Magellan Midstream Partners (MMP) 10-Q 29 Apr 21 2021 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2021	Apr. 28, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	1-16335
Entity Registrant Name	Magellan Midstream Partners, L.P.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	73-1599053
Entity Address, Address Line One	One Williams Center
Entity Address, Address Line Two	P.O. Box 22186
Entity Address, City or Town	Tulsa
Entity Address, State or Province	OK
Entity Address, Postal Zip Code	74121-2186
City Area Code	918
Local Phone Number	574-7000
Title of 12(b) Security	Common Units
Trading Symbol	MMP
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		223,282,818
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001126975
Current Fiscal Year End Date	--12-31

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues	$ 661,073	$ 782,806
Costs and expenses:
Operating	130,604	149,508
Cost of product sales	184,867	249,236
Depreciation, amortization and impairment	58,128	63,534
General and administrative	46,580	36,908
Total costs and expenses	420,179	499,186
Other operating income (expense)	(462)	(511)
Earnings of non-controlled entities	39,052	43,660
Operating profit	279,484	326,769
Interest expense	56,979	55,900
Interest capitalized	(508)	(4,951)
Interest income	(153)	(420)
Gain on disposition of assets	0	(12,887)
Other (income) expense	1,059	807
Income before provision for income taxes	222,107	288,320
Provision for income taxes	789	756
Net income	$ 221,318	$ 287,564
Basic net income per common unit (in dollars per share)	$ 0.99	$ 1.26
Diluted net income per common unit (in dollars per share)	$ 0.99	$ 1.26
Weighted average number of common units outstanding used for basic net income per unit calculation (in shares)	223,593	227,571
Weighted average number of common units outstanding used for diluted net income per unit calculation (in shares)	223,593	227,571
Service [Member]
Revenues	$ 425,170	$ 458,395
Product [Member]
Revenues	230,601	319,120
Product and Service, Other [Member]
Revenues	$ 5,302	$ 5,291

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 221,318	$ 287,564
Other comprehensive income (loss):
Net loss on cash flow hedges	0	(11,914)
Reclassification of net loss on cash flow hedges to income	887	809
Net actuarial loss	0	(747)
Curtailment gain	0	1,703
Recognition of prior service credit amortization in income	(45)	(45)
Recognition of actuarial loss amortization in income	1,691	1,531
Recognition of settlement cost in income	0	969
Total other comprehensive income (loss)	2,533	(7,694)
Comprehensive income	$ 223,851	$ 279,870

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 4,073	$ 13,036
Trade accounts receivable	142,948	109,136
Other accounts receivable	35,355	37,075
Inventory	212,773	167,389
Commodity derivatives deposits	40,029	34,165
Other current assets	42,967	44,392
Total current assets	478,145	405,193
Property, plant and equipment	8,370,208	8,352,825
Less: accumulated depreciation	2,143,840	2,091,134
Net property, plant and equipment	6,226,368	6,261,691
Investments in non-controlled entities	1,203,339	1,213,856
Right-of-use asset, operating leases	194,463	166,078
Long-term receivables	21,590	22,755
Goodwill	52,830	52,830
Other intangibles (less accumulated amortization of $9,228 and $9,881 at December 31, 2020 and March 31, 2021, respectively)	44,272	44,925
Restricted cash	8,878	9,411
Other noncurrent assets	18,343	20,243
Total assets	8,248,228	8,196,982
Current liabilities:
Accounts payable	102,199	100,022
Accrued payroll and benefits	40,035	52,490
Accrued interest payable	49,992	58,998
Accrued taxes other than income	48,481	68,313
Deferred revenue	98,710	98,897
Accrued product liabilities	137,976	79,166
Commodity derivatives contracts, net	20,792	22,372
Current portion of operating lease liability	26,661	27,533
Other current liabilities	35,917	50,783
Total current liabilities	560,763	558,574
Long-term operating lease liability	168,817	137,483
Long-term debt, net	4,996,142	4,978,691
Long-term pension and benefits	165,145	163,776
Other noncurrent liabilities	60,329	54,652
Commitments and contingencies
Partners’ capital:
Common unitholders (223,120 units and 223,283 units outstanding at December 31, 2020 and March 31, 2021, respectively)	2,477,689	2,486,996
Accumulated other comprehensive loss	(180,657)	(183,190)
Total partners’ capital	2,297,032	2,303,806
Total liabilities and partners’ capital	$ 8,248,228	$ 8,196,982

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Finite-lived intangible assets, accumulated amortization	$ 9,881	$ 9,228
Limited partner unitholders, units outstanding (in shares)	223,282,818	223,119,811

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating Activities:
Net income	$ 221,318	$ 287,564
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and impairment expense	58,128	63,534
Gain on sale and retirement of assets	0	(13,002)
Earnings of non-controlled entities	(39,052)	(43,660)
Distributions from operations of non-controlled entities	51,434	54,743
Equity-based incentive compensation expense	4,679	155
Settlement gain, amortization of prior service credit and actuarial loss	1,646	1,113
Changes in operating assets and liabilities:
Trade accounts receivable and other accounts receivable	(32,092)	29,988
Inventory	(45,384)	112,007
Accounts payable	10,235	7,926
Accrued payroll and benefits	(12,455)	(43,962)
Accrued interest payable	(9,006)	(16,792)
Accrued taxes other than income	(19,832)	(17,673)
Accrued product liabilities	58,810	(38,440)
Deferred revenue	(187)	3,656
Other current and noncurrent assets and liabilities	(8,003)	(2,536)
Net cash provided by operating activities	240,239	384,621
Investing Activities:
Additions to property, plant and equipment, net	(29,952)	(172,671)
Proceeds from sale and disposition of assets	656	332,789
Investments in non-controlled entities	(1,865)	(28,325)
Net cash provided (used) by investing activities	(31,161)	131,793
Financing Activities:
Distributions paid	(229,423)	(234,774)
Net commercial paper borrowings	17,000	0
Payments associated with settlement of equity-based incentive compensation	(6,151)	(14,700)
Repurchases of common units	0	(201,982)
Net cash used by financing activities	(218,574)	(451,456)
Change in cash, cash equivalents and restricted cash	(9,496)	64,958
Cash, cash equivalents and restricted cash at beginning of period	22,447	84,599
Cash, cash equivalents and restricted cash at end of period	12,951	149,557
Supplemental non-cash investing activities:
Additions to property, plant and equipment	(20,723)	(152,292)
Changes in accounts payable and other current liabilities related to capital expenditures	(9,229)	(20,379)
Additions to property, plant and equipment, net	$ (29,952)	$ (172,671)

Consolidated Statement of Partn

Consolidated Statement of Partners' Capital Statement - USD ($) $ in Thousands	Total	Common Unitholders	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2019	$ 2,715,028	$ 2,877,105	$ (162,077)
Comprehensive income:
Net income	287,564	287,564
Total other comprehensive income (loss)	(7,694)		(7,694)
Comprehensive income	279,870	287,564	(7,694)
Distributions	(234,774)	(234,774)
Equity-based incentive compensation expense	155	155
Repurchases of common units	(201,982)	(201,982)
Issuance of common units in settlement of equity-based incentive plan awards	600	600
Payments associated with settlement of equity-based incentive compensation	(14,700)	(14,700)
Other	(220)	(220)
Ending balance at Mar. 31, 2020	2,543,977	2,713,748	(169,771)
Beginning balance at Dec. 31, 2020	2,303,806	2,486,996	(183,190)
Comprehensive income:
Net income	221,318	221,318
Total other comprehensive income (loss)	2,533		2,533
Comprehensive income	223,851	221,318	2,533
Distributions	(229,423)	(229,423)
Equity-based incentive compensation expense	4,679	4,679
Issuance of common units in settlement of equity-based incentive plan awards	520	520
Payments associated with settlement of equity-based incentive compensation	(6,151)	(6,151)
Other	(250)	(250)
Ending balance at Mar. 31, 2021	$ 2,297,032	$ 2,477,689	$ (180,657)

Organization, Description of Bu

Organization, Description of Business And Basis Of Presentation	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Description of Business and Basis of Presentation	Organization, Description of Business and Basis of Presentation Organization Unless indicated otherwise, the terms “our,” “we,” “us” and similar language refer to Magellan Midstream Partners, L.P. together with its subsidiaries. Magellan Midstream Partners, L.P. is a Delaware limited partnership, and its common units are traded on the New York Stock Exchange under the ticker symbol “MMP.” Magellan GP, LLC, a wholly-owned Delaware limited liability company, serves as its general partner. Description of Business We are principally engaged in the transportation, storage and distribution of refined petroleum products and crude oil. As of March 31, 2021, our asset portfolio consisted of: • our refined products segment, comprised of our approximately 9,800-mile refined petroleum products pipeline system with 54 connected terminals, as well as 25 independent terminals not connected to our pipeline system and two marine storage terminals (one of which is owned through a joint venture); and • our crude oil segment, comprised of approximately 2,200 miles of crude oil pipelines, a condensate splitter and 37 million barrels of aggregate storage capacity, of which approximately 27 million barrels are used for contract storage. Approximately 1,000 miles of these pipelines, the condensate splitter and 30 million barrels of this storage capacity (including 24 million barrels used for contract storage) are wholly-owned, with the remainder owned through joint ventures. The following terms are commonly used in our industry to describe products that we transport, store, distribute or otherwise handle through our petroleum pipelines and terminals: • refined products are the output from crude oil refineries that are primarily used as fuels by consumers. Refined products include gasoline, diesel fuel, aviation fuel, kerosene and heating oil. Diesel fuel, kerosene and heating oil are also referred to as distillates; • transmix is a mixture that forms when different refined products are transported in pipelines. Transmix is fractionated and blended into usable refined products; • liquefied petroleum gases, or LPGs, are liquids produced as by-products of the crude oil refining process and in connection with natural gas production. LPGs include butane and propane; • blendstocks are products 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; • crude oil , which includes condensate, is a naturally occurring unrefined petroleum product recovered from underground that is used as feedstock by refineries, splitters and petrochemical facilities; and • renewable fuels , such as ethanol, biodiesel and renewable diesel, are fuels derived from living materials and typically blended with other refined products as required by government mandates. We use the term petroleum products to describe any, or a combination, of the above-noted products. Basis of Presentation In the opinion of management, our accompanying consolidated financial statements which are unaudited, except for the consolidated balance sheet as of December 31, 2020, which is derived from our audited financial statements, include all normal and recurring adjustments necessary to present fairly our financial position as of March 31, 2021, the results of operations for the three months ended March 31, 2020 and 2021 and cash flows for the three months ended March 31, 2020 and 2021. The results of operations for the three months ended March 31, 2021 are not necessarily indicative of the results to be expected for the full year ending December 31, 2021 for several reasons. Profits from our gas liquids blending activities are realized largely during the first and fourth quarters of each year. Additionally, gasoline demand, which drives transportation volumes and revenues on our refined products pipeline system, generally trends higher during the summer driving months. Further, the volatility of commodity prices impacts the profits from our commodity activities and the volume of petroleum products we transport on our pipelines. Pursuant to the rules and regulations of the Securities and Exchange Commission, the financial statements in this report have been prepared in accordance with generally accepted accounting principles (“GAAP”) in the U.S. for interim financial information. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. These financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2020. Reclassifications Certain prior period amounts have been reclassified to conform with the current period’s presentation. Use of Estimates The preparation of our consolidated financial statements in conformity with 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. New Accounting Pronouncements None.

Segment Disclosures

Segment Disclosures	3 Months Ended
	Mar. 31, 2021
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 third-party customers, operating expenses, cost of product sales, other operating (income) expense 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 the nearest comparable GAAP financial measure, is included in the tables below (presented in thousands). Operating profit includes depreciation, amortization and impairment expense and general and administrative (“G&A”) expense that management does not consider when evaluating the core profitability of our separate operating segments. Three Months Ended March 31, 2020 Refined Products Crude Oil Intersegment Total Transportation and terminals revenue $ 314,319 $ 145,658 $ (1,582) $ 458,395 Product sales revenue 312,986 6,134 — 319,120 Affiliate management fee revenue 1,584 3,707 — 5,291 Total revenue 628,889 155,499 (1,582) 782,806 Operating expense 105,882 46,772 (3,146) 149,508 Cost of product sales 233,342 15,894 — 249,236 Other operating (income) expense (1,892) 2,403 — 511 Earnings of non-controlled entities (14,220) (29,440) — (43,660) Operating margin 305,777 119,870 1,564 427,211 Depreciation, amortization and impairment expense 46,059 15,911 1,564 63,534 G&A expense 26,654 10,254 — 36,908 Operating profit $ 233,064 $ 93,705 $ — $ 326,769 Three Months Ended March 31, 2021 Refined Products Crude Oil Intersegment Total Transportation and terminals revenue $ 310,768 $ 116,214 $ (1,812) $ 425,170 Product sales revenue 201,431 29,170 — 230,601 Affiliate management fee revenue 1,550 3,752 — 5,302 Total revenue 513,749 149,136 (1,812) 661,073 Operating expense 94,853 39,202 (3,451) 130,604 Cost of product sales 154,742 30,125 — 184,867 Other operating (income) expense (239) 701 — 462 Earnings of non-controlled entities (9,171) (29,881) — (39,052) Operating margin 273,564 108,989 1,639 384,192 Depreciation, amortization and impairment expense 39,585 16,904 1,639 58,128 G&A expense 33,583 12,997 — 46,580 Operating profit $ 200,396 $ 79,088 $ — $ 279,484

Revenue

Revenue	3 Months Ended
	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue	Revenue Statement of Income Disclosures The following tables provide details of our revenues disaggregated by key activities that comprise our performance obligations by operating segment (in thousands): Three Months Ended March 31, 2020 Refined Products Crude Oil Intersegment Eliminations Total Transportation $ 178,456 $ 86,782 $ — $ 265,238 Terminalling 40,386 3,309 — 43,695 Storage 55,075 29,183 (1,582) 82,676 Ancillary services 32,240 7,076 — 39,316 Lease revenue 8,162 19,308 — 27,470 Transportation and terminals revenue 314,319 145,658 (1,582) 458,395 Product sales revenue 312,986 6,134 — 319,120 Affiliate management fee revenue 1,584 3,707 — 5,291 Total revenue 628,889 155,499 (1,582) 782,806 Revenue not under the guidance of ASC 606, Revenue from Contracts with Customers: Lease revenue (1) (8,162) (19,308) — (27,470) (Gains) losses from futures contracts included in product sales revenue (2) (121,047) (2,722) — (123,769) Affiliate management fee revenue (1,584) (3,707) — (5,291) Total revenue from contracts with customers under ASC 606 $ 498,096 $ 129,762 $ (1,582) $ 626,276 (1) Lease revenue is accounted for under Accounting Standards Codification (“ASC”) 842, Leases . (2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging . Three Months Ended March 31, 2021 Refined Products Crude Oil Intersegment Eliminations Total Transportation $ 193,427 $ 55,046 $ — $ 248,473 Terminalling 32,791 6,117 — 38,908 Storage 49,157 29,262 (1,812) 76,607 Ancillary services 31,246 7,946 — 39,192 Lease revenue 4,147 17,843 — 21,990 Transportation and terminals revenue 310,768 116,214 (1,812) 425,170 Product sales revenue 201,431 29,170 — 230,601 Affiliate management fee revenue 1,550 3,752 — 5,302 Total revenue 513,749 149,136 (1,812) 661,073 Revenue not under the guidance of ASC 606, Revenue from Contracts with Customers: Lease revenue (1) (4,147) (17,843) — (21,990) (Gains) losses from futures contracts included in product sales revenue (2) 48,437 5,356 — 53,793 Affiliate management fee revenue (1,550) (3,752) — (5,302) Total revenue from contracts with customers under ASC 606 $ 556,489 $ 132,897 $ (1,812) $ 687,574 (1) Lease revenue is accounted for under ASC 842, Leases . (2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging . Balance Sheet Disclosures The following table summarizes our accounts receivable, contract assets and contract liabilities resulting from contracts with customers (in thousands): December 31, 2020 March 31, 2021 Accounts receivable from contracts with customers $ 108,843 $ 141,387 Contract assets $ 12,220 $ 11,429 Contract liabilities $ 102,964 $ 100,824 For the three months ended March 31, 2021, we recognized $66.4 million of transportation and terminals revenue that was recorded in deferred revenue as of December 31, 2020. Unfulfilled Performance Obligations The following table provides the aggregate amount of the transaction price allocated to our unfulfilled performance obligations (“UPOs”) as of March 31, 2021 by operating segment, including the range of years remaining on our contracts with customers and an estimate of revenues expected to be recognized over the next 12 months (dollars in thousands): Refined Products Crude Oil Total Balances at March 31, 2021 $ 2,047,797 $ 1,197,666 $ 3,245,463 Remaining terms 1 - 17 years 1 - 11 years Estimated revenues from UPOs to be recognized in the next 12 months $ 389,591 $ 260,319 $ 649,910

Investments in Non-Controlled E

Investments in Non-Controlled Entities	3 Months Ended
	Mar. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
Investments in Non-Controlled Entities	Investments in Non-Controlled Entities Our equity investments in non-controlled entities at March 31, 2021 were comprised of: Entity Ownership Interest BridgeTex Pipeline Company, LLC (“BridgeTex”) 30% Double Eagle Pipeline LLC (“Double Eagle”) 50% HoustonLink Pipeline Company, LLC (“HoustonLink”) 50% MVP Terminalling, LLC (“MVP”) (1) 50% Powder Springs Logistics, LLC (“Powder Springs”) 50% Saddlehorn Pipeline Company, LLC (“Saddlehorn”) 30% Seabrook Logistics, LLC (“Seabrook”) 50% Texas Frontera, LLC (“Texas Frontera”) 50% (1) Subsequent to March 31, 2021, we sold a portion of our interest in MVP (see Note 15 – Subsequent Events for further detail of this transaction). We serve as operator of BridgeTex, HoustonLink, MVP, Powder Springs, Saddlehorn, Texas Frontera and the pipeline activities of Seabrook. We receive fees for management services as well as reimbursement or payment to us for certain direct operational payroll and other overhead costs. The management fees we receive are reported as affiliate management fee revenue on our consolidated statements of income. Cost reimbursements we receive from these entities in connection with our operating services are included as reductions to costs and expenses on our consolidated statements of income and totaled $1.2 million and $0.5 million during the three months ended March 31, 2020 and 2021, respectively. We recorded the following revenue and expense transactions from certain of these non-controlled entities in our consolidated statements of income (in thousands): Three Months Ended March 31, 2020 2021 Transportation and terminals revenue: BridgeTex, pipeline capacity and storage $ 10,748 $ 10,740 Double Eagle, throughput revenue $ 1,600 $ 976 Saddlehorn, storage revenue $ 566 $ 580 Operating expenses: Seabrook, storage lease and ancillary services $ 6,899 $ 5,310 Other operating income: Seabrook, gain on sale of air emission credits $ 1,410 $ — Our consolidated balance sheets reflected the following balances related to transactions with our non-controlled entities (in thousands): December 31, 2020 Trade Accounts Receivable Other Accounts Receivable Other Accounts Payable Long-Term Receivables BridgeTex $ 355 $ 27 $ 970 $ — Double Eagle $ 277 $ — $ — $ — HoustonLink $ — $ — $ 144 $ — MVP $ — $ 467 $ 2,297 $ — Powder Springs $ — $ — $ — $ 10,223 Saddlehorn $ — $ 121 $ — $ — Seabrook $ — $ — $ 7,274 $ — March 31, 2021 Trade Accounts Receivable Other Accounts Receivable Other Accounts Payable Long-Term Receivables BridgeTex $ 263 $ 12 $ 1,308 $ — Double Eagle $ 310 $ — $ — $ — HoustonLink $ — $ — $ 149 $ — MVP $ — $ 633 $ 862 $ — Powder Springs $ 101 $ 96 $ — $ 10,293 Saddlehorn $ — $ 175 $ — $ — Seabrook $ — $ 105 $ 2,528 $ — We entered into a long-term terminalling and storage contract with Seabrook for exclusive use of dedicated tankage that provides our customers with crude oil storage capacity and dock access for crude oil imports and exports on the Texas Gulf Coast (see Note 7 – Leases for more details regarding this lease). The financial results from MVP, Powder Springs and Texas Frontera are included in our refined products segment and the financial results from BridgeTex, Double Eagle, HoustonLink, Saddlehorn and Seabrook are included in our crude oil segment, each as earnings of non-controlled entities. A summary of our investments in non-controlled entities (representing only our proportionate interest) follows (in thousands): Investments at December 31, 2020 $ 1,213,856 Additional investment 1,865 Earnings of non-controlled entities: Proportionate share of earnings 39,505 Amortization of excess investment and capitalized interest (453) Earnings of non-controlled entities 39,052 Less: Distributions from operations of non-controlled entities 51,434 Investments at March 31, 2021 $ 1,203,339

Inventory

Inventory	3 Months Ended
	Mar. 31, 2021
Inventory Disclosure [Abstract]
Inventory	Inventory Inventory at December 31, 2020 and March 31, 2021 was as follows (in thousands): December 31, 2020 March 31, Refined products $ 79,473 $ 94,098 Crude oil 32,431 47,993 Liquefied petroleum gases 26,734 20,926 Transmix 23,397 44,940 Additives 5,354 4,816 Total inventory $ 167,389 $ 212,773

Debt

Debt	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Debt	Debt Long-term debt at December 31, 2020 and March 31, 2021 was as follows (in thousands): December 31, March 31, Commercial paper $ — $ 17,000 3.20% Notes due 2025 250,000 250,000 5.00% Notes due 2026 650,000 650,000 3.25% Notes due 2030 500,000 500,000 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 500,000 500,000 4.20% Notes due 2047 500,000 500,000 4.85% Notes due 2049 500,000 500,000 3.95% Notes due 2050 800,000 800,000 Face value of long-term debt 5,000,000 5,017,000 Unamortized debt issuance costs (1) (40,143) (39,631) Net unamortized debt premium (1) 18,834 18,773 Long-term debt, net $ 4,978,691 $ 4,996,142 (1) Debt issuance costs and note discounts and premiums 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. Other Debt Revolving Credit Facility. At March 31, 2021, the total borrowing capacity under our revolving credit facility maturing in May 2024 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 0.875% to 1.500% based on our credit ratings. Additionally, an unused commitment fee is assessed at a rate from 0.075% and 0.200% depending on our credit ratings. The unused commitment fee was 0.125% at March 31, 2021. Borrowings under this facility may be used for general purposes, including capital expenditures. As of December 31, 2020 and March 31, 2021, there were no borrowings outstanding under this facility and $3.5 million was 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 this facility. 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. Commercial paper borrowings outstanding at March 31, 2021 were $17.0 million. The weighted-average interest rate for commercial paper borrowings based on the number of days outstanding was 0.2% for the three months ended March 31, 2021.

Leases

Leases	3 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Leases	Leases Operating Leases – Lessee Related-Party Operating Lease . We entered into a long-term terminalling and storage contract with Seabrook for exclusive use of dedicated tankage that provides our customers with crude oil storage capacity and dock access for crude oil imports and exports on the Texas Gulf Coast. The following tables provide information about our third-party and Seabrook operating leases (in thousands): Three Months Ended March 31, 2020 Three Months Ended March 31, 2021 Third-Party Leases Seabrook Lease All Leases Third-Party Leases Seabrook Lease All Leases Total lease expense $ 5,990 $ 6,899 $ 12,889 $ 7,021 $ 5,310 $ 12,331 December 31, 2020 March 31, 2021 Third-Party Leases Seabrook Lease All Leases Third-Party Leases Seabrook Lease All Leases Current lease liability $ 17,099 $ 10,434 $ 27,533 $ 17,257 $ 9,404 $ 26,661 Long-term lease liability $ 84,982 $ 52,501 $ 137,483 $ 118,291 $ 50,526 $ 168,817 Right-of-use asset $ 103,142 $ 62,936 $ 166,078 $ 134,533 $ 59,930 $ 194,463

Employee Benefit Plans

Employee Benefit Plans	3 Months Ended
	Mar. 31, 2021
Retirement Benefits [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 $4.5 million and $3.1 million for the three months ended March 31, 2020 and 2021, respectively. In addition, we sponsor two pension plans, including one for all non-union employees and one that covers union employees, and a postretirement benefit plan for certain employees. Net periodic benefit expense for the three months ended March 31, 2020 and 2021 was as follows (in thousands): Three Months Ended Three Months Ended March 31, 2020 March 31, 2021 Pension Other Postretirement Pension Other Postretirement Components of net periodic benefit costs: Service cost $ 7,203 $ 62 $ 7,353 $ 76 Interest cost 2,802 112 2,400 95 Expected return on plan assets (2,886) — (3,046) — Amortization of prior service credit (45) — (45) — Amortization of actuarial loss 1,412 119 1,544 147 Settlement cost 969 — — — Settlement gain on disposition of assets (1,342) — — — Net periodic benefit cost $ 8,113 $ 293 $ 8,206 $ 318 The service component of our net periodic benefit costs is presented in operating expense and G&A expense, and the non-service components are presented in other (income) expense in our consolidated statements of income. The changes in accumulated other comprehensive loss (“AOCL”) related to employee benefit plan assets and benefit obligations for the three months ended March 31, 2020 and 2021 were as follows (in thousands): Three Months Ended Three Months Ended March 31, 2020 March 31, 2021 Gains (Losses) Included in AOCL Pension Benefits Other Postretirement Benefits Pension Benefits Other Postretirement Benefits Beginning balance $ (104,739) $ (8,378) $ (117,782) $ (10,409) Net actuarial loss (747) — — — Curtailment gain 1,703 — — — Recognition of prior service credit amortization in income (45) — (45) — Recognition of actuarial loss amortization in income 1,412 119 1,544 147 Recognition of settlement cost in income 969 — — — Ending balance $ (101,447) $ (8,259) $ (116,283) $ (10,262) Contributions estimated to be paid into the plans in 2021 are $28.0 million and $0.2 million for the pension plans and other postretirement benefit plan, respectively.

Long-Term Incentive Plan

Long-Term Incentive Plan	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Long-Term Incentive Plan	Long-Term Incentive Plan The compensation committee of our general partner’s board of directors administers our long-term incentive plan (“LTIP”) covering certain of our employees and the independent directors of our general partner. The LTIP primarily consists of phantom units and permits the grant of awards covering an aggregate payout of 11.9 million of our common units. The estimated units remaining available under the LTIP at March 31, 2021 totaled approximately 0.6 million. Equity-based incentive compensation expense for the three months ended March 31, 2020 and 2021, primarily recorded as G&A expense on our consolidated statements of income, was as follows (in thousands): Three Months Ended March 31, 2020 2021 Performance-based awards $ (1,947) $ 2,216 Time-based awards 2,102 2,463 Total $ 155 $ 4,679 During 2020, LTIP expense related to performance-based awards was reduced due to the impacts of COVID-19 and the significant decline in commodity prices on our financial results. On February 5, 2021, 558,516 unit awards were granted pursuant to our LTIP. These awards included both performance-based and time-based awards and have a three-year vesting period that will end on December 31, 2023. Basic and Diluted Net Income Per Common Unit The difference between our actual common units outstanding and our weighted-average number of common units outstanding used to calculate basic net income per unit is due to the impact of: (i) the unit awards issued to non-employee directors and (ii) the weighted average effect of units actually issued or repurchased during a period. The difference between the weighted-average number of common units outstanding used for basic and diluted net income per unit calculations on our consolidated statements of income is primarily due to the dilutive effect of unit awards associated with our LTIP that have not yet vested.

Derivative Financial Instrument

Derivative Financial Instruments	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments Commodity Derivatives Our open futures contracts at March 31, 2021 were as follows: Type of Contract/Accounting Methodology Product Represented by the Contract and Associated Barrels Maturity Dates Futures - Economic Hedges 3.0 million barrels of refined products and crude oil Between April 2021 and November 2022 Futures - Economic Hedges 0.2 million barrels of gas liquids Between April and December 2021 Commodity Derivatives Contracts and Deposits Offsets At December 31, 2020 and March 31, 2021, we had made margin deposits of $34.2 million and $40.0 million, respectively, for our futures contracts with our counterparties, which were recorded as current assets under 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, 2020 and March 31, 2021 (in thousands): 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 (1) As of 12/31/2020 $ (22,988) $ 1,690 $ (21,298) $ 34,165 $ 12,867 As of 3/31/2021 $ (24,099) $ 2,626 $ (21,473) $ 40,029 $ 18,556 (1) Amount represents the maximum loss we would incur if all of our counterparties failed to perform on their derivative contracts. Basis Derivative Agreement During 2019, we entered into a basis derivative agreement with a joint venture co-owner’s affiliate, and, contemporaneously, that affiliate entered into an intrastate transportation services agreement with the joint venture. Settlements under the basis derivative agreement are determined based on the basis differential of crude oil prices at different market locations and a notional volume of 30,000 barrels per day. As a result, we account for this agreement as a derivative. The agreement will expire in early 2022. We recognize the changes in fair value of this agreement based on forward price curves for crude oil in West Texas and the Houston Gulf Coast in other operating income (expense) in our consolidated statements of income. The liability for this agreement at December 31, 2020 and March 31, 2021 was $10.2 million and $7.3 million, respectively. Impact of Derivatives on Our Financial Statements Comprehensive Income The changes in derivative activity included in AOCL for the three months ended March 31, 2020 and 2021 were as follows (in thousands): Three Months Ended March 31, Derivative Losses Included in AOCL 2020 2021 Beginning balance $ (48,960) $ (54,999) Net loss on cash flow hedges (11,914) — Reclassification of net loss on cash flow hedges to income 809 887 Ending balance $ (60,065) $ (54,112) The following is a summary of the effect on our consolidated statements of income for the three months ended March 31, 2020 and 2021 of derivatives that were designated as cash flow hedges (in thousands): Interest Rate Contracts Amount of Loss Recognized in AOCL on Derivatives Location of Loss Reclassified from AOCL into Income Amount of Loss Reclassified from AOCL into Income Three Months Ended March 31, 2020 $ (11,914) Interest expense $ (809) Three Months Ended March 31, 2021 $ — Interest expense $ (887) As of March 31, 2021, the net loss estimated to be classified to interest expense over the next twelve months from AOCL is approximately $3.5 million. This amount relates to the amortization of losses on interest rate contracts over the life of the related debt instruments. The following table provides a summary of the effect on our consolidated statements of income for the three months ended March 31, 2020 and 2021 of derivatives that were not designated as hedging instruments (in thousands): Amount of Gain (Loss) Recognized on Derivatives Three Months Ended Location of Gain (Loss) March 31, Derivative Instrument 2020 2021 Futures contracts Product sales revenue $ 123,769 $ (53,793) Futures contracts Cost of product sales (3,927) 1,670 Basis derivative agreement Other operating income (expense) (2,899) (650) Total $ 116,943 $ (52,773) 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 , which are presented on a net basis in our consolidated balance sheets, that were not designated as hedging instruments as of December 31, 2020 and March 31, 2021 (in thousands): December 31, 2020 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Commodity derivatives contracts, net $ 616 Commodity derivatives contracts, net $ 22,988 Future contracts Other noncurrent assets 1,074 Other noncurrent liabilities — Basis derivative agreement Other current assets — Other current liabilities 8,774 Basis derivative agreement Other noncurrent assets — Other noncurrent liabilities 1,468 Total $ 1,690 Total $ 33,230 March 31, 2021 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Commodity derivatives contracts, net $ 2,626 Commodity derivatives contracts, net $ 23,418 Futures contracts Other noncurrent assets — Other noncurrent liabilities 681 Basis derivative agreement Other current assets — Other current liabilities 7,341 Total $ 2,626 Total $ 31,440

Fair Value

Fair Value	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value	Fair Value Fair Value Methods and Assumptions - Financial Assets and Liabilities We used the following methods and assumptions in estimating fair value of our financial assets and liabilities: • 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 10 – Derivative Financial Instruments for further disclosures regarding these contracts. • Basis derivative agreement. During 2019, we entered into a basis derivative agreement with a joint venture co-owner’s affiliate, and, contemporaneously, that affiliate entered into an intrastate transportation services agreement with the joint venture. Settlements under the basis derivative agreement are determined based on the basis differential of crude oil prices at different market locations and a notional volume of 30,000 barrels per day (see Note 10 - Derivative Financial Instruments for further disclosures regarding this agreement). The fair value of this derivative was calculated based on observable market data inputs, including published commodity pricing data and market interest rates. The key inputs in the fair value calculation include the forward price curves for crude oil, the implied forward correlation in crude oil prices between West Texas and the Houston Gulf Coast, and the implied forward volatility for crude oil futures contracts. • Long-term receivables. These primarily include payments receivable under a sales-type 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. • Guarantees and contractual obligations. At March 31, 2021, these primarily include a long-term contractual obligation we entered into in connection with the sale of three marine terminals to a subsidiary of Buckeye Partners, L.P. (“Buckeye”). This obligation requires us to perform certain environmental remediation work on Buckeye’s behalf at the New Haven, Connecticut terminal. The contractual obligation was recorded at fair value on our consolidated balance sheets upon initial recognition and was calculated using our best estimate of potential outcome scenarios to determine our liability for the remediation costs required in this agreement. • Debt. The fair value of our publicly traded notes was based on the prices of those notes at December 31, 2020 and March 31, 2021; 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, 2020 and March 31, 2021 based on the three levels established by ASC 820, Fair Value Measurements and Disclosures (in thousands): Assets (Liabilities) Fair Value Measurements as of Carrying Amount Fair Value Quoted Prices in Active Markets Significant Significant Commodity derivatives contracts $ (21,298) $ (21,298) $ (21,298) $ — $ — Basis derivative agreement $ (10,242) $ (10,242) $ — $ (10,242) Long-term receivables $ 22,755 $ 22,755 $ — $ — $ 22,755 Guarantees and contractual obligations $ (11,207) $ (11,207) $ — $ — $ (11,207) Debt $ (4,978,691) $ (5,880,850) $ — $ (5,880,850) $ — Assets (Liabilities) Fair Value Measurements as of Carrying Amount Fair Value Quoted Prices in Active Markets Significant Significant Commodity derivatives contracts $ (21,473) $ (21,473) $ (21,473) $ — $ — Basis derivative agreement $ (7,341) $ (7,341) $ — $ (7,341) $ — Long-term receivables $ 21,590 $ 21,590 $ — $ — $ 21,590 Guarantees and contractual obligations $ (11,172) $ (11,172) $ — $ — $ (11,172) Debt $ (4,996,142) $ (5,341,424) $ — $ (5,341,424) $ —

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Butane Blending Patent Infringement Proceeding On October 4, 2017, Sunoco Partners Marketing & Terminals L.P. (“Sunoco”) brought an action for patent infringement in the U.S. District Court for the District of Delaware alleging Magellan Midstream Partners, L.P. (“Magellan”) and Powder Springs Logistics, LLC (“Powder Springs”) have infringed patents related to butane blending at the Powder Springs facility located in Powder Springs, Georgia. Sunoco subsequently submitted pleadings alleging that Magellan is also infringing various patents related to butane blending at nine Magellan facilities, in addition to Powder Springs. Sunoco is seeking monetary damages, attorneys’ fees and a permanent injunction enjoining Magellan and Powder Springs from infringing the subject patents. We deny and are vigorously defending against all claims asserted by Sunoco. Although it is not possible to predict the ultimate outcome, we believe the ultimate resolution of this matter will not have a material adverse impact on our results of operations, financial position or cash flows. Environmental Liabilities Liabilities recognized for estimated environmental costs were $14.3 million and $12.7 million at December 31, 2020 and March 31, 2021, respectively. We have classified environmental liabilities as other 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 expense on our consolidated statements of income. Environmental expenses were $0.4 million and $1.1 million for the three months ended March 31, 2020 and 2021, respectively. Other In first quarter 2020, we entered into a long-term contractual obligation in connection with the sale of three marine terminals to Buckeye. This obligation requires us to perform certain environmental remediation work on Buckeye’s behalf at the New Haven terminal. At December 31, 2020 and March 31, 2021, our consolidated balance sheets reflect a current liability of $0.6 million and a noncurrent liability of $10.2 million to reflect the fair value of this obligation. We have entered into an agreement to guarantee our 50% pro rata share, up to $25.0 million, of obligations under the Powder Springs’ credit facility. As of March 31, 2021, our consolidated balance sheets reflected a $0.4 million other current liability and a corresponding increase in our investment in non-controlled entities on our consolidated balance sheets to reflect the fair value of this guarantee.

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2021
Related Party Transactions [Abstract]
Related Party Transactions	Related Party TransactionsStacy Methvin is an independent member of our general partner’s board of directors and also serves as a director of two of our customers. We received tariff, terminalling and other ancillary revenue from these customers of $8.4 million and $11.3 million for the three months ended March 31, 2020 and 2021, respectively. We occasionally have transmix settlements with these customers as well. We recorded receivables of $3.9 million and $4.0 million from these customers at December 31, 2020 and March 31, 2021, respectively. See Note 4 – Investments in Non-Controlled Entities and Note 7 – Leases

Partners' Capital and Distribut

Partners' Capital and Distributions	3 Months Ended
	Mar. 31, 2021
Partners' Capital Notes [Abstract]
Partners' Capital and Distributions	Partners’ Capital and Distributions Partners ’ Capital Our general partner’s board of directors authorized the repurchase of up to $750 million of our common units through 2022. The timing, price and actual number of common units repurchased will depend on a number of factors including our expected expansion capital spending needs, excess cash available, balance sheet metrics, legal and regulatory requirements, market conditions and the trading price of our common units. The repurchase program does not obligate us to acquire any particular amount of common units, and the repurchase program may be suspended or discontinued at any time. No units were repurchased during the three months ended March 31, 2021. The following table details the changes in the number of our common units outstanding from December 31, 2020 through March 31, 2021: Common units outstanding on December 31, 2020 223,119,811 January 2021–Settlement of employee LTIP awards 150,435 During 2021–Other (a) 12,572 Common units outstanding on March 31, 2021 223,282,818 (a) Common units issued to settle the equity-based retainers paid to independent directors of our general partner. Distributions Distributions we paid during 2020 and 2021 were as follows (in thousands, except per unit amounts): Payment Date Per Unit Total Distribution 02/14/2020 $ 1.0275 $ 234,774 05/15/2020 1.0275 231,245 08/14/2020 1.0275 231,245 11/13/2020 1.0275 229,853 Total 4.1100 927,117 02/12/2021 $ 1.0275 229,423 05/14/2021 (a) 1.0275 229,423 Total $ 2.0550 $ 458,846

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Recognizable events No recognizable events occurred subsequent to March 31, 2021. Non-recognizable events Sale of Partial Interest in MVP. In April 2021, we sold nearly half of our membership interest in MVP and received $271.0 million in cash, including working capital adjustments. Following the sale, we own approximately 25% of MVP and remain the operator of the facility.

Organization, Description of _2

Organization, Description of Business And Basis Of Presentation (Policies)	3 Months Ended
	Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation In the opinion of management, our accompanying consolidated financial statements which are unaudited, except for the consolidated balance sheet as of December 31, 2020, which is derived from our audited financial statements, include all normal and recurring adjustments necessary to present fairly our financial position as of March 31, 2021, the results of operations for the three months ended March 31, 2020 and 2021 and cash flows for the three months ended March 31, 2020 and 2021. The results of operations for the three months ended March 31, 2021 are not necessarily indicative of the results to be expected for the full year ending December 31, 2021 for several reasons. Profits from our gas liquids blending activities are realized largely during the first and fourth quarters of each year. Additionally, gasoline demand, which drives transportation volumes and revenues on our refined products pipeline system, generally trends higher during the summer driving months. Further, the volatility of commodity prices impacts the profits from our commodity activities and the volume of petroleum products we transport on our pipelines. Pursuant to the rules and regulations of the Securities and Exchange Commission, the financial statements in this report have been prepared in accordance with generally accepted accounting principles (“GAAP”) in the U.S. for interim financial information. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. These financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2020.
Use of Estimates	Use of Estimates The preparation of our consolidated financial statements in conformity with 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.
New Accounting Pronouncements	New Accounting Pronouncements None.

Segment Disclosures (Tables)

Segment Disclosures (Tables)	3 Months Ended
	Mar. 31, 2021
Segment Reporting [Abstract]
Schedule of Business Segment Reporting Information	Three Months Ended March 31, 2020 Refined Products Crude Oil Intersegment Total Transportation and terminals revenue $ 314,319 $ 145,658 $ (1,582) $ 458,395 Product sales revenue 312,986 6,134 — 319,120 Affiliate management fee revenue 1,584 3,707 — 5,291 Total revenue 628,889 155,499 (1,582) 782,806 Operating expense 105,882 46,772 (3,146) 149,508 Cost of product sales 233,342 15,894 — 249,236 Other operating (income) expense (1,892) 2,403 — 511 Earnings of non-controlled entities (14,220) (29,440) — (43,660) Operating margin 305,777 119,870 1,564 427,211 Depreciation, amortization and impairment expense 46,059 15,911 1,564 63,534 G&A expense 26,654 10,254 — 36,908 Operating profit $ 233,064 $ 93,705 $ — $ 326,769 Three Months Ended March 31, 2021 Refined Products Crude Oil Intersegment Total Transportation and terminals revenue $ 310,768 $ 116,214 $ (1,812) $ 425,170 Product sales revenue 201,431 29,170 — 230,601 Affiliate management fee revenue 1,550 3,752 — 5,302 Total revenue 513,749 149,136 (1,812) 661,073 Operating expense 94,853 39,202 (3,451) 130,604 Cost of product sales 154,742 30,125 — 184,867 Other operating (income) expense (239) 701 — 462 Earnings of non-controlled entities (9,171) (29,881) — (39,052) Operating margin 273,564 108,989 1,639 384,192 Depreciation, amortization and impairment expense 39,585 16,904 1,639 58,128 G&A expense 33,583 12,997 — 46,580 Operating profit $ 200,396 $ 79,088 $ — $ 279,484

Revenue (Tables)

Revenue (Tables)	3 Months Ended
	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue from External Customers by Products and Services	The following tables provide details of our revenues disaggregated by key activities that comprise our performance obligations by operating segment (in thousands): Three Months Ended March 31, 2020 Refined Products Crude Oil Intersegment Eliminations Total Transportation $ 178,456 $ 86,782 $ — $ 265,238 Terminalling 40,386 3,309 — 43,695 Storage 55,075 29,183 (1,582) 82,676 Ancillary services 32,240 7,076 — 39,316 Lease revenue 8,162 19,308 — 27,470 Transportation and terminals revenue 314,319 145,658 (1,582) 458,395 Product sales revenue 312,986 6,134 — 319,120 Affiliate management fee revenue 1,584 3,707 — 5,291 Total revenue 628,889 155,499 (1,582) 782,806 Revenue not under the guidance of ASC 606, Revenue from Contracts with Customers: Lease revenue (1) (8,162) (19,308) — (27,470) (Gains) losses from futures contracts included in product sales revenue (2) (121,047) (2,722) — (123,769) Affiliate management fee revenue (1,584) (3,707) — (5,291) Total revenue from contracts with customers under ASC 606 $ 498,096 $ 129,762 $ (1,582) $ 626,276 (1) Lease revenue is accounted for under Accounting Standards Codification (“ASC”) 842, Leases . (2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging . Three Months Ended March 31, 2021 Refined Products Crude Oil Intersegment Eliminations Total Transportation $ 193,427 $ 55,046 $ — $ 248,473 Terminalling 32,791 6,117 — 38,908 Storage 49,157 29,262 (1,812) 76,607 Ancillary services 31,246 7,946 — 39,192 Lease revenue 4,147 17,843 — 21,990 Transportation and terminals revenue 310,768 116,214 (1,812) 425,170 Product sales revenue 201,431 29,170 — 230,601 Affiliate management fee revenue 1,550 3,752 — 5,302 Total revenue 513,749 149,136 (1,812) 661,073 Revenue not under the guidance of ASC 606, Revenue from Contracts with Customers: Lease revenue (1) (4,147) (17,843) — (21,990) (Gains) losses from futures contracts included in product sales revenue (2) 48,437 5,356 — 53,793 Affiliate management fee revenue (1,550) (3,752) — (5,302) Total revenue from contracts with customers under ASC 606 $ 556,489 $ 132,897 $ (1,812) $ 687,574 (1) Lease revenue is accounted for under ASC 842, Leases . (2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging .
Contract with Customer, Asset and Liability	The following table summarizes our accounts receivable, contract assets and contract liabilities resulting from contracts with customers (in thousands): December 31, 2020 March 31, 2021 Accounts receivable from contracts with customers $ 108,843 $ 141,387 Contract assets $ 12,220 $ 11,429 Contract liabilities $ 102,964 $ 100,824
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction	The following table provides the aggregate amount of the transaction price allocated to our unfulfilled performance obligations (“UPOs”) as of March 31, 2021 by operating segment, including the range of years remaining on our contracts with customers and an estimate of revenues expected to be recognized over the next 12 months (dollars in thousands): Refined Products Crude Oil Total Balances at March 31, 2021 $ 2,047,797 $ 1,197,666 $ 3,245,463 Remaining terms 1 - 17 years 1 - 11 years Estimated revenues from UPOs to be recognized in the next 12 months $ 389,591 $ 260,319 $ 649,910

Investments in Non-Controlled_2

Investments in Non-Controlled Entities (Tables)	3 Months Ended
	Mar. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Our equity investments in non-controlled entities at March 31, 2021 were comprised of: Entity Ownership Interest BridgeTex Pipeline Company, LLC (“BridgeTex”) 30% Double Eagle Pipeline LLC (“Double Eagle”) 50% HoustonLink Pipeline Company, LLC (“HoustonLink”) 50% MVP Terminalling, LLC (“MVP”) (1) 50% Powder Springs Logistics, LLC (“Powder Springs”) 50% Saddlehorn Pipeline Company, LLC (“Saddlehorn”) 30% Seabrook Logistics, LLC (“Seabrook”) 50% Texas Frontera, LLC (“Texas Frontera”) 50% (1) Subsequent to March 31, 2021, we sold a portion of our interest in MVP (see Note 15 – Subsequent Events for further detail of this transaction). We recorded the following revenue and expense transactions from certain of these non-controlled entities in our consolidated statements of income (in thousands): Three Months Ended March 31, 2020 2021 Transportation and terminals revenue: BridgeTex, pipeline capacity and storage $ 10,748 $ 10,740 Double Eagle, throughput revenue $ 1,600 $ 976 Saddlehorn, storage revenue $ 566 $ 580 Operating expenses: Seabrook, storage lease and ancillary services $ 6,899 $ 5,310 Other operating income: Seabrook, gain on sale of air emission credits $ 1,410 $ — Our consolidated balance sheets reflected the following balances related to transactions with our non-controlled entities (in thousands): December 31, 2020 Trade Accounts Receivable Other Accounts Receivable Other Accounts Payable Long-Term Receivables BridgeTex $ 355 $ 27 $ 970 $ — Double Eagle $ 277 $ — $ — $ — HoustonLink $ — $ — $ 144 $ — MVP $ — $ 467 $ 2,297 $ — Powder Springs $ — $ — $ — $ 10,223 Saddlehorn $ — $ 121 $ — $ — Seabrook $ — $ — $ 7,274 $ — March 31, 2021 Trade Accounts Receivable Other Accounts Receivable Other Accounts Payable Long-Term Receivables BridgeTex $ 263 $ 12 $ 1,308 $ — Double Eagle $ 310 $ — $ — $ — HoustonLink $ — $ — $ 149 $ — MVP $ — $ 633 $ 862 $ — Powder Springs $ 101 $ 96 $ — $ 10,293 Saddlehorn $ — $ 175 $ — $ — Seabrook $ — $ 105 $ 2,528 $ — A summary of our investments in non-controlled entities (representing only our proportionate interest) follows (in thousands): Investments at December 31, 2020 $ 1,213,856 Additional investment 1,865 Earnings of non-controlled entities: Proportionate share of earnings 39,505 Amortization of excess investment and capitalized interest (453) Earnings of non-controlled entities 39,052 Less: Distributions from operations of non-controlled entities 51,434 Investments at March 31, 2021 $ 1,203,339

Inventory (Tables)

Inventory (Tables)	3 Months Ended
	Mar. 31, 2021
Inventory Disclosure [Abstract]
Schedule of Inventory	Inventory at December 31, 2020 and March 31, 2021 was as follows (in thousands): December 31, 2020 March 31, Refined products $ 79,473 $ 94,098 Crude oil 32,431 47,993 Liquefied petroleum gases 26,734 20,926 Transmix 23,397 44,940 Additives 5,354 4,816 Total inventory $ 167,389 $ 212,773

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2021
Debt Disclosure [Abstract]
Consolidated Debt	Long-term debt at December 31, 2020 and March 31, 2021 was as follows (in thousands): December 31, March 31, Commercial paper $ — $ 17,000 3.20% Notes due 2025 250,000 250,000 5.00% Notes due 2026 650,000 650,000 3.25% Notes due 2030 500,000 500,000 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 500,000 500,000 4.20% Notes due 2047 500,000 500,000 4.85% Notes due 2049 500,000 500,000 3.95% Notes due 2050 800,000 800,000 Face value of long-term debt 5,000,000 5,017,000 Unamortized debt issuance costs (1) (40,143) (39,631) Net unamortized debt premium (1) 18,834 18,773 Long-term debt, net $ 4,978,691 $ 4,996,142 (1) Debt issuance costs and note discounts and premiums are being amortized or accreted to the applicable notes over the respective lives of those notes.

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Operating Leases	The following tables provide information about our third-party and Seabrook operating leases (in thousands): Three Months Ended March 31, 2020 Three Months Ended March 31, 2021 Third-Party Leases Seabrook Lease All Leases Third-Party Leases Seabrook Lease All Leases Total lease expense $ 5,990 $ 6,899 $ 12,889 $ 7,021 $ 5,310 $ 12,331 December 31, 2020 March 31, 2021 Third-Party Leases Seabrook Lease All Leases Third-Party Leases Seabrook Lease All Leases Current lease liability $ 17,099 $ 10,434 $ 27,533 $ 17,257 $ 9,404 $ 26,661 Long-term lease liability $ 84,982 $ 52,501 $ 137,483 $ 118,291 $ 50,526 $ 168,817 Right-of-use asset $ 103,142 $ 62,936 $ 166,078 $ 134,533 $ 59,930 $ 194,463

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	3 Months Ended
	Mar. 31, 2021
Retirement Benefits [Abstract]
Schedule of Consolidated Net Periodic Benefit Costs	Net periodic benefit expense for the three months ended March 31, 2020 and 2021 was as follows (in thousands): Three Months Ended Three Months Ended March 31, 2020 March 31, 2021 Pension Other Postretirement Pension Other Postretirement Components of net periodic benefit costs: Service cost $ 7,203 $ 62 $ 7,353 $ 76 Interest cost 2,802 112 2,400 95 Expected return on plan assets (2,886) — (3,046) — Amortization of prior service credit (45) — (45) — Amortization of actuarial loss 1,412 119 1,544 147 Settlement cost 969 — — — Settlement gain on disposition of assets (1,342) — — — Net periodic benefit cost $ 8,113 $ 293 $ 8,206 $ 318
Schedule of Amounts Recognized in Other Comprehensive Loss	The changes in accumulated other comprehensive loss (“AOCL”) related to employee benefit plan assets and benefit obligations for the three months ended March 31, 2020 and 2021 were as follows (in thousands): Three Months Ended Three Months Ended March 31, 2020 March 31, 2021 Gains (Losses) Included in AOCL Pension Benefits Other Postretirement Benefits Pension Benefits Other Postretirement Benefits Beginning balance $ (104,739) $ (8,378) $ (117,782) $ (10,409) Net actuarial loss (747) — — — Curtailment gain 1,703 — — — Recognition of prior service credit amortization in income (45) — (45) — Recognition of actuarial loss amortization in income 1,412 119 1,544 147 Recognition of settlement cost in income 969 — — — Ending balance $ (101,447) $ (8,259) $ (116,283) $ (10,262)

Long-Term Incentive Plan (Table

Long-Term Incentive Plan (Tables)	3 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Equity-Based Incentive Compensation Expense	Equity-based incentive compensation expense for the three months ended March 31, 2020 and 2021, primarily recorded as G&A expense on our consolidated statements of income, was as follows (in thousands): Three Months Ended March 31, 2020 2021 Performance-based awards $ (1,947) $ 2,216 Time-based awards 2,102 2,463 Total $ 155 $ 4,679

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule Of NYMEX Contracts And Butane Price Swap Purchase Agreements	Our open futures contracts at March 31, 2021 were as follows: Type of Contract/Accounting Methodology Product Represented by the Contract and Associated Barrels Maturity Dates Futures - Economic Hedges 3.0 million barrels of refined products and crude oil Between April 2021 and November 2022 Futures - Economic Hedges 0.2 million barrels of gas liquids Between April and December 2021
Derivatives and Offset Amounts	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, 2020 and March 31, 2021 (in thousands): 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 (1) As of 12/31/2020 $ (22,988) $ 1,690 $ (21,298) $ 34,165 $ 12,867 As of 3/31/2021 $ (24,099) $ 2,626 $ (21,473) $ 40,029 $ 18,556 (1) Amount represents the maximum loss we would incur if all of our counterparties failed to perform on their derivative contracts.
Derivatives and Hedging-Cash Flow Hedges	The changes in derivative activity included in AOCL for the three months ended March 31, 2020 and 2021 were as follows (in thousands): Three Months Ended March 31, Derivative Losses Included in AOCL 2020 2021 Beginning balance $ (48,960) $ (54,999) Net loss on cash flow hedges (11,914) — Reclassification of net loss on cash flow hedges to income 809 887 Ending balance $ (60,065) $ (54,112) The following is a summary of the effect on our consolidated statements of income for the three months ended March 31, 2020 and 2021 of derivatives that were designated as cash flow hedges (in thousands): Interest Rate Contracts Amount of Loss Recognized in AOCL on Derivatives Location of Loss Reclassified from AOCL into Income Amount of Loss Reclassified from AOCL into Income Three Months Ended March 31, 2020 $ (11,914) Interest expense $ (809) Three Months Ended March 31, 2021 $ — Interest expense $ (887)
Derivatives and Hedging-Overall-Subsequent Measurement	The following table provides a summary of the effect on our consolidated statements of income for the three months ended March 31, 2020 and 2021 of derivatives that were not designated as hedging instruments (in thousands): Amount of Gain (Loss) Recognized on Derivatives Three Months Ended Location of Gain (Loss) March 31, Derivative Instrument 2020 2021 Futures contracts Product sales revenue $ 123,769 $ (53,793) Futures contracts Cost of product sales (3,927) 1,670 Basis derivative agreement Other operating income (expense) (2,899) (650) Total $ 116,943 $ (52,773)
Derivatives and Hedging-Designated	The following tables provide a summary of the fair value of derivatives , which are presented on a net basis in our consolidated balance sheets, that were not designated as hedging instruments as of December 31, 2020 and March 31, 2021 (in thousands): December 31, 2020 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Commodity derivatives contracts, net $ 616 Commodity derivatives contracts, net $ 22,988 Future contracts Other noncurrent assets 1,074 Other noncurrent liabilities — Basis derivative agreement Other current assets — Other current liabilities 8,774 Basis derivative agreement Other noncurrent assets — Other noncurrent liabilities 1,468 Total $ 1,690 Total $ 33,230 March 31, 2021 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Commodity derivatives contracts, net $ 2,626 Commodity derivatives contracts, net $ 23,418 Futures contracts Other noncurrent assets — Other noncurrent liabilities 681 Basis derivative agreement Other current assets — Other current liabilities 7,341 Total $ 2,626 Total $ 31,440

Fair Value (Tables)

Fair Value (Tables)	3 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following tables summarize the carrying amounts, fair values and fair value measurements recorded or disclosed as of December 31, 2020 and March 31, 2021 based on the three levels established by ASC 820, Fair Value Measurements and Disclosures (in thousands): Assets (Liabilities) Fair Value Measurements as of Carrying Amount Fair Value Quoted Prices in Active Markets Significant Significant Commodity derivatives contracts $ (21,298) $ (21,298) $ (21,298) $ — $ — Basis derivative agreement $ (10,242) $ (10,242) $ — $ (10,242) Long-term receivables $ 22,755 $ 22,755 $ — $ — $ 22,755 Guarantees and contractual obligations $ (11,207) $ (11,207) $ — $ — $ (11,207) Debt $ (4,978,691) $ (5,880,850) $ — $ (5,880,850) $ — Assets (Liabilities) Fair Value Measurements as of Carrying Amount Fair Value Quoted Prices in Active Markets Significant Significant Commodity derivatives contracts $ (21,473) $ (21,473) $ (21,473) $ — $ — Basis derivative agreement $ (7,341) $ (7,341) $ — $ (7,341) $ — Long-term receivables $ 21,590 $ 21,590 $ — $ — $ 21,590 Guarantees and contractual obligations $ (11,172) $ (11,172) $ — $ — $ (11,172) Debt $ (4,996,142) $ (5,341,424) $ — $ (5,341,424) $ —

Partners' Capital and Distrib_2

Partners' Capital and Distributions (Tables)	3 Months Ended
	Mar. 31, 2021
Partners' Capital Notes [Abstract]
Schedule of Capital Units	The following table details the changes in the number of our common units outstanding from December 31, 2020 through March 31, 2021: Common units outstanding on December 31, 2020 223,119,811 January 2021–Settlement of employee LTIP awards 150,435 During 2021–Other (a) 12,572 Common units outstanding on March 31, 2021 223,282,818 (a) Common units issued to settle the equity-based retainers paid to independent directors of our general partner.
Schedule of Distributions	Distributions we paid during 2020 and 2021 were as follows (in thousands, except per unit amounts): Payment Date Per Unit Total Distribution 02/14/2020 $ 1.0275 $ 234,774 05/15/2020 1.0275 231,245 08/14/2020 1.0275 231,245 11/13/2020 1.0275 229,853 Total 4.1100 927,117 02/12/2021 $ 1.0275 229,423 05/14/2021 (a) 1.0275 229,423 Total $ 2.0550 $ 458,846

Organization, Description of _3

Organization, Description of Business and Basis of Presentation (Narrative) (Details) bbl in Millions	Mar. 31, 2021bblTerminalmi
Refined Products Segment [Member]
Organization and Description of Business [Line Items]
Pipeline Length | mi	9,800
Number of Pipeline Terminals | Terminal	54
Number of Independent Terminals | Terminal	25
Number of Marine Terminals | Terminal	2
Number Of Marine Terminals, Owned Through Joint Venture | Terminal	1
Crude Oil Pipeline and Terminals Segment [Member]
Organization and Description of Business [Line Items]
Pipeline Length | mi	2,200
Storage Capacity | bbl	37
Contracted Storage | bbl	27
Pipeline, Length - Wholly Owned | mi	1,000
Storage Capacity - Wholly Owned | bbl	30
Contracted Storage - Wholly Owned | bbl	24

Segment Disclosures (Schedule O

Segment Disclosures (Schedule Of Business Segment Reporting Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 661,073	$ 782,806
Operating expense	130,604	149,508
Cost of product sales	184,867	249,236
Other operating (income) expense	462	511
Earnings of non-controlled entities	(39,052)	(43,660)
Operating margin	384,192	427,211
Depreciation, amortization and impairment	58,128	63,534
G&A expense	46,580	36,908
Operating profit	279,484	326,769
Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	513,749	628,889
Operating expense	94,853	105,882
Cost of product sales	154,742	233,342
Other operating (income) expense	(239)	(1,892)
Earnings of non-controlled entities	(9,171)	(14,220)
Operating margin	273,564	305,777
Depreciation, amortization and impairment	39,585	46,059
G&A expense	33,583	26,654
Operating profit	200,396	233,064
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	149,136	155,499
Operating expense	39,202	46,772
Cost of product sales	30,125	15,894
Other operating (income) expense	701	2,403
Earnings of non-controlled entities	(29,881)	(29,440)
Operating margin	108,989	119,870
Depreciation, amortization and impairment	16,904	15,911
G&A expense	12,997	10,254
Operating profit	79,088	93,705
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(1,812)	(1,582)
Operating expense	(3,451)	(3,146)
Cost of product sales	0	0
Other operating (income) expense	0	0
Earnings of non-controlled entities	0	0
Operating margin	1,639	1,564
Depreciation, amortization and impairment	1,639	1,564
G&A expense	0	0
Operating profit	0	0
Service [Member]
Segment Reporting Information [Line Items]
Revenues	425,170	458,395
Service [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	310,768	314,319
Service [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	116,214	145,658
Service [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(1,812)	(1,582)
Product [Member]
Segment Reporting Information [Line Items]
Revenues	230,601	319,120
Product [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	201,431	312,986
Product [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	29,170	6,134
Product [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	0	0
Product and Service, Other [Member]
Segment Reporting Information [Line Items]
Revenues	5,302	5,291
Product and Service, Other [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,550	1,584
Product and Service, Other [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	3,752	3,707
Product and Service, Other [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	$ 0	$ 0

Revenue (Narrative) (Details)

Revenue (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021USD ($)
Revenue from Contract with Customer [Abstract]
Deferred Revenue, Revenue Recognized	$ 66.4

Revenue (Disaggregation of Reve

Revenue (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 661,073	$ 782,806
Lease revenue	(21,990)	(27,470)
(Gains) losses from futures contracts included in product sales revenue	53,793	(123,769)
Affiliate management fee revenue	(5,302)	(5,291)
Total revenue from contracts with customers under ASC 606	687,574	626,276
Service [Member]
Disaggregation of Revenue [Line Items]
Revenue	425,170	458,395
Product [Member]
Disaggregation of Revenue [Line Items]
Revenue	230,601	319,120
Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,302	5,291
Operating Segments [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	513,749	628,889
Lease revenue	(4,147)	(8,162)
(Gains) losses from futures contracts included in product sales revenue	48,437	(121,047)
Affiliate management fee revenue	(1,550)	(1,584)
Total revenue from contracts with customers under ASC 606	556,489	498,096
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	149,136	155,499
Lease revenue	(17,843)	(19,308)
(Gains) losses from futures contracts included in product sales revenue	5,356	(2,722)
Affiliate management fee revenue	(3,752)	(3,707)
Total revenue from contracts with customers under ASC 606	132,897	129,762
Operating Segments [Member] | Service [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	310,768	314,319
Operating Segments [Member] | Service [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	116,214	145,658
Operating Segments [Member] | Product [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	201,431	312,986
Operating Segments [Member] | Product [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	29,170	6,134
Operating Segments [Member] | Product and Service, Other [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,550	1,584
Operating Segments [Member] | Product and Service, Other [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,752	3,707
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	(1,812)	(1,582)
Lease revenue	0	0
(Gains) losses from futures contracts included in product sales revenue	0	0
Affiliate management fee revenue	0	0
Total revenue from contracts with customers under ASC 606	(1,812)	(1,582)
Intersegment Eliminations [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenue	(1,812)	(1,582)
Intersegment Eliminations [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0
Intersegment Eliminations [Member] | Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0
Transferred over Time [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenue	425,170	458,395
Transferred over Time [Member] | Transportation [Member]
Disaggregation of Revenue [Line Items]
Revenue	248,473	265,238
Transferred over Time [Member] | Terminalling [Member]
Disaggregation of Revenue [Line Items]
Revenue	38,908	43,695
Transferred over Time [Member] | Storage [Member]
Disaggregation of Revenue [Line Items]
Revenue	76,607	82,676
Transferred over Time [Member] | Ancillary Services [Member]
Disaggregation of Revenue [Line Items]
Revenue	39,192	39,316
Transferred over Time [Member] | Lease Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue	21,990	27,470
Transferred over Time [Member] | Operating Segments [Member] | Service [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	310,768	314,319
Transferred over Time [Member] | Operating Segments [Member] | Service [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	116,214	145,658
Transferred over Time [Member] | Operating Segments [Member] | Transportation [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	193,427	178,456
Transferred over Time [Member] | Operating Segments [Member] | Transportation [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	55,046	86,782
Transferred over Time [Member] | Operating Segments [Member] | Terminalling [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	32,791	40,386
Transferred over Time [Member] | Operating Segments [Member] | Terminalling [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,117	3,309
Transferred over Time [Member] | Operating Segments [Member] | Storage [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	49,157	55,075
Transferred over Time [Member] | Operating Segments [Member] | Storage [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	29,262	29,183
Transferred over Time [Member] | Operating Segments [Member] | Ancillary Services [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	31,246	32,240
Transferred over Time [Member] | Operating Segments [Member] | Ancillary Services [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	7,946	7,076
Transferred over Time [Member] | Operating Segments [Member] | Lease Revenue [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	4,147	8,162
Transferred over Time [Member] | Operating Segments [Member] | Lease Revenue [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	17,843	19,308
Transferred over Time [Member] | Intersegment Eliminations [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenue	(1,812)	(1,582)
Transferred over Time [Member] | Intersegment Eliminations [Member] | Transportation [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0
Transferred over Time [Member] | Intersegment Eliminations [Member] | Terminalling [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0
Transferred over Time [Member] | Intersegment Eliminations [Member] | Storage [Member]
Disaggregation of Revenue [Line Items]
Revenue	(1,812)	(1,582)
Transferred over Time [Member] | Intersegment Eliminations [Member] | Ancillary Services [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0
Transferred over Time [Member] | Intersegment Eliminations [Member] | Lease Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0
Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Revenue	230,601	319,120
Transferred at Point in Time [Member] | Operating Segments [Member] | Product [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	201,431	312,986
Transferred at Point in Time [Member] | Operating Segments [Member] | Product [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	29,170	6,134
Transferred at Point in Time [Member] | Intersegment Eliminations [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 0

Revenue (Assets and Liabilities

Revenue (Assets and Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Billed Contracts Receivable	$ 141,387	$ 108,843
Contract with Customer, Asset, after Allowance for Credit Loss	11,429	12,220
Contract with Customer, Liability	$ 100,824	$ 102,964

Revenue (Performance Obligation

Revenue (Performance Obligations in Next 12 Months) (Details) $ in Thousands	Mar. 31, 2021USD ($)
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 3,245,463
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 649,910
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	12 months
Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 2,047,797
Refined Products Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	389,591
Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	1,197,666
Crude Oil Pipeline and Terminals Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 260,319
Minimum [Member] | Refined Products Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Minimum [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Maximum [Member] | Refined Products Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	17 years
Maximum [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	11 years

Investments in Non-Controlled_3

Investments in Non-Controlled Entities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Revenues	$ 661,073	$ 782,806
Operating	130,604	149,508
Other operating income (expense)	(462)	(511)
Trade accounts receivable	142,948		$ 109,136
Other accounts receivable	35,355		37,075
Change in Equity Method Investments [Roll Forward]
Investments, Beginning Balance	1,213,856
Additional investment	1,865
Proportionate share of earnings	39,505
Amortization of excess investment and capitalized interest	(453)
Earnings of non-controlled entities	39,052	43,660
Distributions from operations of non-controlled entities	51,434	54,743
Investments, Ending Balance	1,203,339
Service [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	425,170	458,395
Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Related Party Transaction, Other Revenues from Transactions with Related Party	$ 500	1,200
BridgeTex [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	30.00%
BridgeTex [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Trade accounts receivable	$ 263		355
Other accounts receivable	12		27
Other Accounts Payable	1,308		970
BridgeTex [Member] | Equity Method Investee [Member] | Service [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	$ 10,740	10,748
Double Eagle Pipeline Llc [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%
Double Eagle Pipeline Llc [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Trade accounts receivable	$ 310		277
Double Eagle Pipeline Llc [Member] | Equity Method Investee [Member] | Service [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	$ 976	1,600
HoustonLink Pipeline Company LLC [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%
HoustonLink Pipeline Company LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Other Accounts Payable	$ 149		144
MVP Terminalling, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%
MVP Terminalling, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Other accounts receivable	$ 633		467
Other Accounts Payable	$ 862		2,297
Powder Springs Logistics, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%
Powder Springs Logistics, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Trade accounts receivable	$ 101
Other accounts receivable	96
Long-term receivables	$ 10,293		10,223
Saddlehorn Pipeline Company [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	30.00%
Saddlehorn Pipeline Company [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Other accounts receivable	$ 175		121
Saddlehorn Pipeline Company [Member] | Equity Method Investee [Member] | Service [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	$ 580	566
Seabrook Logistics, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%
Seabrook Logistics, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Operating	$ 5,310	6,899
Other operating income (expense)	0	$ 1,410
Other accounts receivable	105
Other Accounts Payable	$ 2,528		$ 7,274
Texas Frontera Llc [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%

Inventory (Details)

Inventory (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Refined products	$ 94,098	$ 79,473
Crude oil	47,993	32,431
Liquefied petroleum gases	20,926	26,734
Transmix	44,940	23,397
Additives	4,816	5,354
Total inventory	$ 212,773	$ 167,389

Debt (Consolidated Debt) (Detai

Debt (Consolidated Debt) (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 5,017,000,000	$ 5,000,000,000
Unamortized debt issuance costs	(39,631,000)	(40,143,000)
Net unamortized premium	18,773,000	18,834,000
Long-term debt, net	$ 4,996,142,000	4,978,691,000
3.20% Notes Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.20%
Debt Instrument, Face Amount	$ 250,000,000	250,000,000
5.00% Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.00%
Debt Instrument, Face Amount	$ 650,000,000	650,000,000
3.25% Notes Due 2030 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.25%
Debt Instrument, Face Amount	$ 500,000,000	500,000,000
6.40% Notes Due 2037 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.40%
Debt Instrument, Face Amount	$ 250,000,000	250,000,000
4.20% Notes Due 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.20%
Debt Instrument, Face Amount	$ 250,000,000	250,000,000
5.15% Notes Due 2043 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.15%
Debt Instrument, Face Amount	$ 550,000,000	550,000,000
4.20% Notes Due 2045 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.20%
Debt Instrument, Face Amount	$ 250,000,000	250,000,000
4.25% Notes Due 2046 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.25%
Debt Instrument, Face Amount	$ 500,000,000	500,000,000
4.20% Notes Due 2047 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.20%
Debt Instrument, Face Amount	$ 500,000,000	500,000,000
4.85% Notes Due 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	4.85%
Debt Instrument, Face Amount	$ 500,000,000	500,000,000
3.95% Notes Due 2050 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.95%
Debt Instrument, Face Amount	$ 800,000,000	800,000,000
Commercial Paper [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 17,000,000	$ 0

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 5,017,000,000	$ 5,000,000,000
Commercial Paper [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	17,000,000	0
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,000,000,000
Debt, Weighted Average Interest Rate	0.20%
Commercial Paper [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Term	397 days
Senior Notes [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,000,000,000
Unused commitment fee	0.125%
Long term debt	$ 0	0
Obligation for letters of credit	$ 3,500,000	$ 3,500,000
Senior Notes [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Unused commitment fee	0.075%
Senior Notes [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Unused commitment fee	0.20%
London Interbank Offered Rate (LIBOR) [Member] | Senior Notes [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.875%
London Interbank Offered Rate (LIBOR) [Member] | Senior Notes [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.50%

Leases Operating Lease, Other D

Leases Operating Lease, Other Disclosure (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Total lease expense	$ 12,331	$ 12,889
Current lease liability	26,661		$ 27,533
Long-term lease liability	168,817		137,483
Right-of-use asset	194,463		166,078
N/A [Member]
Related Party Transaction [Line Items]
Total lease expense	7,021	5,990
Current lease liability	17,257		17,099
Long-term lease liability	118,291		84,982
Right-of-use asset	134,533		103,142
Seabrook Logistics, LLC [Member] | Equity Method Investee [Member]
Related Party Transaction [Line Items]
Total lease expense	5,310	$ 6,899
Current lease liability	9,404		10,434
Long-term lease liability	50,526		52,501
Right-of-use asset	$ 59,930		$ 62,936

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021USD ($)pension_plan	Mar. 31, 2020USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Contribution Plan, Cost | $	$ 3.1	$ 4.5
Number Of Sponsored Pension Plans | pension_plan	2
Number Of Sponsored Pension Plans, Non-Union Employees | pension_plan	1
Number Of Sponsored Pension Plans, Union Employees | pension_plan	1
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | $	$ 28
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year | $	$ 0.2

Employee Benefit Plans - Schedu

Employee Benefit Plans - Schedule Of Consolidated Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Pension Plan [Member]
Components of net periodic benefit costs:
Service cost	$ 7,353	$ 7,203
Interest cost	2,400	2,802
Expected return on plan assets	(3,046)	(2,886)
Amortization of prior service credit	(45)	(45)
Amortization of actuarial loss	1,544	1,412
Settlement cost	0	969
Settlement gain on disposition of assets	0	(1,342)
Net periodic benefit cost	8,206	8,113
Other Postretirement Benefits Plan [Member]
Components of net periodic benefit costs:
Service cost	76	62
Interest cost	95	112
Expected return on plan assets	0	0
Amortization of prior service credit	0	0
Amortization of actuarial loss	147	119
Settlement cost	0	0
Settlement gain on disposition of assets	0	0
Net periodic benefit cost	$ 318	$ 293

Employee Benefit Plans Schedule

Employee Benefit Plans Schedule of Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Changes in AOCL [Roll Forward]
Beginning balance	$ 2,303,806	$ 2,715,028
Net actuarial loss	0	(747)
Curtailment gain	0	1,703
Recognition of prior service credit amortization in income	(45)	(45)
Recognition of actuarial loss amortization in income	1,691	1,531
Recognition of settlement cost in income	0	969
Ending balance	2,297,032	2,543,977
Pension Plan [Member]
Changes in AOCL [Roll Forward]
Net actuarial loss	0	(747)
Curtailment gain	0	1,703
Recognition of prior service credit amortization in income	(45)	(45)
Recognition of actuarial loss amortization in income	1,544	1,412
Recognition of settlement cost in income	0	969
Other Postretirement Benefits Plan [Member]
Changes in AOCL [Roll Forward]
Net actuarial loss	0	0
Curtailment gain	0	0
Recognition of prior service credit amortization in income	0	0
Recognition of actuarial loss amortization in income	147	119
Recognition of settlement cost in income	0	0
Accumulated Other Comprehensive Loss | Pension Plan [Member]
Changes in AOCL [Roll Forward]
Beginning balance	(117,782)	(104,739)
Ending balance	(116,283)	(101,447)
Accumulated Other Comprehensive Loss | Other Postretirement Benefits Plan [Member]
Changes in AOCL [Roll Forward]
Beginning balance	(10,409)	(8,378)
Ending balance	$ (10,262)	$ (8,259)

Long-Term Incentive Plan (Narra

Long-Term Incentive Plan (Narrative) (Details) - shares	Feb. 05, 2021	Mar. 31, 2021
Share-based Payment Arrangement [Abstract]
Limited partners' capital account, units authorized for issuance (in shares)		11,900,000
Limited partner unitholders, units remaining available (in shares)		600,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	558,516
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years

Long-Term Incentive Plan (Equit

Long-Term Incentive Plan (Equity-Based Incentive Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Allocation of LTIP expense on consolidated statements of income	$ 4,679	$ 155
Performance Based Awards [Member]
Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Allocation of LTIP expense on consolidated statements of income	2,216	(1,947)
Time-Based Awards [Member]
Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Allocation of LTIP expense on consolidated statements of income	$ 2,463	$ 2,102

Derivative Financial Instrume_3

Derivative Financial Instruments (Narrative) (Details) $ in Thousands	Mar. 31, 2021USD ($)bbl	Dec. 31, 2020USD ($)
Derivative [Line Items]
Good Faith and Margin Deposits with Broker-Dealers	$ 40,029	$ 34,165
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ (3,500)
Energy Related Derivative [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl	30,000
Derivative Liability	$ 7,300	$ 10,200

Derivative Financial Instrume_4

Derivative Financial Instruments (Schedule Of NYMEX Contracts And Butane Price Swap Purchase Agreements) (Details) bbl in Millions	Mar. 31, 2021bbl
Economic Hedges [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	3
Economic Hedges Futures [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	0.2

Derivative Financial Instrume_5

Derivative Financial Instruments (Schedule of Derivative Offset Amounts) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Commodity derivatives deposits	$ 40,029	$ 34,165
Exchange Traded [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability	(24,099)	(22,988)
Derivative Asset, Fair Value, Gross Asset	2,626	1,690
Derivative Liability, Fair Value, Amount Not Offset Against Collateral	(21,473)	(21,298)
Commodity derivatives deposits	40,029	34,165
Amount After Offset	$ 18,556	$ 12,867

Derivative Financial Instrume_6

Derivative Financial Instruments (Derivative Gains Included In Accumulated Other Comprehensive Loss (AOCL) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative Gains Included in AOCI [Roll Forward]
Beginning balance	$ 2,303,806	$ 2,715,028
Net gain (loss) on cash flow hedges	0	(11,914)
Reclassification of net loss (gain) on cash flow hedges to income	887	809
Ending balance	2,297,032	2,543,977
Derivative Losses Included in AOCL
Derivative Gains Included in AOCI [Roll Forward]
Beginning balance	(54,999)	(48,960)
Ending balance	$ (54,112)	$ (60,065)

Derivative Financial Instrume_7

Derivative Financial Instruments (Derivatives And Hedging-Cash Flow Hedges) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on cash flow hedges	$ 0	$ (11,914)
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	(887)	(809)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on cash flow hedges	0	(11,914)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net	$ (887)	$ (809)

Derivative Financial Instrume_8

Derivative Financial Instruments (Derivatives And Hedging-Overall-Subsequent Measurement) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (52,773)	$ 116,943
Commodity Contract [Member] | Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(53,793)	123,769
Commodity Contract [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	1,670	(3,927)
Energy Related Derivative [Member] | Other Operating Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (650)	$ (2,899)

Derivative Financial Instrume_9

Derivative Financial Instruments (Derivatives and Hedging - Designated) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 2,626	$ 1,690
Derivative Liability, Fair Value, Gross Liability	31,440	33,230
Commodity Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	2,626	616
Commodity Contract [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	23,418	22,988
Commodity Contract [Member] | Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	1,074
Commodity Contract [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	681	0
Energy Related Derivative [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0	0
Energy Related Derivative [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 7,341	8,774
Energy Related Derivative [Member] | Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset		0
Energy Related Derivative [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability		$ 1,468

Fair Value Fair Value (Narrativ

Fair Value Fair Value (Narrative) (Details)	3 Months Ended
	Mar. 31, 2021bblTerminal	Mar. 31, 2020Terminal
Derivative [Line Items]
Number Of Marine Terminals Sold | Terminal	3	3
Energy Related Derivative [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl	30,000

Fair Value (Schedule Of Carryin

Fair Value (Schedule Of Carrying Amounts And Fair Values Of Financial Assets/Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Energy Related Derivative [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	$ (7,300)	$ (10,200)
Fair Value, Inputs, Level 1 [Member] | Commodity Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	(21,473)	(21,298)
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt	(5,341,424)	(5,880,850)
Fair Value, Inputs, Level 2 [Member] | Energy Related Derivative [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	(7,341)	(10,242)
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	21,590	22,755
Guarantees, Fair Value Disclosure	(11,172)	(11,207)
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	21,590	22,755
Guarantees, Fair Value Disclosure	(11,172)	(11,207)
Debt	(4,996,142)	(4,978,691)
Reported Value Measurement [Member] | Commodity Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	(21,473)	(21,298)
Reported Value Measurement [Member] | Energy Related Derivative [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	(7,341)	(10,242)
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	21,590	22,755
Guarantees, Fair Value Disclosure	(11,172)	(11,207)
Debt	(5,341,424)	(5,880,850)
Estimate of Fair Value Measurement [Member] | Commodity Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	(21,473)	(21,298)
Estimate of Fair Value Measurement [Member] | Energy Related Derivative [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	$ (7,341)	$ (10,242)

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021USD ($)Terminal	Mar. 31, 2020USD ($)Terminal	Dec. 31, 2020USD ($)	Oct. 04, 2017facility
Loss Contingencies [Line Items]
Liabilities recognized for estimated environmental costs	$ 12.7		$ 14.3
Environmental expenses	$ 1.1	$ 0.4
Number Of Marine Terminals Sold | Terminal	3	3
Performance Guarantee [Member] | Other Current Liabilities [Member]
Loss Contingencies [Line Items]
Guarantees, Fair Value Disclosure	$ 0.6		0.6
Performance Guarantee [Member] | Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Guarantees, Fair Value Disclosure	$ 10.2		$ 10.2
Powder Springs Logistics, LLC [Member]
Loss Contingencies [Line Items]
Interest in equity method investment	50.00%
Powder Springs Logistics, LLC [Member] | Guarantee of Indebtedness of Others [Member] | Equity Method Investee [Member]
Loss Contingencies [Line Items]
Guarantees, Fair Value Disclosure	$ 0.4
Interest in equity method investment	50.00%
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 25
Pending Litigation [Member] | Unfavorable Regulatory Action [Member]
Loss Contingencies [Line Items]
Loss Contingency, Alleged Patent Infringement, Number Of Facilities | facility				9

Related Party Transactions (Det

Related Party Transactions (Details) - Director [Member] - Methvin Company [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Related Party Transaction, Other Revenues from Transactions with Related Party	$ 11.3	$ 8.4
Accounts Receivable, Related Parties, Current	$ 4		$ 3.9

Partners' Capital and Distrib_3

Partners' Capital and Distributions (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021USD ($)shares
Partners' Capital [Abstract]
Stock Repurchase Program, Authorized Amount | $	$ 750
Shares repurchased (in shares) | shares	0

Partners' Capital and Distrib_4

Partners' Capital and Distributions (Schedule of Capital Units) (Details)	3 Months Ended
	Mar. 31, 2021shares
Increase (Decrease) in Partners' Capital [Roll Forward]
Limited partner units outstanding, beginning balance (in shares)	223,119,811
Limited partner units outstanding, ending balance (in shares)	223,282,818
Management [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
During 2021–Other (in shares)	150,435
Director [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
During 2021–Other (in shares)	12,572

Partners' Capital and Distrib_5

Partners' Capital and Distributions (Schedule Of Distributions) (Details) - USD ($) $ / shares in Units, $ in Thousands	May 14, 2021	Feb. 12, 2021	Nov. 13, 2020	Aug. 14, 2020	May 15, 2020	Feb. 14, 2020	Jun. 30, 2021	Dec. 31, 2020
Distribution Made to Limited Partner [Line Items]
Cash distribution per unit (in dollars per share)		$ 1.0275	$ 1.0275	$ 1.0275	$ 1.0275	$ 1.0275		$ 4.1100
Total Cash Distribution to Limited Partners		$ 229,423	$ 229,853	$ 231,245	$ 231,245	$ 234,774		$ 927,117
Scenario, Forecast
Distribution Made to Limited Partner [Line Items]
Cash distribution per unit (in dollars per share)	$ 1.0275						$ 2.0550
Total Cash Distribution to Limited Partners	$ 229,423						$ 458,846

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands

1 Months Ended

3 Months Ended

Apr. 30, 2021

Mar. 31, 2021

Mar. 31, 2020

Jun. 30, 2021

May 14, 2021

Apr. 19, 2021

Feb. 12, 2021

Dec. 31, 2020

Nov. 13, 2020

Aug. 14, 2020

May 15, 2020

Feb. 14, 2020

Subsequent Event [Line Items]

Proceeds from Sale of Productive Assets

$ 656

$ 332,789

Cash distribution per unit (in dollars per share)

$ 1.0275

$ 4.1100

$ 1.0275

$ 1.0275

$ 1.0275

$ 1.0275

MVP Terminalling, LLC [Member]

Subsequent Event [Line Items]

Interest in equity method investment

50.00%

Scenario, Forecast

Subsequent Event [Line Items]

Cash distribution per unit (in dollars per share)

$ 2.0550

$ 1.0275

Subsequent Event | MVP Terminalling, LLC [Member]

Subsequent Event [Line Items]

Proceeds from Sale of Productive Assets

$ 271,000

Interest in equity method investment

25.00%

Subsequent Event | Scenario, Forecast

Subsequent Event [Line Items]

Cash distribution per unit (in dollars per share)

$ 1.0275