

Common Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Net Investment [Member]

Predecessor [Member]

Predecessor [Member]

In Millions, unless otherwise specified

Public [Member]

Non-public [Member]

Non-public [Member]

Net Investment [Member]

Phillips 66 [Member]

Phillips 66 [Member]

Beginning Balance at Dec. 31, 2012

'

'

'

'

'

'

'

'

$241.10

$241.10

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

Net income attributable to predecessors

[1]

62.6

'

'

'

'

'

'

62.6

'

'

Net transfers to Phillips 66

[1]

'

'

'

'

'

'

'

'

-36.9

-36.9

Project prefunding from Phillips 66

'

'

'

'

'

'

'

'

3

3

Allocation of net investment to unitholders

'

11.1

'

'

44.6

'

96.1

-151.8

'

'

Proceeds from initial public offering, net of offering costs

404.4

'

'

404.4

'

'

'

'

'

'

Net income attributable to the Partnership

11.9

[1]

0.2

5.8

3.1

2.7

5.9

5.9

'

'

'

Ending Balance at Sep. 30, 2013

[1]

686.1

11.3

'

407.5

47.3

'

102

118

'

'

Beginning Balance at Jun. 30, 2013

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

Net income attributable to predecessors

15.7

'

'

'

'

'

'

'

'

'

Net income attributable to the Partnership

11.9

[1]

0.2

5.8

'

'

5.9

'

'

'

'

Ending Balance at Sep. 30, 2013

[1]

686.1

11.3

'

'

'

'

'

'

'

'

Beginning Balance at Dec. 31, 2013

'

11.5

'

'

'

'

'

'

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

Consideration paid for the Gold Line/Medford Acquisition

'

-560

'

'

'

'

'

'

'

'

Ending Balance at Mar. 01, 2014

'

'

'

'

'

'

'

'

'

'

Beginning Balance at Dec. 31, 2013

699.5

11.5

'

409.1

48.6

'

104.9

125.4

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

Net income attributable to predecessors

9.7

'

'

'

'

'

'

9.7

'

'

Net transfers to Phillips 66

-3.3

'

'

'

'

'

'

-3.3

'

'

Project prefunding from Phillips 66

2.2

'

'

'

'

'

'

2.2

'

'

Net income attributable to the Partnership

79.8

4.5

'

19.3

20.1

'

35.9

'

'

'

Contributions from Phillips 66 prior to the Gold Line/Medford Acquisition

4

'

'

'

'

'

'

4

'

'

Allocation of net investment of the Acquired Assets

'

138

'

'

'

'

'

-138

'

'

Consideration paid for the Gold Line/Medford Acquisition

-560

-560

'

'

'

'

'

'

'

'

Quarterly cash distributions to unitholders and general partner

-61.2

-2.7

'

-15.2

-15.1

'

-28.2

'

'

'

Other contributions from Phillips 66

2.3

2.3

'

'

'

'

'

'

'

'

Ending Balance at Sep. 30, 2014

173

-406.4

'

413.2

53.6

'

112.6

'

'

'

Beginning Balance at Jun. 30, 2014

'

'

'

'

'

'

'

'

'

'

Increase (Decrease) in Stockholders' Equity [Roll Forward]

'

'

'

'

'

'

'

'

'

'

Net income attributable to the Partnership

29.4

2

'

'

'

'

'

'

'

'

Ending Balance at Sep. 30, 2014

$173

($406.40)

'

'

'

'

'

'

'

'

[1]

Prior-period financial information has been retrospectively adjusted for the Gold Line/Medford Acquisition.

Business_and_Basis_of_Presenta

Business and Basis of Presentation	9 Months Ended
	Sep. 30, 2014
Business and Basis of Presentation [Abstract]	'
Business and Basis of Presentation	'
	Business and Basis of Presentation
	Unless otherwise stated or the context otherwise indicates, all references to “Phillips 66 Partners,” “the Partnership,” “us,” “our,” “we,” or similar expressions refer to Phillips 66 Partners LP, including its consolidated subsidiaries.
	Description of the Business
	We are a Delaware limited partnership formed on February 20, 2013, by Phillips 66 Company and Phillips 66 Partners GP LLC (our General Partner), both wholly owned subsidiaries of Phillips 66. On July 23, 2013, our common units began trading on the New York Stock Exchange under the symbol “PSXP,” and on July 26, 2013, we completed our initial public offering (the Offering) of 18,888,750 common units representing limited partner interests. On February 13, 2014, the Partnership entered into a Contribution, Conveyance and Assumption Agreement (the Contribution Agreement) with subsidiaries of Phillips 66 to acquire the Gold Line products system and the Medford spheres (collectively, the Acquired Assets) from certain of those subsidiaries (the Gold Line/Medford Acquisition). The transaction closed on February 28, 2014, with an effective date of March 1, 2014 (the Effective Date).
	Our assets consist of:
	•	Clifton Ridge crude system. A crude oil pipeline, terminal and storage system located in Sulphur, Louisiana, that is a primary source for delivery of crude oil to Phillips 66’s Lake Charles Refinery.
	•	Sweeny to Pasadena products system. A refined petroleum product pipeline, terminal and storage system extending from Phillips 66’s Sweeny Refinery in Old Ocean, Texas, to our refined petroleum product terminal in Pasadena, Texas, and ultimately connecting to the Explorer and Colonial refined petroleum product pipeline systems and other third-party pipeline and terminal systems. This system is the primary distribution outlet for diesel and gasoline produced at Phillips 66’s Sweeny Refinery.
	•	Hartford Connector products system. A refined petroleum product pipeline, terminal and storage system located in Hartford, Illinois, that distributes diesel and gasoline produced at the Wood River Refinery (a refinery owned by a joint venture between Phillips 66 and Cenovus Energy Inc.) to third-party pipeline and terminal systems, including the Explorer pipeline system.
	•	Gold Line products system. A refined petroleum product pipeline system that runs from the Phillips 66-operated refinery in Borger, Texas, to Cahokia, Illinois, with access to Phillips 66’s Ponca City Refinery, as well as two parallel lateral lines that run from Paola, Kansas, to Kansas City, Kansas. The system includes four terminals located at Wichita, Kansas; Kansas City, Kansas; Jefferson City, Missouri; and Cahokia, Illinois.
	•	Medford spheres. Two newly constructed refinery-grade propylene storage spheres located in Medford, Oklahoma, that commenced operations in March 2014. The Medford spheres provide an outlet for delivery of refinery-grade propylene from Phillips 66’s Ponca City Refinery, through interconnections with third-party pipelines, to Mont Belvieu, Texas.
	We generate revenue primarily by charging tariffs and fees for transporting crude oil and refined petroleum products through our pipelines, and terminaling and storing crude oil and refined petroleum products at our terminals and storage facilities. Since we do not own any of the crude oil and refined petroleum products that we handle and do not engage in the trading of crude oil and refined petroleum products, we have limited direct exposure to risks associated with fluctuating commodity prices, although these risks indirectly influence our activities and results of operations over the long term.
	Basis of Presentation
	The Gold Line/Medford Acquisition was a transfer of businesses between entities under common control, which requires it to be accounted for as if the transfer occurred at the beginning of the period of transfer, with prior periods retrospectively adjusted to furnish comparative information. Accordingly, the accompanying financial statements and related notes have been retrospectively adjusted to include the historical results and financial position of the Acquired Assets prior to the Effective Date. See Note 4—Gold Line/Medford Acquisition, for additional information.
	For periods prior to the Offering, the historical results of operations include our predecessor for accounting purposes. We refer to our pre-Offering predecessor and the operations of the Acquired Assets prior to their acquisition collectively as “our Predecessors.” The combined financial statements of our Predecessors were derived from the accounting records of Phillips 66, and reflect the combined historical results of operations, financial position and cash flows of our Predecessors as if such businesses had been combined for all periods presented.
	All intercompany transactions and accounts within our Predecessors have been eliminated. The assets and liabilities of our Predecessors in these financial statements have been reflected on a historical cost basis because the transfer of the Predecessors to us took place within the Phillips 66 consolidated group. The consolidated statement of income also includes expense allocations for certain functions performed by Phillips 66 and historically not allocated to our Predecessors, including allocations of general corporate expenses related to executive oversight, accounting, treasury, tax, legal, information technology and procurement; and operational support services such as engineering and logistics. These allocations were based primarily on relative values of net properties, plants and equipment (PP&E) and equity method investments, or pipeline miles. Our management believes the assumptions underlying the allocation of expenses from Phillips 66 were reasonable. Nevertheless, the financial results of our Predecessors may not include all of the actual expenses that would have been incurred had we been a stand-alone publicly traded partnership during the periods presented and may not reflect our actual results of operations, financial position and cash flows had we been a stand-alone publicly traded partnership during the periods prior to the Offering or the Gold Line/Medford Acquisition.
	All financial information presented for the periods after the Offering represents the consolidated results of operations, financial position and cash flows of the Partnership with retrospective adjustments of the combined results of operations, financial position and cash flows of the Acquired Assets. Accordingly:
	•	Our consolidated statement of income for the three months ended September 30, 2014, consists of the consolidated results of the Partnership. Our consolidated statement of income for the nine months ended September 30, 2014, consists of the combined results of the Acquired Assets and the consolidated results of the Partnership for the first two months of 2014, and the consolidated results of the Partnership for the remaining seven months. Our consolidated statement of income for the three months ended September 30, 2013, consists of the combined results of our pre-Offering predecessor for the period from July 1, 2013, through July 25, 2013, the consolidated results of the Partnership for the period from July 26, 2013, through September 30, 2013, and the combined results of the Acquired Assets for the period from July 1, 2013, through September 30, 2013. Our consolidated statement of income for the nine months ended September 30, 2013, consists of the combined results of our pre-Offering predecessor for the period from January 1, 2013, through July 25, 2013, the consolidated results of the Partnership for the period from July 26, 2013, through September 30, 2013, and the combined results of the Acquired Assets for the period from January 1, 2013, through September 30, 2013.
	•	Our consolidated balance sheet at September 30, 2014, consists of the consolidated balances of the Partnership, while at December 31, 2013, it consists of the consolidated balances of the Partnership and the combined balances of the Acquired Assets.
	•	Our consolidated statement of cash flows for the nine months ended September 30, 2014, consists of the combined results of the Acquired Assets and the consolidated results of the Partnership for the first two months of 2014, and the consolidated results of the Partnership for the remaining seven months. Our consolidated statement of cash flows for the nine months ended September 30, 2013, consists of the combined results of our pre-Offering predecessor for the period from January 1, 2013, through July 25, 2013, the consolidated results of the Partnership for the period from July 26, 2013, through September 30, 2013, and the combined results of the Acquired Assets for the period from January 1, 2013, through September 30, 2013.
	•	Our consolidated statement of changes in equity for the nine months ended September 30, 2014, consists of both the combined activity of the Acquired Assets and the consolidated activity of the Partnership prior to March 1, 2014, and the consolidated activity of the Partnership completed at and after March 1, 2014, through September 30, 2014. Our consolidated statement of changes in equity for the nine months ended September 30, 2013, consists of the combined activity of our pre-Offering predecessor from January 1, 2013, through July 25, 2013, the consolidated activity of the Partnership completed at and after July 26, 2013, through September 30, 2013, and the combined activity of the Acquired Assets from January 1, 2013, through September 30, 2013.

Interim_Financial_Information

Interim Financial Information	9 Months Ended
	Sep. 30, 2014
Interim Financial Information [Abstract]	'
Interim Financial Information	'
	Interim Financial Information
	The interim financial information presented in the financial statements included in this report is unaudited and includes all known accruals and adjustments necessary, in the opinion of management, for a fair presentation of our financial position, results of operations and cash flows for the periods presented. Unless otherwise specified, all such adjustments are of a normal and recurring nature. Certain notes and other information have been condensed or omitted from the interim financial statements included in this report. Therefore, these interim financial statements should be read in conjunction with the audited consolidated financial statements and notes included in our Current Report on Form 8-K filed with the Securities and Exchange Commission (SEC) on May 23, 2014. The results of operations for the three and nine months ended September 30, 2014, are not necessarily indicative of the results to be expected for the full year.

Changes_in_Accounting_Principl

Changes in Accounting Principles Changes in Accounting Principles	9 Months Ended
	Sep. 30, 2014
Changes in Accounting Principles [Abstract]	'
Changes in Accounting Principles	'
	Changes in Accounting Principles
	Effective July 1, 2014, we early adopted the Financial Accounting Standards Board (FASB) Accounting Standards Update (ASU) No. 2014-08, “Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity.” This ASU amends the definition of discontinued operations so that only disposals of components of an entity representing major strategic shifts that have a major effect on an entity’s operations and financial results will qualify for discontinued operations reporting. The ASU also requires additional disclosures about discontinued operations and individually material disposals that do not meet the definition of a discontinued operation. The adoption of this ASU did not have an effect on our consolidated financial statements.

Gold_LineMedford_Acquisition

Gold Line/Medford Acquisition	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
Gold Line/Medford Acquisition	'
	Gold Line/Medford Acquisition
	On February 13, 2014, we entered into the Contribution Agreement with subsidiaries of Phillips 66 to acquire the Gold Line/Medford Assets from certain of those subsidiaries for total consideration of $700 million, consisting of $400 million in cash; the issuance of 3,530,595 common units of the Partnership to Phillips 66 Company and the issuance of 72,053 general partner units of the Partnership to our General Partner to maintain its 2 percent general partner interest in the Partnership, with an aggregate fair value of the common and general partner units of $140 million at February 13, 2014; and the assumption by the Partnership of a 5-year, $160 million note payable to a subsidiary of Phillips 66. The Gold Line/Medford Acquisition closed on February 28, 2014, with an effective date of March 1, 2014. See Note 10—Cash Flow Information, for additional information on the accounting treatment of the Gold Line/Medford Acquisition. Total transaction costs of $1.8 million associated with the Gold Line/Medford Acquisition were expensed as incurred. In connection with the Gold Line/Medford Acquisition, we entered into various commercial agreements with Phillips 66 and amended the omnibus agreement and the operational services agreement with Phillips 66. See Note 11—Related Party Transactions, for a summary of the terms of these agreements.
	After this acquisition, Phillips 66 owns:
	•	19,858,957 common units and 35,217,112 subordinated units, representing an aggregate 73.0 percent limited partner interest.
	•	1,509,486 general partner units, representing a 2.0 percent general partner interest.
	•	All of the incentive distribution rights (IDRs).
	Because the Gold Line/Medford Acquisition was considered a transfer of businesses between entities under common control, the Acquired Assets were transferred at historical carrying value, which was $138 million at February 28, 2014. Our historical financial statements have been retrospectively adjusted to reflect the results of operations, financial position, and cash flows of the Acquired Assets as if we owned the Acquired Assets for all periods presented.
	The following tables present our results of operations and financial position giving effect to the Gold Line/Medford Acquisition. The combined results of the Acquired Assets prior to the Effective Date are included in “Acquired Assets Predecessor.” The consolidated results of the Acquired Assets after the Effective Date are included in “Phillips 66 Partners LP.”
		Millions of Dollars
		Nine Months Ended September 30, 2014
		Phillips 66 Partners LP		Acquired Assets Predecessor	Consolidated Results
	Revenues
	Transportation and terminaling services—related parties	$	142.5	15.2	157.7
	Transportation and terminaling services—third parties	3.7		0.7	4.4
	Other income	0.1		—	0.1
	Total revenues	146.3		15.9	162.2
	Costs and Expenses
	Operating and maintenance expenses	33.8		3.3	37.1
	Depreciation	10.3		1.2	11.5
	General and administrative expenses	15.9		1.1	17
	Taxes other than income taxes	2.7		0.6	3.3
	Interest and debt expense	3.2		—	3.2
	Total costs and expenses	65.9		6.2	72.1
	Income before income taxes	80.4		9.7	90.1
	Provision for income taxes	0.6		—	0.6
	Net Income	79.8		9.7	89.5
	Less: Net income attributable to predecessors	—		9.7	9.7
	Net Income Attributable to the Partnership	$	79.8	—	79.8
		Millions of Dollars
		Three Months Ended September 30, 2013
		Phillips 66 Partners LP		Acquired Assets Predecessor	Consolidated Results
	Revenues
	Transportation and terminaling services—related parties	$	29.5	19.2	48.7
	Transportation and terminaling services—third parties	—		1.7	1.7
	Other income	0.1		—	0.1
	Total revenues	29.6		20.9	50.5
	Costs and Expenses
	Operating and maintenance expenses	7.5		6.7	14.2
	Depreciation	1.6		1.8	3.4
	General and administrative expenses	2.5		1.4	3.9
	Taxes other than income taxes	0.4		0.7	1.1
	Interest and debt expense	0.1		—	0.1
	Total costs and expenses	12.1		10.6	22.7
	Income before income taxes	17.5		10.3	27.8
	Provision for income taxes	0.2		—	0.2
	Net Income	17.3		10.3	27.6
	Less: Net income attributable to predecessors	5.4		10.3	15.7
	Net Income Attributable to the Partnership	$	11.9	—	11.9
		Millions of Dollars
		Nine Months Ended September 30, 2013
		Phillips 66 Partners LP		Acquired Assets Predecessor	Consolidated Results
	Revenues
	Transportation and terminaling services—related parties	$	76.6	57.5	134.1
	Transportation and terminaling services—third parties	0.1		3.8	3.9
	Other income	0.1		—	0.1
	Total revenues	76.8		61.3	138.1
	Costs and Expenses
	Operating and maintenance expenses	19.7		18.7	38.4
	Depreciation	4.7		5.3	10
	General and administrative expenses	6.9		4.3	11.2
	Taxes other than income taxes	1.3		2.2	3.5
	Interest and debt expense	0.1		—	0.1
	Total costs and expenses	32.7		30.5	63.2
Income before income taxes	44.1		30.8	74.9
Provision for income taxes	0.4		—	0.4
Net Income	43.7		30.8	74.5
Less: Net income attributable to predecessors	31.8		30.8	62.6
Net Income Attributable to the Partnership	$	11.9	—	11.9
	Millions of Dollars
	31-Dec-13
	Phillips 66 Partners LP		Acquired Assets Predecessor	Consolidated Results
Assets
Cash and cash equivalents	$	425.1	—	425.1
Accounts receivable—related parties	11.3		—	11.3
Accounts receivable—third parties	0.1		0.5	0.6
Materials and supplies	0.6		1.4	2
Other current assets	2.3		—	2.3
Total Current Assets	439.4		1.9	441.3
Net properties, plants and equipment	135.9		135.3	271.2
Goodwill	2.5		—	2.5
Deferred rentals—related parties	6.4		—	6.4
Total Assets	$	584.2	137.2	721.4
Liabilities
Accounts payable—related parties	$	5.2	—	5.2
Accounts payable—third parties	3		5	8
Payroll and benefits payable	—		0.1	0.1
Accrued property and other taxes	1		1.3	2.3
Current portion of accrued environmental costs	—		2	2
Other current liabilities	0.4		—	0.4
Total Current Liabilities	9.6		8.4	18
Asset retirement obligations	0.4		2	2.4
Accrued environmental costs	—		1.4	1.4
Deferred income taxes	0.1		—	0.1
Total Liabilities	10.1		11.8	21.9
Equity
Net investment—predecessors	—		125.4	125.4
Common unitholders—public	409.1		—	409.1
Common unitholder—Phillips 66	48.6		—	48.6
Subordinated unitholder—Phillips 66	104.9		—	104.9
General partner—Phillips 66	11.5		—	11.5
Total Equity	574.1		125.4	699.5
Total Liabilities and Equity	$	584.2	137.2	721.4

Properties_Plants_and_Equipmen

Properties, Plants and Equipment	9 Months Ended
	Sep. 30, 2014
Property, Plant and Equipment [Abstract]	'
Properties, Plants and Equipment	'
	Properties, Plants and Equipment
	Our investment in PP&E, with the associated accumulated depreciation, was:
		Millions of Dollars
		September 30			31-Dec
		2014			2013
	Cost:
	Land	$	5		5
	Buildings and improvements	16.1			15.6
	Pipelines and related assets	151.3			150.7
	Terminals and related assets	333.1			286.5
	Construction-in-progress	8.6			43
	Gross PP&E	514.1			500.8
	Less: Accumulated depreciation	(240.2		)	(229.6	)
	Net PP&E	$	273.9		271.2

Debt

Debt	9 Months Ended
	Sep. 30, 2014
Debt Disclosure [Abstract]	'
Debt	'
	Debt
	On March 1, 2014, we entered into an Assignment, Assumption and Modification of Note (the Assumption Agreement) with certain subsidiaries of Phillips 66. Pursuant to the Assumption Agreement, we assumed a 5-year, $160 million note payable to a subsidiary of Phillips 66 that bears interest at a fixed rate of 3 percent per annum. Interest on the note is payable quarterly, and all principal and accrued interest is due and payable at maturity on February 28, 2019. At September 30, 2014, the carrying value and fair value of this note were $160.0 million and $163.5 million, respectively. We calculated the fair value using a discounted cash flow model, with a discount rate that approximates rates we observed in the market for similar entities with debts of comparable durations. We increased this discount rate by 20 basis points to reflect a structuring fee. Given the methodology employed, we classified this as Level 2 in the fair value hierarchy.

Net_Income_Per_Limited_Partner

Net Income Per Limited Partner Unit	9 Months Ended
	Sep. 30, 2014
Partners' Capital Notes [Abstract]	'
Net Income Per Limited Partner Unit	'
	Net Income Per Limited Partner Unit
	Net income per unit applicable to common units and to subordinated units is computed by dividing the respective limited partners’ interest in net income attributable to the Partnership by the weighted average number of common units and subordinated units, respectively, outstanding for the period. Because we have more than one class of participating securities, we use the two-class method to calculate the net income per unit applicable to limited partners. The classes of participating securities include common units, subordinated units, general partner units, and IDRs. Basic and diluted net income per unit are the same because we do not have potentially dilutive units outstanding for the periods presented.
		Millions of Dollars
		Three Months Ended September 30				Nine Months Ended September 30
		2014		2013		2014	2013
	Net income attributable to the Partnership	$	29.4	11.9		79.8	11.9
	Less: General partner’s distributions declared (including IDRs)*	1.9		0.2		4.3	0.2
	Limited partners’ distributions declared on common units*	12.3		5.4		34.6	5.4
	Limited partner’s distributions declared on subordinated units*	11.1		5.5		31.4	5.5
	Distributions less than net income attributable to the Partnership	$	4.1	0.8		9.5	0.8
	*Distributions declared attributable to the indicated periods.
		General Partner (including IDRs)		Limited Partners’ Common Units		Limited Partner’s Subordinated Units	Total
	Three Months Ended September 30, 2014
	Net income attributable to the Partnership (millions):
	Distribution declared	$	1.9	12.3		11.1	25.3
	Distribution less than net income attributable to the Partnership	0.1		2		2	4.1
	Net income attributable to the Partnership	$	2	14.3		13.1	29.4
	Weighted average units outstanding:
	Basic	1,509,486		38,747,707		35,217,112	75,474,305
	Diluted	1,509,486		38,747,707		35,217,112	75,474,305
	Net income per limited partner unit (dollars):
	Basic			$	0.37	0.37
	Diluted			0.37		0.37
	Three Months Ended September 30, 2013
	Net income attributable to the Partnership (millions):
	Distribution declared*	$	0.2	5.4		5.5	11.1
	Distribution less than net income attributable to the Partnership	—		0.4		0.4	0.8
	Net income attributable to the Partnership	$	0.2	5.8		5.9	11.9
	Weighted average units outstanding:
	Basic	1,437,433		35,217,112		35,217,112	71,871,657
	Diluted	1,437,433		35,217,112		35,217,112	71,871,657
	Net income per limited partner unit (dollars):
	Basic			$	0.17	0.17
	Diluted			0.17		0.17
	*Common and subordinated unitholders, as a group, each received distributions totaling $5.45 million. Differences in the above table are due to rounding impacts.
		General Partner (including IDRs)		Limited Partners’ Common Units		Limited Partner’s Subordinated Units	Total
	Nine Months Ended September 30, 2014
	Net income attributable to the Partnership (millions):
	Distributions declared	$	4.3	34.6		31.4	70.3
	Distributions less than net income attributable to the Partnership	0.2		4.8		4.5	9.5
	Net income attributable to the Partnership	$	4.5	39.4		35.9	79.8
	Weighted average units outstanding:
	Basic	1,493,914		37,984,685		35,217,112	74,695,711
	Diluted	1,493,914		37,984,685		35,217,112	74,695,711
	Net income per limited partner unit (dollars):
	Basic			$	1.04	1.02
	Diluted			1.04		1.02
	Nine Months Ended September 30, 2013
	Net income attributable to the Partnership (millions):
	Distribution declared*	$	0.2	5.4		5.5	11.1
	Distribution less than net income attributable to the Partnership	—		0.4		0.4	0.8
	Net income attributable to the Partnership	$	0.2	5.8		5.9	11.9
	Weighted average units outstanding:
	Basic	1,437,433		35,217,112		35,217,112	71,871,657
	Diluted	1,437,433		35,217,112		35,217,112	71,871,657
	Net income per limited partner unit (dollars):
	Basic			$	0.17	0.17
	Diluted			0.17		0.17
	*Common and subordinated unitholders, as a group, each received distributions totaling $5.45 million. Differences in the above table are due to rounding impacts.
	On October 22, 2014, the Board of Directors of our General Partner declared a quarterly cash distribution of $0.3168 per limited partner unit which, combined with distributions to our General Partner, resulted in total distributions of $25.3 million attributable to the third quarter of 2014. This distribution is payable November 13, 2014, to unitholders of record as of November 4, 2014.

Contingencies

Contingencies	9 Months Ended
	Sep. 30, 2014
Contingencies [Abstract]	'
Contingencies	'
	From time to time, lawsuits involving a variety of claims that arise in the ordinary course of business may be filed against us. We also may be required to remove or mitigate the effects on the environment of the placement, storage, disposal or release of certain chemical, mineral and petroleum substances at various sites. We regularly assess the need for accounting recognition or disclosure of these contingencies. In the case of all known contingencies (other than those related to income taxes), we accrue a liability when the loss is probable and the amount is reasonably estimable. If a range of amounts can be reasonably estimated and no amount within the range is a better estimate than any other amount, then the minimum of the range is accrued. We do not reduce these liabilities for potential insurance or third-party recoveries. If applicable, we accrue receivables for probable insurance or other third-party recoveries. In the case of income-tax-related contingencies, we use a cumulative probability-weighted loss accrual in cases where sustaining a tax position is less than certain.
	Based on currently available information, we believe it is remote that future costs related to known contingent liability exposures will exceed current accruals by an amount that would have a material adverse impact on our consolidated financial statements. As we learn new facts concerning contingencies, we reassess our position both with respect to accrued liabilities and other potential exposures. Estimates particularly sensitive to future changes include any contingent liabilities recorded for environmental remediation, tax and legal matters. Estimated future environmental remediation costs are subject to change due to such factors as the uncertain magnitude of cleanup costs, the unknown time and extent of such remedial actions that may be required, and the determination of our liability in proportion to that of other potentially responsible parties. Estimated future costs related to tax and legal matters are subject to change as events evolve and as additional information becomes available during the administrative and litigation processes.
	Environmental
	We are subject to federal, state and local environmental laws and regulations. We record accruals for environmental liabilities based on management’s best estimates, using all information that is available at the time. We measure estimates and base liabilities on currently available facts, existing technology, and presently enacted laws and regulations, taking into account stakeholder and business considerations. When measuring environmental liabilities, we also consider our and Phillips 66’s prior experience in remediation of contaminated sites, other companies’ cleanup experience, and data released by the U.S. Environmental Protection Agency or other organizations. We consider unasserted claims in our determination of environmental liabilities, and we accrue them in the period they are both probable and reasonably estimable. At December 31, 2013, our Predecessors recorded a total environmental accrual of $3.4 million associated with the Acquired Assets. Pursuant to the terms of the Contribution Agreement, Phillips 66 assumed the responsibility for these liabilities arising prior to their contribution to us; therefore we reflected no liabilities associated with them after the Effective Date. As of September 30, 2014, we did not have any material environmental accruals. In the future, we may be involved in environmental assessments, cleanups and proceedings.
	Legal Proceedings
	Under our amended omnibus agreement, Phillips 66 provides certain services for our benefit, including legal support services, and we pay an operational and administrative support fee for these services. Phillips 66’s legal organization applies its knowledge, experience and professional judgment to the specific characteristics of our cases, employing a litigation management process to manage and monitor the legal proceedings against us. The process facilitates the early evaluation and quantification of potential exposures in individual cases and enables tracking of those cases that have been scheduled for trial and/or mediation. Based on professional judgment and experience in using these litigation management tools and available information about current developments in all our cases, Phillips 66’s legal organization regularly assesses the adequacy of current accruals and determines if adjustment of existing accruals, or establishment of new accruals, is required. As of September 30, 2014, and December 31, 2013, we did not have any material accrued contingent liabilities associated with litigation matters.
	Indemnification
	Under our amended omnibus agreement, Phillips 66 will indemnify us for certain environmental liabilities, tax liabilities, and litigation and other matters attributable to the ownership or operation of the assets contributed to us in connection with the Offering (the Initial Assets) and which arose prior to the closing of the Offering. Indemnification for any unknown environmental liabilities provided therein is limited to liabilities due to occurrences prior to the closing of the Offering and that are identified before the fifth anniversary of the closing of the Offering, subject to an aggregate deductible of $0.1 million before we are entitled to indemnification. Indemnification for litigation matters provided therein (other than legal actions pending at the closing of the Offering) is subject to an aggregate deductible of $0.2 million before we are entitled to indemnification. Phillips 66 will also indemnify us under our amended omnibus agreement for failure to obtain certain consents, licenses and permits necessary to conduct our business, including the cost of curing any such condition, in each case that is identified prior to the fifth anniversary of the closing of the Offering, subject to an aggregate deductible of $0.2 million before we are entitled to indemnification. We have agreed to indemnify Phillips 66 for events and conditions associated with the ownership or operation of the Initial Assets that occur on or after the closing of the Offering and for certain environmental liabilities related to the Initial Assets to the extent Phillips 66 is not required to indemnify us.
	Excluded Liabilities of the Acquired Assets
	Pursuant to the terms of the Contribution Agreement, Phillips 66 assumed the responsibility for any liabilities arising out of or attributable to the ownership or operation of the Acquired Assets, or other activities occurring in connection with and attributable to the ownership or operation of the Acquired Assets, prior to the Effective Date, including the liabilities associated with the construction costs of the Medford spheres. We have assumed, and have agreed to pay, discharge and perform as and when due, all liabilities arising out of or attributable to the ownership or operation of the Acquired Assets, or other activities occurring in connection with and attributable to the ownership or operation of the Acquired Assets, from and after the Effective Date.

Employee_Benefit_Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]	'
Employee Benefit Plans	'
	Employee Benefit Plans
	Employees of Phillips 66 who directly or indirectly support our operations participate in the pension, postretirement health insurance, and defined contribution benefit plans sponsored by Phillips 66, which includes other subsidiaries of Phillips 66. For the three and nine months ended September 30, 2014, the pension, postretirement health insurance and defined contribution benefit plan costs of $0.1 million and $0.5 million, respectively, consisted of the costs allocated to the Acquired Assets from Phillips 66 prior to March 1, 2014, and the costs of Phillips 66’s employees who are fully dedicated to supporting our business for the three and nine months ended September 30, 2014. For the three and nine months ended September 30, 2013, these costs, totaling $0.6 million and $2.3 million, respectively, consisted of the costs allocated to our Predecessors from Phillips 66 and the costs of Phillips 66’s employees who are fully dedicated to supporting our business. These costs are included in either “General and administrative expenses” or “Operating and maintenance expenses” on our consolidated statement of income, depending on the nature of the employee’s role in our operations.

Cash_Flow_Information

Cash Flow Information	9 Months Ended
	Sep. 30, 2014
Cash Flow Information [Abstract]	'
Cash Flow Information	'
	Cash Flow Information
	The Gold Line/Medford Acquisition had both cash and noncash elements.  We attributed $138 million of the total $400 million cash consideration paid to the historical book value of the net assets acquired (an investing cash outflow).  The remaining $262 million of cash consideration was deemed a distribution to our General Partner (a financing cash outflow).  The assumption of the $160 million note payable was deemed a noncash distribution to our General Partner (noncash financing activity).  Together, the cash consideration and the assumption of the note payable resulted in a $560 million reduction in our General Partner’s capital balance.  The common and general partner units issued to Phillips 66 in the transaction were assigned no value, because the cash consideration and note payable assumption exceeded the historical book value of the Acquired Assets.  Accordingly, the units issued had no impact on partner capital balances, other than changing ownership percentages.
		Millions of Dollars
		Nine Months Ended
		30-Sep
		2014		2013
	Noncash Investing and Financing Activities
	Certain liabilities of the Acquired Assets retained by Phillips 66*	$	5.4	—
	Note payable—related parties associated with the Gold Line/Medford Acquisition	160		—
	The issuance of common and general partner units to Phillips 66	—		—
	PP&E transfer from Phillips 66**	1		—
	Environmental and legal cost contribution from Phillips 66***	0.7		—
	Cash Payments
	Interest	$	1.9	0.2
	Income taxes****	0.2		—
	* Certain liabilities of the Acquired Assets were retained by Phillips 66, pursuant to the terms of the Contribution Agreement. See Note 8—Contingencies, for additional information on these excluded liabilities associated with the Acquired Assets.
	** Capital expenditures on the Medford spheres recorded after the Effective Date were transferred to us from Phillips 66 as a capital contribution from our General Partner.
	*** Certain environmental and legal costs associated with our assets were allocated from and paid directly by Phillips 66. These costs were related to the accrued environmental and legal liabilities retained by Phillips 66 pursuant to the amended omnibus agreement and the Contribution Agreement. These costs were deemed a noncash contribution from Phillips 66.
	**** Excludes our share of cash tax payments made directly by Phillips 66 prior to the Offering on July 26, 2013, and the Gold Line/Medford Acquisition on March 1, 2014, in respect of the Acquired Assets.

Related_Party_Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2014
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	Related Party Transactions
	Commercial Agreements
	In connection with the Offering and the Gold Line/Medford Acquisition, we entered into multiple transportation services agreements and terminal services agreements with Phillips 66 and amended an existing transportation services agreement with Phillips 66. Under these long-term, fee-based agreements, we provide transportation, terminaling and storage services to Phillips 66, and Phillips 66 commits to provide us with minimum quarterly throughput volumes of crude oil and refined petroleum products.
	These agreements with Phillips 66 include:
	•	A 10-year transportation services agreement under which we charge Phillips 66 for transporting crude oil on our Clifton Ridge to Lake Charles refinery pipeline, our Pecan Grove to Clifton Ridge pipeline and our Shell to Clifton Ridge pipeline.
	•	A 10-year transportation services agreement under which we charge Phillips 66 for transporting diesel, gasoline and other refined petroleum products on our two 60-mile Sweeny to Pasadena pipelines.
	•	A 23-year throughput and deficiency agreement under which we charge Phillips 66 for transporting gasoline, diesel, jet fuel and other refined petroleum products on our Wood River to Hartford pipeline and our Hartford to Explorer pipeline.
	•	A 10-year transportation services agreement under which we charge Phillips 66 for transporting refined petroleum products along four routes on the Gold Line products system.
	•	A 5-year terminal services agreement under which we charge Phillips 66 for offloading ships and barges at our Clifton Ridge ship dock and Pecan Grove barge dock and for unloading trucks and storing crude oil at our Clifton Ridge terminal.
	•	A 5-year terminal services agreement under which we charge Phillips 66 for providing terminaling services at our Pasadena and Hartford terminals and at our Hartford barge dock.
	•	A 5-year terminal services agreement under which we charge Phillips 66 for receiving refined petroleum products, handling and storing such refined petroleum products, and delivering such refined petroleum products into pipelines and transport trucks at our terminals located in Wichita, Kansas; Kansas City, Kansas; Jefferson City, Missouri; and Cahokia, Illinois.
	Other than our Hartford Connector throughput and deficiency agreement (Hartford Connector T&D), each of our transportation services agreements includes a 10-year initial term, and Phillips 66 has the option to renew each agreement for up to one or two additional 5-year terms. Our Hartford Connector T&D, which was amended in connection with the Offering, has a 23-year term that began in January 2008 and will expire on December 31, 2030. Each of our terminal services agreements includes a 5-year initial term, and Phillips 66 has the option to renew each agreement for up to two or three additional 5-year terms.
	Under each of our transportation services agreements, if Phillips 66 fails to transport its minimum throughput volume during any quarter, then Phillips 66 will pay us a deficiency payment based on the calculation described in the agreement. If the minimum capacity of the pipeline(s) falls below the level of Phillips 66’s commitment at any time (other than outages caused by our planned maintenance) or if capacity on the pipeline(s) is required to be allocated among shippers as a result of volume nominations exceeding available capacity, Phillips 66’s minimum throughput commitment may be proportionately reduced until such time that the available capacity is sufficient to fulfill Phillips 66’s minimum volume commitments. We may elect to adjust our tariffs on an annual basis and the new tariffs become effective on July 1 of each year. For the transportation services agreement for the Gold Line products system, we may elect to adjust our tariff beginning July 1, 2015. Under each of our transportation services agreements other than our Hartford Connector T&D, if we agree to make any expenditures at Phillips 66’s request, Phillips 66 will reimburse us for, or we will have the right under certain circumstances to file for an increased tariff rate to recover, the actual amount we incur for such expenditures.
	Under our terminal services agreements, Phillips 66 is obligated to throughput or store minimum volumes of crude oil and refined petroleum products and pay us terminaling fees, as well as fees for providing related ancillary services (such as ethanol and biodiesel blending and additive injection) at our terminals. If Phillips 66 fails to meet its minimum volume commitments on certain terminaling services during any quarter, then Phillips 66 will pay us a deficiency payment based on the calculation described in each agreement. We may adjust our per-barrel fees annually on January 1 of each year.
	These transportation services and terminal services agreements include provisions that permit Phillips 66 to suspend, reduce or terminate its obligations under the applicable agreement if certain events occur. Under all of our commercial agreements other than our Hartford Connector T&D, these events include Phillips 66 deciding to completely suspend refining operations at a refinery that is supported by our assets for at least twelve consecutive months, unless it publicly announces its intent to resume those operations prior to the expiration of the 12-month notice period. Under all of our commercial agreements, these events also include certain force majeure events that would prevent us or Phillips 66 from performing our respective obligations under the applicable agreement.
	In connection with the Offering, we entered into two storage and stevedoring services agreements with Phillips 66. Under these agreements, we provide Phillips 66 certain storage, stevedoring, sampling and testing services and such other services as we and Phillips 66 may mutually agree upon from time to time, and Phillips 66 commits to provide us with minimum storage volumes of lubricant base stocks at our Hartford and Pecan Grove terminals. We also entered into a storage services agreement with Phillips 66. Under this agreement, we will provide certain storage, sampling and testing services and such other services as we and Phillips 66 may mutually agree upon from time to time. Phillips 66 commits to provide us with minimum storage volumes at our Hartford terminal.
	In connection with the Gold Line/Medford Acquisition, we entered into several storage services agreements and one origination services agreement with Phillips 66, including:
	•	A storage services agreement (storage on the Gold Line products system). Pursuant to this agreement, we charge fees to Phillips 66 for storing certain identified petroleum products in storage tanks located in Wichita, Kansas; Kansas City, Kansas; and Cahokia, Illinois. The fees payable by Phillips 66 to us are subject to adjustment each year beginning on January 1, 2015, based on the Producer Price Index (PPI) for finished goods. This agreement has a primary term of 5 years and automatically extends for up to two additional 5-year periods, unless terminated by either party.
	•	A storage services agreement (storage at the Medford spheres). Pursuant to this agreement, we charge fees to Phillips 66 for receiving and storing natural gas liquids and refinery-grade propylene in the Medford spheres. The fees payable by Phillips 66 to us are subject to adjustment each year beginning on January 1, 2015, based on the PPI for finished goods. This agreement has a primary term of 10 years and automatically extends for up to two additional 5-year periods unless terminated by either party.
	•	An origination services agreement with Phillips 66. Pursuant to this agreement, Phillips 66 charges fees to us for the provision of certain operational services by Phillips 66 to us in connection with the origination of petroleum products movements on the Gold Line products system. The monthly fee is subject to adjustment each year beginning in 2016 based on the PPI for finished goods. This agreement has a primary term of 10 years and automatically extends for successive 5-year renewal terms, unless terminated by either party.
	With respect to periods prior to the Offering or the Gold Line/Medford Acquisition in respect of the Acquired Assets, our Predecessors were part of the consolidated operations of Phillips 66, and substantially all of our Predecessors’ revenues were derived from transactions with Phillips 66 and its affiliates. The contractual rates used for these revenue transactions may be materially different than rates we might have received had they been transacted with third parties.
	Amended Operational Services Agreement
	In connection with the Offering, we entered into an operational services agreement with Phillips 66. Under this agreement, we reimburse Phillips 66 for providing certain operational services to us in support of our pipelines, terminaling and storage facilities. These services include routine and emergency maintenance and repair services, routine operational activities, routine administrative services, construction and related services and such other services as we and Phillips 66 may mutually agree upon from time to time. The agreement has an initial term of five years and will continue in full force and effect thereafter unless terminated by either party. In connection with the Gold Line/Medford Acquisition, we entered into the first amendment to the operational services agreement with Phillips 66. Pursuant to this amendment, the services provided to us by Phillips 66 under the operational services agreement are also provided in support of the Acquired Assets.
	Amended Omnibus Agreement
	In connection with the Offering, we entered into an omnibus agreement with Phillips 66, certain of its subsidiaries and our General Partner. This agreement addresses our payment of an annual operating and administrative support fee and our obligation to reimburse Phillips 66 for all other direct or allocated costs and expenses incurred by Phillips 66 in providing general and administrative services. It also addresses our right of first offer to acquire Phillips 66’s direct one-third equity interest in each of DCP Sand Hills Pipeline, LLC and DCP Southern Hills Pipeline, LLC. Additionally, the omnibus agreement addresses Phillips 66’s indemnification to us and our indemnification to Phillips 66 for certain environmental and other liabilities related to the Initial Assets, and the prefunding of certain projects by Phillips 66. Further, it addresses the granting of a license from Phillips 66 to us with respect to the use of certain Phillips 66 trademarks. In connection with the Gold Line/Medford Acquisition, we entered into the first amendment to the omnibus agreement with Phillips 66. Pursuant to this amendment, Phillips 66 provides for additional services to us in connection with the Acquired Assets, and the monthly operational and administrative support fee payable by us to Phillips 66 was increased.
	Tax Sharing Agreement
	In connection with the Offering, we entered into a tax sharing agreement with Phillips 66 pursuant to which we will reimburse Phillips 66 for our share of state and local income and other taxes incurred by Phillips 66 as a result of our results of operations being included in a combined or consolidated tax return filed by Phillips 66 with respect to taxable periods including or beginning on the closing date of the Offering. The amount of any such reimbursement will be limited to the tax that we (and our subsidiaries) would have paid had we not been included in a combined group with Phillips 66. Phillips 66 may use its tax attributes to cause its combined or consolidated group, of which we may be a member for this purpose, to owe no tax. However, we would nevertheless reimburse Phillips 66 for the tax we would have owed had the attributes not been available or used for our benefit, even though Phillips 66 had no cash expense for that period.
	Related Party Transactions
	Significant related-party transactions included in operating and maintenance expenses, general and administrative expenses, and interest and debt expense were:
		Millions of Dollars
		Three Months Ended			Nine Months Ended
		30-Sep			30-Sep
		2014		2013*	2014	2013*
	Operating and maintenance expenses	$	7.9	6.4	23	17.1
	General and administrative expenses	4.5		3.9	14.1	11.2
	Interest and debt expense	1.2		—	2.8	—
	Total	$	13.6	10.3	39.9	28.3
	*Prior-period financial information has been retrospectively adjusted for the Gold Line/Medford Acquisition.
	We pay Phillips 66 a monthly operational and administrative support fee under the terms of our amended omnibus agreement, initially in the amount of $1.1 million from July 26, 2013, through February 28, 2014, and then $2.3 million beginning March 1, 2014. The operational and administrative support fee is for the provision of certain services, including: executive services; financial and administrative services (including treasury and accounting); information technology; legal services; corporate health, safety and environmental services; facility services; human resources services; procurement services; corporate engineering services, including asset integrity and regulatory services; logistical services; asset oversight, such as operational management and supervision; business development services; investor relations; tax matters; and public company reporting services. We also reimburse Phillips 66 for all other direct or allocated costs incurred on our behalf, pursuant to the terms of our amended omnibus agreement. Under our amended operational services agreement, we reimburse Phillips 66 for the provision of certain operational services to us in support of our pipelines and terminaling and storage facilities. Additionally, we pay Phillips 66 for insurance services provided to us. Operating and maintenance expenses also include volumetric gain/loss associated with volumes transported by Phillips 66. The classification of these charges between operating and maintenance expenses and general and administrative expenses is based on the functional nature of the services being performed for our operations.
	In connection with the Gold Line/Medford Acquisition, we assumed a 5-year, $160 million note payable to a subsidiary of Phillips 66. See Note 6—Debt, for additional information. Interest and debt expense includes related-party interest expense associated with the note payable.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	We are not a taxable entity for U.S. federal income tax purposes or for the majority of states that impose an income tax. Taxes on our net income generally are borne by our partners through the allocation of taxable income. Our income tax provision results from state laws that apply to entities organized as partnerships, primarily Texas and Illinois.
	Our provision for income taxes was $0.1 million and $0.6 million for the three- and nine-month periods ended September 30, 2014, respectively, compared with $0.2 million and $0.4 million for the corresponding periods of 2013. Our effective tax rate was 0.3 percent and 0.7 percent for the three- and nine-month periods ended September 30, 2014, respectively, compared with 0.7 percent and 0.5 percent for the three- and nine-month periods ended September 30, 2013. The decrease in the effective tax rate for the third quarter of 2014 is primarily attributable to the recognition of deferred tax liabilities associated with the Offering during the third quarter of 2013.  The increase in the effective tax rate for the first nine months of 2014 resulted from the deferred tax impact of a change in methodology used to calculate the Texas margin tax associated with the Gold Line/Medford Acquisition.

New_Accounting_Standards

New Accounting Standards	9 Months Ended
	Sep. 30, 2014
New Accounting Standards [Abstract]	'
New Accounting Standards	'
	New Accounting Standards
	In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606).”  The new standard converged guidance on recognizing revenues in contracts with customers under accounting principles generally accepted in the United States and International Financial Reporting Standards.  This ASU is intended to improve comparability of revenue recognition practices across entities, industries, jurisdictions and capital markets.  ASU 2014-09 is effective for annual and quarterly reporting periods of public entities beginning after December 15, 2016. Early application for public entities is not permitted.  We are currently evaluating the provisions of ASU 2014-09 and assessing the impact, if any, it may have on our financial position and results of operations.

Subsequent_Events_Subsequent_E

Subsequent Events Subsequent Events	9 Months Ended
	Sep. 30, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	Subsequent Events
	On October 22, 2014, we entered into an agreement to acquire certain logistics assets from Phillips 66 for total consideration of $340 million. These assets consist of two new crude oil rail-unloading facilities located at or adjacent to Phillips 66’s Bayway and Ferndale refineries, and the Cross-Channel Connector pipeline assets near our Pasadena terminal. We expect to finance the acquisition with the borrowing of $28 million under our revolving credit facility, the assumption of a 5-year, $244 million note payable to a subsidiary of Phillips 66, and the issuance to Phillips 66 of 1,066,412 common and 21,764 general partner units valued at $68 million. In connection with the closing of this transaction, we will enter into 10-year terminal services agreements with Phillips 66 for 100 percent of the available capacity of the rail-unloading facilities. The transaction is anticipated to close in December 2014.

Business_and_Basis_of_Presenta1

Business and Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2014
Business and Basis of Presentation [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The Gold Line/Medford Acquisition was a transfer of businesses between entities under common control, which requires it to be accounted for as if the transfer occurred at the beginning of the period of transfer, with prior periods retrospectively adjusted to furnish comparative information. Accordingly, the accompanying financial statements and related notes have been retrospectively adjusted to include the historical results and financial position of the Acquired Assets prior to the Effective Date. See Note 4—Gold Line/Medford Acquisition, for additional information.
	For periods prior to the Offering, the historical results of operations include our predecessor for accounting purposes. We refer to our pre-Offering predecessor and the operations of the Acquired Assets prior to their acquisition collectively as “our Predecessors.” The combined financial statements of our Predecessors were derived from the accounting records of Phillips 66, and reflect the combined historical results of operations, financial position and cash flows of our Predecessors as if such businesses had been combined for all periods presented.
	All intercompany transactions and accounts within our Predecessors have been eliminated. The assets and liabilities of our Predecessors in these financial statements have been reflected on a historical cost basis because the transfer of the Predecessors to us took place within the Phillips 66 consolidated group. The consolidated statement of income also includes expense allocations for certain functions performed by Phillips 66 and historically not allocated to our Predecessors, including allocations of general corporate expenses related to executive oversight, accounting, treasury, tax, legal, information technology and procurement; and operational support services such as engineering and logistics. These allocations were based primarily on relative values of net properties, plants and equipment (PP&E) and equity method investments, or pipeline miles. Our management believes the assumptions underlying the allocation of expenses from Phillips 66 were reasonable. Nevertheless, the financial results of our Predecessors may not include all of the actual expenses that would have been incurred had we been a stand-alone publicly traded partnership during the periods presented and may not reflect our actual results of operations, financial position and cash flows had we been a stand-alone publicly traded partnership during the periods prior to the Offering or the Gold Line/Medford Acquisition.
	All financial information presented for the periods after the Offering represents the consolidated results of operations, financial position and cash flows of the Partnership with retrospective adjustments of the combined results of operations, financial position and cash flows of the Acquired Assets. Accordingly:
	•	Our consolidated statement of income for the three months ended September 30, 2014, consists of the consolidated results of the Partnership. Our consolidated statement of income for the nine months ended September 30, 2014, consists of the combined results of the Acquired Assets and the consolidated results of the Partnership for the first two months of 2014, and the consolidated results of the Partnership for the remaining seven months. Our consolidated statement of income for the three months ended September 30, 2013, consists of the combined results of our pre-Offering predecessor for the period from July 1, 2013, through July 25, 2013, the consolidated results of the Partnership for the period from July 26, 2013, through September 30, 2013, and the combined results of the Acquired Assets for the period from July 1, 2013, through September 30, 2013. Our consolidated statement of income for the nine months ended September 30, 2013, consists of the combined results of our pre-Offering predecessor for the period from January 1, 2013, through July 25, 2013, the consolidated results of the Partnership for the period from July 26, 2013, through September 30, 2013, and the combined results of the Acquired Assets for the period from January 1, 2013, through September 30, 2013.
	•	Our consolidated balance sheet at September 30, 2014, consists of the consolidated balances of the Partnership, while at December 31, 2013, it consists of the consolidated balances of the Partnership and the combined balances of the Acquired Assets.
	•	Our consolidated statement of cash flows for the nine months ended September 30, 2014, consists of the combined results of the Acquired Assets and the consolidated results of the Partnership for the first two months of 2014, and the consolidated results of the Partnership for the remaining seven months. Our consolidated statement of cash flows for the nine months ended September 30, 2013, consists of the combined results of our pre-Offering predecessor for the period from January 1, 2013, through July 25, 2013, the consolidated results of the Partnership for the period from July 26, 2013, through September 30, 2013, and the combined results of the Acquired Assets for the period from January 1, 2013, through September 30, 2013.
	•	Our consolidated statement of changes in equity for the nine months ended September 30, 2014, consists of both the combined activity of the Acquired Assets and the consolidated activity of the Partnership prior to March 1, 2014, and the consolidated activity of the Partnership completed at and after March 1, 2014, through September 30, 2014. Our consolidated statement of changes in equity for the nine months ended September 30, 2013, consists of the combined activity of our pre-Offering predecessor from January 1, 2013, through July 25, 2013, the consolidated activity of the Partnership completed at and after July 26, 2013, through September 30, 2013, and the combined activity of the Acquired Assets from January 1, 2013, through September 30, 2013.
Earnings Per Share, Policy [Policy Text Block]	'
	Net income per unit applicable to common units and to subordinated units is computed by dividing the respective limited partners’ interest in net income attributable to the Partnership by the weighted average number of common units and subordinated units, respectively, outstanding for the period. Because we have more than one class of participating securities, we use the two-class method to calculate the net income per unit applicable to limited partners. The classes of participating securities include common units, subordinated units, general partner units, and IDRs. Basic and diluted net income per unit are the same because we do not have potentially dilutive units outstanding for the periods presented.

Gold_LineMedford_Acquisition_T

Gold Line/Medford Acquisition (Tables)	9 Months Ended
	Sep. 30, 2014
Business Combinations [Abstract]	'
Schedule of Results of Operations Giving Effect to the Gold Line/Medford Acquisition	'
	The following tables present our results of operations and financial position giving effect to the Gold Line/Medford Acquisition. The combined results of the Acquired Assets prior to the Effective Date are included in “Acquired Assets Predecessor.” The consolidated results of the Acquired Assets after the Effective Date are included in “Phillips 66 Partners LP.”
		Millions of Dollars
		Nine Months Ended September 30, 2014
		Phillips 66 Partners LP		Acquired Assets Predecessor	Consolidated Results
	Revenues
	Transportation and terminaling services—related parties	$	142.5	15.2	157.7
	Transportation and terminaling services—third parties	3.7		0.7	4.4
	Other income	0.1		—	0.1
	Total revenues	146.3		15.9	162.2
	Costs and Expenses
	Operating and maintenance expenses	33.8		3.3	37.1
	Depreciation	10.3		1.2	11.5
	General and administrative expenses	15.9		1.1	17
	Taxes other than income taxes	2.7		0.6	3.3
	Interest and debt expense	3.2		—	3.2
	Total costs and expenses	65.9		6.2	72.1
	Income before income taxes	80.4		9.7	90.1
	Provision for income taxes	0.6		—	0.6
	Net Income	79.8		9.7	89.5
	Less: Net income attributable to predecessors	—		9.7	9.7
	Net Income Attributable to the Partnership	$	79.8	—	79.8
		Millions of Dollars
		Three Months Ended September 30, 2013
		Phillips 66 Partners LP		Acquired Assets Predecessor	Consolidated Results
	Revenues
	Transportation and terminaling services—related parties	$	29.5	19.2	48.7
	Transportation and terminaling services—third parties	—		1.7	1.7
	Other income	0.1		—	0.1
	Total revenues	29.6		20.9	50.5
	Costs and Expenses
	Operating and maintenance expenses	7.5		6.7	14.2
	Depreciation	1.6		1.8	3.4
	General and administrative expenses	2.5		1.4	3.9
	Taxes other than income taxes	0.4		0.7	1.1
	Interest and debt expense	0.1		—	0.1
	Total costs and expenses	12.1		10.6	22.7
	Income before income taxes	17.5		10.3	27.8
	Provision for income taxes	0.2		—	0.2
	Net Income	17.3		10.3	27.6
	Less: Net income attributable to predecessors	5.4		10.3	15.7
	Net Income Attributable to the Partnership	$	11.9	—	11.9
		Millions of Dollars
		Nine Months Ended September 30, 2013
		Phillips 66 Partners LP		Acquired Assets Predecessor	Consolidated Results
	Revenues
	Transportation and terminaling services—related parties	$	76.6	57.5	134.1
	Transportation and terminaling services—third parties	0.1		3.8	3.9
	Other income	0.1		—	0.1
	Total revenues	76.8		61.3	138.1
	Costs and Expenses
	Operating and maintenance expenses	19.7		18.7	38.4
	Depreciation	4.7		5.3	10
	General and administrative expenses	6.9		4.3	11.2
	Taxes other than income taxes	1.3		2.2	3.5
	Interest and debt expense	0.1		—	0.1
	Total costs and expenses	32.7		30.5	63.2
	Income before income taxes	44.1		30.8	74.9
	Provision for income taxes	0.4		—	0.4
	Net Income	43.7		30.8	74.5
	Less: Net income attributable to predecessors	31.8		30.8	62.6
	Net Income Attributable to the Partnership	$	11.9	—	11.9
		Millions of Dollars
		31-Dec-13
	Phillips 66 Partners LP		Acquired Assets Predecessor	Consolidated Results
Assets
Cash and cash equivalents	$	425.1	—	425.1
Accounts receivable—related parties	11.3		—	11.3
Accounts receivable—third parties	0.1		0.5	0.6
Materials and supplies	0.6		1.4	2
Other current assets	2.3		—	2.3
Total Current Assets	439.4		1.9	441.3
Net properties, plants and equipment	135.9		135.3	271.2
Goodwill	2.5		—	2.5
Deferred rentals—related parties	6.4		—	6.4
Total Assets	$	584.2	137.2	721.4
Liabilities
Accounts payable—related parties	$	5.2	—	5.2
Accounts payable—third parties	3		5	8
Payroll and benefits payable	—		0.1	0.1
Accrued property and other taxes	1		1.3	2.3
Current portion of accrued environmental costs	—		2	2
Other current liabilities	0.4		—	0.4
Total Current Liabilities	9.6		8.4	18
Asset retirement obligations	0.4		2	2.4
Accrued environmental costs	—		1.4	1.4
Deferred income taxes	0.1		—	0.1
Total Liabilities	10.1		11.8	21.9
Equity
Net investment—predecessors	—		125.4	125.4
Common unitholders—public	409.1		—	409.1
Common unitholder—Phillips 66	48.6		—	48.6
Subordinated unitholder—Phillips 66	104.9		—	104.9
General partner—Phillips 66	11.5		—	11.5
Total Equity	574.1		125.4	699.5
Total Liabilities and Equity	$	584.2	137.2	721.4

Properties_Plants_and_Equipmen1

Properties, Plants and Equipment (Tables)	9 Months Ended
	Sep. 30, 2014
Property, Plant and Equipment [Abstract]	'
Summary of Property, Plant and Equipment	'
	Our investment in PP&E, with the associated accumulated depreciation, was:
		Millions of Dollars
		September 30			31-Dec
		2014			2013
	Cost:
	Land	$	5		5
	Buildings and improvements	16.1			15.6
	Pipelines and related assets	151.3			150.7
	Terminals and related assets	333.1			286.5
	Construction-in-progress	8.6			43
	Gross PP&E	514.1			500.8
	Less: Accumulated depreciation	(240.2		)	(229.6	)
	Net PP&E	$	273.9		271.2

Net_Income_Per_Limited_Partner1

Net Income Per Limited Partner Unit (Tables)	9 Months Ended
	Sep. 30, 2014
Partners' Capital Notes [Abstract]	'
Schedule of Distributions Declared, Partners Interest in Partnership Net Income and Net Income per Unit by Class	'
		Millions of Dollars
		Three Months Ended September 30				Nine Months Ended September 30
		2014		2013		2014	2013
	Net income attributable to the Partnership	$	29.4	11.9		79.8	11.9
	Less: General partner’s distributions declared (including IDRs)*	1.9		0.2		4.3	0.2
	Limited partners’ distributions declared on common units*	12.3		5.4		34.6	5.4
	Limited partner’s distributions declared on subordinated units*	11.1		5.5		31.4	5.5
	Distributions less than net income attributable to the Partnership	$	4.1	0.8		9.5	0.8
	*Distributions declared attributable to the indicated periods.
		General Partner (including IDRs)		Limited Partners’ Common Units		Limited Partner’s Subordinated Units	Total
	Three Months Ended September 30, 2014
	Net income attributable to the Partnership (millions):
	Distribution declared	$	1.9	12.3		11.1	25.3
	Distribution less than net income attributable to the Partnership	0.1		2		2	4.1
	Net income attributable to the Partnership	$	2	14.3		13.1	29.4
	Weighted average units outstanding:
	Basic	1,509,486		38,747,707		35,217,112	75,474,305
	Diluted	1,509,486		38,747,707		35,217,112	75,474,305
	Net income per limited partner unit (dollars):
	Basic			$	0.37	0.37
	Diluted			0.37		0.37
	Three Months Ended September 30, 2013
	Net income attributable to the Partnership (millions):
	Distribution declared*	$	0.2	5.4		5.5	11.1
	Distribution less than net income attributable to the Partnership	—		0.4		0.4	0.8
	Net income attributable to the Partnership	$	0.2	5.8		5.9	11.9
	Weighted average units outstanding:
	Basic	1,437,433		35,217,112		35,217,112	71,871,657
	Diluted	1,437,433		35,217,112		35,217,112	71,871,657
	Net income per limited partner unit (dollars):
	Basic			$	0.17	0.17
	Diluted			0.17		0.17
	*Common and subordinated unitholders, as a group, each received distributions totaling $5.45 million. Differences in the above table are due to rounding impacts.
		General Partner (including IDRs)		Limited Partners’ Common Units		Limited Partner’s Subordinated Units	Total
	Nine Months Ended September 30, 2014
	Net income attributable to the Partnership (millions):
	Distributions declared	$	4.3	34.6		31.4	70.3
	Distributions less than net income attributable to the Partnership	0.2		4.8		4.5	9.5
	Net income attributable to the Partnership	$	4.5	39.4		35.9	79.8
	Weighted average units outstanding:
	Basic	1,493,914		37,984,685		35,217,112	74,695,711
	Diluted	1,493,914		37,984,685		35,217,112	74,695,711
	Net income per limited partner unit (dollars):
	Basic			$	1.04	1.02
	Diluted			1.04		1.02
	Nine Months Ended September 30, 2013
	Net income attributable to the Partnership (millions):
	Distribution declared*	$	0.2	5.4		5.5	11.1
	Distribution less than net income attributable to the Partnership	—		0.4		0.4	0.8
	Net income attributable to the Partnership	$	0.2	5.8		5.9	11.9
	Weighted average units outstanding:
	Basic	1,437,433		35,217,112		35,217,112	71,871,657
	Diluted	1,437,433		35,217,112		35,217,112	71,871,657
	Net income per limited partner unit (dollars):
	Basic			$	0.17	0.17
	Diluted			0.17		0.17
	*Common and subordinated unitholders, as a group, each received distributions totaling $5.45 million. Differences in the above table are due to rounding impacts.
	On October 22, 2014, the Board of Directors of our General Partner declared a quarterly cash distribution of $0.3168 per limited partner unit which, combined with distributions to our General Partner, resulted in total distributions of $25.3 million attributable to the third quarter of 2014.

Cash_Flow_Information_Tables

Cash Flow Information (Tables)	9 Months Ended
	Sep. 30, 2014
Cash Flow Information [Abstract]	'
Summary of Cash Flow Information	'
		Millions of Dollars
		Nine Months Ended
		30-Sep
		2014		2013
	Noncash Investing and Financing Activities
	Certain liabilities of the Acquired Assets retained by Phillips 66*	$	5.4	—
	Note payable—related parties associated with the Gold Line/Medford Acquisition	160		—
	The issuance of common and general partner units to Phillips 66	—		—
	PP&E transfer from Phillips 66**	1		—
	Environmental and legal cost contribution from Phillips 66***	0.7		—
	Cash Payments
	Interest	$	1.9	0.2
	Income taxes****	0.2		—
	* Certain liabilities of the Acquired Assets were retained by Phillips 66, pursuant to the terms of the Contribution Agreement. See Note 8—Contingencies, for additional information on these excluded liabilities associated with the Acquired Assets.
	** Capital expenditures on the Medford spheres recorded after the Effective Date were transferred to us from Phillips 66 as a capital contribution from our General Partner.
	*** Certain environmental and legal costs associated with our assets were allocated from and paid directly by Phillips 66. These costs were related to the accrued environmental and legal liabilities retained by Phillips 66 pursuant to the amended omnibus agreement and the Contribution Agreement. These costs were deemed a noncash contribution from Phillips 66.
	**** Excludes our share of cash tax payments made directly by Phillips 66 prior to the Offering on July 26, 2013, and the Gold Line/Medford Acquisition on March 1, 2014, in respect of the Acquired Assets.

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	9 Months Ended
	Sep. 30, 2014
Related Party Transactions [Abstract]	'
Summary of Related Party Charges	'
	Significant related-party transactions included in operating and maintenance expenses, general and administrative expenses, and interest and debt expense were:
		Millions of Dollars
		Three Months Ended			Nine Months Ended
		30-Sep			30-Sep
		2014		2013*	2014	2013*
	Operating and maintenance expenses	$	7.9	6.4	23	17.1
	General and administrative expenses	4.5		3.9	14.1	11.2
	Interest and debt expense	1.2		—	2.8	—
	Total	$	13.6	10.3	39.9	28.3

Business_and_Basis_of_Presenta2

Business and Basis of Presentation (Narrative) (Details)	1 Months Ended
	Jul. 27, 2013	Sep. 30, 2014	Sep. 30, 2014	Mar. 01, 2014
	Common Units [Member]	Gold Line Products System, Parallel Lateral Lines, Paola,Kansas to Kansas City, Kansas [Member]	Gold Line products system, terminals, Wichita, Kansas; Kansas City, Kansas; Jefferson City, Missouri; and Cahokia, Illinois [Member]	Medford Spheres, Medford, Oklahoma [Member]
		Phillips 66 [Member]	Phillips 66 [Member]	Phillips 66 [Member]
		Gold Line Products System and Medford Spheres [Member]	Gold Line Products System and Medford Spheres [Member]	Gold Line Products System and Medford Spheres [Member]
		Item	Item	Item
Limited Liability Company or Limited Partnership, Business Organization and Operations [Abstract]	'	'	'	'
Initial public offering of common units, number of units	18,888,750	'	'	'
Number of parallel lateral lines	'	2	'	'
Number of terminals	'	'	4	'
Number of newly-constructed refinery-grade propylene storage spheres	'	'	'	2

Gold_LineMedford_Acquisition_S

Gold Line/Medford Acquisition (Schedule of Results of Operations Giving Effect to the Gold Line/Medford Acquisition) (Details) (USD $)	3 Months Ended			9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013		Dec. 31, 2013
Revenues	'	'		'	'		'
Transportation and terminaling services—related parties	$52.70	$48.70	[1]	$157.70	$134.10	[1]	'
Transportation and terminaling services—third parties	0.7	1.7	[1]	4.4	3.9	[1]	'
Other income	'	0.1	[1]	0.1	0.1	[1]	'
Total revenues	53.4	50.5	[1]	162.2	138.1	[1]	'
Costs and Expenses	'	'		'	'		'
Operating and maintenance expenses	12.5	14.2	[1]	37.1	38.4	[1]	'
Depreciation	4	3.4	[1]	11.5	10	[1]	'
General and administrative expenses	4.9	3.9	[1]	17	11.2	[1]	'
Taxes other than income taxes	1.1	1.1	[1]	3.3	3.5	[1]	'
Interest and debt expense	1.4	0.1	[1]	3.2	0.1	[1]	'
Total costs and expenses	23.9	22.7	[1]	72.1	63.2	[1]	'
Income before income taxes	29.5	27.8	[1]	90.1	74.9	[1]	'
Provision for income taxes	0.1	0.2	[1]	0.6	0.4	[1]	'
Net Income	29.4	27.6	[1]	89.5	74.5	[1]	'
Less: Net income attributable to predecessors	'	15.7		9.7	62.6	[1]	'
Net income attributable to the Partnership	29.4	11.9	[1]	79.8	11.9	[1]	'
Assets, Current [Abstract]	'	'		'	'		'
Cash and cash equivalents	43	421.6	[1]	43	421.6	[1]	425.1
Accounts receivable—related parties	18.2	'		18.2	'		11.3
Accounts receivable—third parties	0.9	'		0.9	'		0.6
Materials and supplies	2	'		2	'		2
Other current assets	2.9	'		2.9	'		2.3
Total Current Assets	67	'		67	'		441.3
Net properties, plants and equipment	273.9	'		273.9	'		271.2
Goodwill	2.5	'		2.5	'		2.5
Deferred rentals—related parties	6	'		6	'		6.4
Total Assets	350.5	'		350.5	'		721.4
Liabilities, Current [Abstract]	'	'		'	'		'
Accounts payable—related parties	2.6	'		2.6	'		5.2
Accounts payable—third parties	4.2	'		4.2	'		8
Payroll and benefits payable	'	'		'	'		0.1
Accrued property and other taxes	3.5	'		3.5	'		2.3
Current portion of accrued environmental costs	'	'		'	'		2
Other current liabilities	'	'		'	'		0.4
Total Current Liabilities	14.5	'		14.5	'		18
Asset retirement obligations	2.5	'		2.5	'		2.4
Accrued environmental costs	'	'		'	'		1.4
Deferred income taxes	'	'		'	'		0.1
Total Liabilities	177.5	'		177.5	'		21.9
Equity [Abstract]	'	'		'	'		'
General partner—Phillips 66	-406.4	'		-406.4	'		11.5
Total Equity	173	686.1	[1]	173	686.1	[1]	699.5
Liabilities and Equity	350.5	'		350.5	'		721.4
Phillips 66 [Member]	'	'		'	'		'
Equity [Abstract]	'	'		'	'		'
Net investment-predecessors	'	'		'	'		125.4
Common Units [Member]	'	'		'	'		'
Costs and Expenses	'	'		'	'		'
Net income attributable to the Partnership	'	5.8		'	5.8		'
Subordinated Units [Member]	'	'		'	'		'
Costs and Expenses	'	'		'	'		'
Net income attributable to the Partnership	'	5.9		'	5.9		'
Public [Member] | Common Units [Member]	'	'		'	'		'
Costs and Expenses	'	'		'	'		'
Net income attributable to the Partnership	'	'		19.3	3.1		'
Equity [Abstract]	'	'		'	'		'
Unitholders	413.2	'		413.2	'		409.1
Total Equity	413.2	407.5	[1]	413.2	407.5	[1]	409.1
Non-public [Member] | Common Units [Member] | Phillips 66 [Member]	'	'		'	'		'
Costs and Expenses	'	'		'	'		'
Net income attributable to the Partnership	'	'		20.1	2.7		'
Equity [Abstract]	'	'		'	'		'
Unitholders	53.6	'		53.6	'		48.6
Total Equity	53.6	47.3	[1]	53.6	47.3	[1]	48.6
Non-public [Member] | Subordinated Units [Member] | Phillips 66 [Member]	'	'		'	'		'
Costs and Expenses	'	'		'	'		'
Net income attributable to the Partnership	'	'		35.9	5.9		'
Equity [Abstract]	'	'		'	'		'
Unitholders	112.6	'		112.6	'		104.9
Total Equity	112.6	102	[1]	112.6	102	[1]	104.9
Scenario, Previously Reported [Member]	'	'		'	'		'
Revenues	'	'		'	'		'
Transportation and terminaling services—related parties	'	29.5		142.5	76.6		'
Transportation and terminaling services—third parties	'	'		3.7	0.1		'
Other income	'	0.1		0.1	0.1		'
Total revenues	'	29.6		146.3	76.8		'
Costs and Expenses	'	'		'	'		'
Operating and maintenance expenses	'	7.5		33.8	19.7		'
Depreciation	'	1.6		10.3	4.7		'
General and administrative expenses	'	2.5		15.9	6.9		'
Taxes other than income taxes	'	0.4		2.7	1.3		'
Interest and debt expense	'	0.1		3.2	0.1		'
Total costs and expenses	'	12.1		65.9	32.7		'
Income before income taxes	'	17.5		80.4	44.1		'
Provision for income taxes	'	0.2		0.6	0.4		'
Net Income	'	17.3		79.8	43.7		'
Less: Net income attributable to predecessors	'	5.4		'	31.8		'
Net income attributable to the Partnership	'	11.9		79.8	11.9		'
Assets, Current [Abstract]	'	'		'	'		'
Cash and cash equivalents	'	'		'	'		425.1
Accounts receivable—related parties	'	'		'	'		11.3
Accounts receivable—third parties	'	'		'	'		0.1
Materials and supplies	'	'		'	'		0.6
Other current assets	'	'		'	'		2.3
Total Current Assets	'	'		'	'		439.4
Net properties, plants and equipment	'	'		'	'		135.9
Goodwill	'	'		'	'		2.5
Deferred rentals—related parties	'	'		'	'		6.4
Total Assets	'	'		'	'		584.2
Liabilities, Current [Abstract]	'	'		'	'		'
Accounts payable—related parties	'	'		'	'		5.2
Accounts payable—third parties	'	'		'	'		3
Accrued property and other taxes	'	'		'	'		1
Other current liabilities	'	'		'	'		0.4
Total Current Liabilities	'	'		'	'		9.6
Asset retirement obligations	'	'		'	'		0.4
Deferred income taxes	'	'		'	'		0.1
Total Liabilities	'	'		'	'		10.1
Equity [Abstract]	'	'		'	'		'
General partner—Phillips 66	'	'		'	'		11.5
Total Equity	'	'		'	'		574.1
Liabilities and Equity	'	'		'	'		584.2
Scenario, Previously Reported [Member] | Public [Member] | Common Units [Member]	'	'		'	'		'
Equity [Abstract]	'	'		'	'		'
Unitholders	'	'		'	'		409.1
Scenario, Previously Reported [Member] | Non-public [Member] | Common Units [Member] | Phillips 66 [Member]	'	'		'	'		'
Equity [Abstract]	'	'		'	'		'
Unitholders	'	'		'	'		48.6
Scenario, Previously Reported [Member] | Non-public [Member] | Subordinated Units [Member] | Phillips 66 [Member]	'	'		'	'		'
Equity [Abstract]	'	'		'	'		'
Unitholders	'	'		'	'		104.9
Scenario, Adjustment [Member] | Gold Line Products System and Medford Spheres [Member] | Phillips 66 [Member] | Phillips 66 [Member]	'	'		'	'		'
Revenues	'	'		'	'		'
Transportation and terminaling services—related parties	'	19.2		15.2	57.5		'
Transportation and terminaling services—third parties	'	1.7		0.7	3.8		'
Total revenues	'	20.9		15.9	61.3		'
Costs and Expenses	'	'		'	'		'
Operating and maintenance expenses	'	6.7		3.3	18.7		'
Depreciation	'	1.8		1.2	5.3		'
General and administrative expenses	'	1.4		1.1	4.3		'
Taxes other than income taxes	'	0.7		0.6	2.2		'
Total costs and expenses	'	10.6		6.2	30.5		'
Income before income taxes	'	10.3		9.7	30.8		'
Net Income	'	10.3		9.7	30.8		'
Less: Net income attributable to predecessors	'	10.3		9.7	30.8		'
Assets, Current [Abstract]	'	'		'	'		'
Accounts receivable—third parties	'	'		'	'		0.5
Materials and supplies	'	'		'	'		1.4
Total Current Assets	'	'		'	'		1.9
Net properties, plants and equipment	'	'		'	'		135.3
Total Assets	'	'		'	'		137.2
Liabilities, Current [Abstract]	'	'		'	'		'
Accounts payable—third parties	'	'		'	'		5
Payroll and benefits payable	'	'		'	'		0.1
Accrued property and other taxes	'	'		'	'		1.3
Current portion of accrued environmental costs	'	'		'	'		2
Total Current Liabilities	'	'		'	'		8.4
Asset retirement obligations	'	'		'	'		2
Accrued environmental costs	'	'		'	'		1.4
Total Liabilities	'	'		'	'		11.8
Equity [Abstract]	'	'		'	'		'
Net investment-predecessors	'	'		'	'		125.4
Total Equity	'	'		'	'		125.4
Liabilities and Equity	'	'		'	'		$137.20
[1]	Prior-period financial information has been retrospectively adjusted for the Gold Line/Medford Acquisition.

Gold_LineMedford_Acquisition_N

Gold Line/Medford Acquisition (Narrative) (Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013	Mar. 01, 2014	Sep. 30, 2014	Sep. 30, 2014	Mar. 01, 2014	Mar. 01, 2014	Mar. 01, 2014	Mar. 01, 2014	Mar. 01, 2014
In Millions, except Share data, unless otherwise specified			Phillips 66 [Member]	Phillips 66 [Member]	Phillips 66 [Member]	Common Units [Member]	Subordinated Units [Member]	Gold Line Products System and Medford Spheres [Member]	Gold Line Products System and Medford Spheres [Member]	General Partner Units [Member]
						Phillips 66 [Member]	Phillips 66 [Member]	Phillips 66 [Member]	Common Units [Member]	Gold Line Products System and Medford Spheres [Member]
									Phillips 66 [Member]	Phillips 66 [Member]
Statement [Line Items]	'	'	'	'	'	'	'	'	'	'
Total consideration for Gold Line/Medford Assets acquired	'	'	'	'	'	'	'	$700	'	'
Cash consideration portion of total consideration for Gold Line/Medford Assets acquired	'	'	'	'	'	'	'	400	'	'
Number of units issued portion of total consideration for Gold Line/Medford Assets acquired	'	'	'	'	'	'	'	'	3,530,595	72,053
General partner interest, percent	'	'	2.00%	2.00%	'	'	'	'	'	'
Aggregate fair value of units issued for Gold Line/Medford Assets acquired	'	'	'	'	'	'	'	140	'	'
Assumption of a note payable to a subsidiary of Phillips 66	'	'	'	'	'	'	'	160	'	'
Transaction costs	'	'	'	'	'	'	'	1.8	'	'
Number of units owned by Phillips 66	'	'	'	'	'	19,858,957	35,217,112	'	'	'
Limited partner ownership interest, percent	'	'	'	'	73.00%	'	'	'	'	'
Number of general partner units owned by Phillips 66	1,509,486	1,437,433	1,509,486	'	'	'	'	'	'	'
Historical carrying value of assets transferred	'	'	'	'	'	'	'	$138	'	'

Properties_Plants_and_Equipmen2

Properties, Plants and Equipment (Summary of Properties, Plants and Equipment)(Details) (USD $)	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Gross PP&E	$514.10	$500.80
Less: accumulated depreciation	-240.2	-229.6
Net PP&E	273.9	271.2
Land [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Gross PP&E	5	5
Building and Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Gross PP&E	16.1	15.6
Pipelines and Related Assets [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Gross PP&E	151.3	150.7
Terminals and Related Assets [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Gross PP&E	333.1	286.5
Construction in Progress [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Gross PP&E	$8.60	$43

Debt_Narrative_Details

Debt (Narrative) (Details) (USD $)	2 Months Ended
In Millions, unless otherwise specified	Mar. 01, 2014	Sep. 30, 2014
Carrying value of note payable to a subsidiary of Phillips 66	'	$160
Phillips 66 [Member] | Gold Line Products System and Medford Spheres [Member] | Phillips 66 [Member]	'	'
Carrying value of note payable to a subsidiary of Phillips 66	160	'
Note Payable, 160 million US, 5-year, 3 percent [Member] | Phillips 66 [Member] | Gold Line Products System and Medford Spheres [Member] | Phillips 66 [Member] | Assignment, Assumption and Modification of Note (the Assumption Agreement) [Member]	'	'
Assumption of note payable to a subsidiary of Phillps 66	160	'
Per annum fixed interest rate of note payable, percent	3.00%	'
Carrying value of note payable to a subsidiary of Phillips 66	'	160
Discount rate increase to reflect a structuring fee, in basis points	'	0.20%
Note Payable, 160 million US, 5-year, 3 percent [Member] | Estimate of Fair Value Measurement [Member] | Phillips 66 [Member] | Gold Line Products System and Medford Spheres [Member] | Phillips 66 [Member] | Assignment, Assumption and Modification of Note (the Assumption Agreement) [Member]	'	'
Fair value of note payable to a subsidiary of Phillips 66	'	$163.50

Net_Income_Per_Limited_Partner2

Net Income Per Limited Partner Unit (Schedule of Net Income By Class of Participating Securities) (Details) (USD $)	3 Months Ended				9 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Partners' Capital [Abstract]	'		'		'		'
Net income attributable to the Partnership	$29.40		$11.90	[1]	$79.80		$11.90	[1]
Distributions declared	25.3		11.1	[2]	70.3		11.1	[2]
Distributions less than net income attributable to the Partnership	4.1		0.8		9.5		0.8
Weighted average units outstanding, general partner, basic	1,509,486		1,437,433		1,493,914		1,437,433
Weighted average units outstanding, basic	75,474,305		71,871,657		74,695,711		71,871,657
Weighted average units outstanding, general partner, diluted	1,509,486		1,437,433		1,493,914		1,437,433
Weighted average units outstanding, diluted	75,474,305		71,871,657		74,695,711		71,871,657
Common Units [Member]	'		'		'		'
Partners' Capital [Abstract]	'		'		'		'
Net income attributable to the Partnership	'		5.8		'		5.8
Weighted average units outstanding, limited partner, basic	38,747,707		35,217,112		37,984,685		35,217,112
Weighted average units outstanding, limited partner, diluted	38,747,707		35,217,112		37,984,685		35,217,112
Net income per limited partner unit, basic (dollars)	$0.37		$0.17		$1.04		$0.17
Net income per limited partner unit, diluted (dollars)	$0.37		$0.17		$1.04		$0.17
Subordinated Units [Member]	'		'		'		'
Partners' Capital [Abstract]	'		'		'		'
Net income attributable to the Partnership	'		5.9		'		5.9
Weighted average units outstanding, limited partner, basic	35,217,112		35,217,112		35,217,112		35,217,112
Weighted average units outstanding, limited partner, diluted	35,217,112		35,217,112		35,217,112		35,217,112
Net income per limited partner unit, basic (dollars)	$0.37		$0.17		$1.02		$0.17
Net income per limited partner unit, diluted (dollars)	$0.37		$0.17		$1.02		$0.17
General Partner [Member]	'		'		'		'
Partners' Capital [Abstract]	'		'		'		'
Net income attributable to the Partnership	2		0.2		4.5		0.2
Distributions declared	1.9	[3]	0.2	[2],[3]	4.3	[3]	0.2	[2],[3]
Distributions less than net income attributable to the Partnership	0.1		'		0.2		'
Limited Partner [Member] | Common Units [Member]	'		'		'		'
Partners' Capital [Abstract]	'		'		'		'
Net income attributable to the Partnership	14.3		'		39.4		'
Distributions declared	12.3	[3]	5.45	[2],[3]	34.6	[3]	5.45	[2],[3]
Distributions less than net income attributable to the Partnership	2		0.4		4.8		0.4
Limited Partner [Member] | Subordinated Units [Member]	'		'		'		'
Partners' Capital [Abstract]	'		'		'		'
Net income attributable to the Partnership	13.1		'		35.9		'
Distributions declared	11.1	[3]	5.45	[2],[3]	31.4	[3]	5.45	[2],[3]
Distributions less than net income attributable to the Partnership	$2		$0.40		$4.50		$0.40
[1]	Prior-period financial information has been retrospectively adjusted for the Gold Line/Medford Acquisition.
[2]	Common and subordinated unitholders, as a group, each received distributions totaling $5.45 million. Differences in the above table are due to rounding impacts.
[3]	Distributions declared attributable to the indicated periods.

Net_Income_Per_Limited_Partner3

Net Income Per Limited Partner Unit (Narrative) (Details) (USD $)	9 Months Ended	1 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2014	Oct. 22, 2014
		Cash Distribution [Member]
		Subsequent Event [Member]
Subsequent Event [Line Items]	'	'
Quarterly cash distribution declared per limited partner unit	'	$0.32
Total distributions attributable to the third quarter	$61.20	$25.30

Contingencies_Narrative_Detail

Contingencies (Narrative) (Details) (USD $)	Jul. 24, 2013	Jul. 24, 2013	Jul. 24, 2013	Sep. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified	Losses Related To Contributed Assets Subject to a Deductible before Eligibility For Indemnification Under the Omnibus Agreement[Member]	Litigation Matters [Member]	Environmental Liabilities [Member]	Gold Line Products System and Medford Spheres [Member]	Gold Line Products System and Medford Spheres [Member]
		Losses Related To Contributed Assets Subject to a Deductible before Eligibility For Indemnification Under the Omnibus Agreement[Member]	Losses Related To Contributed Assets Subject to a Deductible before Eligibility For Indemnification Under the Omnibus Agreement[Member]		Phillips 66 [Member]
Environmental	'	'	'	'	'
Accrued environmental liabilities	'	'	'	$0	$3.40
Indemnification	'	'	'	'	'
Aggregate deductible before entitled to indemnification by Phillips 66	'	0.2	0.1	'	'
Aggregate deductible before entitled to indemnification by Phillips 66 for litigation matters provided therein	$0.20	'	'	'	'

Employee_Benefit_Plans_Narrati

Employee Benefit Plans (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]	'	'	'	'
Pension and postretirement costs	$0.10	$0.60	$0.50	$2.30

Cash_Flow_Information_Summary_

Cash Flow Information (Summary of Cash Flow Information) (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013
Income Taxes Paid, Net [Abstract]	'		'
Interest	$1.90		$0.20
Income Taxes Paid, Net [Abstract]	'		'
Income taxes	0.2	[1]	'
Gold Line Products System and Medford Spheres [Member] | Phillips 66 [Member]	'		'
Noncash Investing and Financing Items [Abstract]	'		'
Certain liabilities of the Acquired Assets retained by Phillips 66	5.4	[2]	'
Environmental and legal cost contribution from Phillips 66	0.7	[3]	'
MedfordSpheresCapitalExpendituresTransferred [Member] | General Partner [Member] | Gold Line Products System and Medford Spheres [Member] | Phillips 66 [Member]	'		'
Noncash Investing and Financing Items [Abstract]	'		'
PP&E transfer from Phillips 66	1	[4]	'
Gold Line Products System and Medford Spheres [Member] | Phillips 66 [Member]	'		'
Noncash Investing and Financing Items [Abstract]	'		'
Notes payable—related parties associated with the Gold LIne/Medford Acquisition	$160		'
[1]	Excludes our share of cash tax payments made directly by Phillips 66 prior to the Offering on July 26, 2013, and the Gold Line/Medford Acquisition on March 1, 2014, in respect of the Acquired Assets.
[2]	Certain liabilities of the Acquired Assets were retained by Phillips 66, pursuant to the terms of the Contribution Agreement. See Note 8—Contingencies, for additional information on these excluded liabilities associated with the Acquired Assets.
[3]	Certain environmental and legal costs associated with our assets were allocated from and paid directly by Phillips 66. These costs were related to the accrued environmental and legal liabilities retained by Phillips 66 pursuant to the amended omnibus agreement and the Contribution Agreement. These costs were deemed a noncash contribution from Phillips 66.
[4]	Capital expenditures on the Medford spheres recorded after the Effective Date were transferred to us from Phillips 66 as a capital contribution from our General Partner.

Cash_Flow_Information_Narrativ

Cash Flow Information (Narrative) (Details) (USD $)	2 Months Ended	9 Months Ended
	Mar. 01, 2014	Sep. 30, 2014
Business Acquisition [Line Items]	'	'
Historical book value of the net assets acquired	'	$138,000,000	[1]
Cash consideration deemed a distribution to our General Partner	'	262,000,000	[1]
Reduction in our General Partner’s capital balance	'	560,000,000
Phillips 66 [Member] | Gold Line Products System and Medford Spheres [Member]	'	'
Business Acquisition [Line Items]	'	'
Historical book value of the net assets acquired	138,000,000	'
Note payable assumed deemed a noncash distribution to General Partner	160,000,000	'
General Partner [Member]	'	'
Business Acquisition [Line Items]	'	'
Reduction in our General Partner’s capital balance	560,000,000	560,000,000
General Partner [Member] | Phillips 66 [Member] | Gold Line Products System and Medford Spheres [Member]	'	'
Business Acquisition [Line Items]	'	'
Cash consideration deemed a distribution to our General Partner	262,000,000	'
Value assigned to common and general partner units issued to Phillips 66	0	'
Common Units [Member] | Limited Partner [Member] | Phillips 66 [Member] | Gold Line Products System and Medford Spheres [Member]	'	'
Business Acquisition [Line Items]	'	'
Value assigned to common and general partner units issued to Phillips 66	$0	'
[1]	See Note 10—Cash Flow Information, for additional information.

Related_Parties_Transactions_S

Related Parties Transactions (Summary of Related Party Charges) (Details) (USD $)	3 Months Ended			9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Related Party Transaction [Line Items]	'	'		'	'
Operating and maintenance expenses	$7.90	$6.40	[1]	$23	$17.10	[1]
General and administrative expenses	4.5	3.9	[1]	14.1	11.2	[1]
Interest and debt expense	1.2	'		2.8	'
Total	$13.60	$10.30	[1]	$39.90	$28.30	[1]
[1]	Prior-period financial information has been retrospectively adjusted for the Gold Line/Medford Acquisition.

Related_Party_Transactions_Nar

Related Party Transactions (Narrative) (Details) (USD $)

Sep. 30, 2014

Jul. 24, 2013

Jun. 30, 2014

Feb. 28, 2014

Jul. 24, 2013

Jul. 24, 2013

Jul. 24, 2013

Jul. 24, 2013

Jul. 24, 2013

Jul. 24, 2013

Mar. 01, 2014

Mar. 01, 2014

Jul. 24, 2013

Mar. 01, 2014

Mar. 01, 2014

Mar. 01, 2014

In Millions, unless otherwise specified

Phillips 66 [Member]

Phillips 66 [Member]

Phillips 66 [Member]

Phillips 66 [Member]

Phillips 66 [Member]

Phillips 66 [Member]

Phillips 66 [Member]

DCP Sand Hills Pipeline, LLC [Member]

DCP Southern Hills Pipeline, LLC [Member]

Gold Line Products System and Medford Spheres [Member]

Gold Line Products System and Medford Spheres [Member]

Sweeny to Pasadena Pipelines [Member]

Gold Line Products System and Medford Spheres [Member]

Gold Line Products System and Medford Spheres [Member]

Gold Line Products System and Medford Spheres [Member]

Storage and Stevedoring Services [Member]

Amended Omnibus Agreement [Member]

Amended Omnibus Agreement [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Phillips 66 [Member]

Phillips 66 [Member]

Phillips 66 [Member]

Phillips 66 [Member]

Phillips 66 [Member]

Gold Line Products System [Member]

Gold Line Products System [Member]

Medford Spheres, Medford, Oklahoma [Member]

agreement

Transportation Services [Member]

Terminal Services [Member]

Transportation Services [Member]

Terminal Services [Member]

OriginationServicesAgreement [Member]

mi

Phillips 66 [Member]

Phillips 66 [Member]

Phillips 66 [Member]

renewal

renewal

renewal

renewal

agreement

pipeline

route

Maximum [Member]

Maximum [Member]

Storage Services Agreement [Member]

Storage Services Agreement [Member]

renewal

renewal

Related party agreements and fees

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of pipelines

'

'

'

'

'

'

'

'

'

'

'

'

2

'

'

'

Pipeline length in miles

'

'

'

'

'

'

'

'

'

'

'

'

60

'

'

'

Number of routes

'

'

'

'

'

'

'

'

'

'

'

'

'

4

'

'

Number of renewal options

'

'

'

'

1

2

2

3

'

'

'

'

'

'

2

2

Number of agreements

'

2

'

'

'

'

'

'

'

'

'

1

'

'

'

'

Percent of equity interest right of first offer to acquire Phillips 66's interest

'

'

'

'

'

'

'

'

33.30%

33.30%

'

'

'

'

'

'

Monthly operational and administrative support fee

'

'

$2.30

$1.10

'

'

'

'

'

'

'

'

'

'

'

'

Carrying value of note payable to a subsidiary of Phillips 66

$160

'

'

'

'

'

'

'

'

'

$160

'

'

'

'

'

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	3 Months Ended			9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Provision for income taxes	$0.10	$0.20	[1]	$0.60	$0.40	[1]
Effective tax rate, percentage	0.30%	0.70%		0.70%	0.50%
[1]	Prior-period financial information has been retrospectively adjusted for the Gold Line/Medford Acquisition.

Subsequent_Events_NarrativeDet

Subsequent Events (Narrative)(Details) (Subsequent Event [Member], USD $)	1 Months Ended
In Millions, except Share data, unless otherwise specified	Oct. 22, 2014
Crude Oil Rail-Unloading Facilities And Cross-Channel Connector Pipeline Assets [Member] | Phillips 66 [Member]	'
Subsequent Event [Line Items]	'
Total consideration	$340
Proceeds from Lines of Credit	28
Assumption of a note payable to a subsidiary of Phillips 66	244
Value of additional common and general partner units	$68
CrudeOilRailUnloadingFacilities [Member] | Phillips 66 [Member]	'
Subsequent Event [Line Items]	'
Number of assets	2
Common Units [Member] | Crude Oil Rail-Unloading Facilities And Cross-Channel Connector Pipeline Assets [Member] | Phillips 66 [Member]	'
Subsequent Event [Line Items]	'
Number of units issued	1,066,412
General Partner Units [Member] | Crude Oil Rail-Unloading Facilities And Cross-Channel Connector Pipeline Assets [Member] | Phillips 66 [Member]	'
Subsequent Event [Line Items]	'
Number of units issued	21,764
TenYearTerminalServicesAgreements [Member] | CrudeOilRailUnloadingFacilities [Member] | Phillips 66 [Member]	'
Subsequent Event [Line Items]	'
Capacity of the rail-unloading facilities	100.00%