Magellan Midstream Partners (MMP) 10-Q 1 Aug 19 2019 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2019	Jul. 31, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2019
Document Transition Report	false
Entity File Number	1-16335
Entity Registrant Name	Magellan Midstream Partners, L.P.
Entity Central Index Key	0001126975
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
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
Entity Filer Category	Large Accelerated Filer
Title of 12(b) Security	Common Units representing limited partnership units
Trading Symbol	MMP
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		228,403,428

Consolidated Statements Of Inco

Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues	$ 701,699	$ 644,091	$ 1,330,634	$ 1,322,870
Costs and expenses:
Operating	168,929	159,845	314,954	303,141
Cost of product sales	152,876	153,679	321,970	353,271
Depreciation, amortization and impairment	62,530	53,619	124,401	105,498
General and administrative	52,383	53,290	98,378	99,846
Total costs and expenses	436,718	420,433	859,703	861,756
Other operating income (expense)	(5,024)	0	1,917	0
Earnings of non-controlled entities	40,785	42,510	72,040	77,048
Operating profit	300,742	266,168	544,888	538,162
Interest expense	51,406	56,750	111,572	113,402
Interest capitalized	(5,134)	(5,608)	(8,588)	(10,255)
Interest income	(338)	(380)	(1,998)	(959)
Gain on disposition of assets	(4,646)	0	(26,434)	0
Other (income) expense	4,570	(119)	6,620	8,605
Income before provision for income taxes	254,884	215,525	463,716	427,369
Provision for income taxes	1,181	1,116	2,350	2,050
Net income	$ 253,703	$ 214,409	$ 461,366	$ 425,319
Basic net income per limited partner unit (in dollars per share)	$ 1.11	$ 0.94	$ 2.02	$ 1.86
Diluted net income per limited partner unit (in dollars per share)	$ 1.11	$ 0.94	$ 2.02	$ 1.86
Weighted average number of limited partner units outstanding used for basic net income per unit calculation (in dollars per share)	228,647	228,387	228,603	228,354
Weighted average number of limited partner units outstanding used for diluted net income per unit calculation (in dollars per share)	228,688	228,425	228,623	228,393
Service [Member]
Revenues	$ 506,405	$ 472,248	$ 967,197	$ 904,185
Product [Member]
Revenues	189,989	166,797	352,984	408,389
Product and Service, Other [Member]
Revenues	$ 5,305	$ 5,046	$ 10,453	$ 10,296

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 253,703	$ 214,409	$ 461,366	$ 425,319
Other comprehensive income (loss):
Net gain (loss) on cash flow hedges	(6,659)	1,697	(11,035)	7,111
Reclassification of net loss on cash flow hedges to income	601	739	1,228	1,479
Net actuarial gain (loss)	(10,913)	653	(10,913)	(5,291)
Amortization of prior service credit	(45)	(46)	(90)	(91)
Amortization of actuarial loss	1,625	1,703	2,973	6,817
Settlement cost	2,060	0	2,060	0
Total other comprehensive income (loss)	(13,331)	4,746	(15,777)	10,025
Comprehensive income	$ 240,372	$ 219,155	$ 445,589	$ 435,344

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 3,070	$ 218,283
Trade accounts receivable	139,611	104,164
Other accounts receivable	25,317	25,007
Inventory	172,907	185,735
Energy commodity derivatives contracts, net	0	55,011
Energy commodity derivatives deposits	27,533	0
Other current assets	38,580	58,143
Total current assets	407,018	646,343
Property, plant and equipment	8,024,845	7,628,592
Less: accumulated depreciation	1,935,301	1,830,411
Net property, plant and equipment	6,089,544	5,798,181
Investments in non-controlled entities	1,165,028	1,076,306
Right-of-use asset, operating leases	167,456	0
Long-term receivables	21,304	20,844
Goodwill	53,260	53,260
Other intangibles (less accumulated amortization of $2,979 and $4,920 at December 31, 2018 and June 30, 2019, respectively)	49,233	51,174
Restricted cash	28,176	90,978
Other noncurrent assets	24,421	10,451
Total assets	8,005,440	7,747,537
Current liabilities:
Accounts payable	179,734	138,735
Accrued payroll and benefits	47,396	70,276
Accrued interest payable	57,805	63,258
Accrued taxes other than income	48,148	53,093
Environmental liabilities	4,687	9,153
Deferred revenue	111,896	121,085
Accrued product liabilities	76,459	75,482
Energy commodity derivatives contracts, net	9,097	0
Energy commodity derivatives deposits	0	37,328
Current portion of operating lease liability	22,477	0
Current portion of long-term debt, net	0	59,489
Other current liabilities	60,572	48,657
Total current liabilities	618,271	676,556
Long-term operating lease liability	146,726	0
Long-term debt, net	4,407,793	4,211,380
Long-term pension and benefits	133,513	122,580
Other noncurrent liabilities	48,968	82,240
Environmental liabilities	12,390	11,347
Commitments and contingencies
Partners’ capital:
Limited partner unitholders (228,195 units and 228,403 units outstanding at December 31, 2018 and June 30, 2019, respectively)	2,774,047	2,763,925
Accumulated other comprehensive loss	(136,268)	(120,491)
Total partners’ capital	2,637,779	2,643,434
Total liabilities and partners’ capital	$ 8,005,440	$ 7,747,537

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Other intangibles, accumulated amortization	$ 4,920	$ 2,979
Limited partner unitholders, units outstanding (in shares)	228,403,428	228,195,160

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating Activities:
Net income	$ 461,366	$ 425,319
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and impairment expense	124,401	105,498
Loss (gain) on sale and retirement of assets	(26,437)	4,586
Earnings of non-controlled entities	(72,040)	(77,048)
Distributions from operations of non-controlled entities	83,069	94,661
Equity-based incentive compensation expense	15,804	16,679
Settlement cost, amortization of prior service credit and actuarial loss	4,943	6,726
Debt prepayment costs	8,270	0
Changes in operating assets and liabilities:
Trade accounts receivable and other accounts receivable	(35,757)	24,739
Inventory	12,828	(1,233)
Accounts payable	22,110	18,843
Accrued payroll and benefits	(22,880)	(11,070)
Accrued interest payable	(5,453)	(62)
Accrued taxes other than income	(4,945)	(10,199)
Accrued product liabilities	977	(32,142)
Deferred revenue	(9,189)	4,240
Other current and noncurrent assets and liabilities	13,493	(5,471)
Net cash provided by operating activities	570,560	564,066
Investing Activities:
Additions to property, plant and equipment, net	(487,662)	(219,442)
Proceeds from sale and disposition of assets	63,887	241
Investments in non-controlled entities	(112,251)	(144,859)
Distributions from returns of investments in non-controlled entities	7,500	0
Deposits received from undivided joint interest third party	26,352	41,571
Net cash used by investing activities	(502,174)	(322,489)
Financing Activities:
Distributions paid	(457,377)	(423,873)
Net commercial paper borrowings	197,000	119,896
Borrowings under long-term notes	496,855	0
Payments on notes	(550,000)	0
Debt placement costs	(6,817)	(326)
Net payment on financial derivatives	(8,028)	0
Payments associated with settlement of equity-based incentive compensation	(9,764)	(9,285)
Debt prepayment costs	(8,270)	0
Net cash used by financing activities	(346,401)	(313,588)
Change in cash, cash equivalents and restricted cash	(278,015)	(72,011)
Cash, cash equivalents and restricted cash at beginning of period	309,261	176,068
Cash, cash equivalents and restricted cash at end of period	31,246	104,057
Supplemental non-cash investing activities:
Additions to property, plant and equipment	(514,812)	(219,828)
Changes in accounts payable and other current liabilities related to capital expenditures	27,150	386
Additions to property, plant and equipment, net	$ (487,662)	$ (219,442)

Consolidated Statement of Partn

Consolidated Statement of Partners' Capital Statement - USD ($) $ in Thousands	Total	Limited Partners	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2017	$ 2,129,653	$ 2,267,231	$ (137,578)
Comprehensive income:
Net income	425,319	425,319
Total other comprehensive income (loss)	10,025		10,025
Comprehensive income	435,344	425,319	10,025
Distributions	(423,873)	(423,873)
Equity-based incentive compensation expense	16,679	16,679
Issuance of limited partner units in settlement of equity-based incentive plan awards	120	120
Payments associated with settlement of equity-based incentive compensation	(9,285)	(9,285)
Other	(321)	(321)
Ending balance at Jun. 30, 2018	2,154,292	2,281,845	(127,553)
Beginning balance at Mar. 31, 2018	2,139,187	2,271,486	(132,299)
Comprehensive income:
Net income	214,409	214,409
Total other comprehensive income (loss)	4,746		4,746
Comprehensive income	219,155	214,409	4,746
Distributions	(213,933)	(213,933)
Equity-based incentive compensation expense	10,047	10,047
Other	(164)	(164)
Ending balance at Jun. 30, 2018	2,154,292	2,281,845	(127,553)
Beginning balance at Dec. 31, 2018	2,643,434	2,763,925	(120,491)
Comprehensive income:
Net income	461,366	461,366
Total other comprehensive income (loss)	(15,777)		(15,777)
Comprehensive income	445,589	461,366	(15,777)
Distributions	(457,377)	(457,377)
Equity-based incentive compensation expense	15,804	15,804
Issuance of limited partner units in settlement of equity-based incentive plan awards	480	480
Payments associated with settlement of equity-based incentive compensation	(9,764)	(9,764)
Other	(387)	(387)
Ending balance at Jun. 30, 2019	2,637,779	2,774,047	(136,268)
Beginning balance at Mar. 31, 2019	2,616,255	2,739,192	(122,937)
Comprehensive income:
Net income	253,703	253,703
Total other comprehensive income (loss)	(13,331)		(13,331)
Comprehensive income	240,372	253,703	(13,331)
Distributions	(229,545)	(229,545)
Equity-based incentive compensation expense	10,890	10,890
Other	(193)	(193)
Ending balance at Jun. 30, 2019	$ 2,637,779	$ 2,774,047	$ (136,268)

Organization, Description of Bu

Organization, Description of Business And Basis Of Presentation	6 Months Ended
	Jun. 30, 2019
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 limited partner 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 June 30, 2019 , our asset portfolio consisted of: • our refined products segment, comprised of our approximately 9,700 -mile refined products pipeline system with 53 terminals as well as 25 independent terminals not connected to our pipeline system and our 1,100 -mile ammonia pipeline system; • our crude oil segment, comprised of approximately 2,200 miles of crude oil pipelines, a condensate splitter and 33 million barrels of aggregate storage capacity, of which approximately 21 million barrels are used for contract storage. Approximately 1,000 miles of these pipelines, the condensate splitter and 28 million barrels of this storage capacity (including 19 million barrels used for contract storage) are wholly-owned, with the remainder owned through joint ventures; and • our marine storage segment, consisting of six marine terminals located along coastal waterways with an aggregate storage capacity of approximately 27 million barrels. Five of these terminals and approximately 25 million barrels of this storage capacity are wholly-owned, with the remainder owned through joint ventures. Terminology common in our industry includes the following terms, which describe products that we transport, store and distribute through our pipelines and terminals: • refined products are the output from refineries and are primarily used as fuels by consumers. Refined products include gasoline, diesel fuel, aviation fuel, kerosene and heating oil. Collectively, diesel fuel, kerosene and heating oil are referred to as distillates; • liquefied petroleum gases, or LPGs, are produced as by-products of the crude oil refining process and in connection with natural gas production. LPGs include butane and propane; • blendstocks are blended with refined products to change or enhance their characteristics such as increasing a gasoline’s octane or oxygen content. Blendstocks include alkylates, oxygenates and natural gasoline; • heavy oils and feedstocks are used as burner fuels or feedstocks for further processing by refineries and petrochemical facilities. Heavy oils and feedstocks include No. 6 fuel oil and vacuum gas oil; • crude oil , which includes condensate, is used as feedstock by refineries, splitters and petrochemical facilities; and • biofuels , such as ethanol and biodiesel, are 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, 2018 , which is derived from our audited financial statements, include all normal and recurring adjustments necessary to present fairly our financial position as of June 30, 2019 , the results of operations for the three and six months ended June 30, 2018 and 2019 and cash flows for the six months ended June 30, 2018 and 2019 . The results of operations for the six months ended June 30, 2019 are not necessarily indicative of the results to be expected for the full year ending December 31, 2019 for several reasons. Profits from our butane 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 do not include all of the information and notes normally included with financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). 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, 2018 . 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 - Adopted by us on January 1, 2019 In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842). This ASU requires lessees to recognize a right of use asset and lease liability on the balance sheet for all leases, with the exception of short-term leases. The new accounting model for lessors remains largely the same, although some changes have been made to align it with the new lessee model and the new revenue recognition guidance. This update also requires companies to include additional disclosures regarding their lessee and lessor agreements. We adopted this standard on January 1, 2019, and it did not have a material impact on our consolidated statements of income or our leverage ratio as defined in our credit agreement. Adoption of this ASU resulted in an initial increase in our assets and liabilities by approximately $172 million due to the recognition of right of use assets and lease liabilities. See Note 7 – Leases for our lease disclosures.

Revenue from Contract with Cust

Revenue from Contract with Customers	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer	Revenue from Contracts with Customers 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 June 30, 2018 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation $ 184,596 $ 84,755 $ — $ — $ 269,351 Terminalling 50,574 — 592 — 51,166 Storage 24,969 28,536 33,319 (915 ) 85,909 Ancillary services 28,459 8,199 6,037 — 42,695 Lease revenue 2,466 16,463 4,198 — 23,127 Transportation and terminals revenue 291,064 137,953 44,146 (915 ) 472,248 Product sales revenue 150,934 13,282 2,581 — 166,797 Affiliate management fee revenue 352 3,849 845 — 5,046 Total revenue 442,350 155,084 47,572 (915 ) 644,091 Revenue not under the guidance of ASC 606, Revenue from Contracts with Customers : Lease revenue (1) (2,466 ) (16,463 ) (4,198 ) — (23,127 ) Losses from futures contracts included in product sales revenue (2) 34,840 3,570 — — 38,410 Affiliate management fee revenue (352 ) (3,849 ) (845 ) — (5,046 ) Total revenue from contracts with customers under ASC 606 $ 474,372 $ 138,342 $ 42,529 $ (915 ) $ 654,328 (1) Lease revenue in 2018 is accounted for under ASC 840, Leases . (2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging . Three Months Ended June 30, 2019 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation $ 201,173 $ 91,534 $ — $ — $ 292,707 Terminalling 48,554 4,723 690 — 53,967 Storage 25,471 34,972 34,485 (1,341 ) 93,587 Ancillary services 28,128 6,611 6,581 — 41,320 Lease revenue 2,889 17,729 4,206 — 24,824 Transportation and terminals revenue 306,215 155,569 45,962 (1,341 ) 506,405 Product sales revenue 183,211 5,295 1,483 — 189,989 Affiliate management fee revenue 470 3,646 1,189 — 5,305 Total revenue 489,896 164,510 48,634 (1,341 ) 701,699 Revenue not under the guidance of ASC 606, Revenue from Contracts with Customers : Lease revenue (1) (2,889 ) (17,729 ) (4,206 ) — (24,824 ) (Gains) losses from futures contracts included in product sales revenue (2) 4,713 (95 ) — — 4,618 Affiliate management fee revenue (470 ) (3,646 ) (1,189 ) — (5,305 ) Total revenue from contracts with customers under ASC 606 $ 491,250 $ 143,040 $ 43,239 $ (1,341 ) $ 676,188 (1) Lease revenue in 2019 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 . Six Months Ended June 30, 2018 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation $ 351,498 $ 163,878 $ — $ — $ 515,376 Terminalling 89,922 — 1,304 — 91,226 Storage 50,216 58,526 67,530 (1,830 ) 174,442 Ancillary services 54,247 13,234 13,071 — 80,552 Lease revenue 5,575 28,573 8,441 — 42,589 Transportation and terminals revenue 551,458 264,211 90,346 (1,830 ) 904,185 Product sales revenue 383,708 19,721 4,960 — 408,389 Affiliate management fee revenue 649 7,865 1,782 — 10,296 Total revenue 935,815 291,797 97,088 (1,830 ) 1,322,870 Revenue not under the guidance of ASC 606, Revenue from Contracts with Customers : Lease revenue (1) (5,575 ) (28,573 ) (8,441 ) — (42,589 ) Losses from futures contracts included in product sales revenue (2) 40,305 5,480 — — 45,785 Affiliate management fee revenue (649 ) (7,865 ) (1,782 ) — (10,296 ) Total revenue from contracts with customers under ASC 606 $ 969,896 $ 260,839 $ 86,865 $ (1,830 ) $ 1,315,770 (1) Lease revenue in 2018 is accounted for under ASC 840, Leases . (2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging . Six Months Ended June 30, 2019 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation $ 372,200 $ 176,692 $ — $ — $ 548,892 Terminalling 88,952 9,969 1,589 — 100,510 Storage 51,910 69,290 69,703 (2,279 ) 188,624 Ancillary services 54,024 12,632 13,466 — 80,122 Lease revenue 6,134 34,594 8,321 — 49,049 Transportation and terminals revenue 573,220 303,177 93,079 (2,279 ) 967,197 Product sales revenue 338,367 11,008 3,609 — 352,984 Affiliate management fee revenue 882 7,132 2,439 — 10,453 Total revenue 912,469 321,317 99,127 (2,279 ) 1,330,634 Revenue not under the guidance of ASC 606, Revenue from Contracts with Customers : Lease revenue (1) (6,134 ) (34,594 ) (8,321 ) — (49,049 ) Losses from futures contracts included in product sales revenue (2) 56,822 2,307 — — 59,129 Affiliate management fee revenue (882 ) (7,132 ) (2,439 ) — (10,453 ) Total revenue from contracts with customers under ASC 606 $ 962,275 $ 281,898 $ 88,367 $ (2,279 ) $ 1,330,261 (1) Lease revenue in 2019 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, 2018 June 30, 2019 Accounts receivable from contracts with customers $ 102,684 $ 134,506 Contract assets $ 8,487 $ 8,226 Contract liabilities $ 122,129 $ 115,692 For the three and six months ended June 30, 2019 , we recognized $13.8 million and $84.0 million of transportation and terminals revenue that was recorded in deferred revenue as of December 31, 2018. Unfulfilled Performance Obligations The following table provides the aggregate amount of the transaction price allocated to our unfulfilled performance obligations (“UPOs”) as of June 30, 2019 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 Marine Storage Total Balances at June 30, 2019 $ 2,052,375 $ 1,244,128 $ 221,848 $ 3,518,351 Remaining terms 1 - 19 years 1 - 10 years 1 - 5 years Estimated revenues from UPOs to be recognized in the next 12 months $ 273,714 $ 330,830 $ 114,166 $ 718,710

Segment Disclosures

Segment Disclosures	6 Months Ended
	Jun. 30, 2019
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 as each segment requires different marketing strategies and business knowledge. Management evaluates performance based on segment operating margin, which is calculated in the tables below. We believe that investors benefit from having access to the same financial measures used by management. Operating margin, which is presented in the following tables, is an important measure used by management to evaluate the economic performance of our core operations. Operating margin is not a GAAP measure, but the components of operating margin are computed using amounts that are determined in accordance with GAAP. A reconciliation of operating margin to operating profit, which is its nearest comparable GAAP financial measure, is included in the tables below (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 June 30, 2018 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 291,064 $ 137,953 $ 44,146 $ (915 ) $ 472,248 Product sales revenue 150,934 13,282 2,581 — 166,797 Affiliate management fee revenue 352 3,849 845 — 5,046 Total revenue 442,350 155,084 47,572 (915 ) 644,091 Operating expenses 113,342 31,177 17,693 (2,367 ) 159,845 Cost of product sales 137,543 13,761 2,375 — 153,679 (Earnings) losses of non-controlled entities 97 (41,851 ) (756 ) — (42,510 ) Operating margin 191,368 151,997 28,260 1,452 373,077 Depreciation, amortization and impairment expense 30,508 12,741 8,918 1,452 53,619 G&A expense 33,187 13,455 6,648 — 53,290 Operating profit $ 127,673 $ 125,801 $ 12,694 $ — $ 266,168 Three Months Ended June 30, 2019 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 306,215 $ 155,569 $ 45,962 $ (1,341 ) $ 506,405 Product sales revenue 183,211 5,295 1,483 — 189,989 Affiliate management fee revenue 470 3,646 1,189 — 5,305 Total revenue 489,896 164,510 48,634 (1,341 ) 701,699 Operating expenses 115,811 37,217 18,586 (2,685 ) 168,929 Cost of product sales 146,516 4,710 1,650 — 152,876 Other operating (income) expense (738 ) 6,056 (294 ) — 5,024 (Earnings) losses of non-controlled entities 4,218 (43,735 ) (1,268 ) — (40,785 ) Operating margin 224,089 160,262 29,960 1,344 415,655 Depreciation, amortization and impairment expense 34,738 15,743 10,705 1,344 62,530 G&A expense 31,020 14,097 7,266 — 52,383 Operating profit $ 158,331 $ 130,422 $ 11,989 $ — $ 300,742 Six Months Ended June 30, 2018 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 551,458 $ 264,211 $ 90,346 $ (1,830 ) $ 904,185 Product sales revenue 383,708 19,721 4,960 — 408,389 Affiliate management fee revenue 649 7,865 1,782 — 10,296 Total revenue 935,815 291,797 97,088 (1,830 ) 1,322,870 Operating expenses 207,391 64,768 35,657 (4,675 ) 303,141 Cost of product sales 327,876 20,811 4,584 — 353,271 Earnings of non-controlled entities (2,221 ) (73,459 ) (1,368 ) — (77,048 ) Operating margin 402,769 279,677 58,215 2,845 743,506 Depreciation, amortization and impairment expense 59,415 25,503 17,735 2,845 105,498 G&A expense 62,074 25,361 12,411 — 99,846 Operating profit $ 281,280 $ 228,813 $ 28,069 $ — $ 538,162 Six Months Ended June 30, 2019 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 573,220 $ 303,177 $ 93,079 $ (2,279 ) $ 967,197 Product sales revenue 338,367 11,008 3,609 — 352,984 Affiliate management fee revenue 882 7,132 2,439 — 10,453 Total revenue 912,469 321,317 99,127 (2,279 ) 1,330,634 Operating expenses 205,489 81,040 33,483 (5,058 ) 314,954 Cost of product sales 306,670 11,374 3,926 — 321,970 Other operating (income) expense (1,352 ) 4,483 (5,048 ) — (1,917 ) (Earnings) losses of non-controlled entities 5,648 (76,037 ) (1,651 ) — (72,040 ) Operating margin 396,014 300,457 68,417 2,779 767,667 Depreciation, amortization and impairment expense 70,272 31,002 20,348 2,779 124,401 G&A expense 58,735 26,712 12,931 — 98,378 Operating profit $ 267,007 $ 242,743 $ 35,138 $ — $ 544,888

Investments in Non-Controlled E

Investments in Non-Controlled Entities	6 Months Ended
	Jun. 30, 2019
Equity Method Investments and Joint Ventures [Abstract]
Investments in Non-Controlled Entities	Investments in Non-Controlled Entities Our investments in non-controlled entities at June 30, 2019 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”) 50% Powder Springs Logistics, LLC (“Powder Springs”) 50% Saddlehorn Pipeline Company, LLC (“Saddlehorn”) 40% Seabrook Logistics, LLC (“Seabrook”) 50% Texas Frontera, LLC (“Texas Frontera”) 50% 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 $1.1 million during the three months ended June 30, 2018 and 2019, respectively, and $1.7 million and $2.6 million during the six months ended June 30, 2018 and 2019 , 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 June 30, Six Months Ended June 30, 2018 2019 2018 2019 Transportation and terminals revenue: BridgeTex, pipeline capacity and storage $ 9,697 $ 10,181 $ 19,561 $ 20,326 Double Eagle, throughput revenue $ 1,343 $ 1,572 $ 2,887 $ 3,231 Saddlehorn, storage revenue $ 538 $ 551 $ 1,076 $ 1,103 Operating costs: Seabrook, storage lease and ancillary services $ — $ 6,241 $ — $ 13,150 Product sales revenue: Powder Springs, butane sales $ 2,180 $ — $ 4,899 $ — Cost of product sales: Powder Springs, butane purchases $ 410 $ — $ 410 $ — Our consolidated balance sheets reflected the following balances related to our investments in non-controlled entities (in thousands): December 31, 2018 Trade Accounts Receivable Other Accounts Receivable Other Accounts Payable Long-Term Receivables BridgeTex $ 318 $ 1,549 $ — $ — Double Eagle $ 546 $ — $ — $ — MVP $ — $ 397 $ — $ — Powder Springs $ — $ — $ — $ 2,221 Saddlehorn $ — $ 183 $ — $ — Seabrook $ — $ — $ 1,140 $ — June 30, 2019 Trade Accounts Receivable Other Accounts Receivable Other Accounts Payable Long-Term Receivables BridgeTex $ — $ 31 $ 530 $ — Double Eagle $ 569 $ — $ — $ — MVP $ — $ 387 $ — $ — Powder Springs $ 144 $ 5 $ — $ 3,824 Saddlehorn $ 184 $ 123 $ — $ — Seabrook $ — $ 252 $ 1,195 $ — The financial results from MVP and Texas Frontera are included in our marine storage segment, the financial results from BridgeTex, Double Eagle, HoustonLink, Saddlehorn and Seabrook are included in our crude oil segment and the financial results from Powder Springs are included in our refined products segment, each as earnings of non-controlled entities. A summary of our investments in non-controlled entities follows (in thousands): Investments at 12/31/2018 $ 1,076,306 Additional investment 112,251 Indemnification settlement (5,000 ) Earnings of non-controlled entities: Proportionate share of earnings 72,968 Amortization of excess investment and capitalized interest (928 ) Earnings of non-controlled entities 72,040 Less: Distributions from operations of non-controlled entities 83,069 Distributions from returns of investments in non-controlled entities 7,500 Investments at 6/30/2019 $ 1,165,028

Inventory

Inventory	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Inventory	Inventory Inventory at December 31, 2018 and June 30, 2019 was as follows (in thousands): December 31, 2018 June 30, Refined products $ 92,751 $ 72,219 Liquefied petroleum gases 46,612 46,294 Transmix 28,497 32,891 Crude oil 11,220 15,051 Additives 6,655 6,452 Total inventory $ 185,735 $ 172,907

Employee Benefit Plans

Employee Benefit Plans	6 Months Ended
	Jun. 30, 2019
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 $2.3 million and $2.4 million for the three months ended June 30, 2018 and 2019 , respectively, and $6.1 million and $6.5 million for the six months ended June 30, 2018 and 2019, respectively. Additionally, we sponsor two union pension plans that cover certain union employees, a pension plan for all non-union employees and a postretirement benefit plan for certain employees. Net periodic benefit expense for the three and six months ended June 30, 2018 and 2019 was as follows (in thousands): Three Months Ended Three Months Ended June 30, 2018 June 30, 2019 Pension Benefits Other Postretirement Benefits Pension Benefits Other Postretirement Benefits Components of net periodic benefit costs: Service cost $ 6,269 $ 51 $ 6,358 $ 43 Interest cost 2,795 102 3,110 135 Expected return on plan assets (3,024 ) — (2,317 ) — Amortization of prior service credit (46 ) — (45 ) — Amortization of actuarial loss 1,569 134 1,508 117 Settlement cost — — 2,060 — Net periodic benefit cost $ 7,563 $ 287 $ 10,674 $ 295 Six Months Ended Six Months Ended June 30, 2018 June 30, 2019 Pension Benefits Other Postretirement Benefits Pension Benefits Other Postretirement Benefits Components of net periodic benefit costs: Service cost $ 21,969 $ 116 $ 12,885 $ 97 Interest cost 9,238 208 6,110 254 Expected return on plan assets (6,002 ) — (4,691 ) — Amortization of prior service credit (91 ) — (90 ) — Amortization of actuarial loss 6,523 294 2,785 188 Settlement cost — — 2,060 — Net periodic benefit cost $ 31,637 $ 618 $ 19,059 $ 539 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 and six months ended June 30, 2018 and 2019 were as follows (in thousands): Three Months Ended Three Months Ended June 30, 2018 June 30, 2019 Gains (Losses) Included in AOCL Pension Benefits Other Postretirement Benefits Pension Benefits Other Postretirement Benefits Beginning balance $ (98,261 ) $ (6,437 ) $ (87,370 ) $ (5,338 ) Net actuarial gain (loss) 386 267 (10,029 ) (884 ) Amortization of prior service credit (46 ) — (45 ) — Amortization of actuarial loss 1,569 134 1,508 117 Settlement cost — — 2,060 — Ending balance $ (96,352 ) $ (6,036 ) $ (93,876 ) $ (6,105 ) Six Months Ended Six Months Ended June 30, 2018 June 30, 2019 Gains (Losses) Included in AOCL Pension Benefits Other Postretirement Benefits Pension Benefits Other Postretirement Benefits Beginning balance $ (97,226 ) $ (6,597 ) $ (88,602 ) $ (5,409 ) Net actuarial gain (loss) (5,558 ) 267 (10,029 ) (884 ) Amortization of prior service credit (91 ) — (90 ) — Amortization of actuarial loss 6,523 294 2,785 188 Settlement cost — — 2,060 — Ending balance $ (96,352 ) $ (6,036 ) $ (93,876 ) $ (6,105 ) Contributions estimated to be paid into the plans in 2019 are $31.6 million and $0.6 million for the pension plans and other postretirement benefit plan, respectively.

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	Leases As of January 1, 2019, we adopted ASU 2016-02, Leases (Topic 842) using the modified retrospective method of adoption. We elected to use the transition option that allows us to initially apply the new lease standard at the adoption date and recognize a cumulative-effect adjustment, if any, to the opening balance of retained earnings in the year of adoption. Comparable periods continue to be presented under the guidance of the previous standard, ASC 840. ASC 842 requires lessees to recognize a lease liability and right-of-use asset on the balance sheet for operating leases. For lessors, the new accounting model remains largely the same, although some changes have been made to align it with the new lessee model and the new revenue recognition guidance, ASC 606, Revenue from Contracts with Customers . Our adoption of ASC 842 did not result in any material adjustments to retained earnings, changes in the timing or amounts of lease costs or changes to our leverage ratio as defined in our credit agreement. We have both lessee and lessor arrangements. Our leases are evaluated at inception or at any subsequent modification. Depending on the terms, leases are classified as either operating or finance leases if we are the lessee, or as operating, sales-type or direct financing leases if we are the lessor, as appropriate under ASC 842. Our lessee arrangements primarily include a terminalling and storage contract where we have exclusive use of dedicated tankage, leased pipelines and office buildings. Our lessor arrangements include pipeline capacity and storage contracts and our condensate splitter tolling agreement that qualify as operating leases under ASC 842. In addition, we have a long-term throughput and deficiency agreement with a customer that is being accounted for as a sales-type lease under ASC 842. In accordance with ASC 842, we have made an accounting policy election to not apply the new standard to lessee arrangements with a term of one year or less and no purchase option that is reasonably certain of exercise. We will continue to account for these short-term arrangements by recognizing payments and expenses as incurred, without recording a lease liability and right-of-use asset. We have also made an accounting policy election for both our lessee and lessor arrangements to combine lease and non-lease components. This election is applied to all of our lease arrangements as our non-lease components are not material and do not result in significant timing differences in the recognition of rental expenses or income. Operating Leases – Lessee We recognize a lease liability for each lease based on the present value of remaining minimum fixed rental payments (which includes payments under any renewal option that we are reasonably certain to exercise), using a discount rate that approximates the rate of interest we would have to pay to borrow on a collateralized basis over a similar term. We also recognize a right-of-use asset for each lease, valued at the lease liability, adjusted for prepaid or accrued rent balances existing at the time of initial recognition. The lease liability and right-of-use asset are reduced over the term of the lease as payments are made and the assets are used. Related Party Operating Lease. In 2018, we entered into a long-term terminalling and storage contract with our equity investee, 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. This arrangement meets the definition of an operating lease, and our lease liability includes renewal options necessary to maintain control of the assets for a time period sufficient to meet our performance obligations to our third party customers. Minimum fixed rental payments are recognized on a straight-line basis over the life of the lease as costs and expenses on our consolidated statements of income. Variable and short-term rental payments are recognized as costs and expenses as they are incurred. Variable payments consist of amounts that exceed the contractual minimum rental payment (for example, payment increases tied to a change in a market index). Future minimum rental payments under operating leases with initial terms greater than one year as of June 30, 2019 are as follows (in thousands): Third Party Leases Seabrook Lease All Leases 2019 $ 12,961 $ 5,214 $ 18,175 2020 18,510 10,429 28,939 2021 18,875 8,973 27,848 2022 18,748 6,612 25,360 2023 18,225 6,612 24,837 Thereafter 33,676 37,473 71,149 Total future minimum rental payments 120,995 75,313 196,308 Present value discount 14,105 13,000 27,105 Total operating lease liability $ 106,890 $ 62,313 $ 169,203 The following tables provide further information about our operating leases (dollars in thousands): Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 Third Party Leases Seabrook Lease All Leases Third Party Leases Seabrook Lease All Leases Fixed lease cost $ 4,762 $ 2,588 $ 7,350 $ 9,583 $ 5,343 $ 14,926 Short-term lease cost 353 — 353 810 — 810 Variable lease cost 661 — 661 1,032 — 1,032 Total lease cost $ 5,776 $ 2,588 $ 8,364 $ 11,425 $ 5,343 $ 16,768 As of and for the Six Months Ended June 30, 2019 Third Party Leases Seabrook Lease All Leases Current lease liability $ 14,480 $ 7,997 $ 22,477 Long-term lease liability $ 92,411 $ 54,315 $ 146,726 Right-of-use asset $ 105,143 $ 62,313 $ 167,456 Operating cash flows from operating leases $ 6,663 5,363 $ 12,026 Weighted average remaining lease term (years) 7 9 8 Weighted-average discount rate 4.0% 4.2% 4.1% Rent expense was $9.5 million and $18.5 million , respectively, for three and six months ended June 30, 2018 and was recognized in accordance with ASC 840. Operating Leases – Lessor We recognize fixed rental income on a straight-line basis over the life of the lease as revenue on our consolidated statements of income. Variable rental payments are recognized as revenue in the period in which the circumstances on which the variable lease payments are based occur. Future minimum payments receivable under operating leases with terms greater than one year as of June 30, 2019 are estimated as follows (in thousands): 2019 $ 19,744 2020 33,584 2021 33,253 2022 23,544 2023 7,652 Thereafter 15,740 Total $ 133,517 We recognized variable lease revenue of $14.2 million and $27.9 million , respectively, for the three and six months ended June 30, 2019 , primarily related to our condensate splitter in Corpus Christi, Texas. At June 30, 2019 , property, plant and equipment utilized by our customers in operating lease arrangements consisted of: $226.5 million of processing equipment; $73.6 million of storage tanks; $53.5 million of pipeline and station equipment; and $26.7 million of other assets. The processing equipment primarily relates to our condensate splitter. Sales-Type Lease - Lessor We entered into a long-term throughput and deficiency agreement with a customer on a pipeline and related assets that we constructed in Texas and New Mexico, which contains minimum payment commitments. Our customer has the option to purchase this pipeline and related assets at the end of the lease term for a nominal amount. This agreement was previously accounted for as a direct-financing lease under ASC 840 and is now being accounted for as a sales-type lease under ASC 842. The net investment under this arrangement as of December 31, 2018 and June 30, 2019 was as follows (in thousands): December 31, 2018 June 30, Total minimum lease payments receivable $ 17,468 $ 16,594 Less: Unearned income 3,422 3,112 Recorded net investment in sales-type lease $ 14,046 $ 13,482 The net investment in sales-type leases was classified in the consolidated balance sheets as follows (in thousands): December 31, 2018 June 30, Other accounts receivable $ 1,138 $ 1,164 Long-term receivables 12,908 12,318 Total $ 14,046 $ 13,482 Future minimum payments receivable under this lease are $0.9 million in 2019, $1.7 million in 2020, $1.7 million in 2021, $1.7 million in 2022, $1.7 million in 2023 and $8.7 million thereafter.

Debt

Debt	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Debt	Debt Long-term debt at December 31, 2018 and June 30, 2019 was as follows (in thousands): December 31, June 30, Commercial paper $ — $ 197,000 6.55% Notes due 2019 550,000 — 4.25% Notes due 2021 550,000 550,000 3.20% Notes due 2025 250,000 250,000 5.00% Notes due 2026 650,000 650,000 6.40% Notes due 2037 250,000 250,000 4.20% Notes due 2042 250,000 250,000 5.15% Notes due 2043 550,000 550,000 4.20% Notes due 2045 250,000 250,000 4.25% Notes due 2046 500,000 500,000 4.20% Notes due 2047 500,000 500,000 4.85% Notes due 2049 — 500,000 Face value of long-term debt 4,300,000 4,447,000 Unamortized debt issuance costs (1) (27,070 ) (31,195 ) Net unamortized debt discount (1) (2,927 ) (8,012 ) Net unamortized amount of gains from historical fair value hedges (1) 866 — Long-term debt, net, including current portion 4,270,869 4,407,793 Less: Current portion of long-term debt, net 59,489 — Long-term debt, net $ 4,211,380 $ 4,407,793 (1) Debt issuance costs, note discounts and premiums and realized gains and losses of historical fair value hedges are being amortized or accreted to the applicable notes over the respective lives of those notes. All of the instruments detailed in the table above are senior indebtedness. 2019 Debt Issuance On January 18, 2019, we issued $500.0 million of 4.85% senior notes due 2049 in an underwritten public offering. The notes were issued at 99.371% of par. Net proceeds from this offering were approximately $491.5 million after underwriting discounts and offering expenses. The net proceeds from this offering along with cash on hand were used to early redeem our $550.0 million of 6.55% senior notes due 2019 on February 11, 2019. In connection with this offering, we recognized $8.3 million of debt prepayment costs that were recorded as interest expense in our consolidated statements of income. Other Debt Revolving Credit Facilities. At June 30, 2019 , 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 this 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 between 0.075% and 0.200% depending on our credit ratings. The unused commitment fee was 0.125% at June 30, 2019 . Borrowings under this facility may be used for general partnership purposes, including capital expenditures. As of December 31, 2018 and June 30, 2019 , there were no borrowings outstanding under this facility, with $6.8 million and $3.5 million , respectively, 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. In second quarter 2019, we entered into a $500.0 million 364 -day revolving credit facility, which matures in May 2020. Borrowings under this facility are unsecured and generally bear interest at LIBOR plus a spread ranging from 1.000% to 1.250% based on our credit ratings. Additionally, an unused commitment fee is assessed at a rate between 0.075% and 0.125% . The unused commitment fee was 0.100% at June 30, 2019 . Borrowings under this facility may be used for general purposes, including capital expenditures. As of June 30, 2019 , there were no borrowings outstanding 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. The weighted-average interest rate for commercial paper borrowings based on the number of days outstanding was 2.3% for the year ended December 31, 2018 and 2.7% for the six months ended June 30, 2019

Derivative Financial Instrument

Derivative Financial Instruments	6 Months Ended
	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Financial Instruments	Derivative Financial Instruments Interest Rate Derivatives We periodically enter into interest rate derivatives to hedge the fair value of debt or hedge against variability in interest rates. For interest rate cash flow hedges, we record the unrealized gains or losses as an adjustment to other comprehensive income. The realized gains and losses from our cash flow hedges are recognized into earnings as an adjustment to our periodic interest expenses over the life of the related debt issuance. For fair value hedges on long-term debt, we record the unrealized gains or losses as an adjustment to long-term debt, and realized amounts as an adjustment to our periodic interest expense. Adjustments resulting from discontinued hedges continue to be recognized in accordance with their historic hedging relationships. At June 30, 2019 , we had $100.0 million of treasury lock agreements outstanding to protect against the risk of variability of a portion of debt issuances we anticipate to occur in 2019. The fair value of these interest rate derivative agreements at June 30, 2019 was recorded as a current liability of $11.1 million , with the offset recorded to other comprehensive income. We account for these agreements as cash flow hedges. In first quarter 2019, upon issuance of $500.0 million of 4.85% notes due 2049, we terminated and settled $150.0 million of treasury lock agreements that we had previously entered into to protect against the variability of interest payments on this anticipated debt issuance for a loss of $8.0 million , which was included in our statements of cash flows as a net payment on financial derivatives. These agreements were accounted for as cash flow hedges. The loss was recorded to other comprehensive income and will be recognized into earnings as an adjustment to our periodic interest expense over the life of the debt issuance. Commodity Derivatives Our butane blending activities produce gasoline, and we can reasonably estimate the timing and quantities of sales of these products. We use a combination of exchange-traded commodities futures contracts and forward purchase and sale contracts to help manage commodity price changes and mitigate the risk of decline in the product margin realized from our butane blending activities. Further, certain of our other commercial operations generate petroleum products, and we also use futures contracts to hedge against price changes for some of these commodities. Forward physical purchase and sale contracts that qualify for and are elected as normal purchases and sales are accounted for using traditional accrual accounting, whereby changes in the mark-to-market values of such contracts are not recognized in income; rather the revenues and expenses associated with such transactions are recognized during the period when commodities are physically delivered or received. Forward physical commodity contracts subject to this exception are evaluated for the probability of future delivery and are periodically tested once the forecasted period has passed to determine whether similar forward contracts are probable of physical delivery in the future. We record the effective portion of the gains or losses for commodity-based contracts designated as fair value hedges as adjustments to the assets being hedged and the ineffective portions as well as amounts excluded from the assessment of hedge effectiveness as adjustments to other income or expense. We recognize the change in fair value of economic hedges that hedge against changes in the price of petroleum products that we expect to sell or purchase in the future currently in earnings as adjustments to product sales revenue, cost of product sales or operating expenses, as applicable. Our open futures contracts at June 30, 2019 were as follows: Type of Contract/Accounting Methodology Product Represented by the Contract and Associated Barrels Maturity Dates Futures - Economic Hedges 4.3 million barrels of refined products and crude oil Between July 2019 and April 2020 Futures - Economic Hedges 1.3 million barrels of butane and natural gasoline Between July 2019 and April 2020 Energy Commodity Derivatives Contracts and Deposits Offsets At June 30, 2019 , we had made margin deposits of $27.5 million for our future contracts with our counterparties, which were recorded as current assets under energy commodity derivatives deposits on our consolidated balance sheets. At December 31, 2018 we held margin deposits of $37.3 million for our future contracts with our counterparties, which were recorded as current liabilities under energy commodity derivatives deposits on our consolidated balance sheets. We have the right to offset the combined fair values of our open futures contracts against our margin deposits under a master netting arrangement for each counterparty; however, we have elected to present the combined fair values of our open futures contracts separately from the related margin deposits on our consolidated balance sheets. Additionally, we have the right to offset the fair values of our futures contracts together for each counterparty, which we have elected to do, and we report the combined net balances on our consolidated balance sheets. A schedule of the derivative amounts we have offset and the deposit amounts we could offset under a master netting arrangement are provided below as of December 31, 2018 and June 30, 2019 (in thousands): Description Gross Amounts of Recognized Assets (Liabilities) Gross Amounts of Assets (Liabilities) Offset in the Consolidated Balance Sheets Net Amounts of Assets (Liabilities) Presented in the Consolidated Balance Sheets Margin Deposit Amounts Not Offset in the Consolidated Balance Sheets Net Asset Amount (1) As of 12/31/2018 $ 62,166 $ (7,155 ) $ 55,011 $ (37,328 ) $ 17,683 As of 6/30/2019 $ (11,655 ) $ 2,558 $ (9,097 ) $ 27,533 $ 18,436 (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 currently in other operating income (expense) in our consolidated statements of income. The liability for this agreement at June 30, 2019 was $12.6 million . Impact of Derivatives on Our Financial Statements Comprehensive Income The changes in derivative activity included in AOCL for the three and six months ended June 30, 2018 and 2019 were as follows (in thousands): Three Months Ended Six Months Ended June 30, June 30, Derivative Losses Included in AOCL 2018 2019 2018 2019 Beginning balance $ (27,601 ) $ (30,229 ) $ (33,755 ) $ (26,480 ) Net gain (loss) on cash flow hedges 1,697 (6,659 ) 7,111 (11,035 ) Reclassification of net loss on cash flow hedges to income 739 601 1,479 1,228 Ending balance $ (25,165 ) $ (36,287 ) $ (25,165 ) $ (36,287 ) The following is a summary of the effect on our consolidated statements of income for the three and six months ended June 30, 2018 and 2019 of derivatives that were designated as cash flow hedges (in thousands): Interest Rate Contracts Amount of Gain (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 June 30, 2018 $ 1,697 Interest expense $ (739 ) Three Months Ended June 30, 2019 $ (6,659 ) Interest expense $ (601 ) Six Months Ended June 30, 2018 $ 7,111 Interest expense $ (1,479 ) Six Months Ended June 30, 2019 $ (11,035 ) Interest expense $ (1,228 ) As of June 30, 2019 , the net loss estimated to be classified to interest expense over the next twelve months from AOCL is approximately $2.4 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 and six months ended June 30, 2018 and 2019 of derivatives that were not designated as hedging instruments (in thousands): Amount of Gain (Loss) Recognized on Derivatives Three Months Ended Six Months Ended Location of Gain (Loss) Recognized on Derivatives June 30, June 30, Derivative Instrument 2018 2019 2018 2019 Futures contracts Product sales revenue $ (38,411 ) $ (4,619 ) $ (45,786 ) $ (59,130 ) Futures contracts Cost of product sales 8,337 (6,148 ) 4,393 (3,875 ) Basis derivative agreement Other operating income (expense) — (6,487 ) — (4,959 ) Total $ (30,074 ) $ (17,254 ) $ (41,393 ) $ (67,964 ) 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 designated as hedging instruments as of December 31, 2018 and June 30, 2019 (in thousands): December 31, 2018 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ 462 Energy commodity derivatives contracts, net $ — Interest rate contracts Other current assets 312 Other current liabilities 8,438 Total $ 774 Total $ 8,438 June 30, 2019 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate contracts Other current assets $ — Other current liabilities $ 11,133 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, 2018 and June 30, 2019 (in thousands): December 31, 2018 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ 61,704 Energy commodity derivatives contracts, net $ 7,155 June 30, 2019 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ 2,558 Energy commodity derivatives contracts, net $ 11,655 Basis derivative agreement Other current assets — Other current liabilities 4,979 Basis derivative agreement Other noncurrent assets — Other noncurrent liabilities 7,620 Total $ 2,558 Total $ 24,254

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
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 relating to butane blending at the Powder Springs facility located in Powder Springs, Georgia. Sunoco has since submitted pleadings alleging that Magellan has also infringed various patents relating to butane blending at nine Magellan facilities, in addition to Powder Springs. Sunoco is seeking an undetermined amount of damages, attorneys’ fees and a permanent injunction enjoining Magellan and Powder Springs from infringing on 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, based on our current understanding of the applicable facts and law, that 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 $20.5 million and $17.1 million at December 31, 2018 and June 30, 2019 , respectively. We have classified environmental liabilities as current or noncurrent based on management’s estimates regarding the timing of actual payments. Environmental expenses recognized as a result of changes in our environmental liabilities are generally included in operating expenses on our consolidated statements of income. Environmental expenses were $2.8 million and $1.4 million for the three months ended June 30, 2018 and 2019 , respectively, and $5.3 million and $3.4 million for the six months ended June 30, 2018 and 2019, respectively. Environmental Receivables Receivables from insurance carriers and other third parties related to environmental matters were $4.1 million at December 31, 2018 , of which $2.4 million and $1.7 million were recorded to other accounts receivable and long-term receivables, respectively, on our consolidated balance sheets. Receivables from insurance carriers and other third parties related to environmental matters were $2.8 million at June 30, 2019 , of which $1.0 million and $1.8 million were recorded to other accounts receivable and long-term receivables, respectively, on our consolidated balance sheets. Other We have entered into an agreement to guarantee our 50% pro rata share, up to $25.0 million , of obligations under Powder Springs’ credit facility. As of June 30, 2019 , 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.

Long-Term Incentive Plan

Long-Term Incentive Plan	6 Months Ended
	Jun. 30, 2019
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 limited partner units. The estimated units remaining available under the LTIP at June 30, 2019 total 1.6 million . Our equity-based incentive compensation expense was as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2018 2019 2018 2019 Performance-based awards $ 9,165 $ 9,317 $ 15,089 $ 12,961 Time-based awards 882 1,573 1,590 2,843 Total $ 10,047 $ 10,890 $ 16,679 $ 15,804 Allocation of LTIP expense on our consolidated statements of income: G&A expense $ 9,968 $ 10,802 $ 16,545 $ 15,673 Operating expense 79 88 134 131 Total $ 10,047 $ 10,890 $ 16,679 $ 15,804 On February 1, 2019, 347,473 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, 2021. Basic and Diluted Net Income Per Limited Partner Unit The difference between our actual limited partner units outstanding and our weighted-average number of limited partner 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 during a period. The difference between the weighted-average number of limited partner units outstanding used for basic and diluted net income per unit calculations on our consolidated statements of income is primarily the dilutive effect of unit awards associated with our LTIP that have not yet vested.

Partners' Capital and Distribut

Partners' Capital and Distributions	6 Months Ended
	Jun. 30, 2018
Partners' Capital Notes [Abstract]
Partners' Capital and Distributions	Partners’ Capital and Distributions Partners’ Capital In May 2017, we filed a prospectus supplement to the shelf registration statement for our continuous equity offering program (which we refer to as an at-the-market program, or “ATM”) pursuant to which we may issue up to $750.0 million of common units in amounts, at prices and on terms to be determined by market conditions at the time. The net proceeds from any sales under the ATM, after deducting the sales agents’ commissions and our offering expenses, will be used for general partnership purposes, including repayment of indebtedness or capital expenditures. No units have been issued pursuant to this program. The following table details the changes in the number of our limited partner units outstanding from December 31, 2018 through June 30, 2019 : Limited partner units outstanding on December 31, 2018 228,195,160 February 2019–Settlement of employee LTIP awards 199,792 During 2019–Other (a) 8,476 Limited partner units outstanding on June 30, 2019 228,403,428 (a) Limited partner units issued to settle the equity-based retainers paid to four independent directors of our general partner. Distributions Distributions we paid during 2018 and 2019 were as follows (in thousands, except per unit amounts): Payment Date Per Unit Cash Distribution Amount Total Cash Distribution to Limited Partners 02/14/2018 $ 0.9200 $ 209,940 05/15/2018 0.9375 213,933 Through 06/30/2018 1.8575 423,873 08/14/2018 0.9575 218,497 11/14/2018 0.9775 223,061 Total $ 3.7925 $ 865,431 02/14/2019 $ 0.9975 $ 227,832 05/15/2019 1.0050 229,545 Through 06/30/2019 2.0025 457,377 08/14/2019 (a) 1.0125 231,258 Total $ 3.0150 $ 688,635 (a) Our general partner’s board of directors declared this cash distribution in July 2019 to be paid on August 14, 2019 to unitholders of record at the close of business on August 7, 2019

Fair Value

Fair Value	6 Months Ended
	Jun. 30, 2019
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: • Energy commodity derivatives contracts . These include exchange-traded futures contracts related to petroleum products. These contracts are carried at fair value on our consolidated balance sheets and are valued based on quoted prices in active markets. See Note 9 – Derivative Financial Instruments for further disclosures regarding these contracts. • Interest rate contracts. These include forward-starting interest rate hedge agreements to protect against the risk of variability of interest payments on future debt. These contracts are carried at fair value on our consolidated balance sheets and are valued based on an assumed exchange, at the end of each period, in an orderly transaction with a participant in the market in which the financial instrument is traded. The exchange value was calculated using present value techniques on estimated future cash flows based on forward interest rate curves. See Note 9 – 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 9 - 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. At December 31, 2018, these guarantees primarily included an indemnification agreement we entered into with an affiliate of OMERS, the defined benefit pension plan for municipal employees in Ontario, Canada, in connection with the partial sale of our interest in BridgeTex. This indemnification was recorded at fair value on our consolidated balance sheets upon initial recognition, using probability-weighted potential outcome scenarios to estimate our possible liability for specific events covered by this indemnification. In first quarter 2019, certain litigation subject to the indemnification agreement was settled, which resulted in our paying $5.0 million under the indemnification agreement and recognizing the reduction of the remaining $11.0 million liability as an additional gain on disposition of assets on our consolidated statements of income. • Debt. The fair value of our publicly traded notes was based on the prices of those notes at December 31, 2018 and June 30, 2019 ; 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, 2018 and June 30, 2019 based on the three levels established by ASC 820, Fair Value Measurements and Disclosures (in thousands): December 31, 2018 Assets (Liabilities) Fair Value Measurements using: Carrying Amount Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Energy commodity derivatives contracts $ 55,011 $ 55,011 $ 55,011 $ — $ — Interest rate contracts $ (8,126 ) $ (8,126 ) $ — $ (8,126 ) $ — Long-term receivables $ 20,844 $ 20,844 $ — $ — $ 20,844 Guarantees $ (16,409 ) $ (16,409 ) $ — $ — $ (16,409 ) Debt $ (4,270,869 ) $ (4,224,373 ) $ — $ (4,224,373 ) $ — June 30, 2019 Assets (Liabilities) Fair Value Measurements using: Carrying Amount Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Energy commodity derivatives contracts $ (9,097 ) $ (9,097 ) $ (9,097 ) $ — $ — Interest rate contracts $ (11,133 ) $ (11,133 ) $ — $ (11,133 ) $ — Basis derivative agreement $ (12,599 ) $ (12,599 ) $ — $ (12,599 ) $ — Long-term receivables $ 21,304 $ 21,304 $ — $ — $ 21,304 Guarantees $ (408 ) $ (408 ) $ — $ — $ (408 ) Debt $ (4,407,793 ) $ (4,740,628 ) $ — $ (4,740,628 ) $ —

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Stacy Methvin is an independent member of our general partner’s board of directors and is also a director of one of our customers. We received tariff and other ancillary revenue from this customer of $4.6 million and $7.0 million for the three months ended June 30, 2018 and 2019 , respectively, and $8.4 million and $14.3 million for the six months ended June 30, 2018 and 2019 , respectively. We recorded receivables of $1.9 million and $2.0 million from this customer at December 31, 2018 and June 30, 2019 , respectively. The tariff revenue we recognized from this customer was in the normal course of business, with rates determined in accordance with published tariffs. We also made a one-time payment of $0.2 million in second quarter 2019 to a subsidiary of this customer for an easement related to one of our expansion projects. See Note 4 – Investments in Non-Controlled Entities

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Recognizable events No recognizable events occurred subsequent to June 30, 2019 . Non-recognizable events Cash Distribution. In July 2019, our general partner’s board of directors declared a quarterly cash distribution of $1.0125 per unit for the period of April 1, 2019 through June 30, 2019. This quarterly cash distribution will be paid on August 14, 2019 to unitholders of record on August 7, 2019 . The total cash distributions expected to be paid under this declaration are approximately $231.3 million .

Organization, Description of _2

Organization, Description of Business And Basis Of Presentation (Policies)	6 Months Ended
	Jun. 30, 2019
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, 2018 , which is derived from our audited financial statements, include all normal and recurring adjustments necessary to present fairly our financial position as of June 30, 2019 , the results of operations for the three and six months ended June 30, 2018 and 2019 and cash flows for the six months ended June 30, 2018 and 2019 . The results of operations for the six months ended June 30, 2019 are not necessarily indicative of the results to be expected for the full year ending December 31, 2019 for several reasons. Profits from our butane 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 do not include all of the information and notes normally included with financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”). 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, 2018 .
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 - Adopted by us on January 1, 2019 In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, Leases (Topic 842). This ASU requires lessees to recognize a right of use asset and lease liability on the balance sheet for all leases, with the exception of short-term leases. The new accounting model for lessors remains largely the same, although some changes have been made to align it with the new lessee model and the new revenue recognition guidance. This update also requires companies to include additional disclosures regarding their lessee and lessor agreements. We adopted this standard on January 1, 2019, and it did not have a material impact on our consolidated statements of income or our leverage ratio as defined in our credit agreement. Adoption of this ASU resulted in an initial increase in our assets and liabilities by approximately $172 million due to the recognition of right of use assets and lease liabilities. See Note 7 – Leases for our lease disclosures.
Lease Policy, Lessee and Lessor	As of January 1, 2019, we adopted ASU 2016-02, Leases (Topic 842) using the modified retrospective method of adoption. We elected to use the transition option that allows us to initially apply the new lease standard at the adoption date and recognize a cumulative-effect adjustment, if any, to the opening balance of retained earnings in the year of adoption. Comparable periods continue to be presented under the guidance of the previous standard, ASC 840. ASC 842 requires lessees to recognize a lease liability and right-of-use asset on the balance sheet for operating leases. For lessors, the new accounting model remains largely the same, although some changes have been made to align it with the new lessee model and the new revenue recognition guidance, ASC 606, Revenue from Contracts with Customers . Our adoption of ASC 842 did not result in any material adjustments to retained earnings, changes in the timing or amounts of lease costs or changes to our leverage ratio as defined in our credit agreement. We have both lessee and lessor arrangements. Our leases are evaluated at inception or at any subsequent modification. Depending on the terms, leases are classified as either operating or finance leases if we are the lessee, or as operating, sales-type or direct financing leases if we are the lessor, as appropriate under ASC 842. Our lessee arrangements primarily include a terminalling and storage contract where we have exclusive use of dedicated tankage, leased pipelines and office buildings. Our lessor arrangements include pipeline capacity and storage contracts and our condensate splitter tolling agreement that qualify as operating leases under ASC 842. In addition, we have a long-term throughput and deficiency agreement with a customer that is being accounted for as a sales-type lease under ASC 842. In accordance with ASC 842, we have made an accounting policy election to not apply the new standard to lessee arrangements with a term of one year or less and no purchase option that is reasonably certain of exercise. We will continue to account for these short-term arrangements by recognizing payments and expenses as incurred, without recording a lease liability and right-of-use asset. We have also made an accounting policy election for both our lessee and lessor arrangements to combine lease and non-lease components. This election is applied to all of our lease arrangements as our non-lease components are not material and do not result in significant timing differences in the recognition of rental expenses or income.
Lessee, Leases	We recognize a lease liability for each lease based on the present value of remaining minimum fixed rental payments (which includes payments under any renewal option that we are reasonably certain to exercise), using a discount rate that approximates the rate of interest we would have to pay to borrow on a collateralized basis over a similar term. We also recognize a right-of-use asset for each lease, valued at the lease liability, adjusted for prepaid or accrued rent balances existing at the time of initial recognition. The lease liability and right-of-use asset are reduced over the term of the lease as payments are made and the assets are used. Related Party Operating Lease. In 2018, we entered into a long-term terminalling and storage contract with our equity investee, 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. This arrangement meets the definition of an operating lease, and our lease liability includes renewal options necessary to maintain control of the assets for a time period sufficient to meet our performance obligations to our third party customers. Minimum fixed rental payments are recognized on a straight-line basis over the life of the lease as costs and expenses on our consolidated statements of income. Variable and short-term rental payments are recognized as costs and expenses as they are incurred. Variable payments consist of amounts that exceed the contractual minimum rental payment (for example, payment increases tied to a change in a market index).
Lessor, Leases	We recognize fixed rental income on a straight-line basis over the life of the lease as revenue on our consolidated statements of income. Variable rental payments are recognized as revenue in the period in which the circumstances on which the variable lease payments are based occur.

Revenue from Contract with Cu_2

Revenue from Contract with Customers (Tables)	6 Months Ended
	Jun. 30, 2019
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 June 30, 2018 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation $ 184,596 $ 84,755 $ — $ — $ 269,351 Terminalling 50,574 — 592 — 51,166 Storage 24,969 28,536 33,319 (915 ) 85,909 Ancillary services 28,459 8,199 6,037 — 42,695 Lease revenue 2,466 16,463 4,198 — 23,127 Transportation and terminals revenue 291,064 137,953 44,146 (915 ) 472,248 Product sales revenue 150,934 13,282 2,581 — 166,797 Affiliate management fee revenue 352 3,849 845 — 5,046 Total revenue 442,350 155,084 47,572 (915 ) 644,091 Revenue not under the guidance of ASC 606, Revenue from Contracts with Customers : Lease revenue (1) (2,466 ) (16,463 ) (4,198 ) — (23,127 ) Losses from futures contracts included in product sales revenue (2) 34,840 3,570 — — 38,410 Affiliate management fee revenue (352 ) (3,849 ) (845 ) — (5,046 ) Total revenue from contracts with customers under ASC 606 $ 474,372 $ 138,342 $ 42,529 $ (915 ) $ 654,328 (1) Lease revenue in 2018 is accounted for under ASC 840, Leases . (2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging . Three Months Ended June 30, 2019 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation $ 201,173 $ 91,534 $ — $ — $ 292,707 Terminalling 48,554 4,723 690 — 53,967 Storage 25,471 34,972 34,485 (1,341 ) 93,587 Ancillary services 28,128 6,611 6,581 — 41,320 Lease revenue 2,889 17,729 4,206 — 24,824 Transportation and terminals revenue 306,215 155,569 45,962 (1,341 ) 506,405 Product sales revenue 183,211 5,295 1,483 — 189,989 Affiliate management fee revenue 470 3,646 1,189 — 5,305 Total revenue 489,896 164,510 48,634 (1,341 ) 701,699 Revenue not under the guidance of ASC 606, Revenue from Contracts with Customers : Lease revenue (1) (2,889 ) (17,729 ) (4,206 ) — (24,824 ) (Gains) losses from futures contracts included in product sales revenue (2) 4,713 (95 ) — — 4,618 Affiliate management fee revenue (470 ) (3,646 ) (1,189 ) — (5,305 ) Total revenue from contracts with customers under ASC 606 $ 491,250 $ 143,040 $ 43,239 $ (1,341 ) $ 676,188 (1) Lease revenue in 2019 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 . Six Months Ended June 30, 2018 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation $ 351,498 $ 163,878 $ — $ — $ 515,376 Terminalling 89,922 — 1,304 — 91,226 Storage 50,216 58,526 67,530 (1,830 ) 174,442 Ancillary services 54,247 13,234 13,071 — 80,552 Lease revenue 5,575 28,573 8,441 — 42,589 Transportation and terminals revenue 551,458 264,211 90,346 (1,830 ) 904,185 Product sales revenue 383,708 19,721 4,960 — 408,389 Affiliate management fee revenue 649 7,865 1,782 — 10,296 Total revenue 935,815 291,797 97,088 (1,830 ) 1,322,870 Revenue not under the guidance of ASC 606, Revenue from Contracts with Customers : Lease revenue (1) (5,575 ) (28,573 ) (8,441 ) — (42,589 ) Losses from futures contracts included in product sales revenue (2) 40,305 5,480 — — 45,785 Affiliate management fee revenue (649 ) (7,865 ) (1,782 ) — (10,296 ) Total revenue from contracts with customers under ASC 606 $ 969,896 $ 260,839 $ 86,865 $ (1,830 ) $ 1,315,770 (1) Lease revenue in 2018 is accounted for under ASC 840, Leases . (2) The impact on product sales revenue from futures contracts falls under the guidance of ASC 815, Derivatives and Hedging . Six Months Ended June 30, 2019 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation $ 372,200 $ 176,692 $ — $ — $ 548,892 Terminalling 88,952 9,969 1,589 — 100,510 Storage 51,910 69,290 69,703 (2,279 ) 188,624 Ancillary services 54,024 12,632 13,466 — 80,122 Lease revenue 6,134 34,594 8,321 — 49,049 Transportation and terminals revenue 573,220 303,177 93,079 (2,279 ) 967,197 Product sales revenue 338,367 11,008 3,609 — 352,984 Affiliate management fee revenue 882 7,132 2,439 — 10,453 Total revenue 912,469 321,317 99,127 (2,279 ) 1,330,634 Revenue not under the guidance of ASC 606, Revenue from Contracts with Customers : Lease revenue (1) (6,134 ) (34,594 ) (8,321 ) — (49,049 ) Losses from futures contracts included in product sales revenue (2) 56,822 2,307 — — 59,129 Affiliate management fee revenue (882 ) (7,132 ) (2,439 ) — (10,453 ) Total revenue from contracts with customers under ASC 606 $ 962,275 $ 281,898 $ 88,367 $ (2,279 ) $ 1,330,261 (1) Lease revenue in 2019 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, 2018 June 30, 2019 Accounts receivable from contracts with customers $ 102,684 $ 134,506 Contract assets $ 8,487 $ 8,226 Contract liabilities $ 122,129 $ 115,692
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 June 30, 2019 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 Marine Storage Total Balances at June 30, 2019 $ 2,052,375 $ 1,244,128 $ 221,848 $ 3,518,351 Remaining terms 1 - 19 years 1 - 10 years 1 - 5 years Estimated revenues from UPOs to be recognized in the next 12 months $ 273,714 $ 330,830 $ 114,166 $ 718,710

Segment Disclosures (Tables)

Segment Disclosures (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Schedule of Business Segment Reporting Information	Three Months Ended June 30, 2018 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 291,064 $ 137,953 $ 44,146 $ (915 ) $ 472,248 Product sales revenue 150,934 13,282 2,581 — 166,797 Affiliate management fee revenue 352 3,849 845 — 5,046 Total revenue 442,350 155,084 47,572 (915 ) 644,091 Operating expenses 113,342 31,177 17,693 (2,367 ) 159,845 Cost of product sales 137,543 13,761 2,375 — 153,679 (Earnings) losses of non-controlled entities 97 (41,851 ) (756 ) — (42,510 ) Operating margin 191,368 151,997 28,260 1,452 373,077 Depreciation, amortization and impairment expense 30,508 12,741 8,918 1,452 53,619 G&A expense 33,187 13,455 6,648 — 53,290 Operating profit $ 127,673 $ 125,801 $ 12,694 $ — $ 266,168 Three Months Ended June 30, 2019 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 306,215 $ 155,569 $ 45,962 $ (1,341 ) $ 506,405 Product sales revenue 183,211 5,295 1,483 — 189,989 Affiliate management fee revenue 470 3,646 1,189 — 5,305 Total revenue 489,896 164,510 48,634 (1,341 ) 701,699 Operating expenses 115,811 37,217 18,586 (2,685 ) 168,929 Cost of product sales 146,516 4,710 1,650 — 152,876 Other operating (income) expense (738 ) 6,056 (294 ) — 5,024 (Earnings) losses of non-controlled entities 4,218 (43,735 ) (1,268 ) — (40,785 ) Operating margin 224,089 160,262 29,960 1,344 415,655 Depreciation, amortization and impairment expense 34,738 15,743 10,705 1,344 62,530 G&A expense 31,020 14,097 7,266 — 52,383 Operating profit $ 158,331 $ 130,422 $ 11,989 $ — $ 300,742 Six Months Ended June 30, 2018 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 551,458 $ 264,211 $ 90,346 $ (1,830 ) $ 904,185 Product sales revenue 383,708 19,721 4,960 — 408,389 Affiliate management fee revenue 649 7,865 1,782 — 10,296 Total revenue 935,815 291,797 97,088 (1,830 ) 1,322,870 Operating expenses 207,391 64,768 35,657 (4,675 ) 303,141 Cost of product sales 327,876 20,811 4,584 — 353,271 Earnings of non-controlled entities (2,221 ) (73,459 ) (1,368 ) — (77,048 ) Operating margin 402,769 279,677 58,215 2,845 743,506 Depreciation, amortization and impairment expense 59,415 25,503 17,735 2,845 105,498 G&A expense 62,074 25,361 12,411 — 99,846 Operating profit $ 281,280 $ 228,813 $ 28,069 $ — $ 538,162 Six Months Ended June 30, 2019 Refined Products Crude Oil Marine Storage Intersegment Eliminations Total Transportation and terminals revenue $ 573,220 $ 303,177 $ 93,079 $ (2,279 ) $ 967,197 Product sales revenue 338,367 11,008 3,609 — 352,984 Affiliate management fee revenue 882 7,132 2,439 — 10,453 Total revenue 912,469 321,317 99,127 (2,279 ) 1,330,634 Operating expenses 205,489 81,040 33,483 (5,058 ) 314,954 Cost of product sales 306,670 11,374 3,926 — 321,970 Other operating (income) expense (1,352 ) 4,483 (5,048 ) — (1,917 ) (Earnings) losses of non-controlled entities 5,648 (76,037 ) (1,651 ) — (72,040 ) Operating margin 396,014 300,457 68,417 2,779 767,667 Depreciation, amortization and impairment expense 70,272 31,002 20,348 2,779 124,401 G&A expense 58,735 26,712 12,931 — 98,378 Operating profit $ 267,007 $ 242,743 $ 35,138 $ — $ 544,888

Investments in Non-Controlled_2

Investments in Non-Controlled Entities (Tables)	6 Months Ended
	Jun. 30, 2019
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Our investments in non-controlled entities at June 30, 2019 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”) 50% Powder Springs Logistics, LLC (“Powder Springs”) 50% Saddlehorn Pipeline Company, LLC (“Saddlehorn”) 40% Seabrook Logistics, LLC (“Seabrook”) 50% Texas Frontera, LLC (“Texas Frontera”) 50% 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 $1.1 million during the three months ended June 30, 2018 and 2019, respectively, and $1.7 million and $2.6 million during the six months ended June 30, 2018 and 2019 , 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 June 30, Six Months Ended June 30, 2018 2019 2018 2019 Transportation and terminals revenue: BridgeTex, pipeline capacity and storage $ 9,697 $ 10,181 $ 19,561 $ 20,326 Double Eagle, throughput revenue $ 1,343 $ 1,572 $ 2,887 $ 3,231 Saddlehorn, storage revenue $ 538 $ 551 $ 1,076 $ 1,103 Operating costs: Seabrook, storage lease and ancillary services $ — $ 6,241 $ — $ 13,150 Product sales revenue: Powder Springs, butane sales $ 2,180 $ — $ 4,899 $ — Cost of product sales: Powder Springs, butane purchases $ 410 $ — $ 410 $ — Our consolidated balance sheets reflected the following balances related to our investments in non-controlled entities (in thousands): December 31, 2018 Trade Accounts Receivable Other Accounts Receivable Other Accounts Payable Long-Term Receivables BridgeTex $ 318 $ 1,549 $ — $ — Double Eagle $ 546 $ — $ — $ — MVP $ — $ 397 $ — $ — Powder Springs $ — $ — $ — $ 2,221 Saddlehorn $ — $ 183 $ — $ — Seabrook $ — $ — $ 1,140 $ — June 30, 2019 Trade Accounts Receivable Other Accounts Receivable Other Accounts Payable Long-Term Receivables BridgeTex $ — $ 31 $ 530 $ — Double Eagle $ 569 $ — $ — $ — MVP $ — $ 387 $ — $ — Powder Springs $ 144 $ 5 $ — $ 3,824 Saddlehorn $ 184 $ 123 $ — $ — Seabrook $ — $ 252 $ 1,195 $ — The financial results from MVP and Texas Frontera are included in our marine storage segment, the financial results from BridgeTex, Double Eagle, HoustonLink, Saddlehorn and Seabrook are included in our crude oil segment and the financial results from Powder Springs are included in our refined products segment, each as earnings of non-controlled entities. A summary of our investments in non-controlled entities follows (in thousands): Investments at 12/31/2018 $ 1,076,306 Additional investment 112,251 Indemnification settlement (5,000 ) Earnings of non-controlled entities: Proportionate share of earnings 72,968 Amortization of excess investment and capitalized interest (928 ) Earnings of non-controlled entities 72,040 Less: Distributions from operations of non-controlled entities 83,069 Distributions from returns of investments in non-controlled entities 7,500 Investments at 6/30/2019 $ 1,165,028

Inventory (Tables)

Inventory (Tables)	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Schedule of Inventory	Inventory at December 31, 2018 and June 30, 2019 was as follows (in thousands): December 31, 2018 June 30, Refined products $ 92,751 $ 72,219 Liquefied petroleum gases 46,612 46,294 Transmix 28,497 32,891 Crude oil 11,220 15,051 Additives 6,655 6,452 Total inventory $ 185,735 $ 172,907

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2019
Retirement Benefits [Abstract]
Schedule of Consolidated Net Periodic Benefit Costs	Net periodic benefit expense for the three and six months ended June 30, 2018 and 2019 was as follows (in thousands): Three Months Ended Three Months Ended June 30, 2018 June 30, 2019 Pension Benefits Other Postretirement Benefits Pension Benefits Other Postretirement Benefits Components of net periodic benefit costs: Service cost $ 6,269 $ 51 $ 6,358 $ 43 Interest cost 2,795 102 3,110 135 Expected return on plan assets (3,024 ) — (2,317 ) — Amortization of prior service credit (46 ) — (45 ) — Amortization of actuarial loss 1,569 134 1,508 117 Settlement cost — — 2,060 — Net periodic benefit cost $ 7,563 $ 287 $ 10,674 $ 295 Six Months Ended Six Months Ended June 30, 2018 June 30, 2019 Pension Benefits Other Postretirement Benefits Pension Benefits Other Postretirement Benefits Components of net periodic benefit costs: Service cost $ 21,969 $ 116 $ 12,885 $ 97 Interest cost 9,238 208 6,110 254 Expected return on plan assets (6,002 ) — (4,691 ) — Amortization of prior service credit (91 ) — (90 ) — Amortization of actuarial loss 6,523 294 2,785 188 Settlement cost — — 2,060 — Net periodic benefit cost $ 31,637 $ 618 $ 19,059 $ 539 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.
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 and six months ended June 30, 2018 and 2019 were as follows (in thousands): Three Months Ended Three Months Ended June 30, 2018 June 30, 2019 Gains (Losses) Included in AOCL Pension Benefits Other Postretirement Benefits Pension Benefits Other Postretirement Benefits Beginning balance $ (98,261 ) $ (6,437 ) $ (87,370 ) $ (5,338 ) Net actuarial gain (loss) 386 267 (10,029 ) (884 ) Amortization of prior service credit (46 ) — (45 ) — Amortization of actuarial loss 1,569 134 1,508 117 Settlement cost — — 2,060 — Ending balance $ (96,352 ) $ (6,036 ) $ (93,876 ) $ (6,105 ) Six Months Ended Six Months Ended June 30, 2018 June 30, 2019 Gains (Losses) Included in AOCL Pension Benefits Other Postretirement Benefits Pension Benefits Other Postretirement Benefits Beginning balance $ (97,226 ) $ (6,597 ) $ (88,602 ) $ (5,409 ) Net actuarial gain (loss) (5,558 ) 267 (10,029 ) (884 ) Amortization of prior service credit (91 ) — (90 ) — Amortization of actuarial loss 6,523 294 2,785 188 Settlement cost — — 2,060 — Ending balance $ (96,352 ) $ (6,036 ) $ (93,876 ) $ (6,105 )

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Lessee, Operating Lease, Liability, Maturity	Future minimum rental payments under operating leases with initial terms greater than one year as of June 30, 2019 are as follows (in thousands): Third Party Leases Seabrook Lease All Leases 2019 $ 12,961 $ 5,214 $ 18,175 2020 18,510 10,429 28,939 2021 18,875 8,973 27,848 2022 18,748 6,612 25,360 2023 18,225 6,612 24,837 Thereafter 33,676 37,473 71,149 Total future minimum rental payments 120,995 75,313 196,308 Present value discount 14,105 13,000 27,105 Total operating lease liability $ 106,890 $ 62,313 $ 169,203
Lessee, Operating Lease, Disclosure	The following tables provide further information about our operating leases (dollars in thousands): Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 Third Party Leases Seabrook Lease All Leases Third Party Leases Seabrook Lease All Leases Fixed lease cost $ 4,762 $ 2,588 $ 7,350 $ 9,583 $ 5,343 $ 14,926 Short-term lease cost 353 — 353 810 — 810 Variable lease cost 661 — 661 1,032 — 1,032 Total lease cost $ 5,776 $ 2,588 $ 8,364 $ 11,425 $ 5,343 $ 16,768 As of and for the Six Months Ended June 30, 2019 Third Party Leases Seabrook Lease All Leases Current lease liability $ 14,480 $ 7,997 $ 22,477 Long-term lease liability $ 92,411 $ 54,315 $ 146,726 Right-of-use asset $ 105,143 $ 62,313 $ 167,456 Operating cash flows from operating leases $ 6,663 5,363 $ 12,026 Weighted average remaining lease term (years) 7 9 8 Weighted-average discount rate 4.0% 4.2% 4.1%
Schedule of Future Minimum Rental Payments for Operating Leases	Future minimum payments receivable under operating leases with terms greater than one year as of June 30, 2019 are estimated as follows (in thousands): 2019 $ 19,744 2020 33,584 2021 33,253 2022 23,544 2023 7,652 Thereafter 15,740 Total $ 133,517
Sales-type and Direct Financing Leases, Lease Receivable, Maturity	The net investment under this arrangement as of December 31, 2018 and June 30, 2019 was as follows (in thousands): December 31, 2018 June 30, Total minimum lease payments receivable $ 17,468 $ 16,594 Less: Unearned income 3,422 3,112 Recorded net investment in sales-type lease $ 14,046 $ 13,482 The net investment in sales-type leases was classified in the consolidated balance sheets as follows (in thousands): December 31, 2018 June 30, Other accounts receivable $ 1,138 $ 1,164 Long-term receivables 12,908 12,318 Total $ 14,046 $ 13,482 Future minimum payments receivable under this lease are $0.9 million in 2019, $1.7 million in 2020, $1.7 million in 2021, $1.7 million in 2022, $1.7 million in 2023 and $8.7 million thereafter.

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Consolidated Debt	Long-term debt at December 31, 2018 and June 30, 2019 was as follows (in thousands): December 31, June 30, Commercial paper $ — $ 197,000 6.55% Notes due 2019 550,000 — 4.25% Notes due 2021 550,000 550,000 3.20% Notes due 2025 250,000 250,000 5.00% Notes due 2026 650,000 650,000 6.40% Notes due 2037 250,000 250,000 4.20% Notes due 2042 250,000 250,000 5.15% Notes due 2043 550,000 550,000 4.20% Notes due 2045 250,000 250,000 4.25% Notes due 2046 500,000 500,000 4.20% Notes due 2047 500,000 500,000 4.85% Notes due 2049 — 500,000 Face value of long-term debt 4,300,000 4,447,000 Unamortized debt issuance costs (1) (27,070 ) (31,195 ) Net unamortized debt discount (1) (2,927 ) (8,012 ) Net unamortized amount of gains from historical fair value hedges (1) 866 — Long-term debt, net, including current portion 4,270,869 4,407,793 Less: Current portion of long-term debt, net 59,489 — Long-term debt, net $ 4,211,380 $ 4,407,793 (1) Debt issuance costs, note discounts and premiums and realized gains and losses of historical fair value hedges are being amortized or accreted to the applicable notes over the respective lives of those notes.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule Of NYMEX Contracts And Butane Price Swap Purchase Agreements	Our open futures contracts at June 30, 2019 were as follows: Type of Contract/Accounting Methodology Product Represented by the Contract and Associated Barrels Maturity Dates Futures - Economic Hedges 4.3 million barrels of refined products and crude oil Between July 2019 and April 2020 Futures - Economic Hedges 1.3 million barrels of butane and natural gasoline Between July 2019 and April 2020
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, 2018 and June 30, 2019 (in thousands): Description Gross Amounts of Recognized Assets (Liabilities) Gross Amounts of Assets (Liabilities) Offset in the Consolidated Balance Sheets Net Amounts of Assets (Liabilities) Presented in the Consolidated Balance Sheets Margin Deposit Amounts Not Offset in the Consolidated Balance Sheets Net Asset Amount (1) As of 12/31/2018 $ 62,166 $ (7,155 ) $ 55,011 $ (37,328 ) $ 17,683 As of 6/30/2019 $ (11,655 ) $ 2,558 $ (9,097 ) $ 27,533 $ 18,436 (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 currently in other operating income (expense) in our consolidated statements of income. The liability for this agreement at June 30, 2019 was $12.6 million .
Derivative Gains Included in Accumulated Other Comprehensive Loss (AOCL)	The changes in derivative activity included in AOCL for the three and six months ended June 30, 2018 and 2019 were as follows (in thousands): Three Months Ended Six Months Ended June 30, June 30, Derivative Losses Included in AOCL 2018 2019 2018 2019 Beginning balance $ (27,601 ) $ (30,229 ) $ (33,755 ) $ (26,480 ) Net gain (loss) on cash flow hedges 1,697 (6,659 ) 7,111 (11,035 ) Reclassification of net loss on cash flow hedges to income 739 601 1,479 1,228 Ending balance $ (25,165 ) $ (36,287 ) $ (25,165 ) $ (36,287 )
Derivatives and Hedging-Cash Flow Hedges	The following is a summary of the effect on our consolidated statements of income for the three and six months ended June 30, 2018 and 2019 of derivatives that were designated as cash flow hedges (in thousands): Interest Rate Contracts Amount of Gain (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 June 30, 2018 $ 1,697 Interest expense $ (739 ) Three Months Ended June 30, 2019 $ (6,659 ) Interest expense $ (601 ) Six Months Ended June 30, 2018 $ 7,111 Interest expense $ (1,479 ) Six Months Ended June 30, 2019 $ (11,035 ) Interest expense $ (1,228 )
Derivatives and Hedging-Overall-Subsequent Measurement	The following table provides a summary of the effect on our consolidated statements of income for the three and six months ended June 30, 2018 and 2019 of derivatives that were not designated as hedging instruments (in thousands): Amount of Gain (Loss) Recognized on Derivatives Three Months Ended Six Months Ended Location of Gain (Loss) Recognized on Derivatives June 30, June 30, Derivative Instrument 2018 2019 2018 2019 Futures contracts Product sales revenue $ (38,411 ) $ (4,619 ) $ (45,786 ) $ (59,130 ) Futures contracts Cost of product sales 8,337 (6,148 ) 4,393 (3,875 ) Basis derivative agreement Other operating income (expense) — (6,487 ) — (4,959 ) Total $ (30,074 ) $ (17,254 ) $ (41,393 ) $ (67,964 )
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 designated as hedging instruments as of December 31, 2018 and June 30, 2019 (in thousands): December 31, 2018 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ 462 Energy commodity derivatives contracts, net $ — Interest rate contracts Other current assets 312 Other current liabilities 8,438 Total $ 774 Total $ 8,438 June 30, 2019 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Interest rate contracts Other current assets $ — Other current liabilities $ 11,133 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, 2018 and June 30, 2019 (in thousands): December 31, 2018 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ 61,704 Energy commodity derivatives contracts, net $ 7,155 June 30, 2019 Asset Derivatives Liability Derivatives Derivative Instrument Balance Sheet Location Fair Value Balance Sheet Location Fair Value Futures contracts Energy commodity derivatives contracts, net $ 2,558 Energy commodity derivatives contracts, net $ 11,655 Basis derivative agreement Other current assets — Other current liabilities 4,979 Basis derivative agreement Other noncurrent assets — Other noncurrent liabilities 7,620 Total $ 2,558 Total $ 24,254

Long-Term Incentive Plan (Table

Long-Term Incentive Plan (Tables)	6 Months Ended
	Jun. 30, 2019
Share-based Payment Arrangement [Abstract]
Equity-Based Incentive Compensation Expense	Our equity-based incentive compensation expense was as follows (in thousands): Three Months Ended June 30, Six Months Ended June 30, 2018 2019 2018 2019 Performance-based awards $ 9,165 $ 9,317 $ 15,089 $ 12,961 Time-based awards 882 1,573 1,590 2,843 Total $ 10,047 $ 10,890 $ 16,679 $ 15,804 Allocation of LTIP expense on our consolidated statements of income: G&A expense $ 9,968 $ 10,802 $ 16,545 $ 15,673 Operating expense 79 88 134 131 Total $ 10,047 $ 10,890 $ 16,679 $ 15,804

Partners' Capital and Distrib_2

Partners' Capital and Distributions (Tables)	6 Months Ended
	Jun. 30, 2019
Partners' Capital Notes [Abstract]
Schedule of Capital Units	The following table details the changes in the number of our limited partner units outstanding from December 31, 2018 through June 30, 2019 : Limited partner units outstanding on December 31, 2018 228,195,160 February 2019–Settlement of employee LTIP awards 199,792 During 2019–Other (a) 8,476 Limited partner units outstanding on June 30, 2019 228,403,428 (a) Limited partner units issued to settle the equity-based retainers paid to four independent directors of our general partner.
Schedule of Distributions	Distributions we paid during 2018 and 2019 were as follows (in thousands, except per unit amounts): Payment Date Per Unit Cash Distribution Amount Total Cash Distribution to Limited Partners 02/14/2018 $ 0.9200 $ 209,940 05/15/2018 0.9375 213,933 Through 06/30/2018 1.8575 423,873 08/14/2018 0.9575 218,497 11/14/2018 0.9775 223,061 Total $ 3.7925 $ 865,431 02/14/2019 $ 0.9975 $ 227,832 05/15/2019 1.0050 229,545 Through 06/30/2019 2.0025 457,377 08/14/2019 (a) 1.0125 231,258 Total $ 3.0150 $ 688,635 (a) Our general partner’s board of directors declared this cash distribution in July 2019 to be paid on August 14, 2019 to unitholders of record at the close of business on August 7, 2019 .

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Jun. 30, 2019
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, 2018 and June 30, 2019 based on the three levels established by ASC 820, Fair Value Measurements and Disclosures (in thousands): December 31, 2018 Assets (Liabilities) Fair Value Measurements using: Carrying Amount Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Energy commodity derivatives contracts $ 55,011 $ 55,011 $ 55,011 $ — $ — Interest rate contracts $ (8,126 ) $ (8,126 ) $ — $ (8,126 ) $ — Long-term receivables $ 20,844 $ 20,844 $ — $ — $ 20,844 Guarantees $ (16,409 ) $ (16,409 ) $ — $ — $ (16,409 ) Debt $ (4,270,869 ) $ (4,224,373 ) $ — $ (4,224,373 ) $ — June 30, 2019 Assets (Liabilities) Fair Value Measurements using: Carrying Amount Fair Value Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Energy commodity derivatives contracts $ (9,097 ) $ (9,097 ) $ (9,097 ) $ — $ — Interest rate contracts $ (11,133 ) $ (11,133 ) $ — $ (11,133 ) $ — Basis derivative agreement $ (12,599 ) $ (12,599 ) $ — $ (12,599 ) $ — Long-term receivables $ 21,304 $ 21,304 $ — $ — $ 21,304 Guarantees $ (408 ) $ (408 ) $ — $ — $ (408 ) Debt $ (4,407,793 ) $ (4,740,628 ) $ — $ (4,740,628 ) $ —

Organization, Description of _3

Organization, Description of Business and Basis of Presentation (Narrative) (Details) bbl in Millions, $ in Millions	Jan. 01, 2019USD ($)	Jun. 30, 2019Terminalbblmi
Refined Products Segment [Member]
Organization and Description of Business [Line Items]
Number of Pipeline Terminals | Terminal		53
Number of Independent Terminals | Terminal		25
Refined Products Segment [Member] | Refined Products Transportation Services [Member]
Organization and Description of Business [Line Items]
Pipeline Length | mi		9,700
Refined Products Segment [Member] | Ammonia Transportation Services [Member]
Organization and Description of Business [Line Items]
Pipeline Length | mi		1,100
Crude Oil Pipeline and Terminals Segment [Member]
Organization and Description of Business [Line Items]
Pipeline Length | mi		2,200
Storage Capacity		33
Contracted Storage		21
Pipeline, Length - Wholly Owned | mi		1,000
Storage Capacity - Wholly Owned		28
Contracted Storage - Wholly Owned		19
Marine Storage Segment [Member]
Organization and Description of Business [Line Items]
Number of Independent Terminals | Terminal		6
Storage Capacity		27
Storage Capacity - Wholly Owned		25
Number of Independent Terminals - Wholly Owned | Terminal		5
Accounting Standards Update 2016-02 [Member] | Assets, Total [Member]
Organization and Description of Business [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | $	$ 172
Accounting Standards Update 2016-02 [Member] | Liabilities, Total [Member]
Organization and Description of Business [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | $	$ 172

Revenue from Contract with Cu_3

Revenue from Contract with Customers (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Deferred Revenue, Revenue Recognized	$ 13.8	$ 84

Revenue from Contract with Cu_4

Revenue from Contract with Customers ( Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenue	$ 701,699	$ 644,091	$ 1,330,634	$ 1,322,870
Operating Leases, Income Statement, Lease Revenue		23,127		42,589
Operating Lease, Lease Income	24,824		49,049
Unrealized Gain (Loss) on Derivatives	4,618	38,410	59,129	45,785
Affiliate management fee revenue	(5,305)	(5,046)	(10,453)	(10,296)
Revenue from Contract with Customer, Including Assessed Tax	676,188	654,328	1,330,261	1,315,770
Service [Member]
Disaggregation of Revenue [Line Items]
Revenue	506,405	472,248	967,197	904,185
Product [Member]
Disaggregation of Revenue [Line Items]
Revenue	189,989	166,797	352,984	408,389
Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,305	5,046	10,453	10,296
Operating Segments [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	489,896	442,350	912,469	935,815
Operating Leases, Income Statement, Lease Revenue		2,466		5,575
Operating Lease, Lease Income	2,889		6,134
Unrealized Gain (Loss) on Derivatives	4,713	34,840	56,822	40,305
Affiliate management fee revenue	(470)	(352)	(882)	(649)
Revenue from Contract with Customer, Including Assessed Tax	491,250	474,372	962,275	969,896
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	164,510	155,084	321,317	291,797
Operating Leases, Income Statement, Lease Revenue		16,463		28,573
Operating Lease, Lease Income	17,729		34,594
Unrealized Gain (Loss) on Derivatives	(95)	3,570	2,307	5,480
Affiliate management fee revenue	(3,646)	(3,849)	(7,132)	(7,865)
Revenue from Contract with Customer, Including Assessed Tax	143,040	138,342	281,898	260,839
Operating Segments [Member] | Marine Storage Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	48,634	47,572	99,127	97,088
Operating Leases, Income Statement, Lease Revenue		4,198		8,441
Operating Lease, Lease Income	4,206		8,321
Unrealized Gain (Loss) on Derivatives	0	0	0	0
Affiliate management fee revenue	(1,189)	(845)	(2,439)	(1,782)
Revenue from Contract with Customer, Including Assessed Tax	43,239	42,529	88,367	86,865
Operating Segments [Member] | Service [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	306,215	291,064	573,220	551,458
Operating Segments [Member] | Service [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	155,569	137,953	303,177	264,211
Operating Segments [Member] | Service [Member] | Marine Storage Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	45,962	44,146	93,079	90,346
Operating Segments [Member] | Product [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	183,211	150,934	338,367	383,708
Operating Segments [Member] | Product [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,295	13,282	11,008	19,721
Operating Segments [Member] | Product [Member] | Marine Storage Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,483	2,581	3,609	4,960
Operating Segments [Member] | Product and Service, Other [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	470	352	882	649
Operating Segments [Member] | Product and Service, Other [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	3,646	3,849	7,132	7,865
Operating Segments [Member] | Product and Service, Other [Member] | Marine Storage Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,189	845	2,439	1,782
Intersegment Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenue	(1,341)	(915)	(2,279)	(1,830)
Operating Leases, Income Statement, Lease Revenue		0		0
Operating Lease, Lease Income	0		0
Unrealized Gain (Loss) on Derivatives	0	0	0	0
Affiliate management fee revenue	0	0	0	0
Revenue from Contract with Customer, Including Assessed Tax	(1,341)	(915)	(2,279)	(1,830)
Intersegment Eliminations [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenue	(1,341)	(915)	(2,279)	(1,830)
Intersegment Eliminations [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Intersegment Eliminations [Member] | Product and Service, Other [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Transferred over Time [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenue	506,405	472,248	967,197	904,185
Transferred over Time [Member] | Transportation [Member]
Disaggregation of Revenue [Line Items]
Revenue	292,707	269,351	548,892	515,376
Transferred over Time [Member] | Terminalling [Member]
Disaggregation of Revenue [Line Items]
Revenue	53,967	51,166	100,510	91,226
Transferred over Time [Member] | Storage [Member]
Disaggregation of Revenue [Line Items]
Revenue	93,587	85,909	188,624	174,442
Transferred over Time [Member] | Ancillary Services [Member]
Disaggregation of Revenue [Line Items]
Revenue	41,320	42,695	80,122	80,552
Transferred over Time [Member] | Lease Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue	24,824	23,127	49,049	42,589
Transferred over Time [Member] | Operating Segments [Member] | Service [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	306,215	291,064	573,220	551,458
Transferred over Time [Member] | Operating Segments [Member] | Service [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	155,569	137,953	303,177	264,211
Transferred over Time [Member] | Operating Segments [Member] | Service [Member] | Marine Storage Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	45,962	44,146	93,079	90,346
Transferred over Time [Member] | Operating Segments [Member] | Transportation [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	201,173	184,596	372,200	351,498
Transferred over Time [Member] | Operating Segments [Member] | Transportation [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	91,534	84,755	176,692	163,878
Transferred over Time [Member] | Operating Segments [Member] | Transportation [Member] | Marine Storage Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Transferred over Time [Member] | Operating Segments [Member] | Terminalling [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	48,554	50,574	88,952	89,922
Transferred over Time [Member] | Operating Segments [Member] | Terminalling [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	4,723	0	9,969	0
Transferred over Time [Member] | Operating Segments [Member] | Terminalling [Member] | Marine Storage Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	690	592	1,589	1,304
Transferred over Time [Member] | Operating Segments [Member] | Storage [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	25,471	24,969	51,910	50,216
Transferred over Time [Member] | Operating Segments [Member] | Storage [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	34,972	28,536	69,290	58,526
Transferred over Time [Member] | Operating Segments [Member] | Storage [Member] | Marine Storage Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	34,485	33,319	69,703	67,530
Transferred over Time [Member] | Operating Segments [Member] | Ancillary Services [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	28,128	28,459	54,024	54,247
Transferred over Time [Member] | Operating Segments [Member] | Ancillary Services [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,611	8,199	12,632	13,234
Transferred over Time [Member] | Operating Segments [Member] | Ancillary Services [Member] | Marine Storage Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,581	6,037	13,466	13,071
Transferred over Time [Member] | Operating Segments [Member] | Lease Revenue [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,889	2,466	6,134	5,575
Transferred over Time [Member] | Operating Segments [Member] | Lease Revenue [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	17,729	16,463	34,594	28,573
Transferred over Time [Member] | Operating Segments [Member] | Lease Revenue [Member] | Marine Storage Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	4,206	4,198	8,321	8,441
Transferred over Time [Member] | Intersegment Eliminations [Member] | Service [Member]
Disaggregation of Revenue [Line Items]
Revenue	(1,341)	(915)	(2,279)	(1,830)
Transferred over Time [Member] | Intersegment Eliminations [Member] | Transportation [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Transferred over Time [Member] | Intersegment Eliminations [Member] | Terminalling [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Transferred over Time [Member] | Intersegment Eliminations [Member] | Storage [Member]
Disaggregation of Revenue [Line Items]
Revenue	(1,341)	(915)	(2,279)	(1,830)
Transferred over Time [Member] | Intersegment Eliminations [Member] | Ancillary Services [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Transferred over Time [Member] | Intersegment Eliminations [Member] | Lease Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Revenue	189,989	166,797	352,984	408,389
Transferred at Point in Time [Member] | Operating Segments [Member] | Product [Member] | Refined Products Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	183,211	150,934	338,367	383,708
Transferred at Point in Time [Member] | Operating Segments [Member] | Product [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	5,295	13,282	11,008	19,721
Transferred at Point in Time [Member] | Operating Segments [Member] | Product [Member] | Marine Storage Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,483	2,581	3,609	4,960
Transferred at Point in Time [Member] | Intersegment Eliminations [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0

Revenue from Contract with Cu_5

Revenue from Contract with Customers (Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Billed Contracts Receivable	$ 134,506	$ 102,684
Contract with Customer, Asset, after Allowance for Credit Loss	8,226	8,487
Contract with Customer, Liability	$ 115,692	$ 122,129

Revenue from Contract with Cu_6

Revenue from Contract with Customers (Performance Obligations) (Details) $ in Thousands	Jun. 30, 2019USD ($)
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 3,518,351
Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	2,052,375
Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	1,244,128
Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 221,848

Revenue from Contract with Cu_7

Revenue from Contract with Customers (Performance Obligations in Next 12 Months) (Details) $ in Thousands	Jun. 30, 2019USD ($)
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 3,518,351
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 718,710
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	$ 2,052,375
Refined Products Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	273,714
Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	1,244,128
Crude Oil Pipeline and Terminals Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	330,830
Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	221,848
Marine Storage Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 114,166
Minimum [Member] | Refined Products Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
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]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Minimum [Member] | Marine Storage Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
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]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	19 years
Maximum [Member] | Crude Oil Pipeline and Terminals Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	10 years
Maximum [Member] | Marine Storage Segment [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Segment Reporting Information [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	5 years

Segment Disclosures (Schedule O

Segment Disclosures (Schedule Of Business Segment Reporting Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Revenues	$ 701,699	$ 644,091	$ 1,330,634	$ 1,322,870
Operating expenses	168,929	159,845	314,954	303,141
Cost of product sales	152,876	153,679	321,970	353,271
Other income	5,024	0	(1,917)	0
(Earnings) losses of non-controlled entities	(40,785)	(42,510)	(72,040)	(77,048)
Operating margin	415,655	373,077	767,667	743,506
Depreciation, amortization and impairment	62,530	53,619	124,401	105,498
G&A expense	52,383	53,290	98,378	99,846
Operating profit	300,742	266,168	544,888	538,162
Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	489,896	442,350	912,469	935,815
Operating expenses	115,811	113,342	205,489	207,391
Cost of product sales	146,516	137,543	306,670	327,876
Other income	(738)		(1,352)
(Earnings) losses of non-controlled entities	4,218	97	5,648	(2,221)
Operating margin	224,089	191,368	396,014	402,769
Depreciation, amortization and impairment	34,738	30,508	70,272	59,415
G&A expense	31,020	33,187	58,735	62,074
Operating profit	158,331	127,673	267,007	281,280
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	164,510	155,084	321,317	291,797
Operating expenses	37,217	31,177	81,040	64,768
Cost of product sales	4,710	13,761	11,374	20,811
Other income	6,056		4,483
(Earnings) losses of non-controlled entities	(43,735)	(41,851)	(76,037)	(73,459)
Operating margin	160,262	151,997	300,457	279,677
Depreciation, amortization and impairment	15,743	12,741	31,002	25,503
G&A expense	14,097	13,455	26,712	25,361
Operating profit	130,422	125,801	242,743	228,813
Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenues	48,634	47,572	99,127	97,088
Operating expenses	18,586	17,693	33,483	35,657
Cost of product sales	1,650	2,375	3,926	4,584
Other income	(294)		(5,048)
(Earnings) losses of non-controlled entities	(1,268)	(756)	(1,651)	(1,368)
Operating margin	29,960	28,260	68,417	58,215
Depreciation, amortization and impairment	10,705	8,918	20,348	17,735
G&A expense	7,266	6,648	12,931	12,411
Operating profit	11,989	12,694	35,138	28,069
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(1,341)	(915)	(2,279)	(1,830)
Operating expenses	(2,685)	(2,367)	(5,058)	(4,675)
Cost of product sales	0	0	0	0
Other income	0		0
(Earnings) losses of non-controlled entities	0	0	0	0
Operating margin	1,344	1,452	2,779	2,845
Depreciation, amortization and impairment	1,344	1,452	2,779	2,845
G&A expense	0	0	0	0
Operating profit	0	0	0	0
Service [Member]
Segment Reporting Information [Line Items]
Revenues	506,405	472,248	967,197	904,185
Service [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	306,215	291,064	573,220	551,458
Service [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	155,569	137,953	303,177	264,211
Service [Member] | Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenues	45,962	44,146	93,079	90,346
Service [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(1,341)	(915)	(2,279)	(1,830)
Product [Member]
Segment Reporting Information [Line Items]
Revenues	189,989	166,797	352,984	408,389
Product [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	183,211	150,934	338,367	383,708
Product [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	5,295	13,282	11,008	19,721
Product [Member] | Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,483	2,581	3,609	4,960
Product [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Product and Service, Other [Member]
Segment Reporting Information [Line Items]
Revenues	5,305	5,046	10,453	10,296
Product and Service, Other [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	470	352	882	649
Product and Service, Other [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	3,646	3,849	7,132	7,865
Product and Service, Other [Member] | Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,189	845	2,439	1,782
Product and Service, Other [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0

Investments in Non-Controlled_3

Investments in Non-Controlled Entities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Revenues	$ 701,699	$ 644,091	$ 1,330,634	$ 1,322,870
Operating	168,929	159,845	314,954	303,141
Cost of product sales	152,876	153,679	321,970	353,271
Trade accounts receivable	139,611		139,611		$ 104,164
Other accounts receivable	25,317		25,317		25,007
Long-term receivables	21,304		21,304		20,844
Change in Equity Method Investments [Roll Forward]
Investments at December 31, 2018			1,076,306
Additional investment			112,251
Indemnification settlement			(5,000)
Proportionate share of earnings			72,968
Amortization of excess investment and capitalized interest			(928)
Earnings of non-controlled entities	40,785	42,510	72,040	77,048
Distributions from operations of non-controlled entities			83,069	94,661
Distributions from returns of investments in non-controlled entities			7,500	0
Investments at June 30, 2019	1,165,028		1,165,028
Service [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	506,405	472,248	967,197	904,185
Product [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	189,989	166,797	352,984	408,389
Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Related Party Transaction, Other Revenues from Transactions with Related Party	$ 1,100	1,200	$ 2,600	1,700
BridgeTex [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	30.00%		30.00%
BridgeTex [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Trade accounts receivable					318
Other accounts receivable	$ 31		$ 31		1,549
Other Accounts Payable	530		530
BridgeTex [Member] | Equity Method Investee [Member] | Service [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	$ 10,181	9,697	$ 20,326	19,561
Double Eagle Pipeline Llc [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%		50.00%
Double Eagle Pipeline Llc [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Trade accounts receivable	$ 569		$ 569		546
Double Eagle Pipeline Llc [Member] | Equity Method Investee [Member] | Service [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	$ 1,572	1,343	$ 3,231	2,887
HoustonLink Pipeline Company LLC [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%		50.00%
MVP Terminalling, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%		50.00%
MVP Terminalling, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Other accounts receivable	$ 387		$ 387		397
Powder Springs Logistics, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%		50.00%
Powder Springs Logistics, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Cost of product sales	$ 0	410	$ 0	410
Trade accounts receivable	144		144
Other accounts receivable	5		5
Long-term receivables	3,824		3,824		2,221
Powder Springs Logistics, LLC [Member] | Equity Method Investee [Member] | Product [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	$ 0	2,180	$ 0	4,899
Saddlehorn Pipeline Company [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	40.00%		40.00%
Saddlehorn Pipeline Company [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Trade accounts receivable	$ 184		$ 184
Other accounts receivable	123		123		183
Saddlehorn Pipeline Company [Member] | Equity Method Investee [Member] | Service [Member]
Schedule of Equity Method Investments [Line Items]
Revenues	$ 551	538	$ 1,103	1,076
Seabrook Logistics, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%		50.00%
Seabrook Logistics, LLC [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Operating	$ 6,241	$ 0	$ 13,150	$ 0
Other accounts receivable	252		252
Other Accounts Payable	$ 1,195		$ 1,195		$ 1,140
Texas Frontera Llc [Member]
Schedule of Equity Method Investments [Line Items]
Interest in equity method investment	50.00%		50.00%

Inventory (Details)

Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Refined products	$ 72,219	$ 92,751
Liquefied petroleum gases	46,294	46,612
Transmix	32,891	28,497
Crude oil	15,051	11,220
Additives	6,452	6,655
Total inventory	$ 172,907	$ 185,735

Employee Benefit Plans (Narrati

Employee Benefit Plans (Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)pension_plan	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)pension_plan	Jun. 30, 2018USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Contribution Plan, Cost	$ 2.4	$ 2.3	$ 6.5	$ 6.1
Number Of Company Sponsored Union Pension Plans | pension_plan	2		2
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	$ 31.6		$ 31.6
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	$ 0.6		$ 0.6

Schedule Of Consolidated Net Pe

Schedule Of Consolidated Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Pension Plan [Member]
Components of net periodic benefit costs:
Service cost	$ 6,358	$ 6,269	$ 12,885	$ 21,969
Interest cost	3,110	2,795	6,110	9,238
Expected return on plan assets	(2,317)	(3,024)	(4,691)	(6,002)
Amortization of prior service credit	(45)	(46)	(90)	(91)
Amortization of actuarial loss	1,508	1,569	2,785	6,523
Settlement cost	2,060	0	2,060	0
Net periodic benefit cost	10,674	7,563	19,059	31,637
Other Postretirement Benefits Plan [Member]
Components of net periodic benefit costs:
Service cost	43	51	97	116
Interest cost	135	102	254	208
Expected return on plan assets	0	0	0	0
Amortization of prior service credit	0	0	0	0
Amortization of actuarial loss	117	134	188	294
Settlement cost	0	0	0	0
Net periodic benefit cost	$ 295	$ 287	$ 539	$ 618

Employee Benefit Plans Schedule

Employee Benefit Plans Schedule of Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Changes in AOCL [Roll Forward]
Accumulated other comprehensive loss (Beginning Bal)			$ (120,491)
Net actuarial loss	$ (10,913)	$ 653	(10,913)	$ (5,291)
Amortization of prior service credit	(45)	(46)	(90)	(91)
Amortization of actuarial loss	1,625	1,703	2,973	6,817
Settlement cost	2,060	0	2,060	0
Accumulated other comprehensive loss (Ending Bal)	(136,268)		(136,268)
Pension Plan [Member]
Changes in AOCL [Roll Forward]
Accumulated other comprehensive loss (Beginning Bal)	(87,370)	(98,261)	(88,602)	(97,226)
Net actuarial loss	(10,029)	386	(10,029)	(5,558)
Amortization of prior service credit	(45)	(46)	(90)	(91)
Amortization of actuarial loss	1,508	1,569	2,785	6,523
Settlement cost	2,060	0	2,060	0
Accumulated other comprehensive loss (Ending Bal)	(93,876)	(96,352)	(93,876)	(96,352)
Other Postretirement Benefits Plan [Member]
Changes in AOCL [Roll Forward]
Accumulated other comprehensive loss (Beginning Bal)	(5,338)	(6,437)	(5,409)	(6,597)
Net actuarial loss	(884)	267	(884)	267
Amortization of prior service credit	0	0	0	0
Amortization of actuarial loss	117	134	188	294
Settlement cost	0	0	0	0
Accumulated other comprehensive loss (Ending Bal)	$ (6,105)	$ (6,036)	$ (6,105)	$ (6,036)

Leases (Narrative) (Details)

Leases (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Leases [Abstract]
Operating Leases, Rent Expense, Net		$ 9,500		$ 18,500
2022	$ 23,544		$ 23,544
Operating Lease, Variable Lease Income	14,200		27,900
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	8,024,845		8,024,845		$ 7,628,592
Other Energy Equipment [Member] | Property Subject to Operating Lease [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	226,500		226,500
Containers [Member] | Property Subject to Operating Lease [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	73,600		73,600
Pipelines [Member] | Property Subject to Operating Lease [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	53,500		53,500
Property, Plant and Equipment, Other Types [Member] | Property Subject to Operating Lease [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 26,700		$ 26,700

Lessee, Future Minimum Payments

Lessee, Future Minimum Payments (Details) $ in Thousands	Jun. 30, 2019USD ($)
Related Party Transaction [Line Items]
2019	$ 18,175
2020	28,939
2021	27,848
2022	25,360
2023	24,837
Thereafter	71,149
Total future minimum rental payments	196,308
Present value discount	27,105
Total operating lease liability	169,203
Third Party Leases
Related Party Transaction [Line Items]
2019	12,961
2020	18,510
2021	18,875
2022	18,748
2023	18,225
Thereafter	33,676
Total future minimum rental payments	120,995
Present value discount	14,105
Total operating lease liability	106,890
Related Party Leases | Equity Method Investee [Member] | Seabrook Logistics, LLC [Member]
Related Party Transaction [Line Items]
2019	5,214
2020	10,429
2021	8,973
2022	6,612
2023	6,612
Thereafter	37,473
Total future minimum rental payments	75,313
Present value discount	13,000
Total operating lease liability	$ 62,313

Leases Operating Lease, Other D

Leases Operating Lease, Other Disclosure (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Fixed lease cost	$ 7,350	$ 14,926
Short-term lease cost	353	810
Variable lease cost	661	1,032
Total lease cost	8,364	16,768
Current lease liability	22,477	22,477	$ 0
Long-term lease liability	146,726	146,726	0
Right-of-use asset	$ 167,456	167,456	$ 0
Operating cash flows from operating leases		$ 12,026
Weighted average remaining lease term (years)	8 years	8 years
Weighted-average discount rate	4.10%	4.10%
Third Party Leases
Related Party Transaction [Line Items]
Fixed lease cost	$ 4,762	$ 9,583
Short-term lease cost	353	810
Variable lease cost	661	1,032
Total lease cost	5,776	11,425
Current lease liability	14,480	14,480
Long-term lease liability	92,411	92,411
Right-of-use asset	$ 105,143	105,143
Operating cash flows from operating leases		$ 6,663
Weighted average remaining lease term (years)	7 years	7 years
Weighted-average discount rate	4.00%	4.00%
Seabrook Logistics, LLC [Member] | Equity Method Investee [Member] | Related Party Leases
Related Party Transaction [Line Items]
Fixed lease cost	$ 2,588	$ 5,343
Short-term lease cost	0	0
Variable lease cost	0	0
Total lease cost	2,588	5,343
Current lease liability	7,997	7,997
Long-term lease liability	54,315	54,315
Right-of-use asset	$ 62,313	62,313
Operating cash flows from operating leases		$ 5,363
Weighted average remaining lease term (years)	9 years	9 years
Weighted-average discount rate	4.20%	4.20%

Leases Lessor, Future Minimum R

Leases Lessor, Future Minimum Rentals (Details) $ in Thousands	Jun. 30, 2019USD ($)
Leases [Abstract]
2019	$ 19,744
2020	33,584
2021	33,253
2022	23,544
2023	7,652
Thereafter	15,740
Total	$ 133,517

Leases Direct Financing Lease (

Leases Direct Financing Lease (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Total minimum lease payments receivable	$ 16,594	$ 17,468
Less: Unearned income	3,112	3,422
Recorded net investment in sales-type lease	13,482	14,046
Other accounts receivable	1,164	1,138
Long-term receivables	12,318	12,908
Total	13,482	$ 14,046
2019	900
2020	1,700
2021	1,700
2022	1,700
2023	1,700
Thereafter	$ 8,700

Debt (Consolidated Debt) (Detai

Debt (Consolidated Debt) (Details) - USD ($)	Jun. 30, 2019	Mar. 31, 2019	Feb. 11, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 4,447,000,000			$ 4,300,000,000
Unamortized debt issuance costs	(31,195,000)			(27,070,000)
Net unamortized premium (discount)	(8,012,000)			(2,927,000)
Net unamortized amount of gains from historical fair value hedges	0			866,000
Long-term Debt	4,407,793,000			4,270,869,000
Current portion of long-term debt, net	0			59,489,000
Long-term debt, net	4,407,793,000			4,211,380,000
6.55% Notes due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 0		$ 550,000,000	550,000,000
Debt Instrument, Interest Rate, Stated Percentage	6.55%		6.55%
4.25% Notes Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 550,000,000			550,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.25%
3.20% Notes Due 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 250,000,000			250,000,000
Debt Instrument, Interest Rate, Stated Percentage	3.20%
5.00% Notes Due 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 650,000,000			650,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.00%
6.40% Notes Due 2037 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 250,000,000			250,000,000
Debt Instrument, Interest Rate, Stated Percentage	6.40%
4.20% Notes Due 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 250,000,000			250,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.20%
5.15% Notes Due 2043 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 550,000,000			550,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.15%
4.20% Notes Due 2045 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 250,000,000			250,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.20%
4.25% Notes Due 2046 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000,000			500,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.25%
4.20% Notes Due 2047 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000,000			500,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.20%
4.85% Notes Due 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000,000	$ 500,000,000		0
Debt Instrument, Interest Rate, Stated Percentage	4.85%	4.85%
Commercial Paper [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 197,000,000			$ 0

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Mar. 31, 2019	Feb. 11, 2019
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 4,447,000,000		$ 4,300,000,000
Borrowings under long-term notes	496,855,000	$ 0
Payment for Debt Extinguishment or Debt Prepayment Cost	8,270,000	$ 0
Long term debt	4,407,793,000		4,270,869,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long term debt			0
Commercial Paper [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	197,000,000		$ 0
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,000,000,000
Long-term Debt, Weighted Average Interest Rate, over Time	2.70%		2.30%
Commercial Paper [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Term	397 days
4.85% Notes Due 2049 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 500,000,000		$ 0	$ 500,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.85%			4.85%
Debt Instrument, Notes At Price	99.371%
Borrowings under long-term notes	$ 491,500,000
Payment for Debt Extinguishment or Debt Prepayment Cost	8,300,000
6.55% Notes due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 0		550,000,000		$ 550,000,000
Debt Instrument, Interest Rate, Stated Percentage	6.55%				6.55%
Notes Payable to Banks [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 500,000,000
Unused commitment fee	0.10%
Line of Credit Facility, Expiration Period	364 days
Short-term Debt	$ 0
Notes Payable to Banks [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Unused commitment fee	0.075%
Notes Payable to Banks [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Unused commitment fee	0.125%
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
Obligation for letters of credit	$ 3,500,000		$ 6,800,000
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] | Notes Payable to Banks [Member] | Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
London Interbank Offered Rate (LIBOR) [Member] | Notes Payable to Banks [Member] | Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.25%
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%

Derivative Financial Instrume_3

Derivative Financial Instruments (Narrative) (Details)	3 Months Ended	6 Months Ended
	Mar. 31, 2019USD ($)	Jun. 30, 2019USD ($)bbl	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Derivative [Line Items]
Debt Instrument, Face Amount		$ 4,447,000,000		$ 4,300,000,000
Net receipt on financial derivatives		8,028,000	$ 0
Good Faith and Margin Deposits with Broker-Dealers		27,533,000		0
Energy commodity derivatives deposits		0		37,328,000
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months		$ (2,400,000)
Energy Related Derivative [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl		30,000
Derivative Liability		$ 12,600,000
Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, Notional Amount		100,000,000
Cash Flow Hedging [Member] | Interest Rate Contract [Member] | Other Current Liabilities [Member]
Derivative [Line Items]
Derivative Liability		(11,100,000)
4.85% Notes Due 2049 [Member]
Derivative [Line Items]
Debt Instrument, Face Amount	$ 500,000,000	$ 500,000,000		$ 0
Debt Instrument, Interest Rate, Stated Percentage	4.85%	4.85%
4.85% Notes Due 2049 [Member] | Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 150,000,000
Net receipt on financial derivatives	$ (8,000,000)

Derivative Financial Instrume_4

Derivative Financial Instruments (Schedule Of NYMEX Contracts And Butane Price Swap Purchase Agreements) (Details) bbl in Millions	Jun. 30, 2019bbl
Economic Hedges [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	4.3
Economic Hedges Futures [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	1.3

Derivative Financial Instrume_5

Derivative Financial Instruments (Schedule of Derivative Offset Amounts) (Details) - USD ($) $ in Thousands		Jun. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Energy commodity derivatives deposits		$ 27,533	$ 0
Exchange Traded [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset		2,558	62,166
Derivative Liability, Fair Value, Gross Liability		(11,655)	(7,155)
Derivative Asset, Fair Value, Amount Not Offset Against Collateral			55,011
Derivative Liability, Fair Value, Amount Not Offset Against Collateral		9,097
Derivative, Collateral, Right to Reclaim Cash			(37,328)
Energy commodity derivatives deposits		27,533
Amount After Offset	[1]	$ 18,436	$ 17,683
[1]	Amount represents the maximum loss we would incur if all of our counterparties failed to perform on their derivative contracts.

Derivative Financial Instrume_6

Derivative Financial Instruments (Derivative Gains Included In Accumulated Other Comprehensive Loss (AOCL) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Gains Included in AOCI [Roll Forward]
Beginning balance	$ (30,229)	$ (27,601)	$ (26,480)	$ (33,755)
Net gain (loss) on cash flow hedges	(6,659)	1,697	(11,035)	7,111
Reclassification of net loss (gain) on cash flow hedges to income	601	739	1,228	1,479
Ending balance	$ (36,287)	$ (25,165)	$ (36,287)	$ (25,165)

Derivative Financial Instrume_7

Derivative Financial Instruments (Derivatives And Hedging-Cash Flow Hedges) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on cash flow hedges	$ (6,659)	$ 1,697	$ (11,035)	$ 7,111
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	(6,659)	1,697	(11,035)	7,111
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	$ (601)	$ (739)	$ (1,228)	$ (1,479)

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		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (17,254)	$ (30,074)	$ (67,964)	$ (41,393)
Commodity Contract [Member] | Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(4,619)	(38,411)	(59,130)	(45,786)
Commodity Contract [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(6,148)	8,337	(3,875)	4,393
Energy Related Derivative [Member] | Other Operating Income (Expense) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (6,487)	$ 0	$ (4,959)	$ 0

Derivative Financial Instrume_9

Derivative Financial Instruments (Derivatives and Hedging - Designated) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset		$ 774
Derivative Liability, Fair Value, Gross Liability		8,438
Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset		462
Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability		0
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 0	312
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	11,133	8,438
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	2,558
Derivative Liability, Fair Value, Gross Liability	24,254
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	2,558	61,704
Not Designated as Hedging Instrument [Member] | Commodity Contract [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	11,655	$ 7,155
Not Designated as Hedging Instrument [Member] | Energy Related Derivative [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0
Not Designated as Hedging Instrument [Member] | Energy Related Derivative [Member] | Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	4,979
Not Designated as Hedging Instrument [Member] | Energy Related Derivative [Member] | Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Fair Value, Gross Asset	0
Not Designated as Hedging Instrument [Member] | Energy Related Derivative [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 7,620

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)	Oct. 04, 2017facility
Loss Contingencies [Line Items]
Liabilities recognized for estimated environmental costs	$ 17.1		$ 17.1		$ 20.5
Environmental expenses	1.4	$ 2.8	3.4	$ 5.3
Receivables from insurance carriers related to environmental matters	2.8		2.8		4.1
Accounts Receivable [Member]
Loss Contingencies [Line Items]
Receivables from insurance carriers related to environmental matters	1		1		2.4
Other Noncurrent Assets [Member]
Loss Contingencies [Line Items]
Receivables from insurance carriers related to environmental matters	$ 1.8		$ 1.8		$ 1.7
Powder Springs Logistics, LLC [Member]
Loss Contingencies [Line Items]
Interest in equity method investment	50.00%		50.00%
Powder Springs Logistics, LLC [Member] | Guarantee of Indebtedness of Others [Member] | Equity Method Investee [Member]
Loss Contingencies [Line Items]
Interest in equity method investment	50.00%		50.00%
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 25		$ 25
Guarantees, Fair Value Disclosure	$ 0.4		$ 0.4
Pending Litigation [Member] | Unfavorable Regulatory Action [Member]
Loss Contingencies [Line Items]
Loss Contingency, Alleged Patent Infringement, Number Of Facilities | facility						9

Long-Term Incentive Plan (Narra

Long-Term Incentive Plan (Narrative) (Details) - shares	Feb. 01, 2019	Jun. 30, 2019
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)		1,600,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	347,473
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		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Allocation of LTIP expense on consolidated statements of income	$ 10,890	$ 10,047	$ 15,804	$ 16,679
G&A Expense [Member]
Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Allocation of LTIP expense on consolidated statements of income	10,802	9,968	15,673	16,545
Operating Expenses [Member]
Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Allocation of LTIP expense on consolidated statements of income	88	79	131	134
Performance Based Awards [Member]
Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Allocation of LTIP expense on consolidated statements of income	9,317	9,165	12,961	15,089
Time-Based Awards [Member]
Share-based Compensation Arrangements by Share-based Payment Award [Line Items]
Allocation of LTIP expense on consolidated statements of income	$ 1,573	$ 882	$ 2,843	$ 1,590

Partners' Capital and Distrib_3

Partners' Capital and Distributions (Narrative) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)shares
Partners' Capital [Abstract]
Amount Authorized Under Equity Distribution Agreement | $	$ 750
Equity Distribution Agreement, Units Issued (in shares) | shares	0

Partners' Capital and Distrib_4

Partners' Capital and Distributions (Schedule of Capital Units) (Details)	6 Months Ended
	Jun. 30, 2019directorshares
Increase (Decrease) in Partners' Capital [Roll Forward]
Limited partner units outstanding on January 1, 2018 (in shares)	228,195,160
Limited partner units outstanding on March 31, 2018 (in shares)	228,403,428
Management [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
During 2019–Other (in shares)	199,792
Director [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
During 2019–Other (in shares)	8,476
Partners' Capital Account, Unit-based Payment Arrangement, Number Of Independent Directors | director	4

Partners' Capital and Distrib_5

Partners' Capital and Distributions (Schedule Of Distributions) (Details) - USD ($) $ / shares in Units, $ in Thousands	Aug. 14, 2019	May 15, 2019	Feb. 14, 2019	Nov. 14, 2018	Aug. 14, 2018	May 15, 2018	Feb. 14, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2019	Dec. 31, 2018
Distribution Made to Limited Partner [Line Items]
Cash distribution per unit (in dollars per share)		$ 1.0050	$ 0.9975	$ 0.9775	$ 0.9575	$ 0.9375	$ 0.9200	$ 2.0025	$ 1.8575		$ 3.7925
Total Cash Distribution to Limited Partners		$ 229,545	$ 227,832	$ 223,061	$ 218,497	$ 213,933	$ 209,940	$ 457,377	$ 423,873		$ 865,431
Scenario, Forecast
Distribution Made to Limited Partner [Line Items]
Cash distribution per unit (in dollars per share)	$ 1.0125									$ 3.0150
Total Cash Distribution to Limited Partners	$ 231,258									$ 688,635

Fair Value Fair Value (Narrativ

Fair Value Fair Value (Narrative) (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019USD ($)bbl	Mar. 31, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)bbl	Jun. 30, 2018USD ($)
Derivative [Line Items]
Gain (Loss) on Disposition of Other Assets	$ 4,646		$ 0	$ 26,434	$ 0
Energy Related Derivative [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount | bbl	30,000			30,000
BridgeTex [Member]
Derivative [Line Items]
Gain (Loss) on Disposition of Other Assets		$ 11,000
BridgeTex [Member] | Indemnification Agreement [Member]
Derivative [Line Items]
Guarantees, Fair Value Disclosure		$ 5,000

Fair Value (Schedule Of Carryin

Fair Value (Schedule Of Carrying Amounts And Fair Values Of Financial Assets/Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Energy Related Derivative [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	$ (12,600)
Fair Value, Inputs, Level 1 [Member] | Commodity Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	(9,097)
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt	(4,740,628)	$ (4,224,373)
Fair Value, Inputs, Level 2 [Member] | Interest Rate Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	(11,133)	(8,126)
Fair Value, Inputs, Level 2 [Member] | Energy Related Derivative [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	(12,599)
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	21,304	20,844
Guarantees, Fair Value Disclosure	(408)	(16,409)
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	21,304	20,844
Guarantees, Fair Value Disclosure	(408)	(16,409)
Debt	(4,407,793)	(4,270,869)
Reported Value Measurement [Member] | Commodity Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset		55,011
Derivative Liability	(9,097)
Reported Value Measurement [Member] | Interest Rate Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	(11,133)	(8,126)
Reported Value Measurement [Member] | Energy Related Derivative [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	(12,599)
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term receivables	21,304	20,844
Guarantees, Fair Value Disclosure	(408)	(16,409)
Debt	(4,740,628)	(4,224,373)
Estimate of Fair Value Measurement [Member] | Commodity Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset		55,011
Derivative Liability	(9,097)
Estimate of Fair Value Measurement [Member] | Interest Rate Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	(11,133)	(8,126)
Estimate of Fair Value Measurement [Member] | Energy Related Derivative [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liability	$ (12,599)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commodity Contract [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset		$ 55,011

Related Party Transactions (Det

Related Party Transactions (Details) - Director [Member] - Methvin Company [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Related Party Transaction [Line Items]
Related Party Transaction, Other Revenues from Transactions with Related Party	$ 7	$ 4.6	$ 14.3	$ 8.4
Accounts Receivable, Related Parties, Current	2		$ 2		$ 1.9
Related Party Transaction, Amounts of Transaction	$ 0.2

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands	Aug. 14, 2019	May 15, 2019	Feb. 14, 2019	Nov. 14, 2018	Aug. 14, 2018	May 15, 2018	Feb. 14, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Cash distribution per unit (in dollars per share)		$ 1.0050	$ 0.9975	$ 0.9775	$ 0.9575	$ 0.9375	$ 0.9200	$ 2.0025	$ 1.8575		$ 3.7925
Total cash distributions		$ 229,545	$ 227,832	$ 223,061	$ 218,497	$ 213,933	$ 209,940	$ 457,377	$ 423,873		$ 865,431
Scenario, Forecast
Subsequent Event [Line Items]
Cash distribution per unit (in dollars per share)	$ 1.0125									$ 3.0150
Total cash distributions	$ 231,258									$ 688,635

Uncategorized Items - mmp-20196

Label	Element	Value
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 5,975,000
Limited Partner [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 5,975,000