Phillips 66 Partners (PSXP) 10-K 21 Feb 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Feb. 14, 2014	Feb. 14, 2014
		Common Units [Member]	Subordinated Units [Member]
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-K	'	'
Document Period End Date	31-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Amendment Flag	'false	'	'
Entity Common Stock, Shares Outstanding	'	35,217,112	35,217,112
Entity Well-known Seasoned Issuer	'No	'	'
Entity Voluntary Filers	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Public Float	$708	'	'

Consolidated_Statement_of_Inco

Consolidated Statement of Income (USD $)

5 Months Ended

12 Months Ended

5 Months Ended

12 Months Ended

5 Months Ended

12 Months Ended

5 Months Ended

12 Months Ended

In Millions, except Share data, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2012

Dec. 31, 2011

Cash Distribution [Member]

Common Units [Member]

Common Units [Member]

Common Units [Member]

Common Units [Member]

Common Units [Member]

Common Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Predecessor [Member]

Predecessor [Member]

Public [Member]

Public [Member]

Public [Member]

Non-public [Member]

Non-public [Member]

Non-public [Member]

Non-public [Member]

Non-public [Member]

Non-public [Member]

Majority Shareholder [Member]

Majority Shareholder [Member]

Majority Shareholder [Member]

Majority Shareholder [Member]

Majority Shareholder [Member]

Majority Shareholder [Member]

Revenues

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Transportation and terminaling servicesbrelated parties

'

$106.40

'

'

'

'

'

'

'

'

'

'

$79.70

$75.60

Transportation and terminaling servicesbthird parties

'

0.2

'

'

'

'

'

'

'

'

'

'

0.4

0.4

Other income

'

0.2

'

'

'

'

'

'

'

'

'

'

'

'

Total revenues

'

106.8

'

'

'

'

'

'

'

'

'

'

80.1

76

Costs and Expenses

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Operating and maintenance expenses

'

27.4

'

'

'

'

'

'

'

'

'

'

22.9

24.5

Depreciation

'

6.2

'

'

'

'

'

'

'

'

'

'

6.6

5.8

General and administrative expenses

'

10

'

'

'

'

'

'

'

'

'

'

7.8

5.6

Taxes other than income taxes

'

1.7

'

'

'

'

'

'

'

'

'

'

1.4

1.3

Interest and debt expense

'

0.3

'

'

'

'

'

'

'

'

'

'

'

'

Total costs and expenses

'

45.6

'

'

'

'

'

'

'

'

'

'

38.7

37.2

Income before income taxes

'

61.2

'

'

'

'

'

'

'

'

'

'

41.4

38.8

Provision for income taxes

'

0.5

'

'

'

'

'

'

'

'

'

'

0.3

0.3

Net income

28.9

60.7

'

7.6

'

'

6.5

'

'

14.2

'

'

41.1

38.5

Less: General partner's interest in net income subsequent to initial public offering

0.6

'

'

'

'

'

'

'

'

'

'

'

'

'

Limited partners' interest in net income subsequent to initial public offering

$28.30

'

'

'

'

'

'

'

'

'

'

'

'

'

Net Income Subsequent to Initial Public Offering Per Limited Partner UnitbBasic and Diluted (dollars)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Basic, per unit

'

'

'

'

'

'

'

'

'

$0.40

'

'

'

'

Diluted, per unit

'

'

'

'

'

'

'

'

'

$0.40

'

$0

'

'

Cash Distribution Paid Per Unit (dollars)

'

'

$0.15

'

'

'

'

'

'

'

'

'

'

'

Average Limited Partner Units OutstandingbBasis and Diluted (thousands)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Basic, units

'

'

'

18,889,000

'

'

16,328,000

'

'

35,217,112

'

'

'

'

Diluted, units

'

'

'

18,889,000

'

0

16,328,000

'

0

35,217,112

'

0

'

'

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2012
In Millions, unless otherwise specified		Public [Member]	Non-public [Member]	Non-public [Member]	Phillips 66 [Member]	Predecessor [Member]	Predecessor [Member]
		Common Units [Member]	Common Units [Member]	Subordinated Units [Member]			Phillips 66 [Member]
			Majority Shareholder [Member]	Majority Shareholder [Member]
Assets	'	'	'	'	'	'	'
Cash and cash equivalents	$425.10	'	'	'	'	'	'
Accounts receivablebrelated parties	11.3	'	'	'	'	'	'
Accounts receivablebthird parties	0.1	'	'	'	'	0.2	'
Materials and supplies	0.6	'	'	'	'	0.3	'
Other current assets	2.3	'	'	'	'	'	'
Total Current Assets	439.4	'	'	'	'	0.5	'
Net properties, plants and equipment	135.9	'	'	'	'	135.8	'
Goodwill	2.5	'	'	'	'	2.5	'
Deferred rentalsbrelated parties	6.4	'	'	'	'	6.1	'
Total Assets	584.2	'	'	'	'	144.9	'
Liabilities	'	'	'	'	'	'	'
Accounts payablebrelated parties	5.2	'	'	'	'	'	'
Accounts payablebthird parties	3	'	'	'	'	1.4	'
Payroll and benefits payable	'	'	'	'	'	0.2	'
Accrued property and other taxes	1	'	'	'	'	0.6	'
Other current liabilities	0.4	'	'	'	'	0.2	'
Total Current Liabilities	9.6	'	'	'	'	2.4	'
Asset retirement obligations	0.4	'	'	'	'	0.3	'
Accrued environmental costs	'	'	'	'	'	0.2	'
Deferred income taxes	0.1	'	'	'	'	'	'
Total Liabilities	10.1	'	'	'	'	2.9	'
Equity	'	'	'	'	'	'	'
Net investment	'	'	'	'	'	'	142
Unitholders	'	409.1	48.6	104.9	'	'	'
General partnerbPhillips 66 (1,437,433 units issued and outstanding)	11.5	'	'	'	'	'	'
Total Equity	574.1	409.1	48.6	104.9	'	142	'
Total Liabilities and Equity	$584.20	'	'	'	'	$144.90	'

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parenthetical)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Jul. 24, 2013	Jul. 24, 2013
	Non-public [Member]	Non-public [Member]	Common Units [Member]	Common Units [Member]	Common Units [Member]	Common Units [Member]	Subordinated Units [Member]	Subordinated Units [Member]	Phillips 66 [Member]	Phillips 66 [Member]
			Public [Member]	Public [Member]	Non-public [Member]	Non-public [Member]	Non-public [Member]	Non-public [Member]	Common Units [Member]	Subordinated Units [Member]
					Majority Shareholder [Member]	Majority Shareholder [Member]	Majority Shareholder [Member]	Majority Shareholder [Member]	Majority Shareholder [Member]	Majority Shareholder [Member]
Units issued	'	'	18,888,750	'	16,328,362	'	35,217,112	'	16,328,362	35,217,112
Units outstanding	'	'	18,888,750	'	16,328,362	'	35,217,112	'	'	'
General partner units issued	1,437,433	'	'	'	'	'	'	'	'	'
General partner units outstanding	1,437,433	'	'	'	'	'	'	'	'	'

Consolidated_Statement_of_Cash

Consolidated Statement of Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
				Predecessor [Member]	Predecessor [Member]	Public [Member]	Majority Shareholder [Member]	Majority Shareholder [Member]
						Common Units [Member]	Non-public [Member]	Non-public [Member]
							Common Units [Member]	Subordinated Units [Member]
Cash Flows From Operating Activities	'	'	'	'	'	'	'	'
Net income	$60.70	'	'	$41.10	$38.50	'	'	'
Adjustments to reconcile net income to net cash provided by operating activities	'	'	'	'	'	'	'	'
Depreciation	6.2	'	'	6.6	5.8	'	'	'
Deferred rentals and other	'	'	'	-2.2	-2	'	'	'
Working capital adjustments	'	'	'	'	'	'	'	'
Decrease (increase) in accounts receivable	-11.1	'	'	-0.1	'	'	'	'
Decrease (increase) in materials and supplies	-0.3	'	'	'	'	'	'	'
Decrease (increase) in other current assets	-2.2	'	'	'	'	'	'	'
Increase (decrease) in accounts payable	6.6	'	'	-0.8	1.3	'	'	'
Increase (decrease) in other accruals	0.4	'	'	-0.1	0.1	'	'	'
Net Cash Provided by Operating Activities	60.3	'	'	44.5	43.7	'	'	'
Cash Flows From Investing Activities	'	'	'	'	'	'	'	'
Capital expenditures	-6.6	'	'	-15	-10.5	'	'	'
Other	0.2	'	'	'	'	'	'	'
Net Cash Used in Investing Activities	-6.4	'	'	-15	-10.5	'	'	'
Cash Flows From Financing Activities	'	'	'	'	'	'	'	'
Net distributions to Phillips 66bprior to initial public offering	-25	'	'	-29.5	-33.2	'	'	'
Project prefunding from Phillips 66	3	'	'	'	0	'	'	'
Proceeds from issuance of common units	434.4	'	'	'	0	'	'	'
Offering costs	-30	'	'	'	0	'	'	'
Debt issuance costs	-0.1	'	'	'	0	'	'	'
Distributions to common unitholders	'	'	'	'	'	-2.9	-2.5	-5.5
Distributions to general partnerbPhillips 66	-0.2	'	'	'	'	'	'	'
Net Cash Provided by (Used in) Financing Activities	371.2	'	'	-29.5	-33.2	'	'	'
Net Change in Cash and Cash Equivalents	425.1	'	'	'	0	'	'	'
Cash and cash equivalents at beginning of period	'	'	'	'	'	'	'	'
Cash and Cash Equivalents at End of Period	$425.10	'	'	'	'	'	'	'

Consolidated_Statement_of_Chan

Consolidated Statement of Changes in Equity (USD $)	Total	General Partner [Member]	Non-public [Member]	Common Units [Member]	Common Units [Member]	Common Units [Member]	Subordinated Units [Member]	Net Investment [Member]	Predecessor [Member]	Predecessor [Member]
In Millions			General Partner [Member]		Public [Member]	Non-public [Member]	Non-public [Member]			Net Investment [Member]
						Majority Shareholder [Member]	Majority Shareholder [Member]
Begining Balance at Dec. 31, 2010	'	'	'	'	'	'	'	'	$125.10	$125.10
Net income	'	'	'	'	'	'	'	'	38.5	38.5
Net distributions to Phillips 66	'	'	'	'	'	'	'	'	-33.2	-33.2
Ending Balance at Dec. 31, 2011	'	'	'	'	'	'	'	'	130.4	130.4
Net income	'	'	'	'	'	'	'	'	41.1	41.1
Net distributions to Phillips 66	'	'	'	'	'	'	'	'	-29.5	-29.5
Ending Balance at Dec. 31, 2012	'	'	'	'	'	'	'	'	142	142
Net income	'	'	'	'	'	'	'	'	31.8	31.8
Net distributions to Phillips 66	'	'	'	'	'	'	'	'	-25	-25
Project prefunding from Phillips 66	'	'	'	'	'	'	'	'	3	3
Ending Balance at Jul. 25, 2013	'	'	'	'	'	'	'	'	'	'
Net income	28.9	'	0.6	14.1	7.6	6.5	14.2	'	'	'
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	'	'	'	'	'
Capital distributions to unitholders and general partner	-11.1	'	-0.2	'	-2.9	-2.5	-5.5	'	'	'
Other	0.1	'	'	'	'	'	0.1	'	'	'
Ending Balance at Dec. 31, 2013	$574.10	'	$11.50	'	$409.10	$48.60	$104.90	'	'	'

Business_and_Basis_of_Presenta

Business and Basis of Presentation	12 Months Ended
	Dec. 31, 2013
Business and Basis of Presentation [Abstract]	'
Business and Basis of Presentation	'
	Business and Basis of Presentation
	Description of the Business
	Phillips 66 Partners LP (the Partnership) is a Delaware limited partnership formed on February 20, 2013, by Phillips 66 Company and Phillips 66 Partners GP LLC, both wholly owned subsidiaries of Phillips 66. A registration statement on Form S-1, as amended through the time of its effectiveness, was filed by the Partnership with the U.S. Securities and Exchange Commission (SEC) and was declared effective on July 22, 2013. On July 23, 2013, Phillips 66 Partners common units began trading on the New York Stock Exchange under the symbol “PSXP.” On July 26, 2013, the Partnership completed its initial public offering (the Offering) of 18,888,750 common units (including 2,463,750 common units issued pursuant to the exercise of the underwriters' over-allotment option) representing limited partner interests. After completion of the Offering, the Partnership includes the assets, liabilities and results of operations of certain crude oil and refined petroleum product pipeline systems and associated terminal and storage assets, previously operated and owned by Phillips 66 (as described in more detail below). Prior to the Offering, the assets, liabilities and results of operations of the aforementioned assets related to Phillips 66 Partners LP Predecessor. Unless otherwise stated or the context otherwise indicates, all references to "Phillips 66 Partners," " the Partnership," "us," "our," "we," or similar expressions for time periods prior to the Offering refer to Phillips 66 Partners LP Predecessor, "our Predecessor" for accounting purposes. For time periods subsequent to the Offering, these terms refer to the legal entity Phillips 66 Partners LP.
	On April 30, 2012, ConocoPhillips completed the separation of its downstream businesses into Phillips 66. Accordingly, prior to April 30, 2012, the parent company of our Predecessor was ConocoPhillips, and subsequent to April 30, 2012, the parent company of our Predecessor has been Phillips 66. For ease of reference, we refer to Phillips 66 as our Predecessor's parent for the periods prior to April 30, 2012. For purposes of related party transactions, ConocoPhillips is not considered a related party for periods after April 30, 2012.
	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.
	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. Since we do not own any of the crude oil or refined petroleum products that we handle and do not engage in the trading of crude oil or 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. Our operations consist of one reportable segment.
	Basis of Presentation
	For the periods prior to the closing of the Offering on July 26, 2013, the financial statements included in this Annual Report on Form 10-K were derived from the financial statements and accounting records of Phillips 66. These financial statements reflect the combined historical results of operations, financial position and cash flows of our assets as if such businesses had been combined for all periods presented. All intercompany transactions and accounts within our Predecessor have been eliminated. The assets and liabilities in these financial statements have been reflected on a historical cost basis, because immediately prior to the Offering, all of the assets and liabilities presented were wholly owned by Phillips 66 and were transferred within the Phillips 66 consolidated group. The statement of income for the periods prior to the Offering includes expense allocations for certain functions historically performed by Phillips 66 and not previously allocated to our assets, 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 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 statements for periods prior to the Offering 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.
	Phillips 66 uses a centralized approach to the cash management and financing of its operations. For periods prior to the Offering, cash generated and used by our operations was transferred to Phillips 66 daily, and Phillips 66 funded our operating and investing activities as needed. Accordingly, the cash and cash equivalents held by Phillips 66 were not allocated to us, and we had no bank accounts. We reflected transfers of cash to and from Phillips 66’s cash management system as a component of “Net investment” on our balance sheet, and as part of “Net distributions to Phillips 66—prior to initial public offering” on our statement of cash flows. We did not include any interest expense for intercompany cash advances from Phillips 66, since historically Phillips 66 did not allocate interest expense related to intercompany advances to any of its businesses. For periods after the Offering, we have our own bank accounts and no longer participate in Phillips 66’s centralized cash management system.
	All financial information presented for the periods after the Offering represents the consolidated results of operations, financial position and cash flows of the Partnership. Accordingly:
	•	Our consolidated statements of income and cash flows for the year ended December 31, 2013, consist of the consolidated results of the Partnership for the period from July 26, 2013, through December 31, 2013, and the combined results of our Predecessor for the period from January 1, 2013, through July 25, 2013. Our consolidated statements of income and cash flows for the years ended December 31, 2012 and 2011, consists entirely of the combined results of our Predecessor.
	•	Our consolidated balance sheet at December 31, 2013, consists of the consolidated balances of the Partnership, while at December 31, 2012, it consists of the combined balances of our Predecessor.
	•	Our consolidated statement of changes in equity for the year ended December 31, 2013, consists of both the combined activity for our Predecessor prior to July 26, 2013, and the consolidated activity for the Partnership completed at and subsequent to the Offering on July 26, 2013. Our consolidated statement of changes in equity for the years ended December 31, 2012 and 2011, consists entirely of the combined activity of our Predecessor.

Summary_of_Significant_Accouti

Summary of Significant Accouting Policies	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Summary of Significant Accouting Policies	'
	Summary of Significant Accounting Policies
	•	Consolidation Principles and Investments—Our consolidated financial statements include the accounts of majority-owned subsidiaries. All intercompany transactions and accounts have been eliminated.
	•	Net Investment—In the consolidated balance sheet, net investment represents Phillips 66’s historical investment in us, our accumulated net earnings after taxes, and the net effect of transactions with, and allocations from, Phillips 66.
	•	Use of Estimates—The preparation of financial statements in conformity with accounting principles generally accepted in the United States (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and the disclosures of contingent assets and liabilities. Actual results could differ from these estimates.
	•	Revenue Recognition—Revenue is recognized for crude oil and refined petroleum product pipeline transportation based on the delivery of actual volumes transported at contractual tariff rates. Revenue is recognized for crude oil and refined petroleum product terminaling and storage as performed based on contractual rates related to throughput volumes or cost-plus-margin arrangements. Substantially all of our revenue was derived from Phillips 66, and the contractual rates do not necessarily reflect market rates for the historical periods presented prior to the Offering.
	Effective January 1, 2013, the structure of the fees we charge Phillips 66 for terminaling services provided at the Clifton Ridge terminal was changed. During 2012 and 2011, terminaling fees were on a cost-plus-margin reimbursement basis. Beginning in 2013, the cost-plus-margin arrangement was replaced with various storage, dock and truck unloading fees.
	Transportation contracts that are operating leases and include rentals with fixed escalation are recognized on a straight-line basis over the lease term. Any difference between the transportation fee recognized under the straight-line method and the transportation fee received in cash is deferred to the consolidated balance sheet as “Deferred rentals.” If the underlying transportation contract is amended to eliminate fixed escalation, the balance of deferred rentals is amortized over the remaining life of the contract.
	In connection with the Offering, we entered into certain transportation services agreements and terminal services agreements with Phillips 66 that are considered operating leases under GAAP. See Note 16—Related Party Transactions, for additional information on these agreements. These agreements include escalation clauses to adjust transportation tariffs and terminaling fees to reflect changes in price indices. Revenues from these agreements are recorded within "Transportation and terminaling services—related parties" on our consolidated statement of income.
	•	Cash Equivalents—Cash equivalents are highly liquid, short-term investments that are readily convertible to known amounts of cash and have original maturities of 90 days or less from their date of purchase. They are carried at cost plus accrued interest, which approximates fair value.
	•	Imbalances—We do not purchase or produce crude oil or refined petroleum product inventories. We experience imbalances as a result of variances in meter readings and in other measurement methods, and volume fluctuations within our crude oil system due to pressure and temperature changes. Certain of our transportation contracts provide for the shipper to pay a contractual loss allowance, which is valued using quoted market prices of the applicable commodity being shipped. These loss allowances, which are received from the shipper irrespective of, and calculated independently from, actual volumetric gains or losses, are recorded as revenue. Any volumetric gains or losses are valued using quoted market prices of the applicable commodities and are recorded as decreases or increases to operating and maintenance expenses, respectively.
	•	Fair Value Measurements—We measure assets and liabilities requiring fair value presentation using an exit price (i.e., the price that would be received to sell an asset or paid to transfer a liability) and disclose such amounts according to the quality of valuation inputs under the following hierarchy:
	Level 1: Quoted prices in an active market for identical assets or liabilities.
	Level 2: Inputs other than quoted prices that are directly or indirectly observable.
	Level 3: Unobservable inputs that are significant to the fair value of assets or liabilities.
	The classification of an asset or liability is based on the lowest level of input significant to its fair value. Those that are initially classified as Level 3 are subsequently reported as Level 2 when the fair value derived from unobservable inputs is inconsequential to the overall fair value, or if corroborated market data becomes available. Assets and liabilities that are initially reported as Level 2 are subsequently reported as Level 3 if corroborated market data is no longer available. We had no assets or liabilities requiring remeasurement to or disclosure of fair value at December 31, 2013, or at December 31, 2012.
	Recurring Fair Value Measurements—Fair values of our accounts receivable and accounts payable approximate their carrying values due to the short-term nature of these instruments. Our financial assets and liabilities would be classified in their entirety based on the lowest level of input that is significant to the fair value measurement.
	Nonrecurring Fair Value Measurements—Fair value measurements are applied with respect to our nonfinancial assets and liabilities measured on a nonrecurring basis, which consists primarily of asset retirement obligations. Nonrecurring fair value measurements are also applied, when applicable, to determine the fair value of our long-lived assets.
	•	Accounts Receivable—Prior to the Offering, our receivables primarily consisted of third-party customer accounts receivable that were recorded at the invoiced amounts and did not bear interest. Intercompany receivables with Phillips 66 were included in “Net investment” on the consolidated balance sheet. Please see Note 1—Business and Basis of Presentation, for a discussion of Phillips 66’s centralized cash management system. Subsequent to the Offering, our receivables primarily consist of accounts receivable from related parties that are recorded at the invoiced amounts and do not bear interest. Account balances for these receivables are charged directly to bad debt expense when it becomes probable the receivable will not be collected.
	•	Properties, Plants and Equipment (PP&E)—PP&E are stated at cost. Costs of maintenance and repairs, which are not significant improvements, are expensed when incurred. Depreciation of PP&E is determined by either the individual-unit-straight-line method or the group-straight-line method (for those individual units that are highly integrated with other units).
	•	Major Maintenance Activities—Costs for planned integrity management projects are expensed in the period incurred. These types of costs include pipe and tank inspection services, contractor repair services, materials and supplies, equipment rentals and our labor costs.
	•	Impairment of Long-Lived Assets—PP&E used in operations are assessed for impairment whenever changes in facts and circumstances indicate a possible significant deterioration in the future cash flows expected to be generated by an asset group. If, upon review, the sum of the undiscounted pretax cash flows is less than the carrying value of the asset group, then the carrying value is written down to estimated fair value through additional depreciation provisions and reported as impairments in the periods in which the determination of the impairment is made. Individual assets are grouped for impairment purposes at the lowest level for which identifiable cash flows are largely independent of the cash flows of other groups of assets—generally at the pipeline or terminal level. Because there usually is a lack of quoted market prices for our long-lived assets, the fair value of potentially impaired assets is typically determined based on the present values of expected future cash flows using discount rates believed to be consistent with those used by principal market participants or based on a multiple of operating cash flow validated with historical market transactions of similar assets where possible.
	The expected future cash flows used for impairment reviews and related fair value calculations are based on estimated future throughputs, prices, operating costs, tariffs, and capital project decisions, considering all available evidence at the date of review.
	•	Goodwill—Goodwill represents the excess of the purchase price over the estimated fair value of the net assets acquired in the acquisition of a business. Goodwill is not amortized, but rather is tested for impairment annually and when events or changes in circumstances indicate that the fair value of the reporting unit with goodwill has been reduced below carrying value. The fair value of the reporting unit is compared to the book value of the reporting unit. If the fair value is less than book value, including goodwill, then the recorded goodwill is written down to its implied fair value with a charge to earnings. We have determined we have one reporting unit for testing goodwill for impairment.
	•	Asset Retirement Obligations and Environmental Costs—Fair values of legal obligations to retire and remove long-lived assets are recorded in the period in which the obligation is incurred. When the liability is initially recorded, we capitalize this cost by increasing the carrying amount of the related PP&E. Over time, the liability is increased for the change in its present value, and the capitalized cost in PP&E is depreciated over the useful life of the related asset or group of assets.
	Environmental expenditures are expensed or capitalized, depending upon their future economic benefit. Expenditures relating to an existing condition caused by past operations, and those having no future economic benefit, are expensed. Liabilities for environmental expenditures are recorded on an undiscounted basis (unless acquired in a purchase business combination) when environmental assessments or cleanups are probable and the costs can be reasonably estimated. Recoveries of environmental remediation costs from other parties, such as state reimbursement funds, are recorded as assets when their receipt is probable and estimable.
	•	Employee Benefit Plans—The employees supporting our operations are employees of Phillips 66 and its affiliates. Phillips 66 sponsors various employee pension and postretirement health insurance plans. For purposes of these consolidated financial statements, we are accounting for our participation in these benefit plans as multiemployer plans. We recognize as expense in each period an allocation from Phillips 66 for our share of payroll costs and employee benefit plan costs, and we do not recognize any employee benefit plan assets or liabilities. While we are accounting for our participation as multiemployer plans for the purposes of presenting these consolidated financial statements, those benefit plans are not technically multiemployer plans. Therefore, we have not included the disclosures required for multiemployer plans.
	•	Income Taxes—We follow the asset and liability method of accounting for income taxes. Under this method, deferred income taxes are recognized for the tax consequences of temporary differences between the financial statement carrying amounts and the tax basis of the assets and liabilities. Our taxable income was included in the consolidated U.S. federal income tax returns of Phillips 66 and in a number of consolidated state income tax returns. Subsequent to the Offering, our operations are treated as a partnership for federal and state income tax purposes, with each partner being separately taxed on its share of the taxable income. Therefore, we have excluded income taxes from these consolidated financial statements, except for the income tax provision resulting from state laws that apply to entities organized as partnerships. With regard to Texas, our tax provision is computed as if we were a stand-alone tax paying entity. Interest related to unrecognized tax benefits is included in interest and debt expense, and penalties are included in operating and maintenance expenses.
	•	Comprehensive Income—We have not reported comprehensive income due to the absence of items of other comprehensive income in the periods presented.
	•	Unit-Based Compensation—The fair value of phantom unit awards granted to non-employee directors is based on the fair market value of Phillips 66 Partners LP common units on the date of grant. Our unit-based compensation expenses are recognized at the time of grant for phantom units since they vest immediately and are not forfeitable.

Initial_Public_Offering

Initial Public Offering	12 Months Ended
	Dec. 31, 2013
Initial Public Offering [Abstract]	'
Initial Public Offering	'
	Initial Public Offering
	On July 23, 2013, the Partnership's common units began trading on the New York Stock Exchange under the symbol "PSXP." On July 26, 2013, the Partnership completed the Offering of 18,888,750 common units to the public at a price of $23.00 per unit, which included a 2,463,750 common unit over-allotment option that was fully exercised by the underwriters.
	In exchange for the assets contributed to us, Phillips 66 received:
	•	16,328,362 common units and 35,217,112 subordinated units, representing an aggregate 71.7 percent limited partner interest.
	•	All of the incentive distribution rights.
	•	1,437,433 general partner units, representing a 2.0 percent general partner interest.
	The Partnership received net proceeds of $404.4 million from the sale of the common units to the public, after deducting underwriting discounts and commissions, structuring fees and other offering costs of $30.0 million. The Partnership retained the net proceeds from the Offering for general partnership purposes, including potential future acquisitions from Phillips 66 and third parties, as well as potential future expansion capital expenditures.

Major_Customer_and_Concentrati

Major Customer and Concentration of Credit Risk	12 Months Ended
	Dec. 31, 2013
Major Customer and Concentration of Credit Risk [Abstract]	'
Concentration Risk Disclosure	'
	Major Customer and Concentration of Credit Risk
	Phillips 66 accounted for 97 percent, 97 percent and 98 percent of our total revenues for the years ended December 31, 2013, 2012 and 2011, respectively. We provide crude oil and refined petroleum product pipeline transportation, terminaling and storage services to Phillips 66 and other related parties.
	We are potentially exposed to concentration of credit risk primarily through our accounts receivable with Phillips 66. These receivables have payment terms of 30 days or less. We monitor the creditworthiness of Phillips 66, which has an investment grade credit rating, and we have no history of collectability issues with them.

Properties_Plants_and_Equipmen

Properties, Plants and Equipment	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Properties, Plants and Equipment	'
	Properties, Plants and Equipment
	Our investment in PP&E, with the associated accumulated depreciation, at December 31 was:
		Estimated Useful Lives	Millions of Dollars
			2013			2012
	Cost:
	Land	N/A	$	4		4
	Buildings and improvements	3 to 30 years	6.1			5.4
	Pipelines and related assets	15 to 45 years	36.2			35.9
	Terminals and related assets	25 to 45 years	165.1			161.2
	Construction-in-progress	N/A	3.1			1.7
	Gross PP&E		214.5			208.2
	Less: accumulated depreciation		(78.6		)	(72.4	)
	Net PP&E		$	135.9		135.8

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2013
Goodwill [Abstract]	'
Goodwill Disclosure	'
	Goodwill
	Goodwill was allocated to us from Phillips 66 based on the relative fair market value of our net PP&E, compared with the fair market value of Phillips 66’s reporting unit that included our net PP&E as of the date on which Phillips 66’s purchase transaction that resulted in goodwill was completed. Goodwill is tested for impairment on an annual basis and when indicators of potential impairment exist. We have performed our annual impairment tests, and no impairment in the carrying value of goodwill has been identified for the years ended December 31, 2013, 2012 and 2011. Goodwill was $2.5 million as of December 31, 2013 and 2012.

Assets_Retirement_Obligations_

Assets Retirement Obligations and Accrued Environmental Costs	12 Months Ended
	Dec. 31, 2013
Assets Retirement Obligations and Accrued Environmental Costs [Abstract]	'
Asset Retirement Obligations and Environmental Cost	'
	Asset Retirement Obligations and Accrued Environmental Costs
	Asset retirement obligations and accrued environmental costs at December 31 were:
		Millions of Dollars
		2013		2012
	Asset retirement obligations	$	0.4	0.3
	Accrued environmental costs	—		0.3
	Total asset retirement obligations and accrued environmental costs	0.4		0.6
	Asset retirement obligations and accrued environmental costs due within one year*	—		(0.1	)
	Long-term asset retirement obligations and accrued environmental costs	$	0.4	0.5
	*Classified as a current liability on the balance sheet, under the caption “Other current liabilities.”
	Asset Retirement Obligations
	We have asset removal obligations that we are required to perform under law or contract once an asset is permanently taken out of service. These obligations primarily relate to the abandonment or removal of pipeline. Most of these obligations are not expected to be paid until many years in the future.
	During 2013 and 2012, our overall asset retirement obligations changed as follows:
		Millions of Dollars
		2013		2012
	Balance at January 1	$	0.3	0.4
	Accretion of discount	—		—
	Changes in estimates of existing obligations	0.1		(0.1	)
	Balance at December 31	$	0.4	0.3
	We do not expect any short-term spending and, as a result, there were no current liabilities reported on the consolidated balance sheet for asset retirement obligations at December 31, 2013 and 2012.
	Accrued Environmental Costs
	At December 31, 2012, our Predecessor recorded a total environmental accrual of $0.3 million, including accrued environmental costs of $0.1 million in “Other current liabilities” on the consolidated balance sheet, primarily related to cleanup and remediation at terminal locations. Pursuant to our omnibus agreement, Phillips 66 indemnifies us for these environmental liabilities. At December 31, 2013, we did not have any accrued environmental liabilities. In the future, we may be involved in environmental assessments, cleanups and proceedings.

Net_Income_Per_Limited_Partner

Net Income Per Limited Partner Unit	12 Months Ended
	Dec. 31, 2013
Partners' Capital Notes [Abstract]	'
Net Income Per Limited Partner Unit	'
	Net Income Per Limited Partner Unit
	Net income per unit applicable to common limited partner units and to subordinated limited partner units is computed by dividing the respective limited partners’ interest in net income for the period subsequent to the Offering 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 when calculating the net income per unit applicable to limited partners. The classes of participating securities include common units, subordinated units, general partner units, and incentive distribution rights. Basic and diluted net income per unit are the same because we do not have any potentially dilutive units outstanding for the period presented.
		Millions of Dollars
		2013
	Net income subsequent to the Offering	$	28.9
	Less: General partner’s distributions declared	0.5
	Limited partners' distributions declared on common units	13.4
	Limited partner's distributions declared on subordinated units	13.4
	Distributions less than net income subsequent to the Offering	$	1.6
		2013
		General Partner		Limited Partners' Common Units		Limited Partner's Subordinated Units	Total
	Net income subsequent to the Offering: (millions)
	Distributions declared	$	0.5	13.4		13.4	27.3
	Distributions less than net income subsequent to the Offering	0.1		0.7		0.8	1.6
	Net income subsequent to the Offering	$	0.6	14.1		14.2	28.9
	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			$	0.4	0.4
	Diluted			0.4		0.4
	On January 22, 2014, the Board of Directors of our general partner declared our quarterly cash distribution of $0.2248 per unit, or $16.2 million in total, for the fourth quarter of 2013. This distribution was paid on February 13, 2014, to unitholders of record as of February 4, 2014.

Debt

Debt	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Debt	'
	Debt
	On June 7, 2013, we entered into a $250 million senior unsecured revolving credit agreement (Credit Agreement) with a syndicate of financial institutions, which became effective upon the closing of the Offering on July 26, 2013. We have the option to increase the overall capacity of the Credit Agreement by up to an additional $250 million, subject to, among other things, the consent of the existing lenders whose commitments would be increased or any additional lenders providing such additional capacity. The Credit Agreement has an initial five-year term beginning on the day we entered into the Credit Agreement, and we have the option to extend for two additional one-year terms, subject to certain conditions, including the consent of the lenders holding the majority of the commitments and each lender extending its individual commitment. The Credit Agreement includes sub-facilities for swingline loans and letters of credit.
	Outstanding borrowings under the Credit Agreement will bear interest, at our option, at either: (a) the Eurodollar rate in effect from time to time plus the applicable margin; or (b) the base rate (as described in the Credit Agreement) plus the applicable margin. The Credit Agreement also provides for customary fees, including administrative agent fees and commitment fees. Commitment fees began to accrue beginning on the date we entered into the Credit Agreement. Prior to our obtaining credit ratings, if ever, the pricing levels for the commitment fee and interest-rate margins will be based on our ratio of total debt to EBITDA (as described in the Credit Agreement) for the prior four fiscal quarters. After we obtain credit ratings, if ever, the pricing levels will be based on our credit ratings in effect from time to time. The Credit Agreement contains representations and warranties, affirmative and negative covenants and events of default that we consider to be customary for an agreement of this type, including a covenant that requires us to maintain a ratio of total debt to EBITDA for the prior four fiscal quarters of not greater than 5.0 to 1.0 as of the last day of each fiscal quarter (5.5 to 1.0 during the specified period following certain acquisitions). If an event of default occurs under the Credit Agreement and is continuing, the lenders may terminate their commitments and declare the amount of all outstanding borrowings, together with accrued interest and all fees, to be immediately due and payable. Among other things and until such time as we have an investment grade rating, we would not be able to make any cash distributions to our unitholders for so long as an event of default is continuing. As of December 31, 2013, no amount had been drawn under the Credit Agreement.

Contingencies

Contingencies	12 Months Ended
	Dec. 31, 2013
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.
	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 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. When we prepare our consolidated financial statements, 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 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. See Note 7—Asset Retirement Obligations and Accrued Environmental Costs, for a summary of our accrued environmental liabilities.
	Legal Proceedings
	Under our 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 December 31, 2013, we did not have any accrued contingent liabilities.
	Indemnification
	Under our 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 our assets prior to the closing of the Offering. Indemnification for any unknown environmental liabilities 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 (other than currently pending legal actions) is subject to an aggregate deductible of $0.2 million before we are entitled to indemnification. Phillips 66 will also indemnify us 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 our assets that occur on or after the closing of the Offering and for certain environmental liabilities related to our assets to the extent Phillips 66 is not required to indemnify us.

Leases

Leases	12 Months Ended
	Dec. 31, 2013
Leases [Abstract]	'
Leases	'
	Leases
	In connection with the Offering, we entered into certain transportation services agreements and terminal services agreements with Phillips 66 that are considered operating leases under GAAP. See Note 16—Related Party Transactions, for additional information on these agreements. These agreements include escalation clauses to adjust transportation tariffs and terminaling fees to reflect changes in price indices. Revenues from these agreements are recorded within "Transportation and terminaling services—related parties" on our consolidated statement of income.
	As of December 31, 2013, future minimum payments to be received related to these agreements were estimated to be:
		Millions of Dollars
	2014	$	95.5
	2015	95.5
	2016	95.7
	2017	95.5
	2018	76.8
	2019 and thereafter	350.4
	Total	$	809.4

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2013
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. Prior to the Offering, costs associated with benefit plans included the cost allocated to us from Phillips 66's transportation organization and for employees of Phillips 66 who were fully dedicated to supporting our business. Our Predecessor recorded its share of pension and postretirement costs of $0.6 million for the period from January 1, 2013, to July 25, 2013, and $1.1 million for each of the years ended December 31, 2012 and 2011. Our Predecessor's share of defined contribution benefit plan costs for the period from January 1, 2013, through July 25, 2013, was $0.3 million, and for the years ended December 31, 2012 and 2011, was $0.9 million and $0.3 million, respectively. Subsequent to the Offering, costs associated with benefit plans consist of the cost for employees of Phillips 66 who are fully dedicated to supporting our business. These costs were $0.1 million for the period from July 26, 2013, to December 31, 2013.
	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.

UnitBased_Compensation

Unit-Based Compensation	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Unit-Based Compensation	'
	Unit-Based Compensation
	The Board of Directors of our general partner adopted the Phillips 66 Partners LP 2013 Incentive Compensation Plan (the ICP) in the third quarter of 2013.  Awards under the ICP are available for officers, directors and employees of the general partner or its affiliates, and any consultants or other individuals who perform services for the Partnership.  The ICP allows for the grant of unit awards, restricted units, phantom units, unit options, unit appreciation rights, distribution equivalent rights, profits interest units and other unit-based awards.  The ICP limits the number of common units that may be delivered pursuant to awards to 2,500,000, subject to proportionate adjustment in the event of unit splits and similar events.
	Through December 31, 2013, we issued only phantom units under the ICP.  A phantom unit entitles the recipient to receive cash equal to the fair market value of a common unit on the settlement date, and to also receive a distribution equivalent each quarter between the grant date and the settlement date in an amount of cash equal to any cash distributions paid on a common unit during that time.  In September 2013, we granted 2,171 phantom units to three non-employee directors of the general partner of Phillips 66 Partners. Phantom units granted to non-employee directors vest immediately on the grant date, because they are non-forfeitable.  These phantom units do not convey voting rights.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
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.
	Income taxes charged to income were:
		Millions of Dollars
		2013		2012	2011
	Current	$	0.4	0.3	0.3
	Deferred	0.1		—	—
	Total	$	0.5	0.3	0.3
	Deferred income taxes reflect the net tax effect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and tax purposes. At December 31, 2013, we had a deferred tax liability of $0.1 million primarily related to PP&E and deferred rentals. Our effective tax rate was 0.8 percent, 0.7 percent and 0.8 percent, respectively, for the years ended December 31, 2013, 2012 and 2011.
	As of December 31, 2013, we had no liability reported for unrecognized tax benefits and we did not have any interest or penalties related to income taxes for the years ended December 31, 2013, 2012 and 2011. Texas and Illinois tax returns for 2013 are subject to examination.

Cash_Flow_Information

Cash Flow Information	12 Months Ended
	Dec. 31, 2013
Supplemental Cash Flow Information [Abstract]	'
Cash Flow Information	'
	Cash Flow Information
		Millions of Dollars
		2013		2012	2011
	Cash Payments
	Interest and debt expense	$	0.3	—	—
	Income taxes*	—		—	—
	*Excludes our share of cash tax payments made directly by Phillips 66 prior to the Offering on July 26, 2013.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	Related Party Transactions
	Commercial Agreements
	We entered into multiple commercial agreements with Phillips 66 and amended an existing commercial agreement with Phillips 66 at the closing of the Offering. 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.
	The commercial 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 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.
	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 two additional five-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 five-year initial term, and Phillips 66 has the option to renew each agreement for up to three additional five-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 commitment. We may elect to adjust our tariffs on an annual basis and the new tariffs become effective in July of each year. Under each of our transportation services agreements other than our Hartford Connector T&D, if we agree to make any capital 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 commitment on certain terminaling services during any quarter, then Phillips 66 will pay us a deficiency payment based on the calculation described in each agreement. Beginning on January 1, 2014, we may adjust our per-barrel fees annually on January 1 of each year.
	These commercial 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 operations at a refinery prior to the expiration of the 12-month notice period, and, under all of our commercial agreements, these events 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.
	In connection with the Offering, we also entered into naphtha storage services agreements with WRB Refining LP and Phillips 66. Under these agreements, we will provide certain storage, sampling and testing services and such other services as we and WRB or Phillips 66, as applicable, may mutually agree upon from time to time, and WRB and Phillips 66 commit to provide us with minimum storage volumes of naphtha at our Hartford terminal.
	With respect to periods prior to the Offering, our Predecessor was part of the consolidated operations of Phillips 66, and substantially all of our Predecessor's 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. With effect from the Offering, we entered into several commercial agreements with Phillips 66 as discussed above, under which Phillips 66 pays us fees for transporting, terminaling and storing crude oil and refined products.
	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.
	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 our 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.
	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 general and administrative expenses and operating and maintenance expenses were:
		Millions of Dollars
		2013		2012	2011
	General and administrative expenses	$	9.9	7.8	5.6
	Operating and maintenance expenses	10		8.8	7.6
	Total	$	19.9	16.6	13.2
	Our management believes the charges allocated to our Predecessor prior to the Offering were a reasonable reflection of the utilization of services provided. However, those allocations may not have fully reflected the expenses that would have been incurred had we been a stand-alone publicly traded partnership for periods prior to the Offering.
	Subsequent to the Offering, we pay Phillips 66 an operational and administrative support fee under the terms of the omnibus agreement, initially in the amount of $13.7 million (payable in equal monthly installments and prorated for the first year of service), 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 behalf of us, pursuant to the terms in our omnibus agreement. Under our operational services agreement, we reimburse Phillips 66 for the provision of certain operational services to us in support of our pipelines, terminaling and storage facilities. Additionally, we pay Phillips 66 for insurance services provided to us. Operating and maintenance expenses also included volumetric gains/losses associated with volumes transported by Phillips 66. The classification of these charges between general and administrative expenses and operating and maintenance expenses is based on the functional nature of the services being performed for our operations.

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	Subsequent Events
	On February 13, 2014, we entered into an agreement to acquire certain transportation, terminaling and storage assets from Phillips 66 for a total consideration of $700 million. These assets consist of Phillips 66’s Gold Product Pipeline System and the Medford Spheres, two newly constructed refinery-grade propylene storage spheres. We expect to finance the acquisition with cash on hand of $400 million, the issuance of additional units valued at $140 million, and the assumption of a 5-year, $160 million note payable to a subsidiary of Phillips 66. The number of additional units will be based on the average daily closing price of our common units for the 10 trading days prior to February 13, 2014, or $38.86 per unit, with 98 percent issued as common units and 2 percent issued as general partner units. The transaction is targeted to occur on March 1, 2014.

Summary_of_Significant_Accouti1

Summary of Significant Accouting Policies Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Summary of Significant Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	For the periods prior to the closing of the Offering on July 26, 2013, the financial statements included in this Annual Report on Form 10-K were derived from the financial statements and accounting records of Phillips 66. These financial statements reflect the combined historical results of operations, financial position and cash flows of our assets as if such businesses had been combined for all periods presented. All intercompany transactions and accounts within our Predecessor have been eliminated. The assets and liabilities in these financial statements have been reflected on a historical cost basis, because immediately prior to the Offering, all of the assets and liabilities presented were wholly owned by Phillips 66 and were transferred within the Phillips 66 consolidated group. The statement of income for the periods prior to the Offering includes expense allocations for certain functions historically performed by Phillips 66 and not previously allocated to our assets, 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 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 statements for periods prior to the Offering 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.
	Phillips 66 uses a centralized approach to the cash management and financing of its operations. For periods prior to the Offering, cash generated and used by our operations was transferred to Phillips 66 daily, and Phillips 66 funded our operating and investing activities as needed. Accordingly, the cash and cash equivalents held by Phillips 66 were not allocated to us, and we had no bank accounts. We reflected transfers of cash to and from Phillips 66’s cash management system as a component of “Net investment” on our balance sheet, and as part of “Net distributions to Phillips 66—prior to initial public offering” on our statement of cash flows. We did not include any interest expense for intercompany cash advances from Phillips 66, since historically Phillips 66 did not allocate interest expense related to intercompany advances to any of its businesses. For periods after the Offering, we have our own bank accounts and no longer participate in Phillips 66’s centralized cash management system.
	All financial information presented for the periods after the Offering represents the consolidated results of operations, financial position and cash flows of the Partnership. Accordingly:
	•	Our consolidated statements of income and cash flows for the year ended December 31, 2013, consist of the consolidated results of the Partnership for the period from July 26, 2013, through December 31, 2013, and the combined results of our Predecessor for the period from January 1, 2013, through July 25, 2013. Our consolidated statements of income and cash flows for the years ended December 31, 2012 and 2011, consists entirely of the combined results of our Predecessor.
	•	Our consolidated balance sheet at December 31, 2013, consists of the consolidated balances of the Partnership, while at December 31, 2012, it consists of the combined balances of our Predecessor.
	•	Our consolidated statement of changes in equity for the year ended December 31, 2013, consists of both the combined activity for our Predecessor prior to July 26, 2013, and the consolidated activity for the Partnership completed at and subsequent to the Offering on July 26, 2013. Our consolidated statement of changes in equity for the years ended December 31, 2012 and 2011, consists entirely of the combined activity of our Predecessor.
Consolidation Principles and Investments	'
	Consolidation Principles and Investments—Our consolidated financial statements include the accounts of majority-owned subsidiaries. All intercompany transactions and accounts have been eliminated.
Net Investment	'
	Net Investment—In the consolidated balance sheet, net investment represents Phillips 66’s historical investment in us, our accumulated net earnings after taxes, and the net effect of transactions with, and allocations from, Phillips 66.
Use of Estimates	'
	Use of Estimates—The preparation of financial statements in conformity with accounting principles generally accepted in the United States (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and the disclosures of contingent assets and liabilities. Actual results could differ from these estimates.
Revenue Recognition	'
	Revenue Recognition—Revenue is recognized for crude oil and refined petroleum product pipeline transportation based on the delivery of actual volumes transported at contractual tariff rates. Revenue is recognized for crude oil and refined petroleum product terminaling and storage as performed based on contractual rates related to throughput volumes or cost-plus-margin arrangements. Substantially all of our revenue was derived from Phillips 66, and the contractual rates do not necessarily reflect market rates for the historical periods presented prior to the Offering.
	Effective January 1, 2013, the structure of the fees we charge Phillips 66 for terminaling services provided at the Clifton Ridge terminal was changed. During 2012 and 2011, terminaling fees were on a cost-plus-margin reimbursement basis. Beginning in 2013, the cost-plus-margin arrangement was replaced with various storage, dock and truck unloading fees.
	Transportation contracts that are operating leases and include rentals with fixed escalation are recognized on a straight-line basis over the lease term. Any difference between the transportation fee recognized under the straight-line method and the transportation fee received in cash is deferred to the consolidated balance sheet as “Deferred rentals.” If the underlying transportation contract is amended to eliminate fixed escalation, the balance of deferred rentals is amortized over the remaining life of the contract.
	In connection with the Offering, we entered into certain transportation services agreements and terminal services agreements with Phillips 66 that are considered operating leases under GAAP. See Note 16—Related Party Transactions, for additional information on these agreements. These agreements include escalation clauses to adjust transportation tariffs and terminaling fees to reflect changes in price indices. Revenues from these agreements are recorded within "Transportation and terminaling services—related parties" on our consolidated statement of income.
Cash Equivalents	'
	Cash Equivalents—Cash equivalents are highly liquid, short-term investments that are readily convertible to known amounts of cash and have original maturities of 90 days or less from their date of purchase. They are carried at cost plus accrued interest, which approximates fair value.
Imbalances	'
	Imbalances—We do not purchase or produce crude oil or refined petroleum product inventories. We experience imbalances as a result of variances in meter readings and in other measurement methods, and volume fluctuations within our crude oil system due to pressure and temperature changes. Certain of our transportation contracts provide for the shipper to pay a contractual loss allowance, which is valued using quoted market prices of the applicable commodity being shipped. These loss allowances, which are received from the shipper irrespective of, and calculated independently from, actual volumetric gains or losses, are recorded as revenue. Any volumetric gains or losses are valued using quoted market prices of the applicable commodities and are recorded as decreases or increases to operating and maintenance expenses, respectively.
Fair Value Measurements	'
	Fair Value Measurements—We measure assets and liabilities requiring fair value presentation using an exit price (i.e., the price that would be received to sell an asset or paid to transfer a liability) and disclose such amounts according to the quality of valuation inputs under the following hierarchy:
	Level 1: Quoted prices in an active market for identical assets or liabilities.
	Level 2: Inputs other than quoted prices that are directly or indirectly observable.
	Level 3: Unobservable inputs that are significant to the fair value of assets or liabilities.
	The classification of an asset or liability is based on the lowest level of input significant to its fair value. Those that are initially classified as Level 3 are subsequently reported as Level 2 when the fair value derived from unobservable inputs is inconsequential to the overall fair value, or if corroborated market data becomes available. Assets and liabilities that are initially reported as Level 2 are subsequently reported as Level 3 if corroborated market data is no longer available. We had no assets or liabilities requiring remeasurement to or disclosure of fair value at December 31, 2013, or at December 31, 2012.
	Recurring Fair Value Measurements—Fair values of our accounts receivable and accounts payable approximate their carrying values due to the short-term nature of these instruments. Our financial assets and liabilities would be classified in their entirety based on the lowest level of input that is significant to the fair value measurement.
	Nonrecurring Fair Value Measurements—Fair value measurements are applied with respect to our nonfinancial assets and liabilities measured on a nonrecurring basis, which consists primarily of asset retirement obligations. Nonrecurring fair value measurements are also applied, when applicable, to determine the fair value of our long-lived assets.
Accounts Receivable	'
	Accounts Receivable—Prior to the Offering, our receivables primarily consisted of third-party customer accounts receivable that were recorded at the invoiced amounts and did not bear interest. Intercompany receivables with Phillips 66 were included in “Net investment” on the consolidated balance sheet. Please see Note 1—Business and Basis of Presentation, for a discussion of Phillips 66’s centralized cash management system. Subsequent to the Offering, our receivables primarily consist of accounts receivable from related parties that are recorded at the invoiced amounts and do not bear interest. Account balances for these receivables are charged directly to bad debt expense when it becomes probable the receivable will not be collected.
Properties, Plants and Equipment (PP&E)	'
	Properties, Plants and Equipment (PP&E)—PP&E are stated at cost. Costs of maintenance and repairs, which are not significant improvements, are expensed when incurred. Depreciation of PP&E is determined by either the individual-unit-straight-line method or the group-straight-line method (for those individual units that are highly integrated with other units).
Major Maintenance Activities	'
	Major Maintenance Activities—Costs for planned integrity management projects are expensed in the period incurred. These types of costs include pipe and tank inspection services, contractor repair services, materials and supplies, equipment rentals and our labor costs.
Impairment of Long-Lived Assets	'
	Impairment of Long-Lived Assets—PP&E used in operations are assessed for impairment whenever changes in facts and circumstances indicate a possible significant deterioration in the future cash flows expected to be generated by an asset group. If, upon review, the sum of the undiscounted pretax cash flows is less than the carrying value of the asset group, then the carrying value is written down to estimated fair value through additional depreciation provisions and reported as impairments in the periods in which the determination of the impairment is made. Individual assets are grouped for impairment purposes at the lowest level for which identifiable cash flows are largely independent of the cash flows of other groups of assets—generally at the pipeline or terminal level. Because there usually is a lack of quoted market prices for our long-lived assets, the fair value of potentially impaired assets is typically determined based on the present values of expected future cash flows using discount rates believed to be consistent with those used by principal market participants or based on a multiple of operating cash flow validated with historical market transactions of similar assets where possible.
	The expected future cash flows used for impairment reviews and related fair value calculations are based on estimated future throughputs, prices, operating costs, tariffs, and capital project decisions, considering all available evidence at the date of review.
Goodwill	'
	Goodwill—Goodwill represents the excess of the purchase price over the estimated fair value of the net assets acquired in the acquisition of a business. Goodwill is not amortized, but rather is tested for impairment annually and when events or changes in circumstances indicate that the fair value of the reporting unit with goodwill has been reduced below carrying value. The fair value of the reporting unit is compared to the book value of the reporting unit. If the fair value is less than book value, including goodwill, then the recorded goodwill is written down to its implied fair value with a charge to earnings. We have determined we have one reporting unit for testing goodwill for impairment.
Asset Retirement Obligations and Environmental Costs	'
	Asset Retirement Obligations and Environmental Costs—Fair values of legal obligations to retire and remove long-lived assets are recorded in the period in which the obligation is incurred. When the liability is initially recorded, we capitalize this cost by increasing the carrying amount of the related PP&E. Over time, the liability is increased for the change in its present value, and the capitalized cost in PP&E is depreciated over the useful life of the related asset or group of assets.
	Environmental expenditures are expensed or capitalized, depending upon their future economic benefit. Expenditures relating to an existing condition caused by past operations, and those having no future economic benefit, are expensed. Liabilities for environmental expenditures are recorded on an undiscounted basis (unless acquired in a purchase business combination) when environmental assessments or cleanups are probable and the costs can be reasonably estimated. Recoveries of environmental remediation costs from other parties, such as state reimbursement funds, are recorded as assets when their receipt is probable and estimable.
Employee Benefit Plans	'
	Employee Benefit Plans—The employees supporting our operations are employees of Phillips 66 and its affiliates. Phillips 66 sponsors various employee pension and postretirement health insurance plans. For purposes of these consolidated financial statements, we are accounting for our participation in these benefit plans as multiemployer plans. We recognize as expense in each period an allocation from Phillips 66 for our share of payroll costs and employee benefit plan costs, and we do not recognize any employee benefit plan assets or liabilities. While we are accounting for our participation as multiemployer plans for the purposes of presenting these consolidated financial statements, those benefit plans are not technically multiemployer plans. Therefore, we have not included the disclosures required for multiemployer plans.
Income Taxes	'
	Income Taxes—We follow the asset and liability method of accounting for income taxes. Under this method, deferred income taxes are recognized for the tax consequences of temporary differences between the financial statement carrying amounts and the tax basis of the assets and liabilities. Our taxable income was included in the consolidated U.S. federal income tax returns of Phillips 66 and in a number of consolidated state income tax returns. Subsequent to the Offering, our operations are treated as a partnership for federal and state income tax purposes, with each partner being separately taxed on its share of the taxable income. Therefore, we have excluded income taxes from these consolidated financial statements, except for the income tax provision resulting from state laws that apply to entities organized as partnerships. With regard to Texas, our tax provision is computed as if we were a stand-alone tax paying entity. Interest related to unrecognized tax benefits is included in interest and debt expense, and penalties are included in operating and maintenance expenses.
Comprehensive Income	'
	Comprehensive Income—We have not reported comprehensive income due to the absence of items of other comprehensive income in the periods presented
Unit-based Compensation	'
	Unit-Based Compensation—The fair value of phantom unit awards granted to non-employee directors is based on the fair market value of Phillips 66 Partners LP common units on the date of grant. Our unit-based compensation expenses are recognized at the time of grant for phantom units since they vest immediately and are not forfeitable.
Net income per unit	'
	Net income per unit applicable to common limited partner units and to subordinated limited partner units is computed by dividing the respective limited partners’ interest in net income for the period subsequent to the Offering 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 when calculating the net income per unit applicable to limited partners. The classes of participating securities include common units, subordinated units, general partner units, and incentive distribution rights. Basic and diluted net income per unit are the same because we do not have any potentially dilutive units outstanding for the period presented.

Properties_Plants_and_Equipmen1

Properties, Plants and Equipment (Tables)	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Summary of Property, Plant and Equipment	'
	Our investment in PP&E, with the associated accumulated depreciation, at December 31 was:
		Estimated Useful Lives	Millions of Dollars
			2013			2012
	Cost:
	Land	N/A	$	4		4
	Buildings and improvements	3 to 30 years	6.1			5.4
	Pipelines and related assets	15 to 45 years	36.2			35.9
	Terminals and related assets	25 to 45 years	165.1			161.2
	Construction-in-progress	N/A	3.1			1.7
	Gross PP&E		214.5			208.2
	Less: accumulated depreciation		(78.6		)	(72.4	)
	Net PP&E		$	135.9		135.8

Assets_Retirement_Obligations_1

Assets Retirement Obligations and Accrued Environmental Costs (Tables)	12 Months Ended
	Dec. 31, 2013
Assets Retirement Obligations and Accrued Environmental Costs [Abstract]	'
Schedule of Asset Retirement Obligations and Accrual for Environmental Costs	'
	Asset retirement obligations and accrued environmental costs at December 31 were:
		Millions of Dollars
		2013		2012
	Asset retirement obligations	$	0.4	0.3
	Accrued environmental costs	—		0.3
	Total asset retirement obligations and accrued environmental costs	0.4		0.6
	Asset retirement obligations and accrued environmental costs due within one year*	—		(0.1	)
	Long-term asset retirement obligations and accrued environmental costs	$	0.4	0.5
	*Classified as a current liability on the balance sheet, under the caption “Other current liabilities.”
Schedule of Change in Asset Retirement Obligation	'
	During 2013 and 2012, our overall asset retirement obligations changed as follows:
		Millions of Dollars
		2013		2012
	Balance at January 1	$	0.3	0.4
	Accretion of discount	—		—
	Changes in estimates of existing obligations	0.1		(0.1	)
	Balance at December 31	$	0.4	0.3

Net_Income_Per_Limited_Partner1

Net Income Per Limited Partner Unit (Tables)	12 Months Ended
	Dec. 31, 2013
Partners' Capital Notes [Abstract]	'
Schedule of Distributions Declared, Partners Interest in Partnership Net Income and Net Income per Unit by Class	'
		Millions of Dollars
		2013
	Net income subsequent to the Offering	$	28.9
	Less: General partner’s distributions declared	0.5
	Limited partners' distributions declared on common units	13.4
	Limited partner's distributions declared on subordinated units	13.4
	Distributions less than net income subsequent to the Offering	$	1.6
		2013
		General Partner		Limited Partners' Common Units		Limited Partner's Subordinated Units	Total
	Net income subsequent to the Offering: (millions)
	Distributions declared	$	0.5	13.4		13.4	27.3
	Distributions less than net income subsequent to the Offering	0.1		0.7		0.8	1.6
	Net income subsequent to the Offering	$	0.6	14.1		14.2	28.9
	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			$	0.4	0.4
	Diluted			0.4		0.4
	On January 22, 2014, the Board of Directors of our general partner declared our quarterly cash distribution of $0.2248 per unit, or $16.2 million in total, for the fourth quarter of 2013. This distribution was paid on February 13, 2014, to unitholders of record as of February 4, 2014.

Leases_Tables

Leases (Tables)	12 Months Ended
	Dec. 31, 2013
Leases [Abstract]	'
Schedule of Esimated Future Minimum Rental Income	'
	As of December 31, 2013, future minimum payments to be received related to these agreements were estimated to be:
		Millions of Dollars
	2014	$	95.5
	2015	95.5
	2016	95.7
	2017	95.5
	2018	76.8
	2019 and thereafter	350.4
	Total	$	809.4

Income_Taxes_Income_Taxes_Tabl

Income Taxes Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Summary of Income Taxes	'
	Income taxes charged to income were:
		Millions of Dollars
		2013		2012	2011
	Current	$	0.4	0.3	0.3
	Deferred	0.1		—	—
	Total	$	0.5	0.3	0.3

Cash_Flow_Information_Tables

Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2013
Supplemental Cash Flow Information [Abstract]	'
Summary of Cash Payments	'
		Millions of Dollars
		2013		2012	2011
	Cash Payments
	Interest and debt expense	$	0.3	—	—
	Income taxes*	—		—	—
	*Excludes our share of cash tax payments made directly by Phillips 66 prior to the Offering on July 26, 2013.

Related_Party_Transactions_Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Summary of Related Party Charges	'
	Significant related-party transactions included in general and administrative expenses and operating and maintenance expenses were:
		Millions of Dollars
		2013		2012	2011
	General and administrative expenses	$	9.9	7.8	5.6
	Operating and maintenance expenses	10		8.8	7.6
	Total	$	19.9	16.6	13.2

Business_and_Basis_of_Presenta1

Business and Basis of Presentation (Narrative) (Details)	12 Months Ended	1 Months Ended
	Dec. 31, 2013	Jul. 27, 2013
	segment	Common Units [Member]
Limited Liability Company or Limited Partnership, Business Organization and Operations [Abstract]	'	'
Initial public offering of common units (including units issued to underwriters), number of units	'	18,888,750
Common units issued pursuant to the exercise of the underwriters' over-allotment option, number of units	'	2,463,750
Number of reportable segments	1	'

Initial_Public_Offering_Narrat

Initial Public Offering (Narrative) (Details) (USD $)	1 Months Ended
In Millions, except Share data, unless otherwise specified	Jul. 27, 2013	Jul. 24, 2013
Initial Public Offering and Summary of Partnership Ownership	'	'
Underwriting discounts and commissions, structuring fees and other offering costs	'	30
Phillips 66 [Member]	'	'
Initial Public Offering and Summary of Partnership Ownership	'	'
Number of general partner units Phillips 66 received in exchange for the Contributed Assets, units	'	1,437,433
Phillips 66's general partner ownership interest, percentage	2.00%	'
Majority Shareholder [Member] | Phillips 66 [Member]	'	'
Initial Public Offering and Summary of Partnership Ownership	'	'
Phillips 66's limited partner ownership interest, percentage	71.70%	'
Common Units [Member]	'	'
Initial Public Offering and Summary of Partnership Ownership	'	'
Initial public offering of common units (including over-allotment option), number of units	18,888,750	'
Initial public offering price per unit	23	'
Common unit over-allotment option fully exercised by the underwriters, number of units	2,463,750	'
Net proceeds from sale of common units to the public	404.4	'
Common Units [Member] | Majority Shareholder [Member] | Phillips 66 [Member]	'	'
Initial Public Offering and Summary of Partnership Ownership	'	'
Number of common units Phillips 66 received in exchange for the Contributed Assets, units	'	16,328,362
Subordinated Units [Member] | Majority Shareholder [Member] | Phillips 66 [Member]	'	'
Initial Public Offering and Summary of Partnership Ownership	'	'
Number of common units Phillips 66 received in exchange for the Contributed Assets, units	'	35,217,112

Major_Customer_and_Concentrati1

Major Customer and Concentration of Credit Risk (Narrative)(Details) (Phillips 66 [Member], Sales Revenue, Services, Net [Member], Customer Concentration Risk [Member])	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
		Predecessor [Member]	Predecessor [Member]
Concentration Risk [Line Items]	'	'	'
Concentration Risk, Percentage	97.00%	97.00%	98.00%

Properties_Plants_and_Equipmen2

Properties, Plants and Equipment (Summary of Properties, Plants and Equipment)(Details) (USD $)

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

In Millions, unless otherwise specified

Land [Member]

Building and Improvements [Member]

Pipelines and Related Assets [Member]

Terminals and storage facilities [Member]

Construction in Progress [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Predecessor [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Land [Member]

Building and Improvements [Member]

Pipelines and Related Assets [Member]

Terminals and storage facilities [Member]

Construction in Progress [Member]

Building and Improvements [Member]

Pipelines and Related Assets [Member]

Terminals and storage facilities [Member]

Building and Improvements [Member]

Pipelines and Related Assets [Member]

Terminals and storage facilities [Member]

Property, Plant and Equipment [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Estimated Useful Lives

'

'

'

'

'

'

'

'

'

'

'

'

'3 years

'15 years

'25 years

'30 years

'45 years

'45 years

Gross PP&E

$214.50

$4

$6.10

$36.20

$165.10

$3.10

$208.20

$4

$5.40

$35.90

$161.20

$1.70

'

'

'

'

'

'

Less: accumulated depreciation

-78.6

'

'

'

'

'

-72.4

'

'

'

'

'

'

'

'

'

'

'

Net PP&E

$135.90

'

'

'

'

'

$135.80

'

'

'

'

'

'

'

'

'

'

'

Goodwill_Narrative_Details

Goodwill (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
		Predecessor [Member]	Predecessor [Member]
Goodwill	'	'	'
Goodwill	$2.50	$2.50	'
Impairment in the carrying value of goodwill	$0	$0	$0

Assets_Retirement_Obligations_2

Assets Retirement Obligations and Accrued Environmental Costs Asset Retirement Obligations and Accrued Environmental Costs (Summary of Asset Retirement Obligations and Accrued Environmental Costs) (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
In Millions, unless otherwise specified			Predecessor [Member]		Predecessor [Member]
Asset Retirement Obligation	$0.40		$0.30		$0.40
Accrued environmental costs	'		0.3		'
Total asset retirement obligations and accrued environmental costs	0		0.6		'
Asset retirement obligations and accrued environmental costs due within one year	'	[1]	-0.1	[1]	'
Long-term asset retirement obligations and accrued environmental costs	$0		$0.50		'
[1]	Classified as a current liability on the balance sheet, under the caption bOther current liabilities.b

Assets_Retirement_Obligations_3

Assets Retirement Obligations and Accrued Environmental Costs Asset Retirement Obligations and Accrued Environmental Costs (Schedule of Change in Asset Retirement Obligation) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
		Predecessor [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]	'	'
Balance at January 1	'	$0.40
Asset Retirement Obligation, Revision of Estimate	0.1	-0.1
Balance at December 31	$0.40	$0.30

Assets_Retirement_Obligations_4

Assets Retirement Obligations and Accrued Environmental Costs (Narrative) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2012
		Predecessor [Member]	TerminalLocations [Member]
			Predecessor [Member]
Current asset retirement obligations	$0	$0	'
Accrued environmental costs	'	$300,000	$100,000

Net_Income_Per_Limited_Partner2

Net Income Per Limited Partner Unit (Schedule of Net Income By Class of Participating Securities) (Details) (USD $)

5 Months Ended

6 Months Ended

12 Months Ended

5 Months Ended

12 Months Ended

5 Months Ended

6 Months Ended

5 Months Ended

6 Months Ended

5 Months Ended

6 Months Ended

1 Months Ended

5 Months Ended

12 Months Ended

5 Months Ended

12 Months Ended

5 Months Ended

In Millions, except Share data, unless otherwise specified

Dec. 31, 2013

Jan. 22, 2014

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Jan. 22, 2014

Dec. 31, 2013

Jan. 22, 2014

Dec. 31, 2013

Jan. 22, 2014

Jan. 22, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Common Units [Member]

Common Units [Member]

Common Units [Member]

General Partner [Member]

General Partner [Member]

Limited Partner [Member]

Limited Partner [Member]

Limited Partner [Member]

Limited Partner [Member]

Subsequent Event [Member]

Non-public [Member]

Non-public [Member]

Non-public [Member]

Non-public [Member]

Non-public [Member]

Non-public [Member]

Non-public [Member]

Common Units [Member]

Common Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Common Units [Member]

Common Units [Member]

Common Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

Subordinated Units [Member]

General Partner [Member]

Majority Shareholder [Member]

Majority Shareholder [Member]

Majority Shareholder [Member]

Majority Shareholder [Member]

Majority Shareholder [Member]

Majority Shareholder [Member]

Partners' Capital [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income

$28.90

'

$60.70

$14.10

'

'

'

'

'

'

'

'

'

$6.50

'

'

$14.20

'

'

$0.60

Distributions declared

11.1

27.3

'

'

'

'

'

0.5

'

13.4

'

13.4

16.2

2.5

'

'

5.5

'

'

0.2

Distributions less than net income subsequent to the Offering

$1.60

'

'

'

'

'

$0.10

'

$0.70

'

$0.80

'

'

'

'

'

'

'

'

'

Weighted average units outstanding, general partner, basic

1,437,433

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average units outstanding, limited partner, basic

'

'

'

35,217,112

'

'

'

'

'

'

'

'

'

16,328,000

'

'

35,217,112

'

'

'

Weighted average units outstanding, basic

71,871,657

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average units outstanding, general partner, diluted

1,437,433

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average units outstanding, limited partner, diluted

'

'

'

35,217,112

'

'

'

'

'

'

'

'

'

16,328,000

'

0

35,217,112

'

0

'

Weighted average units outstanding, diluted

71,871,657

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income per limited partner unit, basic

'

'

'

$0.40

'

'

'

'

'

'

'

'

'

'

'

'

$0.40

'

'

'

Net income per limited partner unit, diluted

'

'

'

$0.40

'

'

'

'

'

'

'

'

'

'

'

'

$0.40

'

$0

'

Net_Income_Per_Limited_Partner3

Net Income Per Limited Partner Unit (Narrative) (Details) (USD $)	5 Months Ended	6 Months Ended	1 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2013	Jan. 22, 2014	Jan. 22, 2014
			Subsequent Event [Member]
Subsequent Event [Line Items]	'	'	'
Cash Distribution Paid Per Unit (dollars)	'	'	$0.22
Total quarterly cash distribution declared	$11.10	$27.30	$16.20

Debt_Narrative_Details

Debt (Narrative) (Details) (Revolving Credit Agreement [Member], USD $)	Dec. 31, 2013	Jul. 24, 2013
Credit Agreement	'	'
Revolving credit agreement borrowing capacity	'	$250,000,000
Amount drawn under credit agreement facility	0	'
Maximum [Member]	'	'
Credit Agreement	'	'
Amount by which the revolving credit agreement borrowing capacity may be increased	'	$250,000,000
Number or renewals available to extend the term of the credit agreement	'	2
Ratio of total debt to EBITDA, maximum ratio	'	5
Ratio of total debt to EBITDA following specified period of certain acquisitions, maximum ratio	'	5.5

Contingencies_Narrative_Detail

Contingencies (Narrative) (Details) (Losses Related To Contributed Assets Subject to a Deductible before Eligibility For Indemnification Under the Omnibus Agreement[Member], USD $)	Jul. 24, 2013
In Millions, unless otherwise specified
Indemnification	'
Amount of aggregate deductible before indemification by Phillips 66 for failure to obtain certain consents, licenses and permits	$0.20
Litigation Matters [Member]	'
Indemnification	'
Aggregate deductible before indemification by Phillips 66	0.2
Environmental Liabilities [Member]	'
Indemnification	'
Aggregate deductible before indemification by Phillips 66	$0.10

Leases_Schedule_of_Future_Mini

Leases (Schedule of Future Minimum Operating Lease Income) (Details) (Majority Shareholder [Member], Phillips 66 [Member], USD $)	Dec. 31, 2013
In Millions, unless otherwise specified
Majority Shareholder [Member] | Phillips 66 [Member]	'
Future Minimum Payments to be Received	'
2014	$95.50
2015	95.5
2016	95.7
2017	95.5
2018	76.8
2019 and thereafter	350.4
Total	$809.40

Employee_Benefit_Plans_Narrati

Employee Benefit Plans (Narrative) (Details) (USD $)	5 Months Ended	7 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Jul. 25, 2013	Dec. 31, 2012	Dec. 31, 2011
		Predecessor [Member]	Predecessor [Member]	Predecessor [Member]
Pension and postretirement costs	$0.10	$0.60	$1.10	$1.10
Defined contribution benefit plan costs	'	$0.30	$0.90	$0.30

UnitBased_Compensation_Narrati

Unit-Based Compensation (Narrative) (Details)	1 Months Ended
	Sep. 30, 2013
	director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of non-employee directors	3
Phillips 66 Partners LP 2013 Incentive Compensation Plan [Member] | Phantom Units [Member] | Non Employee Directors [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of phantom units granted	2,171
Phillips 66 Partners LP 2013 Incentive Compensation Plan [Member] | Common Units [Member] | Maximum [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of common units that may be delivered under the ICP Plan	2,500,000

Income_Taxes_Summary_of_Income

Income Taxes (Summary of Income Taxes) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
		Predecessor [Member]	Predecessor [Member]
Income Taxes	'	'	'
Current	$0.40	$0.30	$0.30
Deferred	0.1	'	'
Total	$0.50	$0.30	$0.30

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	12 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011
			Predecessor [Member]	Predecessor [Member]
Deferred tax liability	$100,000	'	'	'
Effective tax rate, percentage	0.80%	'	0.70%	0.80%
Unrecognized tax benefits	$0	'	'	'

Cash_Flow_Information_Cash_Flo

Cash Flow Information Cash Flow Information (Summary of Cash Flow Information) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013
Interest Paid [Abstract]	'
Interest and debt expense	$0.30	[1]
[1]	Excludes our share of cash tax payments made directly by Phillips 66 prior to the Offering on July 26, 2013.

Related_Parties_Transactions_S

Related Parties Transactions (Summary of Related Party Charges) (Details) (Majority Shareholder [Member], Phillips 66 [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Majority Shareholder [Member] | Phillips 66 [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
General and administrative expenses	$9.90	$7.80	$5.60
Operating and maintenance expenses	10	8.8	7.6
Total	$19.90	$16.60	$13.20

Related_Party_Transactions_Nar

Related Party Transactions (Narrative) (Details) (USD $)	Jul. 24, 2013	Dec. 31, 2013	Jul. 24, 2013	Jul. 24, 2013	Jul. 24, 2013	Dec. 31, 2013	Dec. 31, 2013	Jul. 24, 2013	Jul. 24, 2013
In Millions, unless otherwise specified	pipeline	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]
		Majority Shareholder [Member]	Majority Shareholder [Member]	Majority Shareholder [Member]	Majority Shareholder [Member]	Majority Shareholder [Member]	Majority Shareholder [Member]	Phillips 66 [Member]	Phillips 66 [Member]
			Storage and Stevedoring Services [Member]	Maximum [Member]	Maximum [Member]	Minimum [Member]	Minimum [Member]	Majority Shareholder [Member]	Majority Shareholder [Member]
			agreement	Transportation Services [Member]	Terminal Services [Member]	Commercial Excluding Throughput And Deficiency [Member]	Operational Services Agreement [Member]
				renewal	renewal
Related party agreements and fees	'	'	'	'	'	'	'	'	'
Number of 60-mile Sweeny to Pasadena pipelines	2	'	'	'	'	'	'	'	'
Number of renewal options	'	'	'	2	3	'	'	'	'
Number of minimum consecutive months Phillips 66 decides to suspend refining operations	'	'	'	'	'	'12 months	'	'	'
Number of agreements	'	'	2	'	'	'	'	'	'
Term of agreement	'	'	'	'	'	'	'5 years	'	'
Initial amount of annual operating and administrative support fee	'	$13.70	'	'	'	'	'	'	'
Percent of equity interest right of first offer to acquire Phillips 66's interest	'	'	'	'	'	'	'	33.30%	33.30%

Subsequent_Events_Details

Subsequent Events (Details) (Subsequent Event [Member], Phillips66GoldProductPipelineSystemAndMedfordSpheres [Member], Phillips 66 [Member], Majority Shareholder [Member], USD $)	Feb. 13, 2014
In Millions, except Per Share data, unless otherwise specified	sphere
Subsequent Event [Line Items]	'
Total consideration for acquisition of transportation, terminaling and storage assets	$700
Number of refinery-grade propylene storage spheres acquired	2
Cash to be paid for acquisition	400
Value of units to be issued to finance acquisition	140
Note payable to subsidiary of Phillips 66 to be assumed	$160
Average daily closing price of common units	$38.86
Common Units [Member]	'
Subsequent Event [Line Items]	'
Percentage of common units expected to be issued	98.00%
General Partner Units [Member]	'
Subsequent Event [Line Items]	'
Percentage of common units expected to be issued	2.00%