Magellan Midstream Partners (MMP) 10-K 17 Feb 17 2016 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Feb. 16, 2017	Jun. 30, 2016
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Entity Registrant Name	MAGELLAN MIDSTREAM PARTNERS LP
Entity Central Index Key	1,126,975
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		228,024,556
Entity Public Float			$ 17,271,907,668
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Well-known Seasoned Issuer	Yes

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Transportation and terminals revenue	$ 1,591,119	$ 1,544,746	$ 1,459,267
Product sales revenue	599,602	629,836	878,974
Affiliate management fee revenue	14,689	13,871	22,111
Total revenue	2,205,410	2,188,453	2,360,352
Costs and expenses:
Operating	529,759	525,902	500,901
Cost of product sales	493,338	447,273	594,585
Depreciation and amortization	178,142	166,812	161,741
General and administrative	147,815	151,329	148,288
Total costs and expenses	1,349,054	1,291,316	1,405,515
Earnings of non-controlled entities	78,696	66,483	19,394
Operating profit	935,052	963,620	974,231
Interest expense	194,187	158,895	145,862
Interest income	(1,402)	(1,276)	(1,540)
Interest capitalized	(27,375)	(14,442)	(22,803)
Gain on exchange of interest in non-controlled entity	(28,144)	0	0
Other expense (income)	(8,203)	(1,015)	8,573
Income before provision for income taxes	805,989	821,458	844,139
Provision for income taxes	3,218	2,336	4,620
Net income	$ 802,771	$ 819,122	$ 839,519
Basic net income per limited partner unit (in dollars per unit)	$ 3.52	$ 3.60	$ 3.69
Diluted net income per limited partner unit (in dollars per unit)	$ 3.52	$ 3.59	$ 3.69
Weighted average number of limited partner units outstanding used for basic net income per unit calculation (in units)	227,926	227,550	227,260
Weighted average number of limited partner units outstanding used for diluted net income per unit calculation (in units)	228,057	227,888	227,626

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income		$ 213,291	$ 194,551	$ 187,859	$ 207,070	$ 207,123	$ 250,972	$ 177,391	$ 183,636	$ 802,771	$ 819,122	$ 839,519
Other comprehensive income:
Net loss on cash flow hedges(1)	[1]									(6,699)	(14,904)	(30,090)
Reclassification of net loss (gain) on cash flow hedges to income(1)	[1]									2,049	1,365	(124)
Net actuarial loss(2)	[2]									(2,452)	(8,359)	(33,937)
Plan amendment(2)	[2]									0	3,610	0
Amortization of prior service credit(2)	[2]									(3,516)	(3,713)	(3,680)
Amortization of actuarial loss(2)	[2]									5,525	7,191	3,986
Settlement cost(2)	[2]									202	0	1,809
Total other comprehensive loss										(4,891)	(14,810)	(62,036)
Comprehensive income										$ 797,880	$ 804,312	$ 777,483
[1]	See Note 13–Derivative Financial Instruments for details of the amount of gain/loss recognized in accumulated other comprehensive loss (“AOCL”) on derivatives and the amount of gain/loss reclassified from AOCL into income.
[2]	See Note 10–Employee Benefit Plans for additional detail of the changes in employee benefit plan assets and benefit obligations that are recognized in other comprehensive income (loss).

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 14,701	$ 28,731
Trade accounts receivable	105,689	83,893
Other accounts receivable	25,761	12,701
Inventory	134,378	130,868
Energy commodity derivatives contracts, net	0	39,243
Energy commodity derivatives deposits	49,899	0
Other current assets	39,966	43,418
Total current assets	370,394	338,854
Property, plant and equipment	6,783,737	6,166,766
Less: accumulated depreciation	1,507,996	1,347,537
Net property, plant and equipment	5,275,741	4,819,229
Investments in non-controlled entities	931,255	765,628
Long-term receivables	23,870	20,374
Goodwill	53,260	53,260
Other intangibles (less accumulated amortization of $13,709 and $2,136 at December 31, 2015 and 2016, respectively)	51,976	1,856
Other noncurrent assets	65,577	42,366
Total assets	6,772,073	6,041,567
Current liabilities:
Accounts payable	77,248	104,094
Accrued payroll and benefits	45,690	51,764
Accrued interest payable	65,643	51,296
Accrued taxes other than income	50,166	51,587
Environmental liabilities	10,249	15,679
Deferred revenue	101,891	81,627
Accrued product purchases	51,600	31,339
Energy commodity derivatives contracts, net	30,738	0
Energy commodity derivatives deposits	0	24,252
Current portion of long-term debt, net	0	250,335
Other current liabilities	48,431	51,099
Total current liabilities	481,656	713,072
Long-term debt	4,087,192	3,189,287
Long-term pension and benefits	71,461	77,551
Other noncurrent liabilities	25,868	24,162
Environmental liabilities	13,791	15,759
Commitments and contingencies
Partners' capital:
Limited partner unitholders (227,427 units and 227,784 units outstanding at December 31, 2015 and 2016, respectively)	2,193,346	2,118,086
Accumulated other comprehensive loss	(101,241)	(96,350)
Total partners’ capital	2,092,105	2,021,736
Total liabilities and partners' capital	$ 6,772,073	$ 6,041,567

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Other intangibles, accumulated amortization	$ 2,136	$ 13,709
Limited partner unitholders, units outstanding	227,783,916	227,427,247

Consolidated Statments of Cash

Consolidated Statments of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Activities:
Net income	$ 802,771	$ 819,122	$ 839,519
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	178,142	166,812	161,741
Loss on sale and retirement of assets	11,190	7,871	7,223
Earnings of non-controlled entities	(78,696)	(66,483)	(19,394)
Distributions from investments in non-controlled entities	78,723	66,285	3,086
Equity-based incentive compensation expense	19,358	24,245	27,284
Settlement cost, amortization of prior service credit and actuarial loss	2,211	3,478	2,115
Gain on exchange of interest in non-controlled entity	(28,144)	0	0
Changes in components of operating assets and liabilities (Note 3)	(21,515)	48,362	85,727
Net cash provided by operating activities	964,040	1,069,692	1,107,301
Investing Activities:
Additions to property, plant and equipment	(674,159)	(621,151)	(363,250)
Proceeds from sale and disposition of assets	7,552	3,371	10,780
Acquisition of assets	0	0	(75,000)
Acquisition of business	0	(54,678)	0
Investments in non-controlled entities	(200,023)	(152,466)	(408,001)
Distributions in excess of earnings of non-controlled entities	9,264	14,155	5,487
Net cash used by investing activities	(857,366)	(810,769)	(829,984)
Financing Activities:
Distributions paid	(739,157)	(662,948)	(568,806)
Net commercial paper borrowings (repayments)	(229,975)	(16,981)	296,942
Borrowings under long-term notes	1,142,997	499,589	257,713
Payments on notes	(250,000)	0	(250,000)
Debt placement costs	(10,906)	(6,223)	(2,912)
Net payment on financial derivatives	(19,287)	(42,908)	(3,613)
Settlement of tax withholdings on equity-based incentive compensation	(14,376)	(17,784)	(14,813)
Net cash used by financing activities	(120,704)	(247,255)	(285,489)
Change in cash and cash equivalents	(14,030)	11,668	(8,172)
Cash and cash equivalents at beginning of period	28,731	17,063	25,235
Cash and cash equivalents at end of period	14,701	28,731	17,063
Noncash Investing and Financing Items [Abstract]
Contribution of property, plant and equipment to a non-controlled entity	0	13,252	0
Issuance of limited partner units in settlement of equity-based incentive plan awards	7,289	8,045	7,315
(1) Additions to property, plant and equipment	(653,528)	(623,289)	(366,445)
Changes in accounts payable and other current liabilities related to capital expenditures	(20,631)	2,138	3,195
Additions to property, plant and equipment, net	$ (674,159)	$ (621,151)	$ (363,250)

Consolidated Statement Of Partn

Consolidated Statement Of Partners' Capital - USD ($) $ in Thousands	Total	Limited Partner [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Dec. 31, 2013	$ 1,647,442	$ 1,666,946	$ (19,504)
Comprehensive income:
Net income	839,519	839,519
Total other comprehensive income	(62,036)		(62,036)
Total comprehensive income (loss)	777,483	839,519	(62,036)
Distributions	(568,806)	(568,806)
Equity-based incentive compensation expense	19,963	19,963
Issuance of limited partner units in settlement of equity-based incentive plan awards	7,315	7,315
Settlement of tax withholdings on equity-based incentive compensation	(14,813)	(14,813)
Other	(351)	(351)
Balance at Dec. 31, 2014	1,868,233	1,949,773	(81,540)
Comprehensive income:
Net income	819,122	819,122
Total other comprehensive income	(14,810)		(14,810)
Total comprehensive income (loss)	804,312	819,122	(14,810)
Distributions	(662,948)	(662,948)
Equity-based incentive compensation expense	22,248	22,248
Issuance of limited partner units in settlement of equity-based incentive plan awards	8,045	8,045
Settlement of tax withholdings on equity-based incentive compensation	(17,784)	(17,784)
Other	(370)	(370)
Balance at Dec. 31, 2015	2,021,736	2,118,086	(96,350)
Comprehensive income:
Net income	802,771	802,771
Total other comprehensive income	(4,891)		(4,891)
Total comprehensive income (loss)	797,880	802,771	(4,891)
Distributions	(739,157)	(739,157)
Equity-based incentive compensation expense	19,358	19,358
Issuance of limited partner units in settlement of equity-based incentive plan awards	7,289	7,289
Settlement of tax withholdings on equity-based incentive compensation	(14,376)	(14,376)
Other	(625)	(625)
Balance at Dec. 31, 2016	$ 2,092,105	$ 2,193,346	$ (101,241)

Organization And Description Of

Organization And Description Of Business	12 Months Ended
	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization And Description Of Business	Organization and Description of Business Organization Unless indicated otherwise, the terms “our,” “we,” “us” and similar language refer to Magellan Midstream Partners, L.P. together with its subsidiaries. We are a Delaware limited partnership and our limited partner units trade on the New York Stock Exchange under the ticker symbol “MMP.” Magellan GP, LLC, a wholly owned Delaware limited liability company, serves as our general partner. Description of Business We are principally engaged in the transportation, storage and distribution of refined petroleum products and crude oil. As of December 31, 2016, our asset portfolio, including the assets of our joint ventures, consisted of: • our refined products segment, comprised of our 9,700 -mile refined products pipeline system with 53 terminals as well as 26 independent terminals not connected to our pipeline system and our 1,100 -mile ammonia pipeline system; • our crude oil segment, comprised of approximately 2,200 miles of crude oil pipelines and storage facilities with an aggregate storage capacity of approximately 26 million barrels, of which 16 million are used for contract storage; and • our marine storage segment, consisting of five marine terminals located along coastal waterways with an aggregate storage capacity of approximately 26 million barrels. Description of Products Terminology common in our industry includes the following terms, which describe products that we transport, store and distribute through our pipelines and terminals: • refined products are the output from refineries and are primarily used as fuels by consumers. Refined products include gasoline, diesel fuel, aviation fuel, kerosene and heating oil. Collectively, diesel fuel and heating oil are referred to as distillates; • liquefied petroleum gases, or LPGs, are produced as by-products of the crude oil refining process and in connection with natural gas production. LPGs include butane and propane; • blendstocks are blended with refined products to change or enhance their characteristics such as increasing a gasoline’s octane or oxygen content. Blendstocks include alkylates, oxygenates and natural gasoline; • heavy oils and feedstocks are used as burner fuels or feedstocks for further processing by refineries and petrochemical facilities. Heavy oils and feedstocks include No. 6 fuel oil and vacuum gas oil; • crude oil and condensate are used as feedstocks by refineries and petrochemical facilities; • biofuels , such as ethanol and biodiesel, are typically blended with other refined products as required by government mandates; and • ammonia is primarily used as a nitrogen fertilizer. Except for ammonia, we use the term petroleum products to describe any, or a combination, of the above-noted products.

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation. Our consolidated financial statements include our refined products, crude oil and marine storage operating segments. We consolidate all entities in which we have a controlling ownership interest. We apply the equity method of accounting to investments in entities over which we exercise significant influence but do not control. We eliminate all intercompany transactions. Use of Estimates. The preparation of our consolidated financial statements in conformity with generally accepted accounting principles in the U.S. (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities that exist at the date of our consolidated financial statements, as well as their impact on the reported amounts of revenue and expense during the reporting periods. Actual results could differ from those estimates. Cash Equivalents. Cash and cash equivalents include demand and time deposits and funds that own highly marketable securities with original maturities of three months or less when acquired. We periodically assess the financial condition of the institutions where we hold these funds, and, at December 31, 2015 and 2016 , we believed our credit risk relative to these funds was minimal. Accounts Receivable and Allowance for Doubtful Accounts. Accounts receivable represent valid claims against customers. We recognize accounts receivable when we sell products or render services and collection of the receivable is probable. We extend credit terms to certain customers based on historical dealings and to other customers after a review of various credit indicators. We establish an allowance for doubtful accounts for all or any portion of an account where we consider collections to be at risk and evaluate reserves no less than quarterly to determine their adequacy. Judgments relative to at-risk accounts include the customers’ current financial condition, the customers’ historical relationship with us and current and projected economic conditions. We write off accounts receivable when we deem an account uncollectible. Inventory. Inventory is comprised primarily of refined products, liquefied petroleum gases, transmix, crude oil and additives, which are stated and relieved at the lower of average cost or market. Property, Plant and Equipment. Property, plant and equipment consist primarily of pipeline, pipeline-related equipment, storage tanks and processing equipment. We state property, plant and equipment at cost except for certain acquired assets recorded at fair value on their respective acquisition dates and impaired assets. We record impaired assets at fair value on the last impairment evaluation date for which an adjustment was required. We assign asset lives based on reasonable estimates when we place an asset into service. Subsequent events could cause us to change our estimates, which would affect the future calculation of depreciation expense. The range of depreciable lives by asset category is detailed in Note 8— Property, Plant and Equipment and Other Intangibles . When we sell or retire property, plant and equipment, we remove its carrying value and the related accumulated depreciation from our accounts and record any associated gains or losses on our consolidated statements of income in the period of sale or disposition. We capitalize expenditures to replace existing assets and retire the replaced assets. We capitalize expenditures when they extend the useful life, increase the productivity or capacity or improve the safety or efficiency of the asset. We capitalize direct project costs such as labor and materials as incurred. Indirect project costs, such as overhead, are capitalized based on a percentage of direct labor charged to the respective capital project. We charge expenditures for maintenance, repairs and minor replacements to operating expense in the period incurred. Investments in Non-Controlled Entities. We account for investments greater than 20% in affiliates that we do not control using the equity method of accounting. Under this method, an investment is recorded at our acquisition cost or capital contributions, as adjusted by contractual terms, plus equity in earnings or losses since acquisition or formation, plus interest capitalized, less distributions received and amortization of interest capitalized and excess net investment. Excess net investment is the amount by which our investment in a non-controlled entity exceeded our proportionate share of the book value of the net assets of that investment. We amortize excess net investment over the weighted-average depreciable asset lives of the equity investee. Our unamortized excess net investment was $76.7 million and $61.3 million at December 31, 2015 and 2016 , respectively. The amount of unamortized excess investment is primarily related to our investment in BridgeTex. We evaluate equity method investments for impairment whenever events or circumstances indicate that there is an other-than-temporary loss in value of the investment. In the event that we determine that the loss in value of an investment is other-than-temporary, we would record a charge to earnings to adjust the carrying value to fair value. We recognized no equity investment impairments during 2014 , 2015 and 2016 . Goodwill and Other Intangible Assets. Goodwill resulting from a business combination is not subject to amortization. We test goodwill at the reporting unit level for impairment on an annual basis and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of the reporting unit below its carrying amount. We amortize other intangible assets with finite lives over their estimated useful lives of 6 years up to 30 years. The weighted-average asset life of our other intangible assets at December 31, 2016 was approximately 21 years. We adjust the useful lives of our other intangible assets if events or circumstances indicate there has been a change in the remaining useful lives. We eliminate from our balance sheets the gross carrying amount and the related accumulated amortization for any fully amortized intangibles in the year they are fully amortized. We review our other intangible assets for impairment whenever events or changes in circumstances indicate we should assess the recoverability of the carrying amount of the intangible asset. We recognized no impairments for other intangible assets in 2014 , 2015 and 2016 . Impairment of Long-Lived Assets. We evaluate our long-lived assets of identifiable business activities, other than those held for sale, for impairment when events or changes in circumstances indicate, in management’s judgment, that the carrying value of such assets may not be recoverable. We base the determination of whether impairment has occurred on management’s estimate of undiscounted future cash flows attributable to the assets as compared to the carrying value of the assets. We calculate the amount of the impairment recognized as the excess of the carrying amount of the asset over the fair value of the assets, as determined either through reference to similar asset sales or by estimating the fair value using a discounted cash flow approach. Judgments and assumptions are inherent in management’s estimate of undiscounted future cash flows used to determine recoverability of an asset and the estimate of an asset’s fair value used to calculate the amount of impairment to recognize. The use of alternate judgments and assumptions could result in the recognition of different levels of impairment charges in the financial statements. In January 2017, the sole customer of our Corpus Christi condensate splitter, an affiliate of Trafigura, AG, terminated its agreement with us, and we are pursuing legal remedies based on our belief that the termination was a breach of its obligations. These events triggered an impairment analysis of the Corpus Christi splitter asset group within our crude oil segment. Our assessment included multiple scenarios of undiscounted future cash flows that considered variables including pricing assumptions, fixed and variable costs, expected yields and throughput capacity of the condensate splitter. This assessment resulted in the undiscounted cash flows significantly exceeding the approximately $300 million carrying value of the asset group, and no impairment was recorded. The use of different judgments and assumptions associated with the measurement variables noted, particularly the pricing assumptions, fixed and variable costs and expected yields, could result in lower projections of future cash flows, which could result in an impairment loss. Interest Capitalized. During construction, we capitalize interest on all construction projects requiring a completion period of three months or longer and total project costs exceeding $0.5 million . The interest we capitalize is based on the weighted-average interest rate of our debt. The weighted average rates used to capitalize interest on borrowed funds was 4.9% , 4.7% and 4.9% for the years ended December 31, 2014 , 2015 and 2016 , respectively. Pension and Postretirement Medical and Life Benefit Obligations. We sponsor three pension plans that collectively cover substantially all of our employees, a postretirement medical and life benefit plan for certain employees and a defined contribution plan. Our pension and postretirement benefit liabilities represent the funded status of the present value of benefit obligations of these plans. We develop pension, postretirement medical and life benefits costs from actuarial valuations. We establish actuarial assumptions to anticipate future events and use those assumptions when calculating the expense and liabilities related to these plans. These factors include assumptions management makes concerning expected investment return on plan assets, discount rates, health care costs trend rates, turnover rates and rates of future compensation increases, among others. In addition, we use subjective factors such as withdrawal and mortality rates to develop actuarial valuations. Management reviews and updates these assumptions on an annual basis. The actuarial assumptions that we use may differ from actual results due to changing market rates or other factors. These differences could affect the amount of pension and postretirement medical and life benefit expense we will recognize in future periods. Derivative Financial Instruments. We use derivative instruments to manage market price risks associated with inventories, interest rates, tank bottoms and certain forecasted transactions. Our policies prohibit us from engaging in speculative trading activities. For certain physical forward commodity derivative contracts, accounting guidance provides for and we apply the normal purchase / normal sale exception, whereby changes in the mark-to-market values of such contracts are not recognized in income, rather the revenues and expenses associated with such transactions are recognized during the period when commodities are physically delivered or received. Physical forward commodity contracts subject to this exception are evaluated for the probability of future delivery and are periodically back-tested once the forecasted period has passed to determine whether similar forward contracts are probable of physical delivery in the future. For all other derivative contracts, we record the agreements on our balance sheets at fair value. For those instruments that qualify for hedge accounting, the accounting treatment depends on their intended use and their designation. We divide derivative financial instruments qualifying for hedge accounting treatment into two categories: (1) cash flow hedges and (2) fair value hedges. We execute cash flow hedges to hedge against the variability in cash flows related to a forecasted transaction and execute fair value hedges to hedge against the changes in the value of a recognized asset or liability. At the inception of a hedged transaction, we document the relationship between the hedging instrument and the hedged item, the risk management objectives and the methods used for assessing and testing hedge effectiveness. We also assess, both at the inception of the hedge and on an on-going basis, whether the derivatives that are used in our hedging transactions are highly effective in offsetting changes in cash flows or fair value of the hedged item. If we determine that a derivative originally designated as a cash flow or fair value hedge is no longer highly effective, we discontinue hedge accounting prospectively and record the change in the fair value of the derivative in current earnings. The changes in fair value of derivative financial instruments that are not designated as hedges or that do not qualify for the normal purchase / normal sales exception are included in current earnings. As part of our risk management process, we assess the creditworthiness of the financial and other institutions with which we execute financial derivatives. Such financial instruments involve the risk of non-performance by the counterparty, which could result in material losses to us. We enter into commodity-based futures contracts traded on the New York Mercantile Exchange to hedge against price changes on a portion of the petroleum products we expect to sell or purchase in the future, as well as against changes in the fair value of certain tank bottoms. We record the effective portion of the gains or losses for those contracts that are designated as cash flow hedges in other comprehensive income and the ineffective portion in product sales revenue. We reclassify gains and losses from contracts designated as cash flow hedges from other comprehensive income to product sales revenue when the hedged transaction occurs and we terminate the derivative agreement. We record the effective portion of the gains or losses for those contracts designated as fair value hedges as adjustments to the assets being hedged and the ineffective portions as well as amounts excluded from the assessment of hedge effectiveness as adjustments to other income or expense. We recognize the change in fair value of hedges that are not designated as hedges in product sales revenue or cost of product sales, except for those contracts that hedge the inventories associated with our pipeline system overages, which are recorded in operating expenses. We use interest rate derivatives to help manage interest rate risk. We record any ineffectiveness on derivatives designated as hedging instruments to interest expense and the change in fair value of interest rate derivatives that we do not designate as hedging instruments to other income or expense in our results of operations. For the effective portion of interest rate cash flow hedges, we record the noncurrent portion of unrealized gains or losses as an adjustment to other comprehensive income with the current portion recorded as an adjustment to interest expense. For the effective portion of fair value hedges on long-term debt, we record the noncurrent portion of gains or losses as an adjustment to long-term debt with the current portion recorded as an adjustment to interest expense. Revenue Recognition. Sales revenue is recognized based on contracts or other persuasive evidence of an arrangement with the customer that includes fixed or determinable prices in which collectability is reasonably assured. Product sales revenue is recognized for products upon delivery and when the customer assumes the risks and rewards of ownership. We recognize pipeline transportation revenue for crude oil shipments when our customers take possession of their product from our system. For shipments of refined products and ammonia under published tariffs that combine transportation and terminalling services, we recognize revenue when our customers take possession of their product from our system. For shipments where terminalling services are not included in the tariff, we recognize revenue when our customers’ product arrives at the customer-designated destination. We have certain agreements that require counterparties to ship a minimum volume over an agreed-upon period. Revenue pursuant to such agreements is recognized at the earlier of when the volume is shipped or when the counterparty’s ability to meet the minimum volume commitment has expired. The tariffs we charge for our pipeline transportation systems are primarily regulated by the Federal Energy Regulatory Commission (“FERC”); however, certain tariffs are regulated by the Surface Transportation Board or state regulatory authorities. Our tariffs include provisions which allow us to deduct from our customer’s inventory a small percentage of the products our customers transport on our pipeline systems. We refer to these product quantities as tender deductions. We receive tender deductions from our customers as consideration for product losses during the transportation of their refined products or crude oil within our pipeline systems. Our customers are guaranteed delivery of the amount of their injected volumes, net of tender deductions, irrespective of what our actual product losses may be during the delivery process. Tender deduction revenue is recognized when the transportation barrels are received and is recorded at the fair value of the product received. We recognize injection service fees associated with additives upon injection to the customer’s product, which occurs at the time we deliver the product to our customers. We recognize tank storage, pipeline capacity leases, terminalling, throughput, ethanol loading and unloading services, laboratory testing, data services, pipeline operation fees and other miscellaneous service-related revenue upon completion of the rendered services. We recognize product sales upon delivery of the product to the customer. We record back-to-back purchases and sales of refined products where we are acting as an agent to facilitate refined product sales between a supplier and a customer on a net basis. Deferred Transportation Revenue and Costs. Generally, we invoice customers on our refined products pipeline for transportation services when their product enters our system. At each period end, we record all invoiced amounts associated with products that have not yet been delivered (in-transit products) as a deferred liability. The value of this liability is calculated as the total of the volume of each product type, for each pipeline region, multiplied by the average tariff rate for that product type for the most recent month invoiced to our customers. We use the most recent month’s average tariff rate because the product in our pipeline system generally turns over every month. Additionally, at each period end, we defer the direct costs we have incurred associated with these in-transit products, until delivery occurs, as a deferred asset. These direct costs are estimated based on our average per-barrel direct delivery cost for the current year multiplied by the total in-transit barrels in our system at the end of the period multiplied by 50% to reflect the average transportation costs incurred for all products across all our pipeline systems. We use 50% of the in-transit barrels because that best represents the average delivery point of all barrels in our pipeline system. These deferred revenues and costs are determined using judgments and assumptions that management considers reasonable. Pipeline Over/Short Product. Each period end we measure the volume of each type of product in our pipeline system, which is compare d to the volumes of our customers’ inventories (as adjusted for tender deductions). To the extent that the product volumes in our pipeline system exceed the volumes of our customers’ book inventories, we increase our product inventories and recognize a gain; however, to the extent the product in our pipeline system is less than our customers’ book inventories, we record a liability (for product owed to our customers) and recognize a loss. The product gains and losses we recognize are recorded based on period-end product market prices, and we include those gains or losses in operating expenses on our consolidated statements of income. Excise Taxes Charged to Customers . Revenues are recorded net of all amounts charged to our customers for excise taxes. Equity-Based Incentive Compensation. The compensation committee of our general partner’s board of directors (the “compensation committee”) has approved incentive awards of phantom units representing limited partner interests in us to certain employees and to independent members of our general partner’s board of directors. The phantom unit awards granted include: (i) performance-based awards which are issued to certain officers, managers and other key employees (“performance-based awards”), (ii) time-based awards which are issued to certain officers, managers and key employees (“time-based awards”), and (iii) performance awards which are issued to independent members of our general partner’s board of directors (“director awards”). All of the performance-based and time-based awards, as well as director awards that have been deferred into the Director Deferred Compensation Plan, include distribution equivalent rights. We classify our performance-based and time-based unit awards as equity, and we classify the director awards as liability awards. Fair value for awards classified as equity is determined on the grant date of the award, and we recognize this value as compensation expense ratably over the requisite service period, which is the vesting period of each unit award. Because all of our outstanding unit awards contain distribution equivalent rights, the per-unit fair value of our equity awards is the closing price of our limited partner units on the grant date. However, the per-unit fair value of our performance-based unit awards also includes the fair value of the market-based component of those awards. Compensation expense for our equity awards is calculated as the number of unit awards less forfeitures, multiplied by the per unit grant date fair value of those awards, multiplied by the percentage of the requisite service period completed at each period end, multiplied by the expected payout percentage, less previously-recognized compensation expense. Compensation expense for our liability awards is calculated as the number of phantom units awarded, multiplied by the per unit fair value of those awards on the last day of the reporting period, less previously-recognized compensation expense. Our outstanding performance-based awards include provisions that can result in payouts to the recipients of these awards of 0% to 200% of the targeted amount of the award. Additionally, these performance-based awards are subject to a total unitholder return market performance adjustment, which could increase or decrease the payout of these awards by as much as 50% . The market performance adjustment component is based on our total unitholder return compared to the total unitholder returns of specified peer companies. Judgments and assumptions of the final award payouts are inherent in the accruals recorded for equity-based incentive compensation costs. The use of alternate judgments and assumptions could result in the recognition of different levels of equity-based incentive compensation costs. Payouts related to time-based awards are based solely on the completion of the requisite service period by the employee. Time-based awards contain no provisions which would provide for a payout to the employee of anything other than the original number of units awarded and the associated distribution equivalents. The vesting period for both the performance-based and time-based awards is generally three years; however, certain awards have been issued with shorter vesting periods while others have vesting periods of up to four years. We settle performance-based and time-based awards that have vested by issuing new limited partner units, except for the associated statutory tax withholding, which we settle by paying in cash. Director awards may be deferred and may be settled in cash or by issuing limited partner units. Director awards deferred prior to 2015 are paid in January of the year following the director’s resignation from the board of directors of our general partner or death. Director awards deferred after January 1, 2015 are paid 60 days following the director’s death or resignation from the board of directors of our general partner. Contingencies and Environmental. Certain conditions may exist as of the date our consolidated financial statements are issued that could result in a loss to us, but which will only be resolved when one or more future events occur or fail to occur. Our management assesses such contingent liabilities, which inherently involves significant judgment. In assessing loss contingencies related to legal proceedings that are pending against us or for unasserted claims that may result in proceedings, our management, with input from legal counsel, evaluates the perceived merits of any legal proceedings or unasserted claims as well as the perceived merits of the amount of relief sought or expected to be sought therein. Environmental expenditures are charged to operating expense or capitalized based on the nature of the expenditures. Environmental expenditures that meet the capitalization criteria for property, plant and equipment, as well as costs that mitigate or prevent environmental contamination that has yet to occur, are capitalized. We expense expenditures that relate to an existing condition caused by past operations. We initially record environmental liabilities assumed in a business combination at fair value; otherwise, we record environmental liabilities on an undiscounted basis. We recognize liabilities for other commitments and contingencies when, after analyzing the available information, we determine it is probable that an asset has been impaired, or that a liability has been incurred and the amount of impairment or loss can be reasonably estimated. When we can estimate a range of probable loss, we accrue the most likely amount within that range, or if no amount is more likely than another, we accrue the minimum of the range of probable loss. We expense legal costs associated with loss contingencies as incurred. We record environmental liabilities independently of any potential claim for recovery. Accruals related to environmental matters are generally determined based on site-specific plans for remediation, taking into account currently available facts, existing technologies and presently enacted laws and regulations. Accruals for environmental matters reflect our prior remediation experience and include an estimate for costs such as fees paid to contractors, outside engineering and consulting firms. Accruals for estimated losses from environmental remediation obligations generally are recognized no later than completion of the remediation feasibility study. Such accruals are adjusted as further information develops or circumstances change. We maintain specific insurance coverage, which may cover all or portions of certain environmental expenditures less a deductible. We recognize receivables in cases where we consider the realization of reimbursements of remediation costs as probable. We would sustain losses to the extent of amounts we have recognized as environmental receivables if the counterparties to those transactions were unable to perform their obligations to us. The determination of the accrual amounts recorded for environmental liabilities includes significant judgments and assumptions made by management. The use of alternate judgments and assumptions could result in the recognition of different levels of environmental remediation costs. Income Taxes. We are a partnership for income tax purposes and, therefore, have not been subject to federal or state income taxes for most of the states in which we operate. The tax on our net income is borne by the individual partners through the allocation of taxable income. Net income for financial statement purposes may differ significantly from taxable income of unitholders because of differences between the tax basis and financial reporting basis of assets and liabilities and the taxable income allocation requirements under our partnership agreement. The aggregate difference in the basis of our net assets for financial and tax reporting purposes cannot be readily determined because information regarding each partner’s tax attributes is not available to us. As a publicly traded limited partnership, we are subject to a statutory requirement that our “qualifying income” (as defined by the Internal Revenue Code, related Treasury Regulations and Internal Revenue Service pronouncements) exceed 90% of our total gross income, determined on a calendar year basis. If our qualifying income does not meet this statutory requirement, we could be taxed as a corporation for federal and state income tax purposes. For the years ended December 31, 2014 , 2015 and 2016 , our qualifying income met the statutory requirement. The amounts recognized as provision for income taxes in our consolidated statements of income are primarily comprised of partnership-level taxes levied by the state of Texas. This tax is based on revenues less direct costs of sale for our assets apportioned to the state of Texas. Net Income Per Unit. We calculate basic net income per limited partner unit for each period by dividing net income by the weighted-average number of limited partner units outstanding. The difference between our actual limited partner units outstanding and our weighted-average number of limited partner units outstanding used to calculate net income per limited partner unit is due to the impact of: (i) the phantom units issued to independent directors which is included in the calculation of basic and diluted weighted average units outstanding, and (ii) the weighted average effect of units actually issued during a period. The difference between the weighted-average number of limited partner units outstanding used for basic and diluted net income per unit calculations on our consolidated statements of income is primarily the dilutive effect of phantom unit grants associated with our long-term incentive plan which have not yet vested in periods where contingent performance metrics have been met. New Accounting Pronouncements In March 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting , which is part of the FASB’s initiative to simplify accounting standards. The guidance requires an entity to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur, and allows equity classification for awards where employees elect to withhold up to the maximum statutory tax rates in the applicable jurisdictions. The new standard also requires cash paid by employers when directly withholding shares for tax withholding purposes to be classified as a financing activity in the statement of cash flows. We elected to early adopt ASU 2016-09 during the first quarter of 2016, and this adoption did not have a material impact on our consolidated financial statements. In conjunction with our adoption of this new accounting standard, we elected to account for equity-based compensation forfeitures as they occur. Additionally, and consistent with our prior accounting policy, we continue to show cash paid when directly withholding shares for tax withholding purposes as a financing activity in our statements of cash flows. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). This ASU requires lessees to recognize a right of use asset and lease liability on the balance sheet for all leases, with the exception of short-term leases. The new accounting model for lessors remains largely the same, although some changes have been made to align it with the new lessee model and the new revenue recognition guidance. This update also requires companies to include additional disclosures regarding their lessee and lessor agreements. Public companies are required to adopt the standard for financial reporting periods that start after December 15, 2018, although early adoption is permitted. We are currently in the process of evaluating the impact this new standar

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - Supplemental Disclosures	12 Months Ended
	Dec. 31, 2016
Supplemental Cash Flow Information [Abstract]
Consolidated Statements of Cash Flows - Supplemental Disclosures	Consolidated Statements of Cash Flows Changes in the components of operating assets and liabilities are as follows (in thousands): Year Ended December 31, 2014 2015 2016 Trade accounts receivable and other accounts receivable $ 49,215 $ 3,664 $ (31,107 ) Inventory 29,462 26,894 (3,510 ) Energy commodity derivatives contracts, net of derivatives deposits (7,583 ) (606 ) (692 ) Accounts payable (10,918 ) 4,107 (4,423 ) Accrued payroll and benefits 6,055 3,466 (6,074 ) Accrued interest payable 1,038 5,323 14,347 Accrued taxes other than income 9,094 3,699 (1,421 ) Deferred revenue 7,978 10,485 20,264 Accrued product purchases (18,678 ) (13,016 ) 20,261 Current and noncurrent environmental liabilities (2,144 ) (4,904 ) (7,398 ) Other current and noncurrent assets and liabilities 22,208 9,250 (21,762 ) Total $ 85,727 $ 48,362 $ (21,515 ) Other current and noncurrent assets and liabilities above exclude certain non-cash items that were reflected in the consolidated balance sheets but were not reflected in the statement of cash flows. At December 31, 2014 , 2015 and 2016 , the long-term pension and benefits liability was increased by $33.9 million , $4.7 million and $2.5 million , respectively, resulting in a corresponding increase in accumulated other comprehensive loss (“AOCL”).

Investments in Non-Controlled E

Investments in Non-Controlled Entities	12 Months Ended
	Dec. 31, 2016
Equity Method Investments and Joint Ventures [Abstract]
Investments in Non-Controlled Entities	Investments in Non-Controlled Entities Our investments in non-controlled entities at December 31, 2016 were comprised of: Entity Ownership Interest BridgeTex Pipeline Company, LLC (“BridgeTex”) 50% Double Eagle Pipeline LLC (“Double Eagle”) 50% HoustonLink Pipeline Company, LLC (“HoustonLink”) 50% Powder Springs Logistics, LLC (“Powder Springs”) 50% Saddlehorn Pipeline Company, LLC (“Saddlehorn”) 40% Seabrook Logistics, LLC (“Seabrook”) 50% Texas Frontera, LLC (“Texas Frontera”) 50% In February 2016, we transferred our 50% membership interest in Osage Pipe Line Company, LLC (“Osage”) to an affiliate of HollyFrontier Corporation. In conjunction with this transaction, we entered into several commercial agreements with affiliates of HollyFrontier Corporation. We recorded these commercial agreements as $43.7 million of intangible assets and $8.3 million of other receivables in our consolidated balance sheets. The intangible assets will be amortized over the 20 -year life of the contracts received. The total gain recorded in 2016 was $28.1 million . The management fees we have recognized from BridgeTex, Osage, Powder Springs, Saddlehorn and Texas Frontera are reported as affiliate management fee revenue on our consolidated statements of income. In addition, we receive reimbursement from certain of our joint ventures for costs incurred during construction and operations, which we have included as reductions to costs and expenses on our consolidated statements of income. These cost reimbursements totaled $1.3 million and $4.2 million for the year ended December 31, 2015 and 2016 , respectively. For the year ended December 31, 2015 and 2016 , we recognized pipeline capacity lease revenue from BridgeTex of $34.6 million and $35.5 million , respectively, which we included in transportation and terminals revenue on our consolidated statements of income. We recognized throughput revenue from Double Eagle for the year ended December 31, 2015 and 2016 of $3.4 million and $3.3 million , respectively, which we included in transportation and terminals revenue on our consolidated statements of income. At December 31, 2015 and 2016 , we recognized $0.2 million and $0.3 million , respectively, of trade accounts receivable from Double Eagle. We recognized storage revenue of $0.7 million from Saddlehorn for the year ended December 31, 2016 , which we included in transportation and terminals revenue on our consolidated statements of income. At December 31, 2016 , we recognized a $0.1 million other accounts receivable from Saddlehorn related to miscellaneous cost reimbursements. The financial results from Texas Frontera are included in our marine storage segment, the financial results from BridgeTex, Double Eagle, HoustonLink, Osage, Saddlehorn and Seabrook are included in our crude oil segment and the financial results from Powder Springs are included in our refined products segment, each as earnings/losses of non-controlled entities. A summary of our investments in non-controlled entities (representing only our proportionate interests) follows (in thousands): Investments at December 31, 2015 $ 765,628 Additional investment 200,023 Exchange of investment in non-controlled entity (25,105 ) Earnings of non-controlled entities: Proportionate share of earnings 80,974 Amortization of excess investment and capitalized interest (2,278 ) Earnings of non-controlled entities 78,696 Less: Distributions of earnings from investments in non-controlled entities 78,723 Distributions in excess of earnings of non-controlled entities 9,264 Investments at December 31, 2016 $ 931,255 Summarized financial information of our non-controlled entities (representing 100% of the interests in these entities) follows (in thousands): December 31, 2015 2016 Current assets $ 158,128 $ 208,901 Noncurrent assets 1,383,394 1,714,920 Total assets $ 1,541,522 $ 1,923,821 Current liabilities $ 149,231 $ 111,164 Noncurrent liabilities 7,719 27,022 Total liabilities $ 156,950 $ 138,186 Equity $ 1,384,572 $ 1,785,635 Year Ended December 31, 2014 2015 2016 Revenue $ 84,056 $ 246,841 $ 279,180 Net income $ 41,279 $ 138,457 $ 164,684

Business Combinations

Business Combinations	12 Months Ended
	Dec. 31, 2016
Business Combinations [Abstract]
Business Combinations	Business Combinations 2015 Business Combination. On May 1, 2015, we acquired a refined products terminal in Atlanta, Georgia for net cash consideration of $54.7 million . As this acquired business is not significant to our consolidated operating results and financial position, pro forma financial information and the purchase price allocation of acquired assets and liabilities have not been presented. The results of the acquired operations subsequent to the acquisition date have been included in the accompanying consolidated financial statements and in the tables below in our refined products operating segment.

Inventory

Inventory	12 Months Ended
	Dec. 31, 2016
Inventory Disclosure [Abstract]
Inventory	Inventory Inventory at December 31, 2015 and 2016 was as follows (in thousands): December 31, 2015 2016 Refined products $ 57,455 $ 54,285 Liquefied petroleum gases 17,954 24,868 Transmix 21,297 28,319 Crude oil 28,385 20,839 Additives 5,777 6,067 Total inventory $ 130,868 $ 134,378

Product Sales Revenue

Product Sales Revenue	12 Months Ended
	Dec. 31, 2016
Product Sales Revenue [Abstract]
Product Sales Revenue	Product Sales Revenue The amounts reported as product sales revenue on our consolidated statements of income include revenue from the physical sale of petroleum products and mark-to-market adjustments from exchange-based futures contracts. See Note 13 – Derivative Financial Instruments for a discussion of our commodity hedging strategies and how our futures contracts impact product sales revenue. All of the petroleum products inventory we physically sell associated with our butane blending and fractionation activities, as well as the barrels from product gains we obtain from our operations, including tender deductions, are reported as product sales revenue on our consolidated statements of income. For the years ended December 31, 2014 , 2015 and 2016 , product sales revenue included the following (in thousands): Year Ended December 31, 2014 2015 2016 Physical sale of petroleum products $ 733,654 $ 561,410 $ 638,186 Change in value of futures contracts 145,320 68,426 (38,584 ) Total product sales revenue $ 878,974 $ 629,836 $ 599,602

Property, Plant and Equipment a

Property, Plant and Equipment and Other Intangibles	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment and Other Intangibles	Property, Plant and Equipment and Other Intangibles Property, plant and equipment consisted of the following (in thousands): Estimated Depreciable Lives December 31, 2015 2016 Construction work-in-progress $ 476,662 $ 500,208 Land and rights-of-way 275,277 339,561 Buildings 88,641 101,065 10 to 56 years Storage tanks 1,684,430 1,829,223 10 to 40 years Pipeline and station equipment 2,249,067 2,457,429 10 to 69 years Processing equipment 1,217,492 1,350,032 3 to 56 years Other 175,197 206,219 3 to 48 years Property, Plant and Equipment, Gross $ 6,166,766 $ 6,783,737 Other includes total interest capitalized on construction in progress as of December 31, 2015 and 2016 of $31.4 million and $43.1 million , respectively. Depreciation expense for the years ended December 31, 2014 , 2015 and 2016 was $159.0 million , $164.1 million and $176.7 million , respectively. We amortize other intangible assets with finite lives over their estimated useful lives of 6 years up to 30 years. The weighted average asset life of our other intangible assets at December 31, 2016 was approximately 21 years. We adjust the useful lives of our other intangible assets if events or circumstances indicate there has been a change in the remaining useful lives. We eliminate from our balance sheets the gross carrying amount and the related accumulated amortization for any fully amortized intangibles in the year they are fully amortized. During the years ended December 31, 2014, 2015 and 2016 amortization of other intangible assets was $2.7 million , $2.7 million and $1.4 million , respectively. No material impairments of intangible assets were recorded during these same annual periods.

Major Customers and Concentrati

Major Customers and Concentration Of Risks	12 Months Ended
	Dec. 31, 2016
Major Customers and Concentration Of Risks [Abstract]
Major Customers and Concentration Of Risks	Major Customers and Concentration of Risks Major Customers. One customer accounted for 12% of our consolidated total revenue in 2014. The majority of these revenues resulted from the sale of refined products that were generated in connection with our butane blending and fractionation activities, which are activities conducted by our refined products segment. No other customer accounted for more than 10% of our consolidated revenues during 2014, 2015 and 2016. Concentration of Risks. We transport, store and distribute refined products for refiners, marketers, traders and end users of those products. We derive the major concentration of our revenue and trade receivables from activities conducted in the central U.S. Concentrations of customers may affect our overall credit risk as our customers may be similarly affected by changes in economic, regulatory or other factors. We generally secure transportation and storage revenue with warehouseman’s liens. We periodically evaluate the financial condition and creditworthiness of our customers and require additional security as we deem necessary. As of December 31, 2016 , we had 1,747 employees, 930 of which were assigned to our refined products segment and concentrated in the central U.S. Approximately 24% of the 930 employees are represented by the United Steel Workers (“USW”) and covered by a collective bargaining agreement that expires in January 2019. At December 31, 2016 , 141 of our employees were assigned to our crude oil segment and were concentrated in the central U.S., and none of these employees were covered by a collective bargaining agreement. The labor force of 171 employees assigned to our marine storage segment at December 31, 2016 was primarily located in the Gulf and East Coast regions of the U.S. Approximately 17% of these employees are represented by the International Union of Operating Engineers (“IUOE”) and covered by a collective bargaining agreement that expires in October 2020.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans We sponsor a defined contribution plan in which we match our employees’ qualifying contributions, resulting in additional expense to us. Expenses related to the defined contribution plan were $8.3 million , $8.9 million and $9.6 million in 2014 , 2015 and 2016 , respectively. Additionally, we sponsor two union pension plans that cover certain union employees (“USW plan” and “IUOE plan,” collectively, the “Union plans”) and a pension plan for all non-union employees (“Salaried plan”), and a postretirement benefit plan for selected employees. The annual measurement date of these plans is December 31. The following table presents the changes in benefit obligations and plan assets for pension benefits and other postretirement benefits for the years ended December 31, 2015 and 2016 (in thousands): Pension Benefits Other Postretirement Benefits 2015 2016 2015 2016 Change in benefit obligation: Benefit obligation at beginning of year $ 190,663 $ 209,591 $ 12,446 $ 11,314 Service cost 18,890 18,179 243 235 Interest cost 7,754 7,950 438 489 Plan participants’ contributions — — 199 217 Plan amendment (3,610 ) — — — Actuarial loss (gain) 574 1,050 (579 ) 1,481 Benefits paid (4,680 ) (10,053 ) (1,433 ) (725 ) Settlement payments — (747 ) — — Benefit obligation at end of year 209,591 225,970 11,314 13,011 Change in plan assets: Fair value of plan assets at beginning of year 127,267 142,742 — — Employer contributions 20,482 25,972 1,234 508 Plan participants’ contributions — — 199 217 Actual return on plan assets (327 ) 8,992 — — Benefits paid (4,680 ) (10,053 ) (1,433 ) (725 ) Settlement payments — (747 ) — — Fair value of plan assets at end of year 142,742 166,906 — — Funded status at end of year $ (66,849 ) $ (59,064 ) $ (11,314 ) $ (13,011 ) Accumulated benefit obligation $ 148,906 $ 160,642 At December 31, 2015, the USW and Salaried plans had a combined accumulated benefit obligation of $146.8 million , which exceeded the combined fair value of the plans’ assets of $140.6 million . At December 31, 2016, the fair value of each of our plans’ assets exceeded the accumulated benefit obligation of the related benefit plans. The Salaried and USW plans were amended effective January 1, 2016 to adjust the benefit calculation from a traditional final average pay formula to a cash balance formula for certain participants. We accounted for this change as a negative plan amendment, which resulted in a reduction of our pension liability at December 31, 2015 of $3.6 million . Amounts recognized in the consolidated balance sheets included in these financial statements were as follows (in thousands): Pension Benefits Other Postretirement Benefits 2015 2016 2015 2016 Amounts recognized in consolidated balance sheets: Current accrued benefit cost $ — $ — $ 612 $ 614 Long-term pension and benefits 66,849 59,064 10,702 12,397 66,849 59,064 11,314 13,011 Accumulated other comprehensive loss: Net actuarial loss (65,889 ) (62,013 ) (7,280 ) (7,881 ) Prior service credit 3,610 3,429 3,335 — (62,279 ) (58,584 ) (3,945 ) (7,881 ) Net amount of liabilities and accumulated other comprehensive loss recognized in consolidated balance sheets $ 4,570 $ 480 $ 7,369 $ 5,130 Net periodic benefit expense for the years ended December 31, 2014 , 2015 and 2016 were as follows (in thousands): Pension Benefits Other Postretirement Benefits 2014 2015 2016 2014 2015 2016 Components of net periodic pension and postretirement benefit expense: Service cost $ 13,400 $ 18,890 $ 18,179 $ 227 $ 243 $ 235 Interest cost 6,675 7,754 7,950 506 438 489 Expected return on plan assets (6,363 ) (8,037 ) (8,913 ) — — — Amortization of prior service cost (credit) 33 — (181 ) (3,713 ) (3,713 ) (3,335 ) Amortization of actuarial loss 3,071 6,306 4,645 915 885 880 Settlement cost 1,809 — 202 — — — Net periodic expense (credit) $ 18,625 $ 24,913 $ 21,882 $ (2,065 ) $ (2,147 ) $ (1,731 ) Other changes in plan assets and benefit obligations recognized in other comprehensive loss during 2014 , 2015 and 2016 were as follows (in thousands): Pension Benefits Other Postretirement Benefits 2014 2015 2016 2014 2015 2016 Beginning balance $ (36,184 ) $ (63,257 ) $ (62,279 ) $ 3,053 $ (1,696 ) $ (3,945 ) Net actuarial gain (loss) (31,986 ) (8,938 ) (971 ) (1,951 ) 579 (1,481 ) Plan amendment — 3,610 — — — — Amortization of prior service cost (credit) 33 — (181 ) (3,713 ) (3,713 ) (3,335 ) Amortization of actuarial loss 3,071 6,306 4,645 915 885 880 Settlement cost 1,809 — 202 — — — Amount recognized in other comprehensive loss (27,073 ) 978 3,695 (4,749 ) (2,249 ) (3,936 ) Ending balance $ (63,257 ) $ (62,279 ) $ (58,584 ) $ (1,696 ) $ (3,945 ) $ (7,881 ) Actuarial gains and losses are amortized over the average future service period of current active plan participants expected to receive benefits. The corridor approach is used to determine when actuarial gains and losses are to be amortized and is equal to 10 percent of the greater of the projected benefit obligation or the market related value of plan assets. The amount of gain or loss in excess of the calculated corridor is subject to amortization. The estimated net actuarial loss and prior service credit for the defined benefit pension plans that will be amortized from AOCL into net periodic benefit cost in 2017 are $4.1 million and $(0.2) million , respectively. The estimated net actuarial loss for the other defined benefit postretirement plan that will be amortized from AOCL into net periodic benefit cost in 2017 is $0.8 million . The weighted-average rate assumptions used to determine benefit obligations as of December 31, 2015 and 2016 were as follows: Pension Benefits Other Postretirement Benefits 2015 2016 2015 2016 Discount rate—Salaried plan (1) 3.95% 4.21% n/a n/a Discount rate—USW plan 3.82% 4.08% n/a n/a Discount rate—IUOE plan 4.03% 4.41% n/a n/a Discount rate—Other Postretirement Benefits n/a n/a 4.00% 3.85% Rate of compensation increase—Salaried plan (2) 4% - 11% 4% - 11% n/a n/a Rate of compensation increase—USW plan 3.50% 3.50% n/a n/a Rate of compensation increase—IUOE plan 5.00% 5.00% n/a n/a (1) The weighted-average discount rate excludes benefit obligations for which present value calculations are not applicable. (2) The rate of compensation increase assumption for the Salaried plan is calculated by 10-year age groupings beginning with ages 20-29 at 11% dropping to 4% by ages 70 and above. The weighted-average rate assumptions used to determine net pension and other postretirement benefit expense for the years ended December 31, 2014 , 2015 and 2016 were as follows: Pension Benefits Other Postretirement Benefits 2014 2015 2016 2014 2015 2016 Discount rate—Salaried plan 4.89% 3.91% 3.95% n/a n/a n/a Discount rate—USW plan 4.07% 3.56% 3.82% n/a n/a n/a Discount rate—IUOE plan 4.89% 3.93% 3.78% n/a n/a n/a Discount rate—Other Postretirement Benefits n/a n/a n/a 4.52% 3.66% 4.00% Rate of compensation increase—Salaried plan (1) 5.00% 5.50% 4% - 11% n/a n/a n/a Rate of compensation increase—USW plan 3.50% 3.50% 3.50% n/a n/a n/a Rate of compensation increase—IUOE plan 5.00% 5.00% 5.00% n/a n/a n/a Expected rate of return on plan assets—Salaried plan 6.00% 6.00% 6.00% n/a n/a n/a Expected rate of return on plan assets—USW plan 6.00% 6.00% 6.00% n/a n/a n/a Expected rate of return on plan assets—IUOE plan 6.00% 6.00% 6.00% n/a n/a n/a (1) The rate of compensation increase assumption for the Salaried plan in 2016 is calculated by 10-year age groupings beginning with ages 20-29 at 11% dropping to 4% by ages 70 and above. The non-pension postretirement benefit plans provide for retiree contributions and contain other cost-sharing features such as deductibles and coinsurance. The accounting for these plans anticipates future cost sharing that is consistent with management’s expressed intent to increase the retiree contribution rate generally in line with health care cost increases. The annual assumed rate of increase in the health care cost trend rate for 2017 is 5.5% decreasing systematically to 4.5% by 2080 for pre-65 year-old participants. The health care cost trend rate assumption has an effect on the amounts reported. As of December 31, 2016 , a 1.0% change in assumed health care cost trend rates would be immaterial to us. The fair values of the pension plan assets at December 31, 2015 were as follows (in thousands): Asset Category Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Domestic Equity Securities (a) : Small-cap fund $ 3,492 $ 3,492 $ — $ — Mid-cap fund 3,495 3,495 — — Large-cap fund 26,304 26,304 — — International equity fund 16,530 16,530 — — Fixed Income Securities (a) : Short-term bond funds 3,834 3,834 — — Intermediate-term bond funds 18,141 18,141 — — Long-term investment grade bond funds 66,758 66,758 — — Other: Short-term investment funds 3,944 3,944 — — Group annuity contract 244 — — 244 Fair value of plan assets $ 142,742 $ 142,498 $ — $ 244 (a) We hold equity and fixed income securities through investments in mutual funds, which are dedicated to each category as indicated. The fair values of the pension plan assets at December 31, 2016 were as follows (in thousands): Asset Category Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Domestic Equity Securities (a) : Small-cap fund $ 3,465 $ 3,465 $ — $ — Mid-cap fund 3,472 3,472 — — Large-cap funds 26,323 26,323 — — International equity fund 16,797 16,797 — — Fixed Income Securities (a) : Short-term bond funds 4,414 4,414 — — Intermediate-term bond funds 23,629 23,629 — — Long-term investment grade bond funds 83,240 83,240 — — Other: Short-term investment fund 5,346 5,346 — — Group annuity contract 220 — — 220 Fair value of plan assets $ 166,906 $ 166,686 $ — $ 220 (a) We hold equity and fixed income securities through investments in mutual funds, which are dedicated to each category as indicated. As reflected in the tables above, Level 3 activity was not material. The investment strategies for the various funds held as pension plan assets by asset category are as follows: Asset Category Fund’s Investment Strategy Domestic Equity Securities: Small-cap fund Seeks to track performance of the Center for Research in Security Prices (“CRSP”) US Small Cap Index Mid-cap fund Seeks to track performance of the CRSP US Mid Cap Index Large-cap funds Seek to track performance of the Standard & Poor’s 500 Index International equity fund Seeks long-term growth of capital by investing 65% or more of assets in international equities Fixed Income Securities: Short-term bond funds Seek current income with limited price volatility through investment in primarily high quality bonds Intermediate-term bond funds Seek moderate and sustainable level of current income by investing primarily in high quality fixed income securities with maturities from five to ten years Long-term investment grade bond funds Seek high and sustainable current income through investment primarily in long-term high grade bonds Other: Short-term investment fund Invests in high quality short-term money market instruments issued by the U.S. Treasury Group annuity contract Earns interest quarterly equal to the effective yield of the 91-day U.S. Treasury bill The expected long-term rate of return on plan assets was determined by combining a review of projected returns, historical returns of portfolios with assets similar to the current portfolios of the union and non-union pension plans and target weightings of each asset classification. Our investment objective for the assets within the pension plans is to earn a return that meets or exceeds the growth of obligations that result from interest and changes in the discount rate, while avoiding excessive risk. Defined diversification goals are set in order to reduce the risk of wide swings in the market value from year to year, or of incurring large losses that may result from concentrated positions. As a result, our plan assets have no significant concentrations of credit risk. Additionally, liquidity risks are minimized because all of the funds that the plans have invested in are publicly traded. We evaluate risks based on the potential impact of the predictability of contribution requirements, probability of under-funding, expected risk-adjusted returns and investment return volatility. Funds are invested with multiple investment managers. Our segment liabilities are calculated using rates defined by the Pension Protection Act of 2006. Investments are made so as to match the durations of the short and intermediate term pension liabilities. Additional investments are made to bring the overall investment allocation to 70% fixed income securities and 30% equity securities. The target allocation and actual weighted-average asset allocation percentages at December 31, 2015 and 2016 were as follows: 2015 2016 Actual Target Actual Target Equity securities 35% 30% 30% 30% Fixed income securities 62% 67% 67% 67% Other 3% 3% 3% 3% As of December 31, 2016 , the benefit amounts expected to be paid from plan assets through December 31, 2026 were as follows (in thousands): Pension Benefits Other Postretirement Benefits 2017 $ 13,783 $ 614 2018 $ 14,016 $ 685 2019 $ 13,245 $ 778 2020 $ 16,435 $ 857 2021 $ 14,438 $ 933 2022 through 2026 $ 72,826 $ 4,702 Contributions estimated to be paid by us into the plans in 2017 are $22.7 million and $0.5 million for the pension and other postretirement benefit plans, respectively.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Barry R. Pearl is an independent member of our general partner’s board of directors and was also a director of Targa Resources Partners, L.P. (“Targa”) through February 29, 2016. In the normal course of business, we purchase butane from subsidiaries of Targa. During Mr. Pearl’s tenure as a director of the general partner of Targa, we made purchases of butane from subsidiaries of Targa of $28.2 million , $25.5 million and $4.7 million for the years ended December 31, 2014, 2015 and 2016, respectively. We had recognized payables to Targa of $2.0 million at December 31, 2015 . Stacy P. Methvin was elected as an independent member of our general partner’s board of directors on April 23, 2015 and is also a director of one of our customers. We received tariff revenue of $9.3 million and $16.2 million for the period of April 23, 2015 through December 31, 2015 and the year ended December 31, 2016 , respectively, from this customer. We recorded a receivable of $1.3 million and $1.4 million from this customer at December 31, 2015 and 2016 , respectively. The tariff revenue we recognized from this customer was in the normal course of business, with rates determined in accordance with published tariffs. See Note 4 – Investments in Non-Controlled Entities for a discussion of transactions with our joint venture affiliates.

Debt

Debt	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Debt	Debt Long-term debt at December 31, 2015 and 2016 was as follows (in thousands): December 31, 2015 2016 Commercial paper $ 280,000 $ 50,000 5.65% Notes due 2016 250,000 — 6.40% Notes due 2018 250,000 250,000 6.55% Notes due 2019 550,000 550,000 4.25% Notes due 2021 550,000 550,000 3.20% Notes due 2025 250,000 250,000 5.00% Notes due 2026 — 650,000 6.40% Notes due 2037 250,000 250,000 4.20% Notes due 2042 250,000 250,000 5.15% Notes due 2043 550,000 550,000 4.20% Notes due 2045 250,000 250,000 4.25% Notes due 2046 — 500,000 Face value of long-term debt 3,430,000 4,100,000 Unamortized debt issuance costs (1) (18,672 ) (26,948 ) Net unamortized debt premium (1) 16,459 6,530 Net unamortized amount of gains from historical fair value hedges (1) 11,835 7,610 Long-term debt, net, including current portion 3,439,622 4,087,192 Less: current portion of long-term debt, net 250,335 — Long-term debt, net $ 3,189,287 $ 4,087,192 (1) Debt issuance costs, note discounts and premiums, and realized gains and losses of historical fair value hedges are being amortized or accreted to the applicable notes over the respective lives of those notes. All of the instruments detailed in the table above are senior indebtedness. At December 31, 2016 , maturities of our debt were as follows: $0 in 2017; $250.0 million in 2018; $550.0 million in 2019; $50.0 million in 2020; $550.0 million in 2021; and approximately $2.7 billion thereafter. 2016 Debt Offerings In September 2016, we issued $500.0 million of our 4.25% notes due 2046 in an underwritten public offering. The notes were issued at 98.762% of par. Net proceeds from this offering were approximately $488.5 million , after underwriting discounts and offering expenses of $5.3 million . The net proceeds from this offering were used to repay our $250.0 million of 5.65% notes due October 15, 2016 and to repay borrowings outstanding under our commercial paper program. The remaining proceeds were used for general partnership purposes, including capital expenditures. In February 2016, we issued $650.0 million of our 5.00% notes due 2026 in an underwritten public offering. The notes were issued at 99.875% of par. Net proceeds from this offering were approximately $643.8 million , after underwriting discounts and offering expenses of $5.4 million . The net proceeds from this offering were used to repay borrowings outstanding under our commercial paper program and for general partnership purposes, including expansion capital. Other Debt Revolving Credit Facilities. At December 31, 2016, the total borrowing capacity under our revolving credit facility maturing October 27, 2020 was $1.0 billion . Any borrowings outstanding under this facility are classified as long-term debt on our consolidated balance sheets. Borrowings under the facility are unsecured and bear interest at LIBOR plus a spread ranging from 1.000% to 1.625% based on our credit ratings. Additionally, an unused commitment fee is assessed at a rate from 0.100% to 0.275% depending on our credit ratings. The unused commitment fee was 0.125% at December 31, 2016. Borrowings under this facility may be used for general purposes, including capital expenditures. As of December 31, 2015 and 2016 , respectively, there were no borrowings outstanding under this facility, with $6.3 million obligated for letters of credit. Amounts obligated for letters of credit are not reflected as debt on our consolidated balance sheets, but decrease our borrowing capacity under the facility. In October 2016, we amended our $250.0 million 364 -day revolving credit facility to extend the maturity date to October 19, 2017. Any borrowings under this facility are classified as current debt on our consolidated balance sheets. Borrowings under this facility are unsecured and bear interest at LIBOR plus a spread ranging from 1.000% to 1.625% based on our credit ratings. Additionally, an unused commitment fee is assessed at a rate between 0.080% and 0.225% depending on our credit ratings. The unused commitment fee was 0.100% at December 31, 2016. Borrowings under this facility may be used for general purposes, including capital expenditures. As of December 31, 2016, there were no borrowings outstanding under this facility. Our revolving credit facilities require us to maintain a specified ratio of consolidated debt to EBITDA (as defined in the credit agreement) of no greater than 5.0 to 1.0. In addition, the revolving credit facilities and the indentures under which our senior notes were issued contain covenants that limit our ability to, among other things, incur indebtedness secured by certain liens or encumber our assets, engage in certain sale-leaseback transactions and consolidate, merge or dispose of all or substantially all of our assets. We were in compliance with these covenants as of and during the year ended December 31, 2016 . Commercial Paper Program. We have a commercial paper program under which we may issue commercial paper notes in an amount up to the available capacity under our $1.0 billion revolving credit facility. The maturities of the commercial paper notes vary, but may not exceed 397 days from the date of issuance. Because the commercial paper we can issue is limited to amounts available under our revolving credit facility, amounts outstanding under the program are classified as long-term debt. The commercial paper notes are sold under customary terms in the commercial paper market and are issued at a discount from par, or alternatively, are sold at par and bear varying interest rates on a fixed or floating basis. The weighted-average interest rate for commercial paper borrowings based on the number of days outstanding was 0.5% and 0.8% , respectively, for the year ended December 31, 2015 and 2016 . During the years ending December 31, 2014 , 2015 and 2016 , total cash payments for interest on all indebtedness, excluding the impact of related interest rate swap agreements, were $149.5 million , $156.6 million and $181.7 million , respectively.

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments Interest Rate Derivatives We periodically enter into interest rate derivatives to hedge the fair value of debt or hedge against variability in interest rates, and we have historically designated these derivatives as fair value or cash flow hedges for accounting purposes. Adjustments resulting from discontinued hedges continue to be recognized in accordance with their historic hedging relationships. During 2016, we entered into $100.0 million of forward-starting interest rate swap agreements to hedge against the risk of variability of future interest payments on a portion of debt we anticipate issuing in 2018. The fair values of these contracts at December 31, 2016 were recorded on our balance sheets as other noncurrent assets of $14.1 million , with the net offset recorded to other comprehensive income. We account for these agreements as cash flow hedges. During 2015 and 2016, we entered into $250.0 million of forward-starting interest rate swap agreements to hedge against the risk of variability of future interest payments on a portion of debt we anticipated issuing in 2016. We accounted for these agreements as cash flow hedges. When we issued $500.0 million of 4.25% notes due 2046 in third quarter 2016, we settled the associated interest rate swap agreements for a loss of $19.3 million . The loss was recorded to other comprehensive income and will be recognized into earnings as an adjustment to our periodic interest expense accruals over the first ten years of the associated notes. This loss was also reported as a net payment on financial derivatives in the financing activities of our consolidated statements of cash flows in 2016. During 2014, we entered into $250.0 million of forward-starting interest rate swap agreements to hedge against the risk of variability of future interest payments on a portion of debt we anticipated issuing in 2015. We accounted for these agreements as cash flow hedges. When we issued the $250.0 million of 4.20% notes due 2045 in first quarter 2015, we settled the associated interest rate swap agreements for a loss of $42.9 million . The loss was recorded to other comprehensive income and will be recognized into earnings as an adjustment to our periodic interest expense accruals over the life of the associated notes. This loss was also reported as a net payment on financial derivatives in the financing activities of our consolidated statements of cash flows in 2015. Also during 2014, we entered into $200.0 million of interest rate swap agreements to hedge against the variability of future interest payments on an anticipated debt issuance. We accounted for these agreements as cash flow hedges. When we issued $250.0 million of 5.15% notes due 2043 later in the first quarter of 2014, we settled the associated interest rate swap agreements for a loss of $3.6 million . The loss was recorded to other comprehensive income and is being recognized into earnings as an adjustment to our periodic interest expense accruals over the life of the associated notes. This loss was also reported as net payment on financial derivatives in the financing activities of our consolidated statements of cash flows in 2014. Commodity Derivatives Hedging Strategies Our butane blending activities produce gasoline products, and we can reasonably estimate the timing and quantities of sales of these products. We use a combination of exchange-based commodities futures contracts and forward purchase and sale contracts to help manage commodity price changes and mitigate the risk of decline in the product margin realized from our butane blending activities. Further, certain of our other commercial operations generate petroleum products and we also use futures contracts to hedge against price changes for some of these commodities. We account for the forward physical purchase and sale contracts we use in our butane blending and fractionation activities as normal purchases and sales. Forward contracts that qualify for and are elected as normal purchases and sales are accounted for using traditional accrual accounting. The futures contracts that we enter into fall into one of three hedge categories: Hedge Type Hedge Purpose Accounting Treatment Qualifies for Hedge Accounting Treatment Cash Flow Hedge To hedge the variability in cash flows related to a forecasted transaction. The effective portion of changes in the fair value of the hedge is recorded to accumulated other comprehensive income/loss and reclassified to earnings when the forecasted transaction occurs. Any ineffectiveness is recognized currently in earnings. Fair Value Hedge To hedge against changes in the fair value of a recognized asset or liability. The effective portion of changes in the fair value of the hedge is recorded as adjustments to the asset or liability being hedged. Any ineffectiveness and amounts excluded from the assessment of hedge effectiveness is recognized currently in earnings. Does not Qualify For Hedge Accounting Treatment Economic Hedge To effectively serve as either a fair value or a cash flow hedge; however, the derivative agreement does not qualify for hedge accounting treatment under ASC 815, Derivatives and Hedging . Changes in the fair value of these agreements are recognized currently in earnings. During the years ended December 31, 2015 and 2016 , none of the commodity hedging contracts we entered into qualified for or were designated as cash flow hedges. We use futures contracts designated as economic hedges for accounting purposes to hedge against changes in the price of refined products and crude oil that we expect to sell in the future. Period changes in the fair value of these agreements are recognized currently in earnings as adjustments to product sales. We also use futures contracts designated as economic hedges for accounting purposes to hedge against changes in the price of butane we expect to purchase in the future. Period changes in the fair value of these agreements are recognized currently in earnings as adjustments to cost of product sales. We hold petroleum product inventories that we obtain from overages on our pipeline systems. We use futures contracts that are designated as economic hedges for accounting purposes to help manage price changes related to these inventory barrels. Period changes in the fair value of these agreements are recognized currently in earnings as adjustments to operating expense. Additionally, we hold certain crude oil tank bottoms which we classify as long-term assets and include with other noncurrent assets on our consolidated balance sheets. We use futures contracts to hedge against changes in the fair value of these assets. We record the effective portion of the gains or losses for those contracts that qualify as fair value hedges as adjustments to the asset being hedged and the ineffective portions as well as amounts excluded from the assessment of hedge effectiveness as adjustments to other income or expense. As outlined in the table below, our open futures contracts at December 31, 2016 were as follows: Type of Contract/Accounting Methodology Product Represented by the Contract and Associated Barrels Maturity Dates Futures - Fair Value Hedges 0.7 million barrels of crude oil November 2017 Futures - Economic Hedges 3.9 million barrels of refined products and crude oil Between January and April 2017 Futures - Economic Hedges 0.7 million barrels of butane Between January and April 2017 Energy Commodity Derivatives Contracts and Deposits Offsets At December 31, 2016, we had made margin deposits of $49.9 million for our futures contracts with our counterparties, which were recorded as a current asset under energy commodity derivatives deposits on our consolidated balance sheets. At December 31, 2015, we had received margin deposits of $24.3 million which were recorded as a current liability under energy commodity derivatives deposits on our consolidated balance sheets. We have the right to offset the combined fair values of our open futures contracts against our margin deposits under a master netting arrangement for each counterparty; however, we have elected to present the combined fair values of our open futures contracts separately from the related margin deposits on our consolidated balance sheets. Additionally, we have the right to offset the fair values of our futures contracts together for each counterparty, which we have elected to do, and we report the combined net balances on our consolidated balance sheets. A schedule of the derivative amounts we have offset and the deposit amounts we could offset under a master netting arrangement are provided below as of December 31, 2015 and 2016 (in thousands): December 31, 2015 Description Gross Amounts of Recognized Assets Gross Amounts of Liabilities Offset in the Consolidated Balance Sheets Net Amounts of Assets Presented in the Consolidated Balance Sheets (1) Margin Deposit Amounts Not Offset in the Consolidated Balance Sheets Net Asset Amount (2) Energy commodity derivatives $ 48,367 $ (5,646 ) $ 42,721 $ (24,252 ) $ 18,469 December 31, 2016 Description Gross Amounts of Recognized Liabilities Gross Amounts of Assets Offset in the Consolidated Balance Sheets Net Amounts of Liabilities Presented in the Consolidated Balance Sheets Margin Deposit Amounts Not Offset in the Consolidated Balance Sheets Net Asset Amount (2) Energy commodity derivatives $ (36,798 ) $ 6,060 $ (30,738 ) $ 49,899 $ 19,161 (1) Net amount includes energy commodity derivative contracts classified as current assets, net of $39,243 and noncurrent assets of $3,478 . (2) This represents the maximum amount of loss we would incur if our counterparties failed to perform on their derivative contracts. Impact of Derivatives on Our Financial Statements Comprehensive Income The changes in derivative activity included in AOCL for the years ended December 31, 2014 , 2015 and 2016 were as follows (in thousands): Year Ended December 31, Derivative Gains (Losses) Included in AOCL 2014 2015 2016 Beginning balance $ 13,627 $ (16,587 ) $ (30,126 ) Net loss on interest rate contract cash flow hedges (30,090 ) (14,904 ) (6,699 ) Reclassification of net loss (gain) on cash flow hedges to income (124 ) 1,365 2,049 Ending balance $ (16,587 ) $ (30,126 ) $ (34,776 ) The following is a summary of the effect on our consolidated statements of income for the years ended December 31, 2014 , 2015 and 2016 of derivatives accounted for under ASC 815-30, Derivatives and Hedging—Cash Flow Hedges , that were designated as hedging instruments (in thousands). Year Ended December 31, 2014 Derivative Instrument Amount of Loss Recognized in AOCL on Derivative Location of Gain (Loss) Reclassified from AOCL into Income Amount of Gain (Loss) Reclassified from AOCL into Income Effective Portion Ineffective Portion Interest rate contracts $ (30,090 ) Interest expense $ (242 ) $ 366 Year Ended December 31, 2015 Derivative Instrument Amount of Loss Recognized in AOCL on Derivative Location of Loss Reclassified from AOCL into Income Amount of Loss Reclassified from AOCL into Income Effective Portion Ineffective Portion Interest rate contracts $ (14,904 ) Interest expense $ (1,365 ) $ — Year Ended December 31, 2016 Derivative Instrument Amount of Loss Recognized in AOCL on Derivative Location of Loss Reclassified from AOCL into Income Amount of Loss Reclassified from AOCL into Income Effective Portion Ineffective Portion Interest rate contracts $ (6,699 ) Interest expense $ (2,049 ) $ — As of December 31, 2016 , the net loss estimated to be classified to interest expense over the next twelve months from AOCL is approximately $3.0 million . This amount relates to the amortization of the hedged losses on the interest rate swap contracts over the life of the related debt instruments. We use futures contracts designated as fair value hedges under ASC 815-25, Derivatives and Hedging—Fair Value Hedges, to hedge against changes in the fair value of 0.7 million barrels of crude oil that are contractually reserved as tank bottoms and included with other noncurrent assets on our consolidated balance sheets. The effective portions of the fair value gains or losses on these futures contracts were offset by fair value gains or losses on the tank bottoms. There was no ineffectiveness recognized on these hedges. The cash flows from settled contracts were recorded in operating activities in our consolidated statements of cash flows. The gains (losses) on these futures contracts and the underlying tank bottoms were as follows (in millions): Year Ended December 31, 2014 2015 2016 Gain (loss) recognized in other income/expense on derivative (futures contracts) $ 13.5 $ 15.6 $ (9.0 ) Gain (loss) recognized in other income/expense on hedged item (tank bottoms) $ (13.5 ) $ (15.6 ) $ 9.0 The differential between the current spot price and forward price is excluded from the assessment of hedge effectiveness for these fair value hedges. During 2014 , 2015 and 2016 , we recognized a gain (loss) of $(8.6) million , $1.0 million and $5.2 million , respectively, for the amounts we excluded from the assessment of effectiveness of these fair value hedges, which we reported as other income/expense on our consolidated statements of income. The following table provides a summary of the effect on our consolidated statements of income for the years ended December 31, 2014 , 2015 and 2016 of derivatives accounted for under ASC 815, Derivatives and Hedging , that were not designated as hedging instruments (in thousands): Amount of Gain (Loss) Year Ended December 31, Derivative Instrument Location of Gain (Loss) Recognized on Derivative 2014 2015 2016 Futures contracts Product sales revenue $ 145,320 $ 68,426 $ (38,584 ) Futures contracts Operating expenses 17,818 11,819 (5,000 ) Futures contracts Cost of product sales (17,141 ) (8,997 ) 10,998 Total $ 145,997 $ 71,248 $ (32,586 ) The impact of the derivatives in the above table was reflected as cash from operations on our consolidated statements of cash flows. Balance Sheets The following tables provide a summary of the fair value of derivatives accounted for under ASC 815, Derivatives and Hedging , which are presented on a net basis in our consolidated balance sheets, that were designated as hedging instruments as of December 31, 2015 and 2016 (in thousands): December 31, 2015 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ 60 Energy commodity derivatives contracts, net $ — Futures contracts Other noncurrent assets 3,478 Other noncurrent liabilities — Interest rate contracts Other current assets 2,179 Other current liabilities 653 Total $ 5,717 Total $ 653 December 31, 2016 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ — Energy commodity derivatives contracts, net $ 3,079 Interest rate contracts Other noncurrent assets 14,114 Other noncurrent liabilities — Total $ 14,114 Total $ 3,079 The following tables provide a summary of the fair value of derivatives accounted for under ASC 815, Derivatives and Hedging , which are presented on a net basis in our consolidated balance sheets, that were not designated as hedging instruments as of December 31, 2015 and 2016 (in thousands): December 31, 2015 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ 44,829 Energy commodity derivatives contracts, net $ 5,646 December 31, 2016 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ 6,060 Energy commodity derivatives contracts, net $ 33,719 See Note 19 – Fair Value Disclosure s for additional details regarding our derivative contracts.

Leases

Leases	12 Months Ended
	Dec. 31, 2016
Leases [Abstract]
Leases	Leases Leases—Lessee. We lease office buildings, terminal equipment and pipeline capacity (primarily to facilitate movements on our Longhorn pipeline and Little Rock pipeline extension) to conduct our business operations. We have also entered into land leases and right-of-way contracts, several of which have cancellation penalties that include the requirement to remove our pipeline from the property for non-performance. Several of our agreements provide for negotiated renewal options, and management expects that we will generally renew our expiring leases. Leases are evaluated at inception or at any subsequent material modification and, depending on the lease terms, are classified as either capital or operating leases, as appropriate under ASC 840, Leases . We recognize rent expense on a straight-line basis over the life of the lease. Total rent expense was $21.0 million , $25.7 million and $30.2 million for the years ended December 31, 2014 , 2015 and 2016 , respectively. Future minimum annual rentals under non-cancellable operating leases with initial or remaining terms greater than one year as of December 31, 2016 , were as follows (in millions): 2017 $ 38.6 2018 32.9 2019 21.1 2020 17.8 2021 17.4 Thereafter 110.6 Total $ 238.4 Leases—Lessor. We have entered into capacity leases and storage contracts with our customers with remaining terms from one to approximately 20 years that are accounted for as operating-type leases. All of the agreements provide for negotiated extensions. Future minimum payments receivable under these arrangements as of December 31, 2016 , were as follows (in millions): 2017 $ 227.6 2018 208.7 2019 158.8 2020 109.6 2021 77.0 Thereafter 188.5 Total $ 970.2 Direct Financing Lease. We entered into a long-term throughput and deficiency agreement with a customer on a 40 -mile pipeline we constructed in Texas and New Mexico, which contains minimum volume/payment commitments. This agreement is being accounted for as a direct financing lease. The net investment under direct financing leasing arrangements as of December 31, 2015 and 2016 was as follows (in millions): December 31, 2015 December 31, 2016 Total minimum lease payments receivable $ 30.7 $ 23.3 Less: Unearned income 5.8 4.8 Recorded net investment in direct financing lease $ 24.9 $ 18.5 The net investment in direct financing leases was classified in the consolidated balance sheets as follows (in millions): December 31, 2015 December 31, 2016 Other accounts receivable $ 6.4 $ 3.4 Long-term receivables 18.5 15.1 Total $ 24.9 $ 18.5 Future minimum payments receivable under this direct financing lease for the next five years are: 2017 – $4.1 million ; 2018 – $1.7 million ; 2019 – $1.7 million ; 2020 – $1.7 million ; and 2021 – $1.7 million .

Long-Term Incentive Plan

Long-Term Incentive Plan	12 Months Ended
	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Long-Term Incentive Plan	Long-Term Incentive Plan Plan Description We have a long-term incentive plan (“LTIP”) covering certain of our employees and independent directors of our general partner. The LTIP primarily consists of phantom units and permits the grant of awards covering an aggregate of 11.9 million of our limited partner units. The estimated units remaining available under the LTIP at December 31, 2016 total approximately 3.0 million . The compensation committee of our general partner’s board of directors administers our LTIP. Under our LTIP, the compensation committee has granted performance-based and time-based phantom unit awards. Time-based awards are subject to forfeiture by a participant if their employment is terminated for any reason other than retirement, death or disability prior to the vesting date. In addition, there are certain other employment restrictions that can result in the forfeiture of these awards. Performance-based awards are subject to forfeiture by a participant if their employment is terminated for any reason other than for a termination within two years of a change-in-control that occurs on an involuntary basis without cause or on a voluntary basis for good cause, or due to retirement, disability or death prior to the vesting date. If a performance-based or time-based award recipient retires, dies or becomes disabled prior to the end of the vesting period, the recipient’s award will be prorated based upon the completed months of employment during the vesting period, and the award will be settled shortly after the end of the vesting period. Our agreement with the LTIP participants requires these awards to be paid in our limited partner units. Performance-based awards granted under our LTIP can vest early under certain circumstances following a change in control of our general partner. The payouts for the performance-based phantom unit awards issued in 2014, 2015 and 2016 are each subject to the attainment of a financial metric and market performance adjustments. The payout of the performance-based awards is based on our distributable cash flow excluding commodity-related activities for the last year of each of the 3 -year vesting periods as compared against established threshold, target and stretch goals. The payouts for the performance-related component of the awards can range from 0% for below threshold results, up to 200% for actual results at stretch or above. The market performance adjustment component of the awards is based on our total unitholder return over the 3 -year vesting period of the awards in relation to the total unitholder returns of certain peer entities and can increase or decrease the calculated performance-based payout of the award by as much as 50% . These awards are classified as equity awards. The payout for the time-based phantom unit awards that have been granted by the compensation committee is subject only to the participant’s continued employment with us. These awards are classified as equity awards. Non-Vested Unit Awards The following table includes the changes during the current fiscal year in the number of non-vested units that have been granted by the compensation committee. The amounts below do not include adjustments for above-target or below-target performance. Performance-Based Awards Time-Based Awards Total Awards Number of Unit Awards Weighted-Average Fair Value Number of Unit Awards Weighted-Average Fair Value Number of Unit Awards Weighted-Average Fair Value Non-vested units - 1/1/2016 313,240 $ 79.64 57,682 $ 81.74 370,922 $ 79.97 Units granted during 2016 193,344 $ 70.29 39,301 $ 64.76 232,645 $ 69.35 Units vested during 2016 (163,632 ) $ 72.32 (9,511 ) $ 71.40 (173,143 ) $ 72.27 Units forfeited during 2016 (29,256 ) $ 76.08 (5,054 ) $ 73.20 (34,310 ) $ 75.66 Non-vested units - 12/31/16 313,696 $ 78.03 82,418 $ 75.36 396,114 $ 77.47 The table below summarizes the total non-vested unit awards outstanding adjusted for estimated amounts of above-target financial performance to determine the total number of unit awards included in our total equity-based liability accrual. Grant Date Non-Vested Unit Awards Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results Total Unit Award Accrual Vesting Date Unrecognized Compensation Expense (a) (in millions) Performance-Based Awards: 2015 Awards 131,335 32,834 164,169 12/31/2017 $ 4.8 2016 Awards 182,361 — 182,361 12/31/2018 8.5 Time-Based Awards: 2017 Vesting Date 50,488 — 50,488 12/31/2017 1.5 2018 Vesting Date 30,456 — 30,456 12/31/2018 1.3 2020 Vesting Date 1,474 — 1,474 12/31/2020 0.1 Total 396,114 32,834 428,948 $ 16.2 (a) Unrecognized compensation expense will be recognized over the remaining vesting period of the awards. Weighted-Average Fair Value The weighted-average fair value of awards granted issued during 2014 , 2015 and 2016 were as follows: Performance-Based Awards Time-Based Awards Number of Unit Awards Weighted-Average Fair Value Number of Unit Awards Weighted-Average Fair Value Units granted during 2014 187,371 $ 72.77 33,903 $ 82.86 Units granted during 2015 148,028 $ 88.78 26,421 $ 81.51 Units granted during 2016 193,344 $ 70.29 39,301 $ 64.76 Vested Unit Awards The table below sets forth the numbers and values of units that vested in each of the three years ended December 31, 2016 . The vested limited partner units include adjustments for above-target financial and market performance. Vesting Date Vested Limited Partner Units Fair Value of Unit Awards on Vesting Date (in millions) Intrinsic Value of Unit Awards on Vesting Date (in millions) 12/31/2014 528,984 $22.4 $43.7 12/31/2015 506,393 $27.7 $34.4 12/31/2016 361,711 $22.6 $27.4 Cash Flow Effects of LTIP Settlements We settle awards that vest by issuing limited partner units. The difference between the limited partner units issued to the participants and the total units accrued represents the minimum tax withholdings associated with the award settlement, which we pay in cash. Settlement Date Number of Limited Partner Units Issued, Net of Tax Withholdings Minimum Tax Withholdings (in millions) Employer Taxes (in millions) Total Cash Taxes Paid (in millions) January 2014 387,216 $14.8 $1.2 $16.0 January 2015 354,529 $17.8 $1.7 $19.5 February 2016 350,552 $14.4 $1.4 $15.8 Compensation Expense Summary Equity-based incentive compensation expense for 2014 , 2015 and 2016 was as follows (in thousands): Year Ended December 31, 2014 2015 2016 2012 awards $ 8,314 $ — $ — 2013 awards 10,852 10,658 — 2014 awards 6,494 7,471 7,928 2015 awards — 4,917 4,874 2016 awards — — 4,304 Time-based awards 1,624 1,199 2,252 Total $ 27,284 $ 24,245 $ 19,358 Allocation of LTIP expense on our consolidated statements of income: G&A expense $ 26,700 $ 23,937 $ 19,204 Operating expense 584 308 154 Total $ 27,284 $ 24,245 $ 19,358

Segment Disclosures

Segment Disclosures	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Segment Disclosures	Segment Disclosures Our reportable segments are strategic business units that offer different products and services. Our segments are managed separately because each segment requires different marketing strategies and business knowledge. Management evaluates performance based on segment operating margin, which includes revenue from affiliates and external customers, operating expenses, cost of product sales and earnings of non-controlled entities. We believe that investors benefit from having access to the same financial measures used by management. Operating margin, which is presented in the following tables, is an important measure used by management to evaluate the economic performance of our core operations. Operating margin is not a GAAP measure, but the components of operating margin are computed using amounts that are determined in accordance with GAAP. A reconciliation of operating margin to operating profit, which is its nearest comparable GAAP financial measure, is included in the tables below. Operating profit includes depreciation and amortization expense and G&A expense that management does not consider when evaluating the core profitability of our separate operating segments. Year Ended December 31, 2014 (in thousands) Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 946,612 $ 341,915 $ 170,740 $ — $ 1,459,267 Product sales revenue 872,537 — 6,437 — 878,974 Affiliate management fee revenue — 20,790 1,321 — 22,111 Total revenue 1,819,149 362,705 178,498 — 2,360,352 Operating expenses 356,057 83,184 65,173 (3,513 ) 500,901 Cost of product sales 592,887 — 1,698 — 594,585 (Earnings) loss of non-controlled entities — (16,309 ) (3,085 ) — (19,394 ) Operating margin 870,205 295,830 114,712 3,513 1,284,260 Depreciation and amortization expense 101,642 27,800 28,786 3,513 161,741 G&A expenses 96,411 29,557 22,320 — 148,288 Operating profit $ 672,152 $ 238,473 $ 63,606 $ — $ 974,231 Additions to long-lived assets $ 163,753 $ 439,846 $ 18,413 $ 622,012 As of December 31, 2014 Segment assets $ 2,875,412 $ 1,937,242 $ 647,900 $ 5,460,554 Corporate assets 40,855 Total assets $ 5,501,409 Goodwill $ 38,369 $ 12,082 $ 2,809 $ 53,260 Investments in non-controlled entities $ — $ 599,757 $ 14,110 $ 613,867 Year Ended December 31, 2015 (in thousands) Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 974,505 $ 394,098 $ 176,143 $ — $ 1,544,746 Product sales revenue 623,102 3,587 3,147 — 629,836 Affiliate management fee revenue — 12,495 1,376 — 13,871 Total revenue 1,597,607 410,180 180,666 — 2,188,453 Operating expenses 377,772 89,455 62,526 (3,851 ) 525,902 Cost of product sales 442,621 3,278 1,374 — 447,273 (Earnings) loss of non-controlled entities 193 (63,918 ) (2,758 ) — (66,483 ) Operating margin 777,021 381,365 119,524 3,851 1,281,761 Depreciation and amortization expense 96,244 35,681 31,036 3,851 166,812 G&A expenses 94,482 36,000 20,847 — 151,329 Operating profit $ 586,295 $ 309,684 $ 67,641 $ — $ 963,620 Additions to long-lived assets $ 310,907 $ 289,851 $ 70,290 $ 671,048 As of December 31, 2015 Segment assets $ 2,991,322 $ 2,313,110 $ 677,914 $ 5,982,346 Corporate assets 59,221 Total assets $ 6,041,567 Goodwill $ 38,369 $ 12,082 $ 2,809 $ 53,260 Investments in non-controlled entities $ 12,381 $ 739,470 $ 13,777 $ 765,628 Year Ended December 31, 2016 (in thousands) Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 1,002,368 $ 407,837 $ 181,721 $ (807 ) $ 1,591,119 Product sales revenue 561,759 31,170 6,673 — 599,602 Affiliate management fee revenue 765 12,533 1,391 — 14,689 Total revenue 1,564,892 451,540 189,785 (807 ) 2,205,410 Operating expenses 381,055 88,762 65,704 (5,762 ) 529,759 Cost of product sales 459,989 31,657 1,692 — 493,338 (Earnings) loss of non-controlled entities 968 (76,972 ) (2,692 ) — (78,696 ) Operating margin 722,880 408,093 125,081 4,955 1,261,009 Depreciation and amortization expense 103,388 38,081 31,718 4,955 178,142 G&A expenses 91,795 36,305 19,715 — 147,815 Operating profit $ 527,697 $ 333,707 $ 73,648 $ — $ 935,052 Additions to long-lived assets $ 291,202 $ 250,433 $ 104,728 $ 646,363 As of December 31, 2016 Segment assets $ 3,289,600 $ 2,631,407 $ 791,132 $ 6,712,139 Corporate assets 59,934 Total assets $ 6,772,073 Goodwill $ 38,369 $ 12,082 $ 2,809 $ 53,260 Investments in non-controlled entities $ 31,029 $ 886,920 $ 13,306 $ 931,255

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Environmental Liabilities Liabilities recognized for estimated environmental costs were $31.4 million and $24.0 million at December 31, 2015 and December 31, 2016 , respectively. We have classified environmental liabilities as current or noncurrent based on management’s estimates regarding the timing of actual payments. Environmental expenses recognized as a result of changes in our environmental liabilities are included in operating expenses on our consolidated statements of income. Environmental expenses were $5.0 million , $8.4 million and $5.9 million for the years ended December 31, 2014 , 2015 and 2016 , respectively. Environmental Receivables Receivables from insurance carriers and other third parties related to environmental matters at December 31, 2015 were $2.6 million , of which $0.7 million and $1.9 million were recorded to other accounts receivable and long-term receivables, respectively, on our consolidated balance sheets. Receivables from insurance carriers related to environmental matters at December 31, 2016 were $4.1 million , of which $0.6 million and $3.5 million were recorded to other accounts receivable and long-term receivables, respectively, on our consolidated balance sheets. Amounts received from insurance carriers and other third parties related to environmental matters during 2014 , 2015 and 2016 were $0.5 million , $0.5 million and $0.9 million , respectively. Other We are a party to various other claims, legal actions and complaints arising in the ordinary course of business, including without limitation those disclosed in Item 3. Legal Proceedings of Part I of this annual report on Form 10-K. While the results cannot be predicted with certainty, management believes the ultimate resolution of these claims, legal actions and complaints after consideration of amounts accrued, insurance coverage or other indemnification arrangements will not have a material adverse effect on our results of operations, financial position or cash flows.

Quarterly Financial Data

Quarterly Financial Data	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data	Quarterly Financial Data (unaudited) Summarized quarterly financial data is as follows (in thousands, except per unit amounts): 2015 First Quarter Second Quarter Third Quarter Fourth Quarter Revenue $ 530,302 $ 498,427 $ 586,676 $ 573,048 Total costs and expenses $ 320,081 $ 315,206 $ 312,527 $ 343,502 Operating margin $ 297,006 $ 286,145 $ 369,325 $ 329,285 Net income $ 183,636 $ 177,391 $ 250,972 $ 207,123 Basic net income per limited partner unit $ 0.81 $ 0.78 $ 1.10 $ 0.91 Diluted net income per limited partner unit $ 0.81 $ 0.78 $ 1.10 $ 0.91 2016 Revenue $ 519,816 $ 518,897 $ 551,782 $ 614,915 Total costs and expenses $ 321,446 $ 307,709 $ 336,409 $ 383,490 Operating margin $ 300,626 $ 304,371 $ 316,830 $ 339,182 Net income $ 207,070 $ 187,859 $ 194,551 $ 213,291 Basic net income per limited partner unit $ 0.91 $ 0.82 $ 0.85 $ 0.94 Diluted net income per limited partner unit $ 0.91 $ 0.82 $ 0.85 $ 0.93

Fair Value Disclosures

Fair Value Disclosures	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Disclosures	Fair Value Disclosures Fair Value Methods and Assumptions - Financial Assets and Liabilities The following methods and assumptions were used in estimating fair value for our financial assets and liabilities: • Energy commodity derivatives contracts . These include exchange-traded futures contracts related to petroleum products. These contracts are carried at fair value on our consolidated balance sheets and are valued based on quoted prices in active markets. See Note 13 – Derivative Financial Instruments for further disclosures regarding these contracts. • Interest rate contracts. These include forward-starting interest rate swap agreements to hedge against the risk of variability of interest payments on future debt. These contracts are carried at fair value on our consolidated balance sheets and are valued based on an assumed exchange, at the end of each period, in an orderly transaction with a market participant in the market in which the financial instrument is traded. The exchange value was calculated using present value techniques on estimated future cash flows based on forward interest rate curves. See Note 13 – Derivative Financial Instruments for further disclosures regarding these contracts. • Long-term receivables. These primarily include payments receivable under a direct-financing leasing arrangement and cost reimbursement payments receivable. These receivables were recorded at fair value on our consolidated balance sheets, using then-current market rates to estimate the present value of future cash flows. • Debt. The fair value of our publicly traded notes was based on the prices of those notes at December 31, 2015 and 2016 ; however, where recent observable market trades were not available, prices were determined using adjustments to the last traded value for that debt issuance or by adjustments to the prices of similar debt instruments of peer entities that are actively traded. The carrying amount of borrowings, if any, under our revolving credit facility and our commercial paper program approximates fair value due to the frequent repricing of these obligations. Fair Value Measurements - Financial Assets and Liabilities The following tables summarize the carrying amounts, fair values and fair value measurements recorded or disclosed as of December 31, 2015 and 2016 , based on the three levels established by ASC 820; Fair Value Measurements and Disclosures (in thousands): Fair Value Measurements as of December 31, 2015 using: Assets (Liabilities) Carrying Amount Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Energy commodity derivatives contracts $ 42,721 $ 42,721 $ 42,721 $ — $ — Interest rate contracts $ 1,526 $ 1,526 $ — $ 1,526 $ — Long-term receivables $ 20,374 $ 20,374 $ — $ — $ 20,374 Debt $ (3,439,622 ) $ (3,284,791 ) $ — $ (3,284,791 ) $ — Fair Value Measurements as of December 31, 2016 using: Assets (Liabilities) Carrying Amount Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Energy commodity derivatives contracts $ (30,738 ) $ (30,738 ) $ (30,738 ) $ — $ — Interest rate contracts $ 14,114 $ 14,114 $ — $ 14,114 $ — Long-term receivables $ 23,870 $ 23,870 $ — $ — $ 23,870 Debt $ (4,087,192 ) $ (4,262,321 ) $ — $ (4,262,321 ) $ —

Distributions

Distributions	12 Months Ended
	Dec. 31, 2016
Distributions Made to Members or Limited Partners [Abstract]
Distributions	Distributions Distributions we paid during 2014 , 2015 and 2016 were as follows (in thousands, except per unit amount): Payment Date Per Unit Cash Distribution Amount Total Cash Distribution 2/14/2014 $ 0.5850 $ 132,835 5/15/2014 0.6125 139,079 8/14/2014 0.6400 145,324 11/14/2014 0.6675 151,568 Total $ 2.5050 $ 568,806 2/13/2015 $ 0.6950 $ 158,061 5/15/2015 0.7175 163,178 8/14/2015 0.7400 168,296 11/13/2015 0.7625 173,413 Total $ 2.9150 $ 662,948 2/12/2016 $ 0.7850 $ 178,808 5/13/2016 0.8025 182,797 8/12/2016 0.8200 186,783 11/14/2016 0.8375 190,769 Total $ 3.2450 $ 739,157

Partners' Capital

Partners' Capital	12 Months Ended
	Dec. 31, 2016
Stockholders' Equity Note [Abstract]
Partners' Capital	Partners’ Capital The following table details the changes in the number of our limited partner units outstanding from January 1, 2014 through December 31, 2016 : Limited partner units outstanding on January 1, 2014 226,679,438 02/2014—Settlement of 2011 awards 387,216 During 2014—Other (a) 1,603 Limited partner units outstanding on December 31, 2014 227,068,257 01/2015—Settlement of 2012 awards 354,529 During 2015—Other (a) 4,461 Limited partner units outstanding on December 31, 2015 227,427,247 02/2016—Settlement of 2013 awards 350,552 During 2016—Other (a) 6,117 Limited partner units outstanding on December 31, 2016 227,783,916 (a) Limited partner units issued to settle the equity-based retainer paid to independent directors of our general partner. Our partnership agreement allows us to issue additional partnership securities for any partnership purpose at any time and from time to time for consideration and on terms and conditions as our general partner determines, all without approval by the limited partners. Limited partners holding our limited partner units have the following rights, among others: • right to receive distributions of our available cash within 45 days after the end of each quarter; • right to elect the board members of our general partner; • right to remove Magellan GP, LLC as our general partner upon a 100% vote of outstanding unitholders; • right to transfer limited partner unit ownership to substitute limited partners; • right to receive an annual report, containing audited financial statements and a report on those financial statements by our independent public accountants, within 120 days after the close of the fiscal year end; • right to receive information reasonably required for tax reporting purposes within 90 days after the close of the calendar year; • right to vote according to the limited partners’ percentage interest in us at any meeting that may be called by our general partner; and • right to inspect our books and records at the unitholders’ own expense. In the event of liquidation, we would distribute all property and cash in excess of that required to discharge all liabilities to the partners in proportion to the positive balances in their respective capital accounts. The limited partners’ liability is generally limited to their investment.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Recognizable events No recognizable events have occurred subsequent to December 31, 2016 . Non-recognizable events On January 31, 2017, we issued 240,640 limited partner units, of which 216,679 were issued to settle unit awards to certain employees that vested on December 31, 2016 and 23,961 were issued to settle the equity-based retainers paid to certain independent directors of our general partner and the final payment of deferred director compensation to a former director. On February 2, 2017, 207,445 phantom unit awards were issued pursuant to our LTIP. These grants included both performance-based and time-based phantom unit awards and have a 3 -year vesting period that will end on December 31, 2019. On February 14, 2017, we paid cash distributions of $0.855 per unit on our outstanding limited partner units to unitholders of record at the close of business on February 3, 2017. The total distributions paid were $195.0 million .

Summary Of Significant Accoun30

Summary Of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation. Our consolidated financial statements include our refined products, crude oil and marine storage operating segments. We consolidate all entities in which we have a controlling ownership interest. We apply the equity method of accounting to investments in entities over which we exercise significant influence but do not control. We eliminate all intercompany transactions.
Use Of Estimates	Use of Estimates. The preparation of our consolidated financial statements in conformity with generally accepted accounting principles in the U.S. (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities that exist at the date of our consolidated financial statements, as well as their impact on the reported amounts of revenue and expense during the reporting periods. Actual results could differ from those estimates.
Cash Equivalents	Cash Equivalents. Cash and cash equivalents include demand and time deposits and funds that own highly marketable securities with original maturities of three months or less when acquired. We periodically assess the financial condition of the institutions where we hold these funds, and, at December 31, 2015 and 2016 , we believed our credit risk relative to these funds was minimal.
Accounts Receivable And Allowance For Doubtful Accounts	Accounts Receivable and Allowance for Doubtful Accounts. Accounts receivable represent valid claims against customers. We recognize accounts receivable when we sell products or render services and collection of the receivable is probable. We extend credit terms to certain customers based on historical dealings and to other customers after a review of various credit indicators. We establish an allowance for doubtful accounts for all or any portion of an account where we consider collections to be at risk and evaluate reserves no less than quarterly to determine their adequacy. Judgments relative to at-risk accounts include the customers’ current financial condition, the customers’ historical relationship with us and current and projected economic conditions. We write off accounts receivable when we deem an account uncollectible.
Inventory	Inventory. Inventory is comprised primarily of refined products, liquefied petroleum gases, transmix, crude oil and additives, which are stated and relieved at the lower of average cost or market.
Property, Plant and Equipment	Property, Plant and Equipment. Property, plant and equipment consist primarily of pipeline, pipeline-related equipment, storage tanks and processing equipment. We state property, plant and equipment at cost except for certain acquired assets recorded at fair value on their respective acquisition dates and impaired assets. We record impaired assets at fair value on the last impairment evaluation date for which an adjustment was required. We assign asset lives based on reasonable estimates when we place an asset into service. Subsequent events could cause us to change our estimates, which would affect the future calculation of depreciation expense. The range of depreciable lives by asset category is detailed in Note 8— Property, Plant and Equipment and Other Intangibles . When we sell or retire property, plant and equipment, we remove its carrying value and the related accumulated depreciation from our accounts and record any associated gains or losses on our consolidated statements of income in the period of sale or disposition. We capitalize expenditures to replace existing assets and retire the replaced assets. We capitalize expenditures when they extend the useful life, increase the productivity or capacity or improve the safety or efficiency of the asset. We capitalize direct project costs such as labor and materials as incurred. Indirect project costs, such as overhead, are capitalized based on a percentage of direct labor charged to the respective capital project. We charge expenditures for maintenance, repairs and minor replacements to operating expense in the period incurred.
Investments in Non-Controlled Entities	Investments in Non-Controlled Entities. We account for investments greater than 20% in affiliates that we do not control using the equity method of accounting. Under this method, an investment is recorded at our acquisition cost or capital contributions, as adjusted by contractual terms, plus equity in earnings or losses since acquisition or formation, plus interest capitalized, less distributions received and amortization of interest capitalized and excess net investment. Excess net investment is the amount by which our investment in a non-controlled entity exceeded our proportionate share of the book value of the net assets of that investment. We amortize excess net investment over the weighted-average depreciable asset lives of the equity investee. Our unamortized excess net investment was $76.7 million and $61.3 million at December 31, 2015 and 2016 , respectively. The amount of unamortized excess investment is primarily related to our investment in BridgeTex. We evaluate equity method investments for impairment whenever events or circumstances indicate that there is an other-than-temporary loss in value of the investment. In the event that we determine that the loss in value of an investment is other-than-temporary, we would record a charge to earnings to adjust the carrying value to fair value.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets. Goodwill resulting from a business combination is not subject to amortization. We test goodwill at the reporting unit level for impairment on an annual basis and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of the reporting unit below its carrying amount. We amortize other intangible assets with finite lives over their estimated useful lives of 6 years up to 30 years. The weighted-average asset life of our other intangible assets at December 31, 2016 was approximately 21 years. We adjust the useful lives of our other intangible assets if events or circumstances indicate there has been a change in the remaining useful lives. We eliminate from our balance sheets the gross carrying amount and the related accumulated amortization for any fully amortized intangibles in the year they are fully amortized. We review our other intangible assets for impairment whenever events or changes in circumstances indicate we should assess the recoverability of the carrying amount of the intangible asset.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets. We evaluate our long-lived assets of identifiable business activities, other than those held for sale, for impairment when events or changes in circumstances indicate, in management’s judgment, that the carrying value of such assets may not be recoverable. We base the determination of whether impairment has occurred on management’s estimate of undiscounted future cash flows attributable to the assets as compared to the carrying value of the assets. We calculate the amount of the impairment recognized as the excess of the carrying amount of the asset over the fair value of the assets, as determined either through reference to similar asset sales or by estimating the fair value using a discounted cash flow approach. Judgments and assumptions are inherent in management’s estimate of undiscounted future cash flows used to determine recoverability of an asset and the estimate of an asset’s fair value used to calculate the amount of impairment to recognize. The use of alternate judgments and assumptions could result in the recognition of different levels of impairment charges in the financial statements.
Interest Capitalized	Interest Capitalized. During construction, we capitalize interest on all construction projects requiring a completion period of three months or longer and total project costs exceeding $0.5 million . The interest we capitalize is based on the weighted-average interest rate of our debt.
Pension And Postretirement Medical And Life Benefit Obligations	Pension and Postretirement Medical and Life Benefit Obligations. We sponsor three pension plans that collectively cover substantially all of our employees, a postretirement medical and life benefit plan for certain employees and a defined contribution plan. Our pension and postretirement benefit liabilities represent the funded status of the present value of benefit obligations of these plans. We develop pension, postretirement medical and life benefits costs from actuarial valuations. We establish actuarial assumptions to anticipate future events and use those assumptions when calculating the expense and liabilities related to these plans. These factors include assumptions management makes concerning expected investment return on plan assets, discount rates, health care costs trend rates, turnover rates and rates of future compensation increases, among others. In addition, we use subjective factors such as withdrawal and mortality rates to develop actuarial valuations. Management reviews and updates these assumptions on an annual basis. The actuarial assumptions that we use may differ from actual results due to changing market rates or other factors. These differences could affect the amount of pension and postretirement medical and life benefit expense we will recognize in future periods.
Derivative Financial Instruments	Derivative Financial Instruments. We use derivative instruments to manage market price risks associated with inventories, interest rates, tank bottoms and certain forecasted transactions. Our policies prohibit us from engaging in speculative trading activities. For certain physical forward commodity derivative contracts, accounting guidance provides for and we apply the normal purchase / normal sale exception, whereby changes in the mark-to-market values of such contracts are not recognized in income, rather the revenues and expenses associated with such transactions are recognized during the period when commodities are physically delivered or received. Physical forward commodity contracts subject to this exception are evaluated for the probability of future delivery and are periodically back-tested once the forecasted period has passed to determine whether similar forward contracts are probable of physical delivery in the future. For all other derivative contracts, we record the agreements on our balance sheets at fair value. For those instruments that qualify for hedge accounting, the accounting treatment depends on their intended use and their designation. We divide derivative financial instruments qualifying for hedge accounting treatment into two categories: (1) cash flow hedges and (2) fair value hedges. We execute cash flow hedges to hedge against the variability in cash flows related to a forecasted transaction and execute fair value hedges to hedge against the changes in the value of a recognized asset or liability. At the inception of a hedged transaction, we document the relationship between the hedging instrument and the hedged item, the risk management objectives and the methods used for assessing and testing hedge effectiveness. We also assess, both at the inception of the hedge and on an on-going basis, whether the derivatives that are used in our hedging transactions are highly effective in offsetting changes in cash flows or fair value of the hedged item. If we determine that a derivative originally designated as a cash flow or fair value hedge is no longer highly effective, we discontinue hedge accounting prospectively and record the change in the fair value of the derivative in current earnings. The changes in fair value of derivative financial instruments that are not designated as hedges or that do not qualify for the normal purchase / normal sales exception are included in current earnings. As part of our risk management process, we assess the creditworthiness of the financial and other institutions with which we execute financial derivatives. Such financial instruments involve the risk of non-performance by the counterparty, which could result in material losses to us. We enter into commodity-based futures contracts traded on the New York Mercantile Exchange to hedge against price changes on a portion of the petroleum products we expect to sell or purchase in the future, as well as against changes in the fair value of certain tank bottoms. We record the effective portion of the gains or losses for those contracts that are designated as cash flow hedges in other comprehensive income and the ineffective portion in product sales revenue. We reclassify gains and losses from contracts designated as cash flow hedges from other comprehensive income to product sales revenue when the hedged transaction occurs and we terminate the derivative agreement. We record the effective portion of the gains or losses for those contracts designated as fair value hedges as adjustments to the assets being hedged and the ineffective portions as well as amounts excluded from the assessment of hedge effectiveness as adjustments to other income or expense. We recognize the change in fair value of hedges that are not designated as hedges in product sales revenue or cost of product sales, except for those contracts that hedge the inventories associated with our pipeline system overages, which are recorded in operating expenses. We use interest rate derivatives to help manage interest rate risk. We record any ineffectiveness on derivatives designated as hedging instruments to interest expense and the change in fair value of interest rate derivatives that we do not designate as hedging instruments to other income or expense in our results of operations. For the effective portion of interest rate cash flow hedges, we record the noncurrent portion of unrealized gains or losses as an adjustment to other comprehensive income with the current portion recorded as an adjustment to interest expense. For the effective portion of fair value hedges on long-term debt, we record the noncurrent portion of gains or losses as an adjustment to long-term debt with the current portion recorded as an adjustment to interest expense.
Revenue Recognition	Revenue Recognition. Sales revenue is recognized based on contracts or other persuasive evidence of an arrangement with the customer that includes fixed or determinable prices in which collectability is reasonably assured. Product sales revenue is recognized for products upon delivery and when the customer assumes the risks and rewards of ownership. We recognize pipeline transportation revenue for crude oil shipments when our customers take possession of their product from our system. For shipments of refined products and ammonia under published tariffs that combine transportation and terminalling services, we recognize revenue when our customers take possession of their product from our system. For shipments where terminalling services are not included in the tariff, we recognize revenue when our customers’ product arrives at the customer-designated destination. We have certain agreements that require counterparties to ship a minimum volume over an agreed-upon period. Revenue pursuant to such agreements is recognized at the earlier of when the volume is shipped or when the counterparty’s ability to meet the minimum volume commitment has expired. The tariffs we charge for our pipeline transportation systems are primarily regulated by the Federal Energy Regulatory Commission (“FERC”); however, certain tariffs are regulated by the Surface Transportation Board or state regulatory authorities. Our tariffs include provisions which allow us to deduct from our customer’s inventory a small percentage of the products our customers transport on our pipeline systems. We refer to these product quantities as tender deductions. We receive tender deductions from our customers as consideration for product losses during the transportation of their refined products or crude oil within our pipeline systems. Our customers are guaranteed delivery of the amount of their injected volumes, net of tender deductions, irrespective of what our actual product losses may be during the delivery process. Tender deduction revenue is recognized when the transportation barrels are received and is recorded at the fair value of the product received. We recognize injection service fees associated with additives upon injection to the customer’s product, which occurs at the time we deliver the product to our customers. We recognize tank storage, pipeline capacity leases, terminalling, throughput, ethanol loading and unloading services, laboratory testing, data services, pipeline operation fees and other miscellaneous service-related revenue upon completion of the rendered services. We recognize product sales upon delivery of the product to the customer. We record back-to-back purchases and sales of refined products where we are acting as an agent to facilitate refined product sales between a supplier and a customer on a net basis.
Deferred Transportation Revenues And Costs	Deferred Transportation Revenue and Costs. Generally, we invoice customers on our refined products pipeline for transportation services when their product enters our system. At each period end, we record all invoiced amounts associated with products that have not yet been delivered (in-transit products) as a deferred liability. The value of this liability is calculated as the total of the volume of each product type, for each pipeline region, multiplied by the average tariff rate for that product type for the most recent month invoiced to our customers. We use the most recent month’s average tariff rate because the product in our pipeline system generally turns over every month. Additionally, at each period end, we defer the direct costs we have incurred associated with these in-transit products, until delivery occurs, as a deferred asset. These direct costs are estimated based on our average per-barrel direct delivery cost for the current year multiplied by the total in-transit barrels in our system at the end of the period multiplied by 50% to reflect the average transportation costs incurred for all products across all our pipeline systems. We use 50% of the in-transit barrels because that best represents the average delivery point of all barrels in our pipeline system. These deferred revenues and costs are determined using judgments and assumptions that management considers reasonable.
Pipeline Over/Short Product	Pipeline Over/Short Product. Each period end we measure the volume of each type of product in our pipeline system, which is compare d to the volumes of our customers’ inventories (as adjusted for tender deductions). To the extent that the product volumes in our pipeline system exceed the volumes of our customers’ book inventories, we increase our product inventories and recognize a gain; however, to the extent the product in our pipeline system is less than our customers’ book inventories, we record a liability (for product owed to our customers) and recognize a loss. The product gains and losses we recognize are recorded based on period-end product market prices, and we include those gains or losses in operating expenses on our consolidated statements of income.
Excise Taxes Charged To Customers	Excise Taxes Charged to Customers . Revenues are recorded net of all amounts charged to our customers for excise taxes.
Equity-Based Incentive Compensation Awards	Equity-Based Incentive Compensation. The compensation committee of our general partner’s board of directors (the “compensation committee”) has approved incentive awards of phantom units representing limited partner interests in us to certain employees and to independent members of our general partner’s board of directors. The phantom unit awards granted include: (i) performance-based awards which are issued to certain officers, managers and other key employees (“performance-based awards”), (ii) time-based awards which are issued to certain officers, managers and key employees (“time-based awards”), and (iii) performance awards which are issued to independent members of our general partner’s board of directors (“director awards”). All of the performance-based and time-based awards, as well as director awards that have been deferred into the Director Deferred Compensation Plan, include distribution equivalent rights. We classify our performance-based and time-based unit awards as equity, and we classify the director awards as liability awards. Fair value for awards classified as equity is determined on the grant date of the award, and we recognize this value as compensation expense ratably over the requisite service period, which is the vesting period of each unit award. Because all of our outstanding unit awards contain distribution equivalent rights, the per-unit fair value of our equity awards is the closing price of our limited partner units on the grant date. However, the per-unit fair value of our performance-based unit awards also includes the fair value of the market-based component of those awards. Compensation expense for our equity awards is calculated as the number of unit awards less forfeitures, multiplied by the per unit grant date fair value of those awards, multiplied by the percentage of the requisite service period completed at each period end, multiplied by the expected payout percentage, less previously-recognized compensation expense. Compensation expense for our liability awards is calculated as the number of phantom units awarded, multiplied by the per unit fair value of those awards on the last day of the reporting period, less previously-recognized compensation expense. Our outstanding performance-based awards include provisions that can result in payouts to the recipients of these awards of 0% to 200% of the targeted amount of the award. Additionally, these performance-based awards are subject to a total unitholder return market performance adjustment, which could increase or decrease the payout of these awards by as much as 50% . The market performance adjustment component is based on our total unitholder return compared to the total unitholder returns of specified peer companies. Judgments and assumptions of the final award payouts are inherent in the accruals recorded for equity-based incentive compensation costs. The use of alternate judgments and assumptions could result in the recognition of different levels of equity-based incentive compensation costs. Payouts related to time-based awards are based solely on the completion of the requisite service period by the employee. Time-based awards contain no provisions which would provide for a payout to the employee of anything other than the original number of units awarded and the associated distribution equivalents. The vesting period for both the performance-based and time-based awards is generally three years; however, certain awards have been issued with shorter vesting periods while others have vesting periods of up to four years. We settle performance-based and time-based awards that have vested by issuing new limited partner units, except for the associated statutory tax withholding, which we settle by paying in cash. Director awards may be deferred and may be settled in cash or by issuing limited partner units. Director awards deferred prior to 2015 are paid in January of the year following the director’s resignation from the board of directors of our general partner or death. Director awards deferred after January 1, 2015 are paid 60 days following the director’s death or resignation from the board of directors of our general partner.
Contingencies And Environmental	Contingencies and Environmental. Certain conditions may exist as of the date our consolidated financial statements are issued that could result in a loss to us, but which will only be resolved when one or more future events occur or fail to occur. Our management assesses such contingent liabilities, which inherently involves significant judgment. In assessing loss contingencies related to legal proceedings that are pending against us or for unasserted claims that may result in proceedings, our management, with input from legal counsel, evaluates the perceived merits of any legal proceedings or unasserted claims as well as the perceived merits of the amount of relief sought or expected to be sought therein. Environmental expenditures are charged to operating expense or capitalized based on the nature of the expenditures. Environmental expenditures that meet the capitalization criteria for property, plant and equipment, as well as costs that mitigate or prevent environmental contamination that has yet to occur, are capitalized. We expense expenditures that relate to an existing condition caused by past operations. We initially record environmental liabilities assumed in a business combination at fair value; otherwise, we record environmental liabilities on an undiscounted basis. We recognize liabilities for other commitments and contingencies when, after analyzing the available information, we determine it is probable that an asset has been impaired, or that a liability has been incurred and the amount of impairment or loss can be reasonably estimated. When we can estimate a range of probable loss, we accrue the most likely amount within that range, or if no amount is more likely than another, we accrue the minimum of the range of probable loss. We expense legal costs associated with loss contingencies as incurred. We record environmental liabilities independently of any potential claim for recovery. Accruals related to environmental matters are generally determined based on site-specific plans for remediation, taking into account currently available facts, existing technologies and presently enacted laws and regulations. Accruals for environmental matters reflect our prior remediation experience and include an estimate for costs such as fees paid to contractors, outside engineering and consulting firms. Accruals for estimated losses from environmental remediation obligations generally are recognized no later than completion of the remediation feasibility study. Such accruals are adjusted as further information develops or circumstances change. We maintain specific insurance coverage, which may cover all or portions of certain environmental expenditures less a deductible. We recognize receivables in cases where we consider the realization of reimbursements of remediation costs as probable. We would sustain losses to the extent of amounts we have recognized as environmental receivables if the counterparties to those transactions were unable to perform their obligations to us. The determination of the accrual amounts recorded for environmental liabilities includes significant judgments and assumptions made by management. The use of alternate judgments and assumptions could result in the recognition of different levels of environmental remediation costs.
Income Taxes	Income Taxes. We are a partnership for income tax purposes and, therefore, have not been subject to federal or state income taxes for most of the states in which we operate. The tax on our net income is borne by the individual partners through the allocation of taxable income. Net income for financial statement purposes may differ significantly from taxable income of unitholders because of differences between the tax basis and financial reporting basis of assets and liabilities and the taxable income allocation requirements under our partnership agreement. The aggregate difference in the basis of our net assets for financial and tax reporting purposes cannot be readily determined because information regarding each partner’s tax attributes is not available to us. As a publicly traded limited partnership, we are subject to a statutory requirement that our “qualifying income” (as defined by the Internal Revenue Code, related Treasury Regulations and Internal Revenue Service pronouncements) exceed 90% of our total gross income, determined on a calendar year basis. If our qualifying income does not meet this statutory requirement, we could be taxed as a corporation for federal and state income tax purposes. For the years ended December 31, 2014 , 2015 and 2016 , our qualifying income met the statutory requirement. The amounts recognized as provision for income taxes in our consolidated statements of income are primarily comprised of partnership-level taxes levied by the state of Texas. This tax is based on revenues less direct costs of sale for our assets apportioned to the state of Texas.
Net Income Per Unit	Net Income Per Unit. We calculate basic net income per limited partner unit for each period by dividing net income by the weighted-average number of limited partner units outstanding. The difference between our actual limited partner units outstanding and our weighted-average number of limited partner units outstanding used to calculate net income per limited partner unit is due to the impact of: (i) the phantom units issued to independent directors which is included in the calculation of basic and diluted weighted average units outstanding, and (ii) the weighted average effect of units actually issued during a period. The difference between the weighted-average number of limited partner units outstanding used for basic and diluted net income per unit calculations on our consolidated statements of income is primarily the dilutive effect of phantom unit grants associated with our long-term incentive plan which have not yet vested in periods where contingent performance metrics have been met.
New Accounting Pronouncements	New Accounting Pronouncements In March 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting , which is part of the FASB’s initiative to simplify accounting standards. The guidance requires an entity to make an entity-wide accounting policy election to either estimate the number of awards that are expected to vest or account for forfeitures when they occur, and allows equity classification for awards where employees elect to withhold up to the maximum statutory tax rates in the applicable jurisdictions. The new standard also requires cash paid by employers when directly withholding shares for tax withholding purposes to be classified as a financing activity in the statement of cash flows. We elected to early adopt ASU 2016-09 during the first quarter of 2016, and this adoption did not have a material impact on our consolidated financial statements. In conjunction with our adoption of this new accounting standard, we elected to account for equity-based compensation forfeitures as they occur. Additionally, and consistent with our prior accounting policy, we continue to show cash paid when directly withholding shares for tax withholding purposes as a financing activity in our statements of cash flows. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842). This ASU requires lessees to recognize a right of use asset and lease liability on the balance sheet for all leases, with the exception of short-term leases. The new accounting model for lessors remains largely the same, although some changes have been made to align it with the new lessee model and the new revenue recognition guidance. This update also requires companies to include additional disclosures regarding their lessee and lessor agreements. Public companies are required to adopt the standard for financial reporting periods that start after December 15, 2018, although early adoption is permitted. We are currently in the process of evaluating the impact this new standard will have on our financial statements. In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers. This ASU amends the existing accounting standards for revenue recognition and is based on the principle that revenue should be recognized to depict the transfer of goods or services to a customer at an amount that reflects the consideration a company expects to receive in exchange for those goods or services. We will adopt this ASU as required on January 1, 2018, using the full retrospective method of adoption. We do not expect the adoption of this ASU to have a material impact on our consolidated financial statements.

Consolidated Statements Of Ca31

Consolidated Statements Of Cash Flows - Supplemental Disclosures (Tables)	12 Months Ended
	Dec. 31, 2016
Supplemental Cash Flow Information [Abstract]
Consolidated Statement Of Cash Flows	Changes in the components of operating assets and liabilities are as follows (in thousands): Year Ended December 31, 2014 2015 2016 Trade accounts receivable and other accounts receivable $ 49,215 $ 3,664 $ (31,107 ) Inventory 29,462 26,894 (3,510 ) Energy commodity derivatives contracts, net of derivatives deposits (7,583 ) (606 ) (692 ) Accounts payable (10,918 ) 4,107 (4,423 ) Accrued payroll and benefits 6,055 3,466 (6,074 ) Accrued interest payable 1,038 5,323 14,347 Accrued taxes other than income 9,094 3,699 (1,421 ) Deferred revenue 7,978 10,485 20,264 Accrued product purchases (18,678 ) (13,016 ) 20,261 Current and noncurrent environmental liabilities (2,144 ) (4,904 ) (7,398 ) Other current and noncurrent assets and liabilities 22,208 9,250 (21,762 ) Total $ 85,727 $ 48,362 $ (21,515 )

Investments in Non-Controlled32

Investments in Non-Controlled Entities (Tables)	12 Months Ended
	Dec. 31, 2016
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Our investments in non-controlled entities at December 31, 2016 were comprised of: Entity Ownership Interest BridgeTex Pipeline Company, LLC (“BridgeTex”) 50% Double Eagle Pipeline LLC (“Double Eagle”) 50% HoustonLink Pipeline Company, LLC (“HoustonLink”) 50% Powder Springs Logistics, LLC (“Powder Springs”) 50% Saddlehorn Pipeline Company, LLC (“Saddlehorn”) 40% Seabrook Logistics, LLC (“Seabrook”) 50% Texas Frontera, LLC (“Texas Frontera”) 50% In February 2016, we transferred our 50% membership interest in Osage Pipe Line Company, LLC (“Osage”) to an affiliate of HollyFrontier Corporation. In conjunction with this transaction, we entered into several commercial agreements with affiliates of HollyFrontier Corporation. We recorded these commercial agreements as $43.7 million of intangible assets and $8.3 million of other receivables in our consolidated balance sheets. The intangible assets will be amortized over the 20 -year life of the contracts received. The total gain recorded in 2016 was $28.1 million . The management fees we have recognized from BridgeTex, Osage, Powder Springs, Saddlehorn and Texas Frontera are reported as affiliate management fee revenue on our consolidated statements of income. In addition, we receive reimbursement from certain of our joint ventures for costs incurred during construction and operations, which we have included as reductions to costs and expenses on our consolidated statements of income. These cost reimbursements totaled $1.3 million and $4.2 million for the year ended December 31, 2015 and 2016 , respectively. For the year ended December 31, 2015 and 2016 , we recognized pipeline capacity lease revenue from BridgeTex of $34.6 million and $35.5 million , respectively, which we included in transportation and terminals revenue on our consolidated statements of income. We recognized throughput revenue from Double Eagle for the year ended December 31, 2015 and 2016 of $3.4 million and $3.3 million , respectively, which we included in transportation and terminals revenue on our consolidated statements of income. At December 31, 2015 and 2016 , we recognized $0.2 million and $0.3 million , respectively, of trade accounts receivable from Double Eagle. We recognized storage revenue of $0.7 million from Saddlehorn for the year ended December 31, 2016 , which we included in transportation and terminals revenue on our consolidated statements of income. At December 31, 2016 , we recognized a $0.1 million other accounts receivable from Saddlehorn related to miscellaneous cost reimbursements. The financial results from Texas Frontera are included in our marine storage segment, the financial results from BridgeTex, Double Eagle, HoustonLink, Osage, Saddlehorn and Seabrook are included in our crude oil segment and the financial results from Powder Springs are included in our refined products segment, each as earnings/losses of non-controlled entities. A summary of our investments in non-controlled entities (representing only our proportionate interests) follows (in thousands): Investments at December 31, 2015 $ 765,628 Additional investment 200,023 Exchange of investment in non-controlled entity (25,105 ) Earnings of non-controlled entities: Proportionate share of earnings 80,974 Amortization of excess investment and capitalized interest (2,278 ) Earnings of non-controlled entities 78,696 Less: Distributions of earnings from investments in non-controlled entities 78,723 Distributions in excess of earnings of non-controlled entities 9,264 Investments at December 31, 2016 $ 931,255 Summarized financial information of our non-controlled entities (representing 100% of the interests in these entities) follows (in thousands): December 31, 2015 2016 Current assets $ 158,128 $ 208,901 Noncurrent assets 1,383,394 1,714,920 Total assets $ 1,541,522 $ 1,923,821 Current liabilities $ 149,231 $ 111,164 Noncurrent liabilities 7,719 27,022 Total liabilities $ 156,950 $ 138,186 Equity $ 1,384,572 $ 1,785,635 Year Ended December 31, 2014 2015 2016 Revenue $ 84,056 $ 246,841 $ 279,180 Net income $ 41,279 $ 138,457 $ 164,684

Inventory (Tables)

Inventory (Tables)	12 Months Ended
	Dec. 31, 2016
Inventory Disclosure [Abstract]
Inventory	Inventory at December 31, 2015 and 2016 was as follows (in thousands): December 31, 2015 2016 Refined products $ 57,455 $ 54,285 Liquefied petroleum gases 17,954 24,868 Transmix 21,297 28,319 Crude oil 28,385 20,839 Additives 5,777 6,067 Total inventory $ 130,868 $ 134,378

Product Sales Revenue (Tables)

Product Sales Revenue (Tables)	12 Months Ended
	Dec. 31, 2016
Product Sales Revenue [Abstract]
Disclosure Of Product Sales Revenue	For the years ended December 31, 2014 , 2015 and 2016 , product sales revenue included the following (in thousands): Year Ended December 31, 2014 2015 2016 Physical sale of petroleum products $ 733,654 $ 561,410 $ 638,186 Change in value of futures contracts 145,320 68,426 (38,584 ) Total product sales revenue $ 878,974 $ 629,836 $ 599,602

Property, Plant and Equipment35

Property, Plant and Equipment and Other Intangibles (Tables)	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, plant and equipment consisted of the following (in thousands): Estimated Depreciable Lives December 31, 2015 2016 Construction work-in-progress $ 476,662 $ 500,208 Land and rights-of-way 275,277 339,561 Buildings 88,641 101,065 10 to 56 years Storage tanks 1,684,430 1,829,223 10 to 40 years Pipeline and station equipment 2,249,067 2,457,429 10 to 69 years Processing equipment 1,217,492 1,350,032 3 to 56 years Other 175,197 206,219 3 to 48 years Property, Plant and Equipment, Gross $ 6,166,766 $ 6,783,737

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Changes In Benefit Obligations And Plan Assets	The following table presents the changes in benefit obligations and plan assets for pension benefits and other postretirement benefits for the years ended December 31, 2015 and 2016 (in thousands): Pension Benefits Other Postretirement Benefits 2015 2016 2015 2016 Change in benefit obligation: Benefit obligation at beginning of year $ 190,663 $ 209,591 $ 12,446 $ 11,314 Service cost 18,890 18,179 243 235 Interest cost 7,754 7,950 438 489 Plan participants’ contributions — — 199 217 Plan amendment (3,610 ) — — — Actuarial loss (gain) 574 1,050 (579 ) 1,481 Benefits paid (4,680 ) (10,053 ) (1,433 ) (725 ) Settlement payments — (747 ) — — Benefit obligation at end of year 209,591 225,970 11,314 13,011 Change in plan assets: Fair value of plan assets at beginning of year 127,267 142,742 — — Employer contributions 20,482 25,972 1,234 508 Plan participants’ contributions — — 199 217 Actual return on plan assets (327 ) 8,992 — — Benefits paid (4,680 ) (10,053 ) (1,433 ) (725 ) Settlement payments — (747 ) — — Fair value of plan assets at end of year 142,742 166,906 — — Funded status at end of year $ (66,849 ) $ (59,064 ) $ (11,314 ) $ (13,011 ) Accumulated benefit obligation $ 148,906 $ 160,642
Amounts Recognized In Consolidated Balance Sheets	Amounts recognized in the consolidated balance sheets included in these financial statements were as follows (in thousands): Pension Benefits Other Postretirement Benefits 2015 2016 2015 2016 Amounts recognized in consolidated balance sheets: Current accrued benefit cost $ — $ — $ 612 $ 614 Long-term pension and benefits 66,849 59,064 10,702 12,397 66,849 59,064 11,314 13,011 Accumulated other comprehensive loss: Net actuarial loss (65,889 ) (62,013 ) (7,280 ) (7,881 ) Prior service credit 3,610 3,429 3,335 — (62,279 ) (58,584 ) (3,945 ) (7,881 ) Net amount of liabilities and accumulated other comprehensive loss recognized in consolidated balance sheets $ 4,570 $ 480 $ 7,369 $ 5,130
Consolidated Net Periodic Benefit Costs	Net periodic benefit expense for the years ended December 31, 2014 , 2015 and 2016 were as follows (in thousands): Pension Benefits Other Postretirement Benefits 2014 2015 2016 2014 2015 2016 Components of net periodic pension and postretirement benefit expense: Service cost $ 13,400 $ 18,890 $ 18,179 $ 227 $ 243 $ 235 Interest cost 6,675 7,754 7,950 506 438 489 Expected return on plan assets (6,363 ) (8,037 ) (8,913 ) — — — Amortization of prior service cost (credit) 33 — (181 ) (3,713 ) (3,713 ) (3,335 ) Amortization of actuarial loss 3,071 6,306 4,645 915 885 880 Settlement cost 1,809 — 202 — — — Net periodic expense (credit) $ 18,625 $ 24,913 $ 21,882 $ (2,065 ) $ (2,147 ) $ (1,731 )
Other Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Loss	Other changes in plan assets and benefit obligations recognized in other comprehensive loss during 2014 , 2015 and 2016 were as follows (in thousands): Pension Benefits Other Postretirement Benefits 2014 2015 2016 2014 2015 2016 Beginning balance $ (36,184 ) $ (63,257 ) $ (62,279 ) $ 3,053 $ (1,696 ) $ (3,945 ) Net actuarial gain (loss) (31,986 ) (8,938 ) (971 ) (1,951 ) 579 (1,481 ) Plan amendment — 3,610 — — — — Amortization of prior service cost (credit) 33 — (181 ) (3,713 ) (3,713 ) (3,335 ) Amortization of actuarial loss 3,071 6,306 4,645 915 885 880 Settlement cost 1,809 — 202 — — — Amount recognized in other comprehensive loss (27,073 ) 978 3,695 (4,749 ) (2,249 ) (3,936 ) Ending balance $ (63,257 ) $ (62,279 ) $ (58,584 ) $ (1,696 ) $ (3,945 ) $ (7,881 )
Weighted-Average Rate Assumptions Used For Benefit Obligations	The weighted-average rate assumptions used to determine benefit obligations as of December 31, 2015 and 2016 were as follows: Pension Benefits Other Postretirement Benefits 2015 2016 2015 2016 Discount rate—Salaried plan (1) 3.95% 4.21% n/a n/a Discount rate—USW plan 3.82% 4.08% n/a n/a Discount rate—IUOE plan 4.03% 4.41% n/a n/a Discount rate—Other Postretirement Benefits n/a n/a 4.00% 3.85% Rate of compensation increase—Salaried plan (2) 4% - 11% 4% - 11% n/a n/a Rate of compensation increase—USW plan 3.50% 3.50% n/a n/a Rate of compensation increase—IUOE plan 5.00% 5.00% n/a n/a (1) The weighted-average discount rate excludes benefit obligations for which present value calculations are not applicable. (2) The rate of compensation increase assumption for the Salaried plan is calculated by 10-year age groupings beginning with ages 20-29 at 11% dropping to 4% by ages 70 and above. The weighted-average rate assumptions used to determine net pension and other postretirement benefit expense for the years ended December 31, 2014 , 2015 and 2016 were as follows: Pension Benefits Other Postretirement Benefits 2014 2015 2016 2014 2015 2016 Discount rate—Salaried plan 4.89% 3.91% 3.95% n/a n/a n/a Discount rate—USW plan 4.07% 3.56% 3.82% n/a n/a n/a Discount rate—IUOE plan 4.89% 3.93% 3.78% n/a n/a n/a Discount rate—Other Postretirement Benefits n/a n/a n/a 4.52% 3.66% 4.00% Rate of compensation increase—Salaried plan (1) 5.00% 5.50% 4% - 11% n/a n/a n/a Rate of compensation increase—USW plan 3.50% 3.50% 3.50% n/a n/a n/a Rate of compensation increase—IUOE plan 5.00% 5.00% 5.00% n/a n/a n/a Expected rate of return on plan assets—Salaried plan 6.00% 6.00% 6.00% n/a n/a n/a Expected rate of return on plan assets—USW plan 6.00% 6.00% 6.00% n/a n/a n/a Expected rate of return on plan assets—IUOE plan 6.00% 6.00% 6.00% n/a n/a n/a (1) The rate of compensation increase assumption for the Salaried plan in 2016 is calculated by 10-year age groupings beginning with ages 20-29 at 11% dropping to 4% by ages 70 and above.
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	The fair values of the pension plan assets at December 31, 2015 were as follows (in thousands): Asset Category Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Domestic Equity Securities (a) : Small-cap fund $ 3,492 $ 3,492 $ — $ — Mid-cap fund 3,495 3,495 — — Large-cap fund 26,304 26,304 — — International equity fund 16,530 16,530 — — Fixed Income Securities (a) : Short-term bond funds 3,834 3,834 — — Intermediate-term bond funds 18,141 18,141 — — Long-term investment grade bond funds 66,758 66,758 — — Other: Short-term investment funds 3,944 3,944 — — Group annuity contract 244 — — 244 Fair value of plan assets $ 142,742 $ 142,498 $ — $ 244 (a) We hold equity and fixed income securities through investments in mutual funds, which are dedicated to each category as indicated. The fair values of the pension plan assets at December 31, 2016 were as follows (in thousands): Asset Category Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Domestic Equity Securities (a) : Small-cap fund $ 3,465 $ 3,465 $ — $ — Mid-cap fund 3,472 3,472 — — Large-cap funds 26,323 26,323 — — International equity fund 16,797 16,797 — — Fixed Income Securities (a) : Short-term bond funds 4,414 4,414 — — Intermediate-term bond funds 23,629 23,629 — — Long-term investment grade bond funds 83,240 83,240 — — Other: Short-term investment fund 5,346 5,346 — — Group annuity contract 220 — — 220 Fair value of plan assets $ 166,906 $ 166,686 $ — $ 220 (a) We hold equity and fixed income securities through investments in mutual funds, which are dedicated to each category as indicated.
Schedule of Allocation of Plan Assets	The target allocation and actual weighted-average asset allocation percentages at December 31, 2015 and 2016 were as follows: 2015 2016 Actual Target Actual Target Equity securities 35% 30% 30% 30% Fixed income securities 62% 67% 67% 67% Other 3% 3% 3% 3%
Expected Benefit Payments	As of December 31, 2016 , the benefit amounts expected to be paid from plan assets through December 31, 2026 were as follows (in thousands): Pension Benefits Other Postretirement Benefits 2017 $ 13,783 $ 614 2018 $ 14,016 $ 685 2019 $ 13,245 $ 778 2020 $ 16,435 $ 857 2021 $ 14,438 $ 933 2022 through 2026 $ 72,826 $ 4,702

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Consolidated Debt	Debt Long-term debt at December 31, 2015 and 2016 was as follows (in thousands): December 31, 2015 2016 Commercial paper $ 280,000 $ 50,000 5.65% Notes due 2016 250,000 — 6.40% Notes due 2018 250,000 250,000 6.55% Notes due 2019 550,000 550,000 4.25% Notes due 2021 550,000 550,000 3.20% Notes due 2025 250,000 250,000 5.00% Notes due 2026 — 650,000 6.40% Notes due 2037 250,000 250,000 4.20% Notes due 2042 250,000 250,000 5.15% Notes due 2043 550,000 550,000 4.20% Notes due 2045 250,000 250,000 4.25% Notes due 2046 — 500,000 Face value of long-term debt 3,430,000 4,100,000 Unamortized debt issuance costs (1) (18,672 ) (26,948 ) Net unamortized debt premium (1) 16,459 6,530 Net unamortized amount of gains from historical fair value hedges (1) 11,835 7,610 Long-term debt, net, including current portion 3,439,622 4,087,192 Less: current portion of long-term debt, net 250,335 — Long-term debt, net $ 3,189,287 $ 4,087,192 (1) Debt issuance costs, note discounts and premiums, and realized gains and losses of historical fair value hedges are being amortized or accreted to the applicable notes over the respective lives of those notes.

Derivative Financial Instrume38

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule Of NYMEX Contracts And Butane Price Swap Purchase Agreements [Table Text Block]	As outlined in the table below, our open futures contracts at December 31, 2016 were as follows: Type of Contract/Accounting Methodology Product Represented by the Contract and Associated Barrels Maturity Dates Futures - Fair Value Hedges 0.7 million barrels of crude oil November 2017 Futures - Economic Hedges 3.9 million barrels of refined products and crude oil Between January and April 2017 Futures - Economic Hedges 0.7 million barrels of butane Between January and April 2017
Derivatives and Offset Amounts [Table Text Block]	December 31, 2015 and 2016 (in thousands): December 31, 2015 Description Gross Amounts of Recognized Assets Gross Amounts of Liabilities Offset in the Consolidated Balance Sheets Net Amounts of Assets Presented in the Consolidated Balance Sheets (1) Margin Deposit Amounts Not Offset in the Consolidated Balance Sheets Net Asset Amount (2) Energy commodity derivatives $ 48,367 $ (5,646 ) $ 42,721 $ (24,252 ) $ 18,469 December 31, 2016 Description Gross Amounts of Recognized Liabilities Gross Amounts of Assets Offset in the Consolidated Balance Sheets Net Amounts of Liabilities Presented in the Consolidated Balance Sheets Margin Deposit Amounts Not Offset in the Consolidated Balance Sheets Net Asset Amount (2) Energy commodity derivatives $ (36,798 ) $ 6,060 $ (30,738 ) $ 49,899 $ 19,161 (1) Net amount includes energy commodity derivative contracts classified as current assets, net of $39,243 and noncurrent assets of $3,478 . (2) This represents the maximum amount of loss we would incur if our counterparties failed to perform on their derivative contracts.
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]	The changes in derivative activity included in AOCL for the years ended December 31, 2014 , 2015 and 2016 were as follows (in thousands): Year Ended December 31, Derivative Gains (Losses) Included in AOCL 2014 2015 2016 Beginning balance $ 13,627 $ (16,587 ) $ (30,126 ) Net loss on interest rate contract cash flow hedges (30,090 ) (14,904 ) (6,699 ) Reclassification of net loss (gain) on cash flow hedges to income (124 ) 1,365 2,049 Ending balance $ (16,587 ) $ (30,126 ) $ (34,776 )
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following is a summary of the effect on our consolidated statements of income for the years ended December 31, 2014 , 2015 and 2016 of derivatives accounted for under ASC 815-30, Derivatives and Hedging—Cash Flow Hedges , that were designated as hedging instruments (in thousands). Year Ended December 31, 2014 Derivative Instrument Amount of Loss Recognized in AOCL on Derivative Location of Gain (Loss) Reclassified from AOCL into Income Amount of Gain (Loss) Reclassified from AOCL into Income Effective Portion Ineffective Portion Interest rate contracts $ (30,090 ) Interest expense $ (242 ) $ 366 Year Ended December 31, 2015 Derivative Instrument Amount of Loss Recognized in AOCL on Derivative Location of Loss Reclassified from AOCL into Income Amount of Loss Reclassified from AOCL into Income Effective Portion Ineffective Portion Interest rate contracts $ (14,904 ) Interest expense $ (1,365 ) $ — Year Ended December 31, 2016 Derivative Instrument Amount of Loss Recognized in AOCL on Derivative Location of Loss Reclassified from AOCL into Income Amount of Loss Reclassified from AOCL into Income Effective Portion Ineffective Portion Interest rate contracts $ (6,699 ) Interest expense $ (2,049 ) $ —
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]	The gains (losses) on these futures contracts and the underlying tank bottoms were as follows (in millions): Year Ended December 31, 2014 2015 2016 Gain (loss) recognized in other income/expense on derivative (futures contracts) $ 13.5 $ 15.6 $ (9.0 ) Gain (loss) recognized in other income/expense on hedged item (tank bottoms) $ (13.5 ) $ (15.6 ) $ 9.0
Schedule of Derivatives and Hedging-Overall-Subsequent Measurement [Table Text block]	The following table provides a summary of the effect on our consolidated statements of income for the years ended December 31, 2014 , 2015 and 2016 of derivatives accounted for under ASC 815, Derivatives and Hedging , that were not designated as hedging instruments (in thousands): Amount of Gain (Loss) Year Ended December 31, Derivative Instrument Location of Gain (Loss) Recognized on Derivative 2014 2015 2016 Futures contracts Product sales revenue $ 145,320 $ 68,426 $ (38,584 ) Futures contracts Operating expenses 17,818 11,819 (5,000 ) Futures contracts Cost of product sales (17,141 ) (8,997 ) 10,998 Total $ 145,997 $ 71,248 $ (32,586 )
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]	The following tables provide a summary of the fair value of derivatives accounted for under ASC 815, Derivatives and Hedging , which are presented on a net basis in our consolidated balance sheets, that were designated as hedging instruments as of December 31, 2015 and 2016 (in thousands): December 31, 2015 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ 60 Energy commodity derivatives contracts, net $ — Futures contracts Other noncurrent assets 3,478 Other noncurrent liabilities — Interest rate contracts Other current assets 2,179 Other current liabilities 653 Total $ 5,717 Total $ 653 December 31, 2016 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ — Energy commodity derivatives contracts, net $ 3,079 Interest rate contracts Other noncurrent assets 14,114 Other noncurrent liabilities — Total $ 14,114 Total $ 3,079 The following tables provide a summary of the fair value of derivatives accounted for under ASC 815, Derivatives and Hedging , which are presented on a net basis in our consolidated balance sheets, that were not designated as hedging instruments as of December 31, 2015 and 2016 (in thousands): December 31, 2015 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ 44,829 Energy commodity derivatives contracts, net $ 5,646 December 31, 2016 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ 6,060 Energy commodity derivatives contracts, net $ 33,719

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2016
Leases [Abstract]
Lessee, Future Minimum Rental Payments	Future minimum annual rentals under non-cancellable operating leases with initial or remaining terms greater than one year as of December 31, 2016 , were as follows (in millions): 2017 $ 38.6 2018 32.9 2019 21.1 2020 17.8 2021 17.4 Thereafter 110.6 Total $ 238.4
Lessor, Future Minimum Payments Receivable	Future minimum payments receivable under these arrangements as of December 31, 2016 , were as follows (in millions): 2017 $ 227.6 2018 208.7 2019 158.8 2020 109.6 2021 77.0 Thereafter 188.5 Total $ 970.2
Leases, Investment in Direct Financing Lease	The net investment under direct financing leasing arrangements as of December 31, 2015 and 2016 was as follows (in millions): December 31, 2015 December 31, 2016 Total minimum lease payments receivable $ 30.7 $ 23.3 Less: Unearned income 5.8 4.8 Recorded net investment in direct financing lease $ 24.9 $ 18.5 The net investment in direct financing leases was classified in the consolidated balance sheets as follows (in millions): December 31, 2015 December 31, 2016 Other accounts receivable $ 6.4 $ 3.4 Long-term receivables 18.5 15.1 Total $ 24.9 $ 18.5 Future minimum payments receivable under this direct financing lease for the next five years are: 2017 – $4.1 million ; 2018 – $1.7 million ; 2019 – $1.7 million ; 2020 – $1.7 million ; and 2021 – $1.7 million .

Long-Term Incentive Plan (Table

Long-Term Incentive Plan (Tables)	12 Months Ended
	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Changes In Non-Vested Unit Awards	The amounts below do not include adjustments for above-target or below-target performance. Performance-Based Awards Time-Based Awards Total Awards Number of Unit Awards Weighted-Average Fair Value Number of Unit Awards Weighted-Average Fair Value Number of Unit Awards Weighted-Average Fair Value Non-vested units - 1/1/2016 313,240 $ 79.64 57,682 $ 81.74 370,922 $ 79.97 Units granted during 2016 193,344 $ 70.29 39,301 $ 64.76 232,645 $ 69.35 Units vested during 2016 (163,632 ) $ 72.32 (9,511 ) $ 71.40 (173,143 ) $ 72.27 Units forfeited during 2016 (29,256 ) $ 76.08 (5,054 ) $ 73.20 (34,310 ) $ 75.66 Non-vested units - 12/31/16 313,696 $ 78.03 82,418 $ 75.36 396,114 $ 77.47
Total Non-Vested Unit Awards	The table below summarizes the total non-vested unit awards outstanding adjusted for estimated amounts of above-target financial performance to determine the total number of unit awards included in our total equity-based liability accrual. Grant Date Non-Vested Unit Awards Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results Total Unit Award Accrual Vesting Date Unrecognized Compensation Expense (a) (in millions) Performance-Based Awards: 2015 Awards 131,335 32,834 164,169 12/31/2017 $ 4.8 2016 Awards 182,361 — 182,361 12/31/2018 8.5 Time-Based Awards: 2017 Vesting Date 50,488 — 50,488 12/31/2017 1.5 2018 Vesting Date 30,456 — 30,456 12/31/2018 1.3 2020 Vesting Date 1,474 — 1,474 12/31/2020 0.1 Total 396,114 32,834 428,948 $ 16.2 (a) Unrecognized compensation expense will be recognized over the remaining vesting period of the awards.
Weighted-Average Grant Date Fair Values	The weighted-average fair value of awards granted issued during 2014 , 2015 and 2016 were as follows: Performance-Based Awards Time-Based Awards Number of Unit Awards Weighted-Average Fair Value Number of Unit Awards Weighted-Average Fair Value Units granted during 2014 187,371 $ 72.77 33,903 $ 82.86 Units granted during 2015 148,028 $ 88.78 26,421 $ 81.51 Units granted during 2016 193,344 $ 70.29 39,301 $ 64.76
Vested Unit Awards	The table below sets forth the numbers and values of units that vested in each of the three years ended December 31, 2016 . The vested limited partner units include adjustments for above-target financial and market performance. Vesting Date Vested Limited Partner Units Fair Value of Unit Awards on Vesting Date (in millions) Intrinsic Value of Unit Awards on Vesting Date (in millions) 12/31/2014 528,984 $22.4 $43.7 12/31/2015 506,393 $27.7 $34.4 12/31/2016 361,711 $22.6 $27.4
Cash Flow Effects Of Long Term Incentive Plan Settlements [Table Text Block]	We settle awards that vest by issuing limited partner units. The difference between the limited partner units issued to the participants and the total units accrued represents the minimum tax withholdings associated with the award settlement, which we pay in cash. Settlement Date Number of Limited Partner Units Issued, Net of Tax Withholdings Minimum Tax Withholdings (in millions) Employer Taxes (in millions) Total Cash Taxes Paid (in millions) January 2014 387,216 $14.8 $1.2 $16.0 January 2015 354,529 $17.8 $1.7 $19.5 February 2016 350,552 $14.4 $1.4 $15.8
Equity-Based Incentive Compensation Expense	Equity-based incentive compensation expense for 2014 , 2015 and 2016 was as follows (in thousands): Year Ended December 31, 2014 2015 2016 2012 awards $ 8,314 $ — $ — 2013 awards 10,852 10,658 — 2014 awards 6,494 7,471 7,928 2015 awards — 4,917 4,874 2016 awards — — 4,304 Time-based awards 1,624 1,199 2,252 Total $ 27,284 $ 24,245 $ 19,358 Allocation of LTIP expense on our consolidated statements of income: G&A expense $ 26,700 $ 23,937 $ 19,204 Operating expense 584 308 154 Total $ 27,284 $ 24,245 $ 19,358

Segment Disclosures (Tables)

Segment Disclosures (Tables)	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Segment Reporting Information By Segment	Year Ended December 31, 2014 (in thousands) Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 946,612 $ 341,915 $ 170,740 $ — $ 1,459,267 Product sales revenue 872,537 — 6,437 — 878,974 Affiliate management fee revenue — 20,790 1,321 — 22,111 Total revenue 1,819,149 362,705 178,498 — 2,360,352 Operating expenses 356,057 83,184 65,173 (3,513 ) 500,901 Cost of product sales 592,887 — 1,698 — 594,585 (Earnings) loss of non-controlled entities — (16,309 ) (3,085 ) — (19,394 ) Operating margin 870,205 295,830 114,712 3,513 1,284,260 Depreciation and amortization expense 101,642 27,800 28,786 3,513 161,741 G&A expenses 96,411 29,557 22,320 — 148,288 Operating profit $ 672,152 $ 238,473 $ 63,606 $ — $ 974,231 Additions to long-lived assets $ 163,753 $ 439,846 $ 18,413 $ 622,012 As of December 31, 2014 Segment assets $ 2,875,412 $ 1,937,242 $ 647,900 $ 5,460,554 Corporate assets 40,855 Total assets $ 5,501,409 Goodwill $ 38,369 $ 12,082 $ 2,809 $ 53,260 Investments in non-controlled entities $ — $ 599,757 $ 14,110 $ 613,867 Year Ended December 31, 2015 (in thousands) Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 974,505 $ 394,098 $ 176,143 $ — $ 1,544,746 Product sales revenue 623,102 3,587 3,147 — 629,836 Affiliate management fee revenue — 12,495 1,376 — 13,871 Total revenue 1,597,607 410,180 180,666 — 2,188,453 Operating expenses 377,772 89,455 62,526 (3,851 ) 525,902 Cost of product sales 442,621 3,278 1,374 — 447,273 (Earnings) loss of non-controlled entities 193 (63,918 ) (2,758 ) — (66,483 ) Operating margin 777,021 381,365 119,524 3,851 1,281,761 Depreciation and amortization expense 96,244 35,681 31,036 3,851 166,812 G&A expenses 94,482 36,000 20,847 — 151,329 Operating profit $ 586,295 $ 309,684 $ 67,641 $ — $ 963,620 Additions to long-lived assets $ 310,907 $ 289,851 $ 70,290 $ 671,048 As of December 31, 2015 Segment assets $ 2,991,322 $ 2,313,110 $ 677,914 $ 5,982,346 Corporate assets 59,221 Total assets $ 6,041,567 Goodwill $ 38,369 $ 12,082 $ 2,809 $ 53,260 Investments in non-controlled entities $ 12,381 $ 739,470 $ 13,777 $ 765,628 Year Ended December 31, 2016 (in thousands) Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 1,002,368 $ 407,837 $ 181,721 $ (807 ) $ 1,591,119 Product sales revenue 561,759 31,170 6,673 — 599,602 Affiliate management fee revenue 765 12,533 1,391 — 14,689 Total revenue 1,564,892 451,540 189,785 (807 ) 2,205,410 Operating expenses 381,055 88,762 65,704 (5,762 ) 529,759 Cost of product sales 459,989 31,657 1,692 — 493,338 (Earnings) loss of non-controlled entities 968 (76,972 ) (2,692 ) — (78,696 ) Operating margin 722,880 408,093 125,081 4,955 1,261,009 Depreciation and amortization expense 103,388 38,081 31,718 4,955 178,142 G&A expenses 91,795 36,305 19,715 — 147,815 Operating profit $ 527,697 $ 333,707 $ 73,648 $ — $ 935,052 Additions to long-lived assets $ 291,202 $ 250,433 $ 104,728 $ 646,363 As of December 31, 2016 Segment assets $ 3,289,600 $ 2,631,407 $ 791,132 $ 6,712,139 Corporate assets 59,934 Total assets $ 6,772,073 Goodwill $ 38,369 $ 12,082 $ 2,809 $ 53,260 Investments in non-controlled entities $ 31,029 $ 886,920 $ 13,306 $ 931,255

Quarterly Financial Data (Table

Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data	Summarized quarterly financial data is as follows (in thousands, except per unit amounts): 2015 First Quarter Second Quarter Third Quarter Fourth Quarter Revenue $ 530,302 $ 498,427 $ 586,676 $ 573,048 Total costs and expenses $ 320,081 $ 315,206 $ 312,527 $ 343,502 Operating margin $ 297,006 $ 286,145 $ 369,325 $ 329,285 Net income $ 183,636 $ 177,391 $ 250,972 $ 207,123 Basic net income per limited partner unit $ 0.81 $ 0.78 $ 1.10 $ 0.91 Diluted net income per limited partner unit $ 0.81 $ 0.78 $ 1.10 $ 0.91 2016 Revenue $ 519,816 $ 518,897 $ 551,782 $ 614,915 Total costs and expenses $ 321,446 $ 307,709 $ 336,409 $ 383,490 Operating margin $ 300,626 $ 304,371 $ 316,830 $ 339,182 Net income $ 207,070 $ 187,859 $ 194,551 $ 213,291 Basic net income per limited partner unit $ 0.91 $ 0.82 $ 0.85 $ 0.94 Diluted net income per limited partner unit $ 0.91 $ 0.82 $ 0.85 $ 0.93

Fair Value Disclosures (Tables)

Fair Value Disclosures (Tables)	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements, Recurring and Nonrecurring	The following tables summarize the carrying amounts, fair values and fair value measurements recorded or disclosed as of December 31, 2015 and 2016 , based on the three levels established by ASC 820; Fair Value Measurements and Disclosures (in thousands): Fair Value Measurements as of December 31, 2015 using: Assets (Liabilities) Carrying Amount Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Energy commodity derivatives contracts $ 42,721 $ 42,721 $ 42,721 $ — $ — Interest rate contracts $ 1,526 $ 1,526 $ — $ 1,526 $ — Long-term receivables $ 20,374 $ 20,374 $ — $ — $ 20,374 Debt $ (3,439,622 ) $ (3,284,791 ) $ — $ (3,284,791 ) $ — Fair Value Measurements as of December 31, 2016 using: Assets (Liabilities) Carrying Amount Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Energy commodity derivatives contracts $ (30,738 ) $ (30,738 ) $ (30,738 ) $ — $ — Interest rate contracts $ 14,114 $ 14,114 $ — $ 14,114 $ — Long-term receivables $ 23,870 $ 23,870 $ — $ — $ 23,870 Debt $ (4,087,192 ) $ (4,262,321 ) $ — $ (4,262,321 ) $ —

Distributions (Tables)

Distributions (Tables)	12 Months Ended
	Dec. 31, 2016
Distributions Made to Members or Limited Partners [Abstract]
Schedule of Distributions Made to Members or Limited Partners, by Distribution	Distributions we paid during 2014 , 2015 and 2016 were as follows (in thousands, except per unit amount): Payment Date Per Unit Cash Distribution Amount Total Cash Distribution 2/14/2014 $ 0.5850 $ 132,835 5/15/2014 0.6125 139,079 8/14/2014 0.6400 145,324 11/14/2014 0.6675 151,568 Total $ 2.5050 $ 568,806 2/13/2015 $ 0.6950 $ 158,061 5/15/2015 0.7175 163,178 8/14/2015 0.7400 168,296 11/13/2015 0.7625 173,413 Total $ 2.9150 $ 662,948 2/12/2016 $ 0.7850 $ 178,808 5/13/2016 0.8025 182,797 8/12/2016 0.8200 186,783 11/14/2016 0.8375 190,769 Total $ 3.2450 $ 739,157

Partners' Capital(Tables)

Partners' Capital(Tables)	12 Months Ended
	Dec. 31, 2016
Stockholders' Equity Note [Abstract]
Changes In Outstanding Limited Partner Units	The following table details the changes in the number of our limited partner units outstanding from January 1, 2014 through December 31, 2016 : Limited partner units outstanding on January 1, 2014 226,679,438 02/2014—Settlement of 2011 awards 387,216 During 2014—Other (a) 1,603 Limited partner units outstanding on December 31, 2014 227,068,257 01/2015—Settlement of 2012 awards 354,529 During 2015—Other (a) 4,461 Limited partner units outstanding on December 31, 2015 227,427,247 02/2016—Settlement of 2013 awards 350,552 During 2016—Other (a) 6,117 Limited partner units outstanding on December 31, 2016 227,783,916 (a) Limited partner units issued to settle the equity-based retainer paid to independent directors of our general partner.

Organization And Description 46

Organization And Description Of Business (Narrative) (Details) bbl in Millions	Dec. 31, 2016Terminalbblmi
Refined Products Segment [Member]
Organization and Description of Business [Line Items]
Number of Pipeline Terminals | Terminal	53
Number of Independent Terminals | Terminal	26
Refined Products Segment [Member] | Refined Products Transportation Services [Member]
Organization and Description of Business [Line Items]
Pipeline, Length | mi	9,700
Refined Products Segment [Member] | Ammonia Transportation Services [Member]
Organization and Description of Business [Line Items]
Pipeline, Length | mi	1,100
Crude Oil Pipeline and Terminals Segment [Member]
Organization and Description of Business [Line Items]
Pipeline, Length | mi	2,200
Storage Capacity | bbl	26
Contracted Storage | bbl	16
Marine Storage Segment [Member]
Organization and Description of Business [Line Items]
Number of Independent Terminals | Terminal	5
Storage Capacity | bbl	26

Summary Of Significant Accoun47

Summary Of Significant Accounting Policies (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)pension_plan	Dec. 31, 2015USD ($)	Dec. 31, 2014
Summary of Significant Accounting Policies [Line Items]
Equity investments, unamortized excess net investment	$ 61,300	$ 76,700
Intangible asset estimated useful life	21 years
Property, Plant and Equipment, Gross	$ 6,783,737	$ 6,166,766
Interest capitalization threshold for construction in process	$ 500
Long-term Debt, Weighted Average Interest Rate	4.90%	4.70%	4.90%
Number of Pension Plans | pension_plan	3
Deferred Cost Multiplier	0.5
Board of Director Deferred Award Days to Payment	60 days
Minimum [Member]
Summary of Significant Accounting Policies [Line Items]
Intangible asset estimated useful life	6 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Maximum [Member]
Summary of Significant Accounting Policies [Line Items]
Intangible asset estimated useful life	30 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Performance Shares [Member]
Summary of Significant Accounting Policies [Line Items]
Equity-based compensation, award payout percentage, minimum	0.00%
Equity-based compensation, award payout percentage, maximum	200.00%
Equity Based Compensation Award Payout Fluctuation Of Award Market	50.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Condensate Splitter [Member]
Summary of Significant Accounting Policies [Line Items]
Property, Plant and Equipment, Gross	$ 300,000

Consolidated Statements Of Ca48

Consolidated Statements Of Cash Flows - Supplemental Disclosures (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Increase (decrease) in long-term pension and benefits liability	$ 2.5	$ 4.7	$ 33.9

Consolidated Statements Of Ca49

Consolidated Statements Of Cash Flows - Supplemental Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Trade accounts receivable and other accounts receivable	$ (31,107)	$ 3,664	$ 49,215
Inventory	(3,510)	26,894	29,462
Energy commodity derivatives contracts, net of derivatives deposits	(692)	(606)	(7,583)
Accounts payable	(4,423)	4,107	(10,918)
Accrued payroll and benefits	(6,074)	3,466	6,055
Accrued interest payable	14,347	5,323	1,038
Accrued taxes other than income	(1,421)	3,699	9,094
Deferred revenue	20,264	10,485	7,978
Accrued product purchases	20,261	(13,016)	(18,678)
Current and noncurrent environmental liabilities	(7,398)	(4,904)	(2,144)
Other current and noncurrent assets and liabilities	(21,762)	9,250	22,208
Changes in components of operating assets and liabilities	$ (21,515)	$ 48,362	$ 85,727

Investments in Non-Controlled50

Investments in Non-Controlled Entities (Details) - USD ($) $ in Thousands	Feb. 29, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Intangible Assets, Net (Excluding Goodwill)		$ 51,976	$ 1,856
Finite-Lived Intangible Asset, Useful Life		21 years
Gain on exchange of interest in non-controlled entity		$ (28,144)	0	$ 0
Transportation and terminals revenue		1,591,119	1,544,746	1,459,267
Change in Equity Method Investments [Roll Forward]
Investments at December 31, 2015		765,628	613,867
Additional Investments		200,023
Other Adjustment to Equity Investment		(25,105)
Proportionate Share of Equity Earnings		80,974
Amortization of Excess Investment and Capitalized Interest		(2,278)
Income (Loss) from Equity Method Investments		78,696	66,483	19,394
Distributions from investments in non-controlled entities		78,723	66,285	3,086
Distributions in excess of earnings of non-controlled entities		9,264	14,155	5,487
Investments at December 31, 2016		931,255	765,628	613,867
Equity Method Investment, Summarized Financial Information, Current Assets		208,901	158,128
Equity Method Investment, Summarized Financial Information, Noncurrent Assets		1,714,920	1,383,394
Equity Method Investment, Summarized Financial Information, Assets		1,923,821	1,541,522
Equity Method Investment, Summarized Financial Information, Current Liabilities		111,164	149,231
Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities		27,022	7,719
Equity Method Investment, Summarized Financial Information, Liabilities		138,186	156,950
Equity Method Investment Summarized Financial Information, Equity		1,785,635	1,384,572
Equity Method Investment, Summarized Financial Information, Revenue		279,180	246,841	84,056
Equity Method Investment, Summarized Financial Information, Net Income (Loss)		164,684	138,457	$ 41,279
Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Related Party Transaction, Other Revenues from Transactions with Related Party		$ 4,200	1,300
BridgeTex [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage		50.00%
BridgeTex [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Transportation and terminals revenue		$ 35,500	34,600
Double Eagle Pipeline Llc [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage		50.00%
Double Eagle Pipeline Llc [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Transportation and terminals revenue		$ 3,300	3,400
Accounts Receivable, Related Parties, Current		$ 300	$ 200
HoustonLink Pipeline Company LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage		50.00%
Powder Springs Logistics, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage		50.00%
Saddlehorn Pipeline Company [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage		40.00%
Saddlehorn Pipeline Company [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Transportation and terminals revenue		$ 700
Accounts Receivable, Related Parties, Current		$ 100
Seabrook Logistics, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage		50.00%
Texas Frontera Llc [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage		50.00%
Osage Pipeline Co [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	50.00%
Intangible Assets, Net (Excluding Goodwill)	$ 43,700
Nontrade Receivables	$ 8,300
Finite-Lived Intangible Asset, Useful Life	20 years
Gain on exchange of interest in non-controlled entity		$ (28,100)

Inventory (Inventory) (Details)

Inventory (Inventory) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Refined petroleum products	$ 54,285	$ 57,455
Liquefied petroleum gases	24,868	17,954
Transmix	28,319	21,297
Crude oil	20,839	28,385
Additives	6,067	5,777
Total inventory	$ 134,378	$ 130,868

Product Sales Revenue (Disclosu

Product Sales Revenue (Disclosure Of Product Sales Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Product Sales Revenue [Abstract]
Physical sale of petroleum products	$ 638,186	$ 561,410	$ 733,654
NYMEX Adjustments Included in Product Sales	(38,584)	68,426	145,320
Total product sales revenues	$ 599,602	$ 629,836	$ 878,974

Property, Plant and Equipment53

Property, Plant and Equipment and Other Intangibles (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 6,783,737	$ 6,166,766
Depreciation expense	$ 176,700	164,100	$ 159,000
Finite-Lived Intangible Asset, Useful Life	21 years
Amortization of Intangible Assets	$ 1,400	2,700	$ 2,700
Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	206,219	175,197
Capitalized Interest [Member] | Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 43,100	$ 31,400
Minimum [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life	6 years
Maximum [Member]
Property, Plant and Equipment [Line Items]
Finite-Lived Intangible Asset, Useful Life	30 years

Property, Plant and Equipment54

Property, Plant and Equipment and Other Intangibles (Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 6,783,737	$ 6,166,766
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	500,208	476,662
Land [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	339,561	275,277
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	101,065	88,641
Storage Tanks [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,829,223	1,684,430
Pipelines [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,457,429	2,249,067
Processing Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,350,032	1,217,492
Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 206,219	$ 175,197
Minimum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	10 years
Minimum [Member] | Storage Tanks [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	10 years
Minimum [Member] | Pipelines [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	10 years
Minimum [Member] | Processing Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	3 years
Minimum [Member] | Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	3 years
Maximum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	56 years
Maximum [Member] | Storage Tanks [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	40 years
Maximum [Member] | Pipelines [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	69 years
Maximum [Member] | Processing Equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	56 years
Maximum [Member] | Property, Plant and Equipment, Other Types [Member]
Property, Plant and Equipment [Line Items]
Estimated depreciable life, years	48 years

Major Customers and Concentra55

Major Customers and Concentration Of Risks (Details)	12 Months Ended
	Dec. 31, 2016Employee	Dec. 31, 2014customer
Concentration Risk [Line Items]
Concentration Risk, Number of Customers | customer		1
Number of employees	1,747
Refined Products Segment [Member]
Concentration Risk [Line Items]
Number of employees	930
Crude Oil Pipeline and Terminals Segment [Member]
Concentration Risk [Line Items]
Number of employees	141
Marine Storage Segment [Member]
Concentration Risk [Line Items]
Number of employees	171
Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage		12.00%
Concentration Risk, Benchmark Percentage	10.00%
Unionized Employees Concentration Risk [Member] | Refined Products Segment [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	24.00%
Unionized Employees Concentration Risk [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	0.00%
Unionized Employees Concentration Risk [Member] | Marine Storage Segment [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	17.00%

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)pension_plan	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, expenses	$ 9,600	$ 8,900	$ 8,300
Number of Union Pension Plans | pension_plan	2
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year	5.50%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	4.50%
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation	$ 160,642	148,906
Defined Benefit Plan, Fair Value of Plan Assets	166,906	142,742	127,267
Plan amendment	0	(3,610)
Defined Benefit Plan, Future Amortization of Gain (Loss)	(4,100)
Defined Benefit Plan, Future Amortization of Prior Service Cost (Credit)	(200)
Contributions estimated to be paid	22,700
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0	$ 0
Plan amendment	0	$ 0
Defined Benefit Plan, Future Amortization of Gain (Loss)	(800)
Contributions estimated to be paid	$ 500
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	67.00%	67.00%
Fixed Income Securities [Member] | Scenario, Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	70.00%
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	30.00%	30.00%
Equity Securities [Member] | Scenario, Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	30.00%
Salaried and USW [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation		$ 146,800
Defined Benefit Plan, Fair Value of Plan Assets		$ 140,600

Employee Benefit Plans (Changes

Employee Benefit Plans (Changes In Benefit Obligations And Plan Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Pension Plan [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	$ 209,591	$ 190,663
Service cost	18,179	18,890	$ 13,400
Interest cost	7,950	7,754	6,675
Plan participants’ contributions	0	0
Plan amendment	0	(3,610)
Actuarial loss	1,050	574
Benefits paid	(10,053)	(4,680)
Settlements	(747)	0
Benefit obligation at end of year	225,970	209,591	190,663
Change in plan assets:
Beginning balance	142,742	127,267
Employer contributions	25,972	20,482
Plan participants’ contributions	0	0
Actual return on plan assets	8,992	(327)
Benefits paid	(10,053)	(4,680)
Settlements	(747)	0
Fair value of plan assets at end of year	166,906	142,742	127,267
Funded status at end of year	(59,064)	(66,849)
Accumulated benefit obligation	160,642	148,906
Other Postretirement Benefits [Member]
Change in benefit obligation:
Benefit obligation at beginning of year	11,314	12,446
Service cost	235	243	227
Interest cost	489	438	506
Plan participants’ contributions	217	199
Plan amendment	0	0
Actuarial loss	1,481	(579)
Benefits paid	(725)	(1,433)
Settlements	0	0
Benefit obligation at end of year	13,011	11,314	12,446
Change in plan assets:
Beginning balance	0	0
Employer contributions	508	1,234
Plan participants’ contributions	217	199
Actual return on plan assets	0	0
Benefits paid	(725)	(1,433)
Settlements	0	0
Fair value of plan assets at end of year	0	0	$ 0
Funded status at end of year	$ (13,011)	$ (11,314)

Employee Benefit Plans (Amounts

Employee Benefit Plans (Amounts Recognized In Consolidated Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Amounts recognized in consolidated balance sheet:
Long-term pension and benefit cost	$ 71,461	$ 77,551
Accumulated other comprehensive loss:
Accumulated Other Comprehensive Income (Loss), Net of Tax	(101,241)	(96,350)
Pension Plan [Member]
Amounts recognized in consolidated balance sheet:
Current accrued benefit cost	0	0
Long-term pension and benefit cost	59,064	66,849
Net amount recognized in consolidated balance sheet	59,064	66,849
Accumulated other comprehensive loss:
Net actuarial loss	(62,013)	(65,889)
Prior service credit	3,429	3,610
Accumulated Other Comprehensive Income (Loss), Net of Tax	(58,584)	(62,279)	$ (63,257)	$ (36,184)
Amount of Liabilities and Accumulated Other Comprehensive Loss Recognized in Consolidated Balance Sheet	480	4,570
Other Postretirement Benefits [Member]
Amounts recognized in consolidated balance sheet:
Current accrued benefit cost	614	612
Long-term pension and benefit cost	12,397	10,702
Net amount recognized in consolidated balance sheet	13,011	11,314
Accumulated other comprehensive loss:
Net actuarial loss	(7,881)	(7,280)
Prior service credit	0	3,335
Accumulated Other Comprehensive Income (Loss), Net of Tax	(7,881)	(3,945)	$ (1,696)	$ 3,053
Amount of Liabilities and Accumulated Other Comprehensive Loss Recognized in Consolidated Balance Sheet	$ 5,130	$ 7,369

Employee Benefit Plans (Consoli

Employee Benefit Plans (Consolidated Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Pension Plan [Member]
Components of net periodic pension and postretirement benefit expense:
Service cost	$ 18,179	$ 18,890	$ 13,400
Interest cost	7,950	7,754	6,675
Expected return on plan assets	(8,913)	(8,037)	(6,363)
Amortization of prior service cost (credit)	(181)	0	33
Amortization of net actuarial loss	4,645	6,306	3,071
Settlement	202	0	1,809
Net periodic expense (credit)	21,882	24,913	18,625
Other Postretirement Benefits [Member]
Components of net periodic pension and postretirement benefit expense:
Service cost	235	243	227
Interest cost	489	438	506
Expected return on plan assets	0	0	0
Amortization of prior service cost (credit)	(3,335)	(3,713)	(3,713)
Amortization of net actuarial loss	880	885	915
Settlement	0	0	0
Net periodic expense (credit)	$ (1,731)	$ (2,147)	$ (2,065)

Employee Benefit Plans (Other C

Employee Benefit Plans (Other Changes In Plan Assets And Benefit Obligations Recognized In Other Comprehensive Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Changes in AOCL [Roll Forward]
Accumulated Other Comprehensive Income, Beginning Balance		$ (96,350)
Net actuarial loss(2)	[1]	(2,452)	$ (8,359)	$ (33,937)
Plan amendment	[1]	0	3,610	0
Amortization of prior service credit(2)	[1]	(3,516)	(3,713)	(3,680)
Amortization of actuarial loss(2)	[1]	5,525	7,191	3,986
Settlement cost	[1]	202	0	1,809
Total other comprehensive loss		(4,891)	(14,810)	(62,036)
Accumulated Other Comprehensive Income, Ending Balance		(101,241)	(96,350)
Pension Plan [Member]
Changes in AOCL [Roll Forward]
Accumulated Other Comprehensive Income, Beginning Balance		(62,279)	(63,257)	(36,184)
Net actuarial loss(2)		(971)	(8,938)	(31,986)
Plan amendment		0	3,610	0
Amortization of prior service credit(2)		(181)	0	33
Amortization of actuarial loss(2)		4,645	6,306	3,071
Settlement cost		202	0	1,809
Total other comprehensive loss		3,695	978	(27,073)
Accumulated Other Comprehensive Income, Ending Balance		(58,584)	(62,279)	(63,257)
Other Postretirement Benefits [Member]
Changes in AOCL [Roll Forward]
Accumulated Other Comprehensive Income, Beginning Balance		(3,945)	(1,696)	3,053
Net actuarial loss(2)		(1,481)	579	(1,951)
Plan amendment		0	0	0
Amortization of prior service credit(2)		(3,335)	(3,713)	(3,713)
Amortization of actuarial loss(2)		880	885	915
Settlement cost		0	0	0
Total other comprehensive loss		(3,936)	(2,249)	(4,749)
Accumulated Other Comprehensive Income, Ending Balance		$ (7,881)	$ (3,945)	$ (1,696)
[1]	See Note 10–Employee Benefit Plans for additional detail of the changes in employee benefit plan assets and benefit obligations that are recognized in other comprehensive income (loss).

Employee Benefit Plans (Weighte

Employee Benefit Plans (Weighted-Average Rate Assumptions Used For Benefit Obligations) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Pension Plan [Member] | I U O E Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.41%	4.03%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	5.00%	5.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.78%	3.93%	4.89%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	5.00%	5.00%	5.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	6.00%	6.00%	6.00%
Pension Plan [Member] | Salaried Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.21%	3.95%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.95%	3.91%	4.89%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase		5.50%	5.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	6.00%	6.00%	6.00%
Pension Plan [Member] | U S W Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.08%	3.82%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	3.50%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.82%	3.56%	4.07%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	3.50%	3.50%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	6.00%	6.00%	6.00%
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.85%	4.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.00%	3.66%	4.52%
Minimum [Member] | Pension Plan [Member] | Salaried Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	4.00%	4.00%
Minimum [Member] | Pension Plan [Member] | U S W Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	4.00%
Maximum [Member] | Pension Plan [Member] | Salaried Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	11.00%	11.00%
Maximum [Member] | Pension Plan [Member] | U S W Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	11.00%

Employee Benefit Plans (Fair Va

Employee Benefit Plans (Fair Value Of Pension Plan Assets) (Details) - Pension Plan [Member] - USD ($) $ in Thousands		Dec. 31, 2016		Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		$ 166,906		$ 142,742	$ 127,267
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		166,686		142,498
Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		220		244
Small-Cap Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[1]	3,465		3,492
Small-Cap Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[1]	3,465		3,492
Mid-Cap Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[1]	3,472		3,495
Mid-Cap Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[1]	3,472		3,495
Large-Cap Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[1]	26,323		26,304
Large-Cap Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[1]	26,323		26,304
International Equity Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		16,797	[1]	16,530
International Equity Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		16,797	[1]	16,530
Short-Term Bond Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[1]	4,414		3,834
Short-Term Bond Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[1]	4,414		3,834
Intermediate-Term Bond Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[1]	23,629		18,141
Intermediate-Term Bond Funds [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[1]	23,629		18,141
Long-Term Investment Grade Bond Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[1]	83,240		66,758
Long-Term Investment Grade Bond Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	[1]	83,240		66,758
Short-Term Investment Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		5,346		3,944
Short-Term Investment Fund [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		5,346		3,944
Group Annuity Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		220		244
Group Annuity Contract [Member] | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets		$ 220		$ 244
[1]	We hold equity and fixed income securities through investments in mutual funds, which are dedicated to each category as indicated.

Employee Benefit Plans (Investm

Employee Benefit Plans (Investment Strategies) (Details)	12 Months Ended
	Dec. 31, 2016
Small-Cap Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Category	Small-cap fund
Fund's Investment Strategy	Seeks to track performance of the Center for Research in Security Prices (“CRSP”) US Small Cap Index
Mid-Cap Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Category	Mid-cap fund
Fund's Investment Strategy	Seeks to track performance of the CRSP US Mid Cap Index
Large-Cap Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Category	Large-cap funds
Fund's Investment Strategy	Seek to track performance of the Standard & Poor’s 500 Index
International Equity Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Category	International equity fund
Fund's Investment Strategy	Seeks long-term growth of capital by investing 65% or more of assets in international equities
Short-Term Bond Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Category	Short-term bond funds
Fund's Investment Strategy	Seek current income with limited price volatility through investment in primarily high quality bonds
Intermediate-Term Bond Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Category	Intermediate-term bond funds
Fund's Investment Strategy	Seek moderate and sustainable level of current income by investing primarily in high quality fixed income securities with maturities from five to ten years
Long-Term Investment Grade Bond Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Category	Long-term investment grade bond funds
Fund's Investment Strategy	Seek high and sustainable current income through investment primarily in long-term high grade bonds
Short-Term Investment Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Category	Short-term investment fund
Fund's Investment Strategy	Invests in high quality short-term money market instruments issued by the U.S. Treasury
Group Annuity Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Asset Category	Group annuity contract
Fund's Investment Strategy	Earns interest quarterly equal to the effective yield of the 91-day U.S. Treasury bill

Employee Benefit Plans (Target

Employee Benefit Plans (Target Allocation And Actual Weighted-Average Asset Allocation Of Plan Assets) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocation	30.00%	35.00%
Target plan asset allocation	30.00%	30.00%
Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocation	67.00%	62.00%
Target plan asset allocation	67.00%	67.00%
Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual plan asset allocation	3.00%	3.00%
Target plan asset allocation	3.00%	3.00%

Employee Benefit Plans (Expecte

Employee Benefit Plans (Expected Benefit Payments) (Details) $ in Thousands	Dec. 31, 2016USD ($)
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2,017	$ 13,783
2,018	14,016
2,019	13,245
2,020	16,435
2,021	14,438
2022 through 2026	72,826
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
2,017	614
2,018	685
2,019	778
2,020	857
2,021	933
2022 through 2026	$ 4,702

Related Party Transactions (Nar

Related Party Transactions (Narrative) (Details) - Director [Member] - USD ($) $ in Millions	8 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Targa Resource Partners L P [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party		$ 4.7	$ 25.5	$ 28.2
Accounts Payable, Related Parties	$ 2		2
Methvin Company [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Other Revenues from Transactions with Related Party	9.3	16.2
Accounts Receivable, Related Parties, Current	$ 1.3	$ 1.4	$ 1.3

Debt (Narrative) (Details)

Debt (Narrative) (Details)	Sep. 30, 2016USD ($)	Feb. 29, 2016USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months			$ 0
Long-term Debt, Maturities, Repayments of Principal in Year Two			250,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Three			550,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Four			50,000,000
Long-term Debt, Maturities, Repayments of Principal in Year Five			550,000,000
Long-term Debt, Maturities, Repayments of Principal after Year Five			2,700,000,000
Debt Instrument, Face Amount			4,100,000,000	$ 3,430,000,000
Proceeds from Issuance of Senior Long-term Debt			1,142,997,000	499,589,000	$ 257,713,000
Payments of Debt Issuance Costs			10,906,000	6,223,000	$ 2,912,000
Long-term Debt			$ 4,087,192,000	$ 3,439,622,000
Long-term Debt, Weighted Average Interest Rate			4.90%	4.70%	4.90%
Cash Payments for Interest			$ 181,700,000	$ 156,600,000	$ 149,500,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Covenant Description			The revolving credit facility described above requires us to maintain a specified ratio of consolidated debt to EBITDA (as defined in the agreement) of no greater than 5.0 to 1.0
Debt Instrument, Consolidated Debt to EBITDA Ratio			5
Revolving Credit Facility [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 250,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.10%
Debt Instrument, Term			364 days
Short-term Debt			$ 0
Revolving Credit Facility [Member] | Line of Credit [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.00%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.08%
Revolving Credit Facility [Member] | Line of Credit [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.625%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.225%
Revolving Credit Facility [Member] | Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 1,000,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.125%
Long-term Debt			$ 0	0
Letters of Credit Outstanding, Amount			$ 6,300,000	6,300,000
Revolving Credit Facility [Member] | Line of Credit [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.00%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.10%
Revolving Credit Facility [Member] | Line of Credit [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.625%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.275%
Commercial Paper [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 50,000,000	$ 280,000,000
Line of Credit Facility, Maximum Borrowing Capacity			$ 1,000,000,000
Long-term Debt, Weighted Average Interest Rate			0.80%	0.50%
Commercial Paper [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Term			397 days
Four Point Two Five Percentage Notes Due Two Thousand Forty Six [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000,000		$ 500,000,000	$ 0
Debt Instrument, Interest Rate, Stated Percentage	4.25%		4.25%	4.25%
Notes At Price	98.762%
Proceeds from Issuance of Senior Long-term Debt	$ 488,500,000
Payments of Debt Issuance Costs	5,300,000
Five Point Six Five Percentage Notes Due Two Thousand Sixteen [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 250,000,000		$ 0	$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.65%		0.00%	5.65%
4.20% Notes Due 2045 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 250,000,000	$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage			4.20%	4.20%
5.00% Notes Due 2046 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 650,000,000	$ 650,000,000	$ 0
Debt Instrument, Interest Rate, Stated Percentage		5.00%	5.00%	5.00%
Notes At Price		99.875%
Proceeds from Issuance of Senior Long-term Debt		$ 643,800,000
Payments of Debt Issuance Costs		$ 5,400,000

Debt (Consolidated Debt) (Detai

Debt (Consolidated Debt) (Details) - USD ($)		Dec. 31, 2016	Sep. 30, 2016	Feb. 29, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 4,100,000,000			$ 3,430,000,000
Debt Issuance Costs, Net	[1]	(26,948,000)			(18,672,000)
Debt Instrument, Unamortized Discount (Premium), Net	[1]	6,530,000			16,459,000
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge	[1]	7,610,000			11,835,000
Long-term Debt		4,087,192,000			3,439,622,000
Current portion of long-term debt, net		0			250,335,000
Long-term Debt, Excluding Current Maturities		4,087,192,000			3,189,287,000
Five Point Six Five Percentage Notes Due Two Thousand Sixteen [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 0	$ 250,000,000		$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage		0.00%	5.65%		5.65%
6.40% Notes Due 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 250,000,000			$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage		6.40%			6.40%
6.55% Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 550,000,000			$ 550,000,000
Debt Instrument, Interest Rate, Stated Percentage		6.55%			6.55%
4.25% Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 550,000,000			$ 550,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.25%			4.25%
3.20% Notes Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 250,000,000			$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage		3.20%			3.20%
5.00% Notes Due 2046 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 650,000,000		$ 650,000,000	$ 0
Debt Instrument, Interest Rate, Stated Percentage		5.00%		5.00%	5.00%
6.40% Notes Due 2037 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 250,000,000			$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage		6.40%			6.40%
4.20% Notes Due 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 250,000,000			$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.20%			4.20%
5.15% Notes Due 2043 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 550,000,000			$ 550,000,000
Debt Instrument, Interest Rate, Stated Percentage		5.15%			5.15%
4.20% Notes Due 2045 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 250,000,000			$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.20%			4.20%
Four Point Two Five Percentage Notes Due Two Thousand Forty Six [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 500,000,000	$ 500,000,000		$ 0
Debt Instrument, Interest Rate, Stated Percentage		4.25%	4.25%		4.25%
Commercial Paper [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 50,000,000			$ 280,000,000
Line of Credit [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt		$ 0			$ 0
[1]	Debt issuance costs, note discounts and premiums, and realized gains and losses of historical fair value hedges are being amortized or accreted to the applicable notes over the respective lives of those notes.

Derivative Financial Instrume69

Derivative Financial Instruments (Narrative) (Details) bbl in Millions	3 Months Ended			12 Months Ended
	Sep. 30, 2016USD ($)	Mar. 31, 2015USD ($)	Mar. 31, 2014USD ($)	Dec. 31, 2016USD ($)bbl	Dec. 31, 2015USD ($)bbl	Dec. 31, 2014USD ($)
Derivative [Line Items]
Debt Instrument, Face Amount				$ 4,100,000,000	$ 3,430,000,000
Net payment on financial derivatives				19,287,000	42,908,000	$ 3,613,000
Energy commodity derivatives deposits				49,899,000	0
Energy commodity derivatives deposits				$ 0	24,252,000
Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl				0
Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl				0.7
Interest Expense [Member]
Derivative [Line Items]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months				$ (3,000,000)
Four Point Two Five Percentage Notes Due Two Thousand Forty Six [Member]
Derivative [Line Items]
Debt Instrument, Face Amount	$ 500,000,000			$ 500,000,000	$ 0
Debt Instrument, Interest Rate, Stated Percentage	4.25%			4.25%	4.25%
4.20% Notes Due 2045 [Member]
Derivative [Line Items]
Debt Instrument, Face Amount				$ 250,000,000	$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage				4.20%	4.20%
Interest Rate Contract [Member] | Future Debt Issuance 2018 [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount				$ 100,000,000
Derivative Asset, Fair Value, Gross Asset				14,100,000
Interest Rate Contract [Member] | Four Point Two Five Percentage Notes Due Two Thousand Forty Six [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 250,000,000
Debt Instrument, Face Amount	$ 500,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.25%
Net payment on financial derivatives	$ (19,300,000)
Interest Rate Contract [Member] | 4.20% Notes Due 2045 [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount		$ 250,000,000
Debt Instrument, Face Amount		$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.20%
Net payment on financial derivatives		$ 42,900,000
Interest Rate Contract [Member] | 5.15% Notes Due Two Thousand Forty Three [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount			$ 200,000,000
Debt Instrument, Face Amount			$ 250,000,000
Debt Instrument, Interest Rate, Stated Percentage			5.15%
Net payment on financial derivatives			$ 3,600,000
Commodity Contract [Member]
Derivative [Line Items]
Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness				$ 5,200,000	$ 1,000,000	$ (8,600,000)
Commodity Contract [Member] | Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl				0.7	0.7

Derivative Financial Instrume70

Derivative Financial Instruments (Schedule Of NYMEX Contracts And Butane Price Swap Purchase Agreements) (Details) - bbl bbl in Millions	Dec. 31, 2016	Dec. 31, 2015
Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	0
Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	0.7
Fair Value Hedging [Member] | Commodity Contract [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	0.7	0.7
Economic Hedges [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	3.9
Economic Hedges Futures [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	0.7

Derivative Financial Instrume71

Derivative Financial Instruments (Schedule of Derivative Offset Amounts) (Details) - Exchange Traded [Member] - USD ($) $ in Thousands		Dec. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability		$ (36,798)	$ (5,646)
Derivative Asset, Fair Value, Gross Asset		6,060	48,367
Derivative Asset, Fair Value, Amount Not Offset Against Collateral		(30,738)
Derivative, Collateral, Obligation to Return Cash		(49,899)
Amount After Offset	[1]	$ 19,161	18,469
Derivative Asset, Fair Value, Amount Not Offset Against Collateral	[2]		42,721
Derivative, Collateral, Obligation to Return Cash			24,252
Other Current Assets [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral			39,243
Other Noncurrent Assets [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Amount Not Offset Against Collateral			$ 3,478
[1]	This represents the maximum amount of loss we would incur if our counterparties failed to perform on their derivative contracts.
[2]	Net amount includes energy commodity derivative contracts classified as current assets, net of $39,243 and noncurrent assets of $3,478.

Derivative Financial Instrume72

Derivative Financial Instruments (Amounts Included in AOCL) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax		$ (30,126)	$ (16,587)	$ 13,627
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	[1]	(6,699)	(14,904)	(30,090)
Reclassification of net loss (gain) on cash flow hedges to income(1)	[1]	2,049	1,365	(124)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax		$ (34,776)	$ (30,126)	$ (16,587)
[1]	See Note 13–Derivative Financial Instruments for details of the amount of gain/loss recognized in accumulated other comprehensive loss (“AOCL”) on derivatives and the amount of gain/loss reclassified from AOCL into income.

Derivative Financial Instrume73

Derivative Financial Instruments (Derivatives And Hedging-Cash Flow Hedges) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	[1]	$ (6,699)	$ (14,904)	$ (30,090)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax		(6,699)	(14,904)	(30,090)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion		(2,049)	(1,365)	(242)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax		$ 0	$ 0	$ 366
[1]	See Note 13–Derivative Financial Instruments for details of the amount of gain/loss recognized in accumulated other comprehensive loss (“AOCL”) on derivatives and the amount of gain/loss reclassified from AOCL into income.

Derivative Financial Instrume74

Derivative Financial Instruments (Fair Value Hedging Disclosures) (Details) - Commodity Contract [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Increase (Decrease) in Fair Value of Price Risk Fair Value Hedging Instruments	$ (9)	$ 15.6	$ 13.5
Increase (Decrease) in Fair Value of Hedged Item in Price Risk Fair Value Hedge	$ 9	$ (15.6)	$ (13.5)

Derivative Financial Instrume75

Derivative Financial Instruments (Derivatives And Hedging-Overall-Subsequent Measurement) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (32,586)	$ 71,248	$ 145,997
Sales [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(38,584)	68,426	145,320
Operating Expenses [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(5,000)	11,819	17,818
Cost of Sales [Member] | Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 10,998	$ (8,997)	$ (17,141)

Derivative Financial Instrume76

Derivative Financial Instruments (Derivatives And Hedging-Designated) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 14,114	$ 5,717
Derivative Liability, Fair Value, Gross Liability	3,079	653
Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	60
Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	3,079	0
Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset		3,478
Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability		0
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	14,114	2,179
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	0	653
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	6,060	44,829
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 33,719	$ 5,646

Leases (Narrative) (Details)

Leases (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016USD ($)mi	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Operating Leases [Line Items]
Total rent expense | $	$ 30.2	$ 25.7	$ 21
Minimum [Member]
Operating Leases [Line Items]
Lessor Leasing Arrangements, Operating Leases, Term of Contract	1 year
Maximum [Member]
Operating Leases [Line Items]
Lessor Leasing Arrangements, Operating Leases, Term of Contract	20 years
Texas and New Mexico Pipeline (Leased) [Member]
Operating Leases [Line Items]
Pipeline, Length | mi	40

Leases (Lessee, future minimum

Leases (Lessee, future minimum rental payments) (Details) $ in Millions	Dec. 31, 2016USD ($)
Leases [Abstract]
2,017	$ 38.6
2,018	32.9
2,019	21.1
2,020	17.8
2,021	17.4
Thereafter	110.6
Total	$ 238.4

Leases (Lessor, future minimum

Leases (Lessor, future minimum payments receivable) (Details) $ in Millions	Dec. 31, 2016USD ($)
Leases [Abstract]
2,017	$ 227.6
2,018	208.7
2,019	158.8
2,020	109.6
2,021	77
Thereafter	188.5
Total	$ 970.2

Leases (Investment in Direct Fi

Leases (Investment in Direct Financing Lease) (Details) $ in Millions	Dec. 31, 2016USD ($)mi	Dec. 31, 2015USD ($)
Direct Financing Lease [Line Items]
Direct Financing Lease, Minimum Payments to be Received	$ 23.3	$ 30.7
Direct Financing Lease, Unearned Income	4.8	5.8
Direct Financing Lease, Net Investment	18.5	24.9
Direct Financing Leases, Future Minimum Payments Receivable, Next Twelve Months	4.1
Direct Financing Leases, Future Minimum Payments, Receivable in Two Years	1.7
Direct Financing Leases, Future Minimum Payments Due in Three Years	1.7
Direct Financing Leases, Future Minimum Payments, Receivable in Four Years	1.7
Direct Financing Leases, Future Minimum Payments Due in Five Years	1.7
Other Current Assets [Member]
Direct Financing Lease [Line Items]
Direct Financing Lease, Net Investment	3.4	6.4
Other Noncurrent Assets [Member]
Direct Financing Lease [Line Items]
Direct Financing Lease, Net Investment	$ 15.1	$ 18.5
Texas and New Mexico Pipeline (Leased) [Member]
Direct Financing Lease [Line Items]
Pipeline, Length | mi	40

Long-Term Incentive Plan (Narra

Long-Term Incentive Plan (Narrative) (Details) shares in Millions	12 Months Ended
	Dec. 31, 2016shares
Long Term Incentive Plan [Line Items]
Limited partners' capital account, units issued	11.9
Limited partner unitholders, units remaining available	3
Share-based Compensation Arrangement by Share-based Payment Award, Period Within Change-In-Control	2 years
Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Equity Based Compensation, Award Payout Percentage, Minimum	0.00%
Equity Based Compensation, Award Payout Percentage, Maximum	200.00%
Equity Based Compensation Award Payout Fluctuation Of Award Market	50.00%

Long-Term Incentive Plan (Chang

Long-Term Incentive Plan (Changes In Non-Vested Unit Awards) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested units - 1/1/2016	370,922
Units granted	232,645
Units vested during 2016	(173,143)
Units forfeited during 2016	(34,310)
Non-vested units - 12/31/16	396,114	370,922
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested units - 1/1/2016	$ 79.97
Units granted during 2016	69.35
Units vested during 2016	72.27
Units forfeited during 2016	75.66
Non-vested units - 12/31/16	$ 77.47	$ 79.97
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested units - 1/1/2016	313,240
Units granted	193,344	148,028	187,371
Units vested during 2016	(163,632)
Units forfeited during 2016	(29,256)
Non-vested units - 12/31/16	313,696	313,240
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested units - 1/1/2016	$ 79.64
Units granted during 2016	70.29	$ 88.78	$ 72.77
Units vested during 2016	72.32
Units forfeited during 2016	76.08
Non-vested units - 12/31/16	$ 78.03	$ 79.64
Time-Based Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Non-vested units - 1/1/2016	57,682
Units granted	39,301	26,421	33,903
Units vested during 2016	(9,511)
Units forfeited during 2016	(5,054)
Non-vested units - 12/31/16	82,418	57,682
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Non-vested units - 1/1/2016	$ 81.74
Units granted during 2016	64.76	$ 81.51	$ 82.86
Units vested during 2016	71.40
Units forfeited during 2016	73.20
Non-vested units - 12/31/16	$ 75.36	$ 81.74

Long-Term Incentive Plan (Total

Long-Term Incentive Plan (Total Non-Vested Unit Awards) (Details) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Long Term Incentive Plan [Line Items]
Non-vested units		396,114	370,922
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results		32,834
Total Unit Award Accrual		428,948
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	[1]	$ 16.2
Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Non-vested units		313,696	313,240
Time-Based Awards [Member]
Long Term Incentive Plan [Line Items]
Non-vested units		82,418	57,682
2015 Awards [Member] | Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Non-vested units		131,335
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results		32,834
Total Unit Award Accrual		164,169
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	[1]	$ 4.8
2016 Awards [Member] | Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Non-vested units		182,361
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results		0
Total Unit Award Accrual		182,361
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	[1]	$ 8.5
Retention Awards Vesting 2017 [Member] | Time-Based Awards [Member]
Long Term Incentive Plan [Line Items]
Non-vested units		50,488
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results		0
Total Unit Award Accrual		50,488
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	[1]	$ 1.5
Retention Awards Vesting 2018 [Member] | Time-Based Awards [Member]
Long Term Incentive Plan [Line Items]
Non-vested units		30,456
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results		0
Total Unit Award Accrual		30,456
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	[1]	$ 1.3
Retention Awards Vesting 2020 [Member] | Time-Based Awards [Member]
Long Term Incentive Plan [Line Items]
Non-vested units		1,474
Adjustment to Unit Awards in Anticipation of Achieving Above- Target Financial Results		0
Total Unit Award Accrual		1,474
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	[1]	$ 0.1
[1]	Unrecognized compensation expense will be recognized over the remaining vesting period of the awards.

Long-Term Incentive Plan (Weigh

Long-Term Incentive Plan (Weighted-Average Grant Date Fair Values) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Long Term Incentive Plan [Line Items]
Units granted	232,645
Weighted-Average Grant Date Fair Value	$ 69.35
Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Units granted	193,344	148,028	187,371
Weighted-Average Grant Date Fair Value	$ 70.29	$ 88.78	$ 72.77
Time-Based Awards [Member]
Long Term Incentive Plan [Line Items]
Units granted	39,301	26,421	33,903
Weighted-Average Grant Date Fair Value	$ 64.76	$ 81.51	$ 82.86

Long-Term Incentive Plan (Veste

Long-Term Incentive Plan (Vested Unit Awards) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Total Unit Award Accrual Number	361,711	506,393	528,984
Fair Value of Unit Awards on Vesting Date (in millions)	$ 22.6	$ 27.7	$ 22.4
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested	$ 27.4	$ 34.4	$ 43.7

Long-Term Incentive Plan (Cash

Long-Term Incentive Plan (Cash Flow Effects Of LTIP Settlements) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Partners' Capital Account, Units, Unit-based Compensation	350,552	354,529	387,216
Settlement of tax withholdings on long-term incentive compensation	$ 14,376	$ 17,784	$ 14,813
Payments for Other Taxes	1,400	1,700	1,200
Total Cash Taxes Paid (in millions)	$ 15,800	$ 19,500	$ 16,000

Long-Term Incentive Plan (Equit

Long-Term Incentive Plan (Equity-Based Incentive Compensation Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Long Term Incentive Plan [Line Items]
Allocation of LTIP expense on Consolidated Statements of Income	$ 19,358	$ 24,245	$ 27,284
G&A Expense [Member]
Long Term Incentive Plan [Line Items]
Allocation of LTIP expense on Consolidated Statements of Income	19,204	23,937	26,700
Operating Expenses [Member]
Long Term Incentive Plan [Line Items]
Allocation of LTIP expense on Consolidated Statements of Income	154	308	584
Time-Based Awards [Member]
Long Term Incentive Plan [Line Items]
Allocation of LTIP expense on Consolidated Statements of Income	2,252	1,199	1,624
2012 Awards [Member] | Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Allocation of LTIP expense on Consolidated Statements of Income	0	0	8,314
2013 Awards [Member] | Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Allocation of LTIP expense on Consolidated Statements of Income	0	10,658	10,852
2014 Awards [Member] | Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Allocation of LTIP expense on Consolidated Statements of Income	7,928	7,471	6,494
2015 Awards [Member] | Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Allocation of LTIP expense on Consolidated Statements of Income	4,874	4,917	0
2016 Awards [Member] | Performance Shares [Member]
Long Term Incentive Plan [Line Items]
Allocation of LTIP expense on Consolidated Statements of Income	$ 4,304	$ 0	$ 0

Segment Disclosures (Segment Re

Segment Disclosures (Segment Reporting Information By Segment) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Transportation and terminals revenue									$ 1,591,119	$ 1,544,746	$ 1,459,267
Product sales revenue									599,602	629,836	878,974
Affiliate management fee revenue									14,689	13,871	22,111
Total revenue	$ 614,915	$ 551,782	$ 518,897	$ 519,816	$ 573,048	$ 586,676	$ 498,427	$ 530,302	2,205,410	2,188,453	2,360,352
Operating expenses									529,759	525,902	500,901
Cost of product sales									493,338	447,273	594,585
Earnings of non-controlled entities									(78,696)	(66,483)	(19,394)
Operating margin	339,182	$ 316,830	$ 304,371	$ 300,626	329,285	$ 369,325	$ 286,145	$ 297,006	1,261,009	1,281,761	1,284,260
Depreciation and amortization expense									178,142	166,812	161,741
G&A expenses									147,815	151,329	148,288
Operating profit									935,052	963,620	974,231
Total assets	6,772,073				6,041,567				6,772,073	6,041,567	5,501,409
Goodwill	53,260				53,260				53,260	53,260	53,260
Investments in non-controlled entities	931,255				765,628				931,255	765,628	613,867
Operating Segments [Member]
Segment Reporting Information [Line Items]
Additions to long-lived assets									646,363	671,048	622,012
Total assets	6,712,139				5,982,346				6,712,139	5,982,346	5,460,554
Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue									1,002,368	974,505	946,612
Product sales revenue									561,759	623,102	872,537
Affiliate management fee revenue									765	0	0
Total revenue									1,564,892	1,597,607	1,819,149
Operating expenses									381,055	377,772	356,057
Cost of product sales									459,989	442,621	592,887
Earnings of non-controlled entities									968	193	0
Operating margin									722,880	777,021	870,205
Depreciation and amortization expense									103,388	96,244	101,642
G&A expenses									91,795	94,482	96,411
Operating profit									527,697	586,295	672,152
Additions to long-lived assets									291,202	310,907	163,753
Total assets	3,289,600				2,991,322				3,289,600	2,991,322	2,875,412
Goodwill	38,369				38,369				38,369	38,369	38,369
Investments in non-controlled entities	31,029				12,381				31,029	12,381	0
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue									407,837	394,098	341,915
Product sales revenue									31,170	3,587	0
Affiliate management fee revenue									12,533	12,495	20,790
Total revenue									451,540	410,180	362,705
Operating expenses									88,762	89,455	83,184
Cost of product sales									31,657	3,278	0
Earnings of non-controlled entities									(76,972)	(63,918)	(16,309)
Operating margin									408,093	381,365	295,830
Depreciation and amortization expense									38,081	35,681	27,800
G&A expenses									36,305	36,000	29,557
Operating profit									333,707	309,684	238,473
Additions to long-lived assets									250,433	289,851	439,846
Total assets	2,631,407				2,313,110				2,631,407	2,313,110	1,937,242
Goodwill	12,082				12,082				12,082	12,082	12,082
Investments in non-controlled entities	886,920				739,470				886,920	739,470	599,757
Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue									181,721	176,143	170,740
Product sales revenue									6,673	3,147	6,437
Affiliate management fee revenue									1,391	1,376	1,321
Total revenue									189,785	180,666	178,498
Operating expenses									65,704	62,526	65,173
Cost of product sales									1,692	1,374	1,698
Earnings of non-controlled entities									(2,692)	(2,758)	(3,085)
Operating margin									125,081	119,524	114,712
Depreciation and amortization expense									31,718	31,036	28,786
G&A expenses									19,715	20,847	22,320
Operating profit									73,648	67,641	63,606
Additions to long-lived assets									104,728	70,290	18,413
Total assets	791,132				677,914				791,132	677,914	647,900
Goodwill	2,809				2,809				2,809	2,809	2,809
Investments in non-controlled entities	13,306				13,777				13,306	13,777	14,110
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total assets	$ 59,934				$ 59,221				59,934	59,221	40,855
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue									(807)	0	0
Product sales revenue									0	0	0
Affiliate management fee revenue									0	0	0
Total revenue									(807)	0	0
Operating expenses									(5,762)	(3,851)	(3,513)
Cost of product sales									0	0	0
Earnings of non-controlled entities									0	0	0
Operating margin									4,955	3,851	3,513
Depreciation and amortization expense									4,955	3,851	3,513
G&A expenses									0	0	0
Operating profit									$ 0	$ 0	$ 0

Commitments and Contingencies (

Commitments and Contingencies (Details) (Narrative) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies	$ 24	$ 31.4
Environmental Remediation Expense	5.9	8.4	$ 5
Recorded Third-Party Environmental Recoveries Receivable	4.1	2.6
Recorded Third-Party Environmental Recoveries, Amount	0.9	0.5	$ 0.5
Accounts Receivable [Member]
Loss Contingencies [Line Items]
Recorded Third-Party Environmental Recoveries Receivable	0.6	0.7
Other Noncurrent Assets [Member]
Loss Contingencies [Line Items]
Recorded Third-Party Environmental Recoveries Receivable	$ 3.5	$ 1.9

Quarterly Financial Data (Detai

Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Total revenue	$ 614,915	$ 551,782	$ 518,897	$ 519,816	$ 573,048	$ 586,676	$ 498,427	$ 530,302	$ 2,205,410	$ 2,188,453	$ 2,360,352
Total costs and expenses	383,490	336,409	307,709	321,446	343,502	312,527	315,206	320,081	1,349,054	1,291,316	1,405,515
Operating margin (loss)	339,182	316,830	304,371	300,626	329,285	369,325	286,145	297,006	1,261,009	1,281,761	1,284,260
Net income	$ 213,291	$ 194,551	$ 187,859	$ 207,070	$ 207,123	$ 250,972	$ 177,391	$ 183,636	$ 802,771	$ 819,122	$ 839,519
Basic net income per limited partner unit (in dollars per unit)	$ 0.94	$ 0.85	$ 0.82	$ 0.91	$ 0.91	$ 1.10	$ 0.78	$ 0.81	$ 3.52	$ 3.60	$ 3.69
Diluted net income per limited partner unit (in dollars per unit)	$ 0.93	$ 0.85	$ 0.82	$ 0.91	$ 0.91	$ 1.10	$ 0.78	$ 0.81	$ 3.52	$ 3.59	$ 3.69

Fair Value Disclosures (Details

Fair Value Disclosures (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term receivables	$ 0	$ 0
Debt	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term receivables	0	0
Debt	(4,262,321)	(3,284,791)
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term receivables	23,870	20,374
Debt	0	0
Commodity Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset		42,721
Derivative Liability	30,738
Commodity Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset		0
Derivative Liability	0
Commodity Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset		0
Derivative Liability	0
Interest Rate Contract [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0
Interest Rate Contract [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	14,114	1,526
Interest Rate Contract [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	0	0
Reported Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term receivables	23,870	20,374
Debt	(4,087,192)	(3,439,622)
Reported Value Measurement [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset		42,721
Derivative Liability	30,738
Reported Value Measurement [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	14,114	1,526
Estimate of Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term receivables	23,870	20,374
Debt	(4,262,321)	(3,284,791)
Estimate of Fair Value Measurement [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset		42,721
Derivative Liability	30,738
Estimate of Fair Value Measurement [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 14,114	$ 1,526

Distributions (Distributions) (

Distributions (Distributions) (Details) - USD ($) $ / shares in Units, $ in Thousands	Nov. 14, 2016	Aug. 12, 2016	May 13, 2016	Feb. 12, 2016	Nov. 13, 2015	Aug. 14, 2015	May 15, 2015	Feb. 13, 2015	Nov. 14, 2014	Aug. 14, 2014	May 15, 2014	Feb. 14, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Distributions Made to Limited Liability Company (LLC) Member [Line Items]
Per unit cash distribution amount (in dollars per unit)	$ 0.8375	$ 0.8200	$ 0.8025	$ 0.7850	$ 0.7625	$ 0.7400	$ 0.7175	$ 0.6950	$ 0.6675	$ 0.6400	$ 0.6125	$ 0.5850	$ 3.2450	$ 2.9150	$ 2.5050
Limited partner units	$ 190,769	$ 186,783	$ 182,797	$ 178,808	$ 173,413	$ 168,296	$ 163,178	$ 158,061	$ 151,568	$ 145,324	$ 139,079	$ 132,835	$ 739,157	$ 662,948	$ 568,806

Partners' Capital (Changes In L

Partners' Capital (Changes In Limited Partner Units Outstanding) (Details) - shares		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Limited Partners' Capital Account [Roll Forward]
Limited partner unitholders, units outstanding		227,427,247	227,068,257	226,679,438
Partners' Capital Account, Units, Unit-based Compensation		350,552	354,529	387,216
Limited partner unitholders, units outstanding		227,783,916	227,427,247	227,068,257
Limited Partners' Capital Account, Right to Receive Distribution in Cash, Period		45 days
Limited Partners' Capital Account, Removal of Magellan GP, LLC, Percentage Vote		100.00%
Limited Partners' Capital Account, Annual Report Available, Period		120 days
Limited Partners' Capital Account, Tax Reporting Information, Period		90 days
Management [Member]
Limited Partners' Capital Account [Roll Forward]
Partners' Capital Account, Units, Unit-based Compensation		350,552	354,529	387,216
Director [Member]
Limited Partners' Capital Account [Roll Forward]
Partners' Capital Account, Units, Unit-based Compensation	[1]	6,117	4,461	1,603
[1]	Limited partner units issued to settle the equity-based retainer paid to independent directors of our general partner.

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands		Feb. 14, 2017	Feb. 02, 2017	Jan. 31, 2017	Nov. 14, 2016	Aug. 12, 2016	May 13, 2016	Feb. 12, 2016	Nov. 13, 2015	Aug. 14, 2015	May 15, 2015	Feb. 13, 2015	Nov. 14, 2014	Aug. 14, 2014	May 15, 2014	Feb. 14, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Subsequent Event [Line Items]
Partners' Capital Account, Units, Unit-based Compensation																	350,552	354,529	387,216
Units granted																	232,645
Cash distribution per limited partner unit					$ 0.8375	$ 0.8200	$ 0.8025	$ 0.7850	$ 0.7625	$ 0.7400	$ 0.7175	$ 0.6950	$ 0.6675	$ 0.6400	$ 0.6125	$ 0.5850	$ 3.2450	$ 2.9150	$ 2.5050
Total cash distributions					$ 190,769	$ 186,783	$ 182,797	$ 178,808	$ 173,413	$ 168,296	$ 163,178	$ 158,061	$ 151,568	$ 145,324	$ 139,079	$ 132,835	$ 739,157	$ 662,948	$ 568,806
Subsequent Event [Member]
Subsequent Event [Line Items]
Partners' Capital Account, Units, Unit-based Compensation				240,640
Units granted			207,445
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Cash distribution per limited partner unit		$ 0.855
Total cash distributions		$ 195,000
Management [Member]
Subsequent Event [Line Items]
Partners' Capital Account, Units, Unit-based Compensation																	350,552	354,529	387,216
Management [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Partners' Capital Account, Units, Unit-based Compensation				216,679
Director [Member]
Subsequent Event [Line Items]
Partners' Capital Account, Units, Unit-based Compensation	[1]																6,117	4,461	1,603
Director [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Partners' Capital Account, Units, Unit-based Compensation				23,961
[1]	Limited partner units issued to settle the equity-based retainer paid to independent directors of our general partner.