Altera Infrastructure (ALIN-PA) 20-F 28 Feb 20 2019 FY Annual report (foreign) Financial data

Document and Entity Information

Document and Entity Information	12 Months Ended
	Dec. 31, 2019shares
Document And Entity Information [Abstract]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Voluntary Filers	No
Entity Emerging Growth Company	false
Entity Registrant Name	Teekay Offshore Partners L.P.
Entity Central Index Key	0001382298
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding	411,148,991

Consolidated Statements of Loss

Consolidated Statements of Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenues (notes 5 and 11)	$ 1,268,000	$ 1,416,424	$ 1,110,284
Voyage expenses	(129,910)	(151,808)	(99,444)
Vessel operating expenses (note 11)	(426,951)	(437,671)	(353,564)
Time-charter hire expenses	(44,427)	(52,616)	(80,315)
Depreciation and amortization (note 1)	(349,379)	(372,290)	(309,975)
General and administrative (notes 11 and 17)	(76,245)	(65,427)	(62,249)
(Write-down) and gain on sale of vessels (notes 3 and 18)	(332,125)	(223,355)	(318,078)
Restructuring charge (note 10)	0	1,520	2,664
Operating (loss) income	(91,037)	111,737	(116,005)
Interest expense (notes 8, 11 and 12)	(205,709)	(199,395)	(154,890)
Interest income	5,111	3,598	2,707
Realized and unrealized (loss) gain on derivative instruments (note 12)	(85,195)	12,808	(42,853)
Equity income (note 19)	32,794	39,458	14,442
Foreign currency exchange gain (loss) (note 12)	2,193	(9,413)	(14,006)
Losses on debt repurchases (notes 8 and 11k)	0	(55,479)	(3,102)
Other (expense) income - net	(1,225)	(4,602)	14,167
Loss before income tax (expense) recovery	(343,068)	(101,288)	(299,540)
Income tax (expense) recovery (note 13)	(7,827)	(22,657)	98
Net loss	(350,895)	(123,945)	(299,442)
Non-controlling interests in net loss	(1,384)	(7,161)	3,764
Preferred unitholders' interest in net loss (note 16)	32,150	31,485	42,065
General Partner’s interest in net loss	(2,891)	(1,128)	(5,770)
Limited partners' interest in net loss	(378,770)	(147,141)	(339,501)
Limited partners' interest in net loss for basic net loss per common unit (note 16)	$ (378,770)	$ (147,141)	$ (320,749)
Limited partners' interest in net (loss) income per common unit:
- basic (USD per unit)	$ (0.92)	$ (0.36)	$ (1.45)
- diluted (USD per unit)	$ (0.92)	$ (0.36)	$ (1.46)
Weighted-average number of common units outstanding:
- basic (in units)	410,727,035	410,261,239	220,755,937
- diluted (in units)	410,727,035	410,261,239	229,940,120

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (350,895)	$ (123,945)	$ (299,442)
Other comprehensive (loss) income:
Unrealized gain (loss) on qualifying cash flow hedging instruments (note 12)	0	6,017	(905)
Pension adjustments, net of taxes	(1,662)	1,096	0
Realized (gain) loss on qualifying cash flow hedging instruments (note 12)	(689)	(102)	1,186
Realized (gain) loss on qualifying cash flow hedging instruments	(600)	873	0
Other comprehensive (loss) income	(2,951)	7,884	281
Comprehensive loss	(353,846)	(116,061)	(299,161)
Non-controlling interests in comprehensive loss	(1,384)	(7,161)	3,764
Preferred unitholders' interest in comprehensive loss	32,150	31,485	42,065
General and limited partners' interest in comprehensive loss	$ (384,612)	$ (140,385)	$ (344,990)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current
Cash and cash equivalents	$ 199,388	$ 225,040
Restricted cash (notes 3, 12 and 15)	17,798	8,540
Accounts receivable, including non-trade of $34,468 (December 31, 2018 - $8,183)	204,020	141,903
Vessels held for sale (notes 3 and 18)	15,374	12,528
Prepaid expenses	29,887	32,199
Due from related parties (note 11c)	0	58,885
Other current assets (notes 3b, 5 and 12)	7,467	11,879
Total current assets	473,934	490,974
Restricted cash - long-term (note 15)	89,070	0
Vessels and equipment
At cost, less accumulated depreciation of $1,666,582 (December 31, 2018 - $1,634,394)	3,511,758	4,196,909
Advances on newbuilding contracts (note 14c)	257,017	73,713
Investments in equity-accounted joint ventures (note 19)	234,627	212,202
Deferred tax asset (note 13)	7,000	9,168
Due from related parties (note 11c)	0	949
Other assets (notes 2, 3b, 5, 9 and 12)	220,716	198,992
Goodwill (note 6a)	129,145	129,145
Total assets	4,923,267	5,312,052
Current
Accounts payable	56,699	16,423
Accrued liabilities (notes 7, 10, 12, and 17)	140,976	129,896
Deferred revenues (note 5)	53,728	55,750
Due to related parties (notes 11c and 11j)	20,000	183,795
Current portion of derivative instruments (note 12)	18,956	23,290
Current portion of long-term debt (note 8)	353,238	554,336
Other current liabilities (notes 2, 3 and 9)	14,793	15,062
Total current liabilities	658,390	978,552
Long-term debt (note 8)	2,825,712	2,543,406
Derivatives instruments (note 12)	143,222	94,354
Other long-term liabilities (notes 2, 3, 5, 9, 13 and 14)	223,877	236,616
Total liabilities	3,851,201	3,852,928
Commitments and contingencies (notes 8, 9, 12 and 14)
Equity
Limited partners - common units (411.1 million and 410.3 million units issued and outstanding at December 31, 2019 and December 31, 2018, respectively) (notes 16 and 17)	505,394	883,090
Limited partners - preferred units (15.8 million and 15.8 million units issued and outstanding at December 31, 2019 and December 31, 2018, respectively) (note 16)	384,274	384,274
General Partner	12,164	15,055
Warrants (note 16)	132,225	132,225
Accumulated other comprehensive income	4,410	7,361
Non-controlling interests	33,599	37,119
Total equity	1,072,066	1,459,124
Total liabilities and total equity	$ 4,923,267	$ 5,312,052

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands, shares in Millions	Dec. 31, 2019	Dec. 31, 2018
Accounts receivable, non-trade	$ 34,468	$ 8,183
Accumulated depreciation	$ 1,666,582	$ 1,634,394
Common Units
Limited partners, units issued	411.1	410.3
Limited partners, units outstanding	411.1	410.3
Preferred Units
Limited partners, units issued	15.8	15.8
Limited partners, units outstanding	15.8	15.8

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
OPERATING ACTIVITIES
Net loss	$ (350,895)	$ (123,945)	$ (299,442)
Adjustments to reconcile net loss to net operating cash flow:
Unrealized loss (gain) on derivative instruments (note 12)	50,956	(53,419)	(59,702)
Equity income, net of dividends received of $17,655 (2018 - $6,200, 2017 - $11,600) (note 19)	(15,139)	(33,258)	(2,842)
Depreciation and amortization	349,379	372,290	309,975
Write-down and (gain) on sale and of vessels (note 18)	332,125	223,355	318,078
Deferred income tax expense (recovery) (note 13)	3,161	18,606	(1,870)
Amortization of in-process revenue contract (note 6b)	(15,062)	(35,219)	(12,745)
Expenditures for dry docking	(31,142)	16,871	37,511
Other	12,416	(83,227)	33,506
Change in non-cash working capital items related to operating activities (note 15b)	(15,890)	(21,411)	(17,269)
Net operating cash flow	319,909	280,643	305,200
FINANCING ACTIVITIES
Proceeds from long-term debt (note 8)	492,517	734,698	1,205,477
Scheduled repayments of long-term debt and settlement of related swaps (notes 8 and 12)	(410,429)	(567,298)	(652,898)
Prepayments of long-term debt and settlement of related swaps (notes 8 and 12)	0	(457,426)	(702,115)
Financing issuance costs	(23,755)	(14,128)	(17,268)
Proceeds from financing related to sales and leaseback of vessels	23,800	0	0
Equity contribution from joint venture partners	0	0	6,000
Proceeds from issuance of common units and warrants (note 16)	0	0	640,595
Proceeds from issuance of preferred units (note 16)	0	120,000	0
Repurchase of preferred units (note 16)	0	0	(250,022)
Expenses relating to equity offerings	0	(3,997)	(12,155)
Proceeds from credit facility due to related parties (note 11j)	95,000	125,000	0
Prepayments of credit facility due to related parties	(200,000)	0	0
Cash distributions paid by the Partnership	(32,150)	(46,675)	(60,593)
Cash distributions paid by subsidiaries to non-controlling interests	(3,636)	(12,048)	(9,891)
Cash contribution paid from non-controlling interest to subsidiaries	1,500	1,500	0
Other	(865)	(964)	(4,183)
Net financing cash flow	(58,018)	(121,338)	142,947
INVESTING ACTIVITIES
Net payments for vessels and equipment, including advances on newbuilding contracts and conversion costs	(214,670)	(233,736)	(533,260)
Proceeds from sale of vessels and equipment (note 18)	33,341	30,049	13,100
Investments in equity accounted joint ventures	(7,886)	(3,000)	(25,824)
Direct financing lease payments received	0	5,414	5,844
Acquisition of companies from Teekay Corporation (net of cash acquired of $26.6 million) (note 11l)	0	25,254	0
Net investing cash flow	(189,215)	(176,019)	(540,140)
Increase (decrease) in cash, cash equivalents and restricted cash	72,676	(16,714)	(91,993)
Cash, cash equivalents and restricted cash, beginning of the year	233,580	250,294	342,287
Cash, cash equivalents and restricted cash, end of the year	$ 306,256	$ 233,580	$ 250,294

Consolidated Statements of Ca_2

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Cash Flows [Abstract]
Dividends received	$ 17,655	$ 6,200	$ 11,600
Teekay Knarr AS and Knarr L.L.C
Net cash acquired on business acquisition	$ 26,600

Consolidated Statements of Chan

Consolidated Statements of Changes in Total Equity - USD ($) $ in Thousands	Total	Convertible Preferred Units	Series C-1 Preferred Units	Series D Preferred Units	Series A Preferred Units	Series B Preferred Units	Series E Preferred Units	Limited Partner	Limited PartnerSeries C-1 Preferred Units	General Partner	Common UnitsLimited Partner	Common Units and Additional Paid-in CapitalLimited Partner	Preferred UnitsPreferred Partner	Preferred UnitsPreferred PartnerSeries A Preferred Units	Preferred UnitsPreferred PartnerSeries B Preferred Units	Warrants	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interests	Redeemable Non-controlling Interest
Beginning balance at Dec. 31, 2016	$ 1,138,596	$ 271,237								$ 20,658		$ 784,056	$ 266,925			$ 13,797	$ (804)	$ 53,964	$ 962
Beginning balance (in units) at Dec. 31, 2016		12,517,000									147,514,000		11,000,000
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	(320,060)	$ 20,565								(5,770)		(339,501)	$ 21,500					3,711	53
Other comprehensive income (loss)	281																281
Common Units ($0.24 per unit)	(28,888)									(31)		(28,857)
Series C-1 Preferred Units - cash distributions			$ (6,384)	$ (3,821)	$ (10,874)	$ (10,626)			$ (12,650)					$ (10,874)	$ (10,626)
Other distributions	(8,847)	0																(8,847)	(1,044)
Payment-in-kind distributions (note 16)	18,988	(14,022)								(699)		19,687
Payment-in-kind distributions (note 16) (in units)											6,391,087
Contributions of capital from joint venture partner	6,000																	6,000
Contribution of capital from Teekay Corporation (notes 11i and 16)	45,315									873		44,442
Proceeds from equity offerings, net of offering costs (note 16)	625,387									588		504,851				119,948
Repurchase of Convertible Preferred Units (note 16)	(19,971)	$ 269,993								(383)		(19,588)
Repurchase of Convertible Preferred Units (note 16)		12,517,000
Proceeds from equity offerings, net of offering costs (note 16)											256,000,000
Proceeds from equity offerings, net of offering costs (note 16)								$ (19,637)	26,994
Equity based compensation and other (note 17)	(1,715)	$ 2,418								(6)		(189)				(1,520)
Equity based compensation and other (note 17) (in units)											140,000
Ending balance at Dec. 31, 2017	1,473,528	$ 0								15,996		1,004,077	$ 266,925			132,225	(523)	54,828	(29)
Ending balance (in units) at Dec. 31, 2017		0									410,045,000		11,000,000
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	(123,945)									(1,128)		(147,141)	$ 31,485					(7,161)
Other comprehensive income (loss)	7,884																7,884
Common Units ($0.24 per unit)	(16,536)									(126)		(16,410)
Series C-1 Preferred Units - cash distributions					(10,874)	(10,626)	$ (8,639)		0
Other distributions	(12,048)											0	0					12,048
Contributions of capital from joint venture partner	1,500																	1,500
Proceeds from equity offerings, net of offering costs (note 16)	116,003												$ 116,003
Proceeds from equity offerings, net of offering costs (note 16)													4,800,000
Proceeds from equity offerings, net of offering costs (note 16)								0	0
Equity based compensation and other (note 17)	1,180									(3)		1,183							29
Equity based compensation and other (note 17) (in units)											270,000
Ending balance at Dec. 31, 2018	1,459,124	$ 0								15,055		883,090	$ 384,274			132,225	7,361	37,119	0
Ending balance (in units) at Dec. 31, 2018		0									410,315,000		15,800,000
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income (loss)	(350,895)									(2,891)		(378,770)	$ 32,150					(1,384)
Other comprehensive income (loss)	(2,951)																(2,951)
Series C-1 Preferred Units - cash distributions					$ (10,874)	$ (10,626)	$ (10,650)		0
Other distributions	(3,636)																	3,636
Contributions of capital from joint venture partner	1,500																	1,500
Proceeds from equity offerings, net of offering costs (note 16)								$ 0	$ 0
Equity based compensation and other (note 17)	1,074									0		1,074							0
Equity based compensation and other (note 17) (in units)											834,000
Ending balance at Dec. 31, 2019	$ 1,072,066	$ 0								$ 12,164		$ 505,394	$ 384,274			$ 132,225	$ 4,410	$ 33,599	$ 0
Ending balance (in units) at Dec. 31, 2019		0									411,149,000		15,800,000

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Total Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Common stock dividends (in dolllars per share)		$ 0.04	$ 0.24
Series A Preferred Units
Preferred stock dividends (in dollars per share)	$ 1.8124	1.8124	1.18124
Series B Preferred Units
Preferred stock dividends (in dollars per share)	2.1252	2.1252	2.1252
Series E Preferred Units
Preferred stock dividends (in dollars per share)	$ 2.2188	$ 1.7997	0.6903
Series C-1 Preferred Units
Preferred stock dividends (in dollars per share)			0.7496
Series D Preferred Units
Preferred stock dividends (in dollars per share)			$ 0.9553

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of presentation The consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (or GAAP ). These financial statements include the accounts of Teekay Offshore Partners L.P., which is a limited partnership organized under the laws of the Republic of the Marshall Islands, and its wholly owned or controlled subsidiaries (collectively, the Partnership ). Unless the context otherwise requires, the terms "we," "us," or "our," as used herein, refer to the Partnership. The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results may differ from those estimates. Foreign currency The consolidated financial statements are stated in U.S. Dollars and the functional currency of the Partnership is the U.S. Dollar. Transactions involving other currencies during the year are converted into U.S. Dollars using the exchange rates in effect at the time of the transactions. At the balance sheet dates, monetary assets and liabilities that are denominated in currencies other than the U.S. Dollar are translated to reflect the year-end exchange rates. Resulting gains or losses are reflected separately in the accompanying consolidated statements of loss . Revenues Each vessel charter may, depending on its terms, contain a lease component, a non-lease component or both. Revenues that are fixed on or prior to the commencement of the contract are recognized by the Partnership on a straight-line basis daily over the term of the contract. Where the term of the contract is based on the duration of a single voyage, the Partnership uses a discharge-to-discharge basis in determining proportionate performance for all tanker spot voyages that contain a lease and a load-to-discharge basis in determining proportionate performance for all tanker spot voyages that do not contain a lease. Consequently, the Partnership does not begin recognizing revenue until a voyage charter has been agreed to by the customer and the Partnership, even if the vessel has discharged its prior cargo and is sailing to the anticipated load location for its next voyage. For towage voyages, proportionate performance is determined based on commencement of the tow to completion of the tow. Reimbursements of vessel operating expenditures incurred to provide the contracted services to the charterer are recognized when the expenses entitling the Partnership to reimbursement are incurred. Revenue or penalties from performance-based metrics, such as production tariffs and other operational performance measures, are recognized as earned or incurred unless such performance-based revenue is based on a multi-period performance-based metric that is allocable to non-lease services provided. In such a case, the Partnership will estimate the amount of variable consideration, to the extent that it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved and recognize such estimate of revenue over the performance period. The consolidated balance sheets reflect, in other current assets, the accrued portion of revenues for those voyages that commence prior to balance sheet date and complete after the balance sheet date and reflect, in deferred revenues or other long-term liabilities, the deferred portion of revenues which will be earned in subsequent periods. Prior to the adoption of the Financial Accounting Standards Board (or FASB ) Accounting Standards Update 2014-09, Revenue from Contracts with Customers (or ASU 2014-09 ) on January 1, 2018: • Voyage revenues from towage and offshore installation vessels were recognized over the period of the tow and the mobilization and demobilization of the towage vessel, instead of the period where the tow is being performed. The cumulative-effect adjustment on January 1, 2018 was insignificant. • Revenue from time-charter contracts with fixed annual increases in the daily hire rate during the firm period of the charter to compensate for expected inflationary cost increases were recognized when due under the contract, instead of on a smoothed basis over the term of the time-charter. For time-charters with a termination fee owing if the contract is not extended past the contract term, the non-lease portion of such termination fee was recognized when the termination fee was incurred, instead of recognized over the contract term. The cumulative-effect adjustment on January 1, 2018 was an increase to equity of $7.7 million . • Costs incurred by the Partnership for its onshore staff and seafarers related to the management of FPSO units owned by Teekay Corporation and other vessels were presented on a net basis, instead of presented as vessel operating expenses and the reimbursement of such expenses presented as revenue. There was no cumulative impact to opening equity as at January 1, 2018. • Operating costs for the Partnership's Volatile Organic Compounds (or VOC ) plants on certain shuttle tankers were presented on a net basis, instead of presented as vessel operating expenses and the reimbursement of such expenses presented as revenue. There was no cumulative impact to opening equity as at January 1, 2018. • The Partnership presented the net allocation for its vessels participating in revenue sharing arrangements as revenues, instead of the revenue from those voyages being presented in voyage revenues and the difference between this amount and the Partnership's net allocation from the revenue sharing arrangement being presented as voyage expenses. There was no cumulative impact to opening equity as at January 1, 2018. Operating expenses Voyage expenses are all expenses unique to a particular voyage, including bunker fuel expenses, port fees, cargo loading and unloading expenses, canal tolls, agency fees and commissions. Vessel operating expenses include crewing, ship management services, repairs and maintenance, insurance, stores, lube oils and communication expenses. Voyage expenses and vessel operating expenses are recognized when incurred except when the Partnership incurs pre-operational costs related to the repositioning of a vessel or offshore unit that relates directly to a specific customer contract, that generates or enhances resources of the Partnership that will be used in satisfying performance obligations in the future, and where such costs are expected to be recovered via the customer contract. In this case, such costs are deferred and amortized over the duration of the customer contract. Prior to the adoption of ASU 2014-09 on January 1, 2018, t he Partnership expensed such costs as incurred unless the costs were directly reimbursable by the contract or if they were related to the mo bilization of offshore assets to an oil field. The cumulative-effect adjustment on January 1, 2018 was an increase to equity of $29.4 million . The Partnership recognizes the expense from vessels time-chartered from other owners in time-charter hire expenses in the accompanying consolidated statements of loss . The Partnership has determined that all of its time-charter-in contracts contain both a lease component (lease of the vessel) and a non-lease component (operation of the vessel). The Partnership has allocated the contract consideration between the lease component and non-lease component on a relative standalone selling price basis. The Partnership has elected to recognize the lease payments of short-term leases in profit or loss on a straight-line basis over the lease term and variable lease payments in the period in which the obligation for those payments is incurred, which is consistent with the recognition of payment for the non-lease component. Short-term leases are leases with an original term of one year or less, excluding those leases with an option to extend the lease for greater than one year or an option to purchase the underlying asset that the lessee is reasonably certain to exercise. Cash and cash equivalents The Partnership classifies all highly-liquid investments with a maturity date of three months or less when purchased as cash and cash equivalents. Accounts receivable and allowance for doubtful accounts Accounts receivable are recorded at the invoiced amount and do not bear interest. The allowance for doubtful accounts is the Partnership’s best estimate of the amount of probable credit losses in existing accounts receivable. The Partnership determines the allowance based on historical write-off experience and customer economic data. The Partnership reviews the allowance for doubtful accounts regularly and past due balances are reviewed for collectability. Account balances are charged against the allowance when the Partnership believes that the receivable will not be recovered. There is no allowance for doubtful accounts recorded as at December 31, 2019 and 2018. Investments in equity-accounted joint ventures The Partnership’s investments in equity-accounted joint ventures are accounted for using the equity method of accounting. Under the equity method of accounting, the initial cost of the investment is adjusted for subsequent additional investments and the Partnership’s proportionate share of earnings or losses and distributions. The Partnership evaluates its investments in joint ventures for impairment when events or circumstances indicate that the carrying value of such investments may have experienced an other-than-temporary decline in value below carrying value. If the estimated fair value is less than the carrying value, the carrying value is written down to its estimated fair value and the resulting impairment is recorded in the Partnership’s consolidated statements of loss . No indicators of impairment existed at December 31, 2019 and 2018 . Vessels and equipment All pre-delivery costs incurred during the construction of newbuildings and conversions, including interest, supervision and technical costs, are capitalized. The acquisition cost and all costs incurred to restore used vessels purchased by the Partnership to the standards required to properly service the Partnership’s customers are capitalized. Vessel capital modifications include the addition of new equipment or can encompass various modifications to the vessel which are aimed at improving and/or increasing the operational efficiency and functionality of the asset. This type of expenditure is amortized over the estimated useful life of the modification. Expenditures covering recurring routine repairs or maintenance are expensed as incurred. Depreciation is calculated on a straight-line basis over a vessel’s estimated useful life to an estimated residual value. F loating production storage and offloading (or FPSO ) units are depreciated using an estimated useful life of 20 to 25 years commencing the date the unit is installed at the oil field and is in a condition that is ready to operate. Some of the Partnership’s FPSO units have oil field specific equipment, which is depreciated over the expected life of the oil field. Shuttle tankers are depreciated over an estimated useful life of 20 years commencing the date the vessel is delivered from the shipyard. Floating storage and off take (or FSO ) units are depreciated over the estimated contract term or the estimated useful life of the specific unit. The unit for maintenance and safety (or UMS ) is depreciated over an estimated useful life of 35 years commencing the date it arrived at the oil field and was in a condition that was ready to operate. Towage and offshore installation vessels are depreciated over an estimated useful life of 25 years commencing the date the vessel is delivered from the shipyard. Depreciation of vessels and equipment for the years ended December 31, 2019 , 2018 and 2017 , totaled $330.2 million , $348.4 million , and $286.1 million , respectively. Depreciation and amortization includes depreciation on all owned vessels. Interest costs capitalized to vessels and equipment for the years ended December 31, 2019 , 2018 and 2017 totaled $13.6 million , $11.1 million and $29.6 million , respectively. Generally, the Partnership dry docks each shuttle tanker and towage and offshore installation vessel every two and a half to five years . UMS, FSO and FPSO units are generally not dry docked. The Partnership capitalizes a portion of the costs incurred during dry docking and amortizes those costs on a straight-line basis from the completion of a dry docking over the estimated useful life of the dry dock. Included in capitalized dry docking are costs incurred as part of the dry docking to meet regulatory requirements, or expenditures that either add economic life to the vessel, increase the vessel’s earning capacity or improve the vessel’s operating efficiency. The Partnership expenses costs related to routine repairs and maintenance performed during dry docking that do not improve operating efficiency or extend the useful lives of the assets. Dry-docking activity for the three years ended December 31, 2019 , 2018 and 2017 is summarized as follows: Year Ended Year Ended Year Ended December 31, December 31, December 31, 2019 2018 2017 $ $ $ Balance at beginning of the year 42,538 42,829 49,238 Cost incurred for dry-docking 13,546 23,602 17,183 Dry-docking amortization (19,146 ) (23,893 ) (22,870 ) Write-down / sale of vessels with capitalized dry-dock costs — — (722 ) Balance at end of the year 36,938 42,538 42,829 Vessels and equipment that are “held and used” are assessed for impairment when events or circumstances indicate the carrying amount of the asset may not be recoverable. If the asset’s net carrying value exceeds the net undiscounted cash flows expected to be generated over its remaining useful life, the carrying amount of the asset is reduced to its estimated fair value. The estimated fair value for the Partnership’s impaired vessels is determined using discounted cash flows or appraised values. In cases where an active second hand sale and purchase market does not exist, the Partnership uses a discounted cash flow approach to estimate the fair value of an impaired vessel. In cases where an active second hand sale and purchase market exists, an appraised value is used to estimate the fair value of an impaired vessel. An appraised value is generally the amount the Partnership would expect to receive if it were to sell the vessel. Such appraisal is normally completed by the Partnership. When an asset impairment occurs, the Partnership adjusts the carrying value of the asset to its new cost base and writes off the asset's accumulated depreciation. Asset retirement obligation The Partnership has an asset retirement obligation (or ARO ) relating to the sub-sea mooring and riser system associated with the Randgrid FSO unit. This obligation involves the costs associated with the restoration of the environment surrounding the facility and removal of all equipment, which are subsequently to be reimbursed by the charterer. This obligation is expected to be settled at the end of the contract under which the FSO unit operates, which as at December 31, 2019, was estimated to be May 2024. The Partnership records the fair value of an ARO as a liability in the period when the obligation arises. The fair value of the ARO is measured using expected future cash outflows discounted at the Partnership’s credit-adjusted risk-free interest rate. When the liability is recorded, and as the ARO will be covered by contractual payments to be received from the charterer, the Partnership records a separate receivable concurrently with the ARO being created. Each period, the liability is increased for the change in its present value. Changes in the amount or timing of the estimated ARO are recorded as an adjustment to the related liability and asset. As at December 31, 2019 , the ARO and associated receivable, which are recorded in Other long-term liabilities and Other non-current assets, respectively, were both $26.4 million (2018 - $24.7 million ). Debt issuance costs Debt issuance costs related to a recognized debt liability, including bank fees, commissions and legal expenses, are capitalized and amortized over the term of the relevant loan facility to interest expense using an effective interest rate method. Debt issuance costs are presented as a reduction from the carrying amount of that debt liability, unless no amounts have been drawn under the debt liability or the debt issuance costs exceed the carrying value of the related debt liability, in which case the debt issuance costs are presented as other non-current assets. Fees paid to amend a non-revolving credit facility can be associated with the extinguishment of the old debt instrument and included in determining the debt extinguishment gain or loss to be recognized. Any unamortized debt issuance costs would be written off. If a debt amendment is considered not to be a substantial amendment, then the fees would be associated with the replacement or modified debt instrument and, along with any existing unamortized debt issuance costs and premium or discount, would be amortized as an adjustment of interest expense over the remaining term of the replacement or modified debt instrument using the effective interest method. Other related costs incurred with third parties directly related to the modification, other than the loan amendment fee, are expensed as incurred. Fees paid to amend revolving credit facilities are deferred and amortized over the term of the modified credit facility. If the borrowing capacity is increased as a result of the amendment, unamortized loan costs of the original facility would be deferred and amortized over the term of the modified credit facility. If the borrowing capacity is decreased as a result of the amendment, a proportionate amount, based on the reduction in borrowing capacity, of the unamortized debt issuance costs of the original facility would be written off and the remaining amount would be deferred and amortized over the term of the modified credit facility. Goodwill Goodwill is not amortized, but reviewed for impairment at the reporting unit level on an annual basis or more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. When goodwill is reviewed for impairment, the Partnership will measure the amount by which a reporting unit’s carrying value exceeds its fair value, with the maximum impairment not to exceed the carrying value of goodwill. Derivative instruments All derivative instruments are initially recorded at fair value as either assets or liabilities in the accompanying consolidated balance sheets and subsequently remeasured to fair value, regardless of the purpose or intent for holding the derivative. The method of recognizing the resulting gain or loss is dependent on whether the derivative contract is designed to hedge a specific risk and also qualifies and is designated for hedge accounting. During the year ended December 31, 2018, certain of the Partnership's interest rate swaps were designated in qualifying hedging relationships and hedge accounting was applied in the consolidated financial statements or within the Partnership's equity-accounted joint ventures (see note 12 ). When a derivative is designated in a cash flow hedge, the Partnership formally documents the relationship between the derivative and the hedged item. This documentation includes the strategy and risk management objective for undertaking the hedge and the method that will be used to assess the effectiveness of the hedge. Any hedge ineffectiveness is recognized immediately in earnings, as are any gains and losses on the derivative that are excluded from the assessment of hedge effectiveness. The Partnership does not apply hedge accounting if it is determined that the hedge was not effective or will no longer be effective, the derivative was sold or exercised, or the hedged item was sold, repaid or is no longer probable of occurring. As at December 31, 2018, the Partnership had de-designated all hedging relationships and during the year ended December 31, 2019, the Partnership did not apply hedge accounting to any of its derivative instruments. For derivative financial instruments designated in qualifying cash flow hedges, changes in the fair value of the effective portion of the derivative financial instruments are initially recorded as a component of accumulated other comprehensive income in equity. In the periods when the hedged items affect earnings, the associated fair value changes on the hedging derivatives are transferred from equity to the corresponding earnings line item in the consolidated statements of loss . If a cash flow hedge is de-desiganted and the originally hedged item is still considered probable of occurring, the gains and losses initially recognized in equity remain there until the hedged item impacts earnings, at which point they are transferred to the corresponding earnings line item in the consolidated statements of loss . If the hedged item is no longer probable of occurring, amounts recognized in equity are immediately transferred to the relevant earnings line item in the consolidated statements of loss . For derivative financial instruments that are not designated as accounting hedges, the changes in the fair value of the derivative financial instruments are recognized in earnings. Gains and losses from the Partnership’s non-designated foreign currency forward contracts and interest rate swaps are recorded in realized and unrealized loss on derivative instruments in the consolidated statements of loss . Gains and losses from the Partnership’s non-designated cross currency swaps are recorded in foreign currency exchange loss in the consolidated statements of loss . Unit-based compensation The Partnership grants restricted unit-based compensation awards as incentive-based compensation to certain employees of the Partnership and Teekay Corporation’s subsidiaries that provide services to the Partnership (see note 17 ). The Partnership measures the cost of such awards using an option pricing model to determine the grant date fair value of the award and recognizes that cost, net of estimated forfeitures, over the requisite service period. The requisite service period consists of the period from the grant date of the award to the earlier of the date of vesting or the date the recipient becomes eligible for retirement. For unit-based compensation awards subject to graded vesting, the Partnership calculates the value of the award as if it was one single award with one expected life and amortizes the calculated expense for the entire award on a straight-line basis over the requisite service period. Certain of these awards are cash settled. For cash settled awards, the fair value of such awards is remeasured at each reporting date, based on the fair market value of the Partnership's common units at that date, with the change in fair value recognized as compensation expense. Unit-based compensation expenses are recorded under general and administrative expenses in the Partnership’s consolidated statements of loss . Income taxes The Partnership is subject to income taxes relating to its subsidiaries in Norway, Australia, Brazil, the United Kingdom, Singapore, Qatar, Canada, Luxembourg and the Netherlands. The Partnership accounts for such taxes using the liability method. Under the liability method, deferred tax assets and liabilities are recognized for the anticipated future tax effects of temporary differences between the financial statement basis and the tax basis of the Partnership’s assets and liabilities using the applicable jurisdictional tax rates. A valuation allowance for deferred tax assets is recorded when it is more likely than not that some or all of the benefit from the deferred tax asset will not be realized. Recognition of uncertain tax positions is dependent upon whether it is more-likely-than-not that a tax position taken or expected to be taken in a tax return will be sustained upon examination, including resolution of any related appeals or litigation processes, based on the technical merits of the position. If a tax position meets the more-likely-than-not recognition threshold, it is measured to determine the amount of benefit to recognize in the consolidated financial statements based on guidance in the interpretation. The Partnership recognizes interest and penalties related to uncertain tax positions in income tax (expense) recovery in the Partnership’s consolidated statements of loss . Employee pension plans On January 1, 2018, the Partnership acquired a 100% ownership interest in seven subsidiaries of Teekay Corporation. These subsidiaries provide ship management, commercial, technical, strategic, business development and administrative services to the Partnership, primarily related to the Partnership's FPSO units, shuttle tankers and FSO units (see note 11l). Employees of these companies are generally eligible to participate in pension plans. The Partnership has defined contribution pension plans covering the majority of its employees. Pension costs associated with the Partnership’s required contributions under its defined contribution pension plans are based on a percentage of employees’ salaries and are charged to earnings in the year incurred. With the exception of certain of the Partnership’s employees in Norway, the Partnership’s employees are generally eligible to participate in defined contribution plans. These plans allow for the employees to contribute a certain percentage of their base salaries into the plans. The Partnership matches all or a portion of the employees’ contributions, depending on how much each employee contributes. During the year ended December 31, 2019, the amount of cost recognized for the Partnership’s defined contribution pension plans was $5.2 million (December 31, 2018 and 2017 - $4.5 million and nil , respectively). The Partnership also has defined benefit pension plans covering 288 active and retired employees in Norway as at December 31, 2019 (December 31, 2018 and 2017 - 443 and nil , respectively) . The Partnership accrues the costs and related obligations associated with its defined benefit pension plans based on actuarial computations using the projected benefits obligation method and management’s best estimates of expected plan investment performance, salary escalation, and other relevant factors. For the purpose of calculating the expected return on plan assets, those assets are valued at fair value. The overfunded or underfunded status of the defined benefit pension plans is recognized as assets or liabilities in the consolidated balance sheets. The Partnership recognizes as a component of other comprehensive (loss) income, the gains or losses that arise during a period but that are not recognized as part of net periodic benefit costs. The pension assets have been guaranteed a minimum rate of return by the provider, thus reducing potential exposure to the Partnership to the extent the provider honors its obligations. The Partnership's funded status relating to its defined benefit pension plans was a surplus of $0.3 million as at December 31, 2019 (December 31, 2018 and 2017 - deficiency of $1.5 million and nil , respectively).

Accounting Pronouncements

Accounting Pronouncements	12 Months Ended
	Dec. 31, 2019
Accounting Changes and Error Corrections [Abstract]
Accounting Pronouncements	Accounting Pronouncements In February 2016, the FASB issued Accounting Standards Update 2016-02, Leases (or ASU 2016-02 ). ASU 2016-02 establishes a right-of-use model that requires a lessee to record a right-of-use asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. For lessees, leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. ASU 2016-02 requires lessors to classify leases as a sales-type, direct financing, or operating lease. A lease is a sales-type lease if any one of five criteria are met, each of which indicate that the lease, in effect, transfers control of the underlying asset to the lessee. If none of those five criteria are met, but two additional criteria are both met, indicating that the lessor has transferred substantially all of the risks and benefits of the underlying asset to the lessee and a third party, the lease is a direct financing lease. All leases that are not sales-type leases or direct financing leases are operating leases. ASU 2016-02 was effective January 1, 2019, with early adoption permitted. In July 2018, FASB issued an additional Accounting Standards Update that made further amendments to accounting for leases, including allowing the use of a transition approach whereby a cumulative effect adjustment is made as of the effective date, with no retrospective effect. The Partnership elected to use this new optional transition approach. The Partnership adopted ASU 2016-02 on January 1, 2019. To determine the cumulative effect adjustment, the Partnership has not reassessed whether any expired or existing contracts are, or contain leases, has not reassessed lease classification, and has not reassessed initial direct costs for any existing leases. The adoption of ASU 2016-02 has resulted in a change in the accounting method for the lease portion of the daily charter hire for the Partnership's chartered-in vessels accounted for as operating leases with firm periods of greater than one year. As of January 1, 2019, the Partnership had four in-chartered vessels in its fleet, the accounting for three of which vessels was impacted by the adoption of ASU 2016-02, as well as a small number of office leases. Under ASU 2016-02, the Partnership has recognized a right-of-use asset and a lease liability on the balance sheet for these charters and office leases based on the present value of future minimum lease payments, whereas previously no right-of-use asset or lease liability was recognized. The right-of-use asset and lease liability recognized on January 1, 2019 was $19.4 million and as at December 31, 2019 it was $57.7 million . As at December 31, 2019 , the right-of-use asset is included in Other assets, and the lease liability in Other current liabilities and Other long-term liabilities, on the Partnership's consolidated balance sheet. The pattern of expense recognition of chartered-in vessels is expected to remain substantially unchanged, unless the right-of-use asset becomes impaired. In addition, under ASU 2016-02, direct financing lease payments received have been presented as an operating cash inflow instead of an investing cash inflow in the statement of cash flows. Direct financing lease payments received during the year ended December 31, 2019 were $0.9 million . The Partnership’s FPSO contracts, contracts of affreightment (or CoAs ), time charters, and voyage charters include both a lease component, consisting of the lease of the vessel, and a non-lease component, consisting of operation of the vessel for the customer. The Partnership has elected to not separate the non-lease component from the lease component for all such charters, where the lease component is classified as an operating lease, and account for the combined components as an operating lease. In June 2016, the FASB issued Accounting Standards Update 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments (or ASU 2016-13 ). ASU 2016-13 replaces the incurred loss impairment methodology with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. This update became effective for the Partnership on January 1, 2020, with a modified-retrospective approach. The Partnership is currently evaluating the effect of adopting this new guidance. Based on the Partnership's preliminary assessment, adoption of ASU 2016-13 is not expected to have a material impact on the Partnership's consolidated financial statements. In December 2019, the FASB issued Accounting Standards Update 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (or ASU 2019-12 ), as part of its initiative to reduce complexity in the accounting standards. The amendments in ASU 2019-12 eliminate certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences, among other changes. The guidance becomes effective for annual reporting periods beginning after December 15, 2020 and interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. The Partnership is currently evaluating the effect of adopting this new guidance.

Fair Value Measurements and Fin

Fair Value Measurements and Financial Instruments	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements and Financial Instruments	Fair Value Measurements and Financial Instruments a) Fair value measurements The following methods and assumptions were used to estimate the fair value of each class of financial instrument: Cash and cash equivalents and restricted cash - The fair values of the Partnership’s cash and cash equivalents and restricted cash approximate their carrying amounts reported in the accompanying consolidated balance sheets. Derivative instruments – The fair value of the Partnership’s derivative instruments is the estimated amount that the Partnership would receive or pay to terminate the agreements at the reporting date, taking into account current interest rates, foreign exchange rates and the current credit worthiness of both the Partnership and the derivative counterparties. The estimated amount is the present value of future cash flows. The Partnership transacts all of its derivative instruments through investment-grade rated financial institutions at the time of the transaction. The Partnership’s interest rate swap agreements and foreign currency forward contracts require no collateral from these institutions. As at December 31, 2018, the Partnership had $1.2 million (December 31, 2019 - $ nil ) on deposit with the relevant counterparties as security for cross currency swap liabilities under certain master agreements. The deposit is presented in restricted cash on the consolidated balance sheet as at December 31, 2018. Long-term debt – The fair value of the Partnership’s fixed-rate and variable-rate long-term debt is either based on quoted market prices or estimated using discounted cash flow analysis based on rates currently available for debt with similar terms and remaining maturities and the current credit worthiness of the Partnership. Vessels held for sale - During 2019, the carrying values of the Navion Hispania and Stena Sirita shuttle tankers and the Petrojarl Cidade de Rio das Ostras (or Ostras ) FPSO unit were written down to their estimated fair values, using appraised values, as a result of the expected sales of the vessels. Vessels and equipment – During 2019, as a result of a reassessment of the future redeployment assumptions for one FPSO unit and the Arendal Spirit UMS, the Partnership determined that the units were impaired and wrote down the carrying value of the units to their estimated fair value based on a discounted cash flow approach. The Partnership determined the discounted cash flows for the one FPSO unit using the current contract's time-charter rates and operating costs, projected future use on the existing field, projected future upgrade costs, projected future use on new fields, and estimated residual value, discounted at an estimated market participant rate of 10% . The projected future uses take into consideration the Partnership’s projected time-charter rates that could be contracted in future periods. In establishing these estimates, the Partnership considered the specific attributes of this FPSO unit, current discussions with existing and potential customers, available field expansions and historical experience redeploying FPSO units. The Partnership determined the discounted cash flows for the Arendal Spirit UMS using the current lay-up costs, projected future redeployment opportunities, estimated residual value, and estimated sales price, discounted at an estimated market participant rate of 10% . The projected future redeployment opportunities take into consideration the Partnership’s projected time-charter rates that could be contracted in future periods. In establishing these estimates, the Partnership considered the specific attributes of this UMS, current discussions with potential customers, and available redeployment opportunities. Obligations related to finance leases - The fair values of the Partnership's obligations related to finance leases are estimated using discounted cash flow analyses, based on rates currently available for debt with similar terms and remaining maturities. Obligations related to finance leases are classified as Other current liabilities and Other long-term liabilities on the Partnership's consolidated balance sheet. The Partnership categorizes its fair value estimates using a fair value hierarchy based on the inputs used to measure fair value. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value as follows: Level 1. Observable inputs such as quoted prices in active markets; Level 2. Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and Level 3. Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions. The following table includes the estimated fair value and carrying value of those assets and liabilities that are measured at fair value on a recurring and non-recurring basis, as well as the estimated fair value of the Partnership’s financial instruments that are not accounted for at fair value on a recurring basis: December 31, 2019 December 31, 2018 Fair Value Hierarchy Level Carrying Amount Asset (Liability) $ Fair Value Asset (Liability) $ Carrying Amount Asset (Liability) $ Fair Value Asset (Liability) $ Recurring: Cash and cash equivalents and restricted cash Level 1 306,256 306,256 233,580 233,580 Derivatives instruments (note 12) Interest rate swap agreements Level 2 (163,972 ) (163,972 ) (107,074 ) (107,074 ) Cross currency swap agreement Level 2 — — (4,538 ) (4,538 ) Foreign currency forward contracts Level 2 575 575 (4,650 ) (4,650 ) Non-Recurring: Vessels held for sale ( note 18 ) Level 2 15,374 15,374 — — Vessels and equipment ( note 18 ) Level 2 176,577 176,577 — — Other: Long-term debt - public (note 8) Level 1 (1,067,740 ) (1,069,204 ) (1,027,696 ) (977,917 ) Long-term debt - non-public (note 8) Level 2 (2,111,210 ) (2,136,315 ) (2,070,046 ) (2,082,316 ) Due to related parties - current (notes 11c and 11j) Level 2 (20,000 ) (19,781 ) (125,000 ) (123,025 ) Obligations related to finance leases (note 14c) Level 2 (21,453 ) (23,800 ) — — b) Financing receivables The following table contains a summary of the Partnership’s financing receivables by type of borrower and the method by which the Partnership monitors the credit quality of its financing receivables on a quarterly basis: Credit Quality Indicator Grade Year Ended Year Ended Direct financing leases Payment activity Performing 3,875 4,793

Segment Reporting

Segment Reporting	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The Partnership is engaged in the international marine transportation of crude oil, the offshore processing and storage of crude oil, long-distance ocean towage and offshore installation services, and maintenance and safety services through the operation of its shuttle tankers, FSO units, FPSO units, towage and offshore installation vessels and UMS. The Partnership’s revenues are earned in international markets. The Partnership has six reportable segments: its FPSO segment; its shuttle tanker segment; its FSO segment; its UMS segment; its towage and offshore installation vessels (or towage ) segment; and its conventional tanker segment. The Partnership’s FPSO segment consists of its FPSO units to service its FPSO contracts. The Partnership’s shuttle tanker segment consists of shuttle tankers operating primarily on fixed-rate contracts of affreightment, time-charter contracts or bareboat charter contracts. The Partnership’s FSO segment consists of its FSO units subject to fixed-rate, time-charter contracts or bareboat charter contracts. The Partnership’s UMS segment consists of one unit currently in lay-up. The Partnership’s towage and offshore installation vessels segment consists of long-distance towage and offshore installation vessels which operate on time-charter or voyage charter contracts. During 2019, the Partnership redelivered its two in-chartered conventional tankers to their owners and ceased operations in this segment. The accounting policies applied to the reportable segments are the same as those used in the preparation of the Partnership’s consolidated financial statements. The following table presents revenues and percentage of consolidated revenues for customers that accounted for more than 10% of the Partnership’s consolidated revenues during the periods presented: (U.S. Dollars in millions) Year Ended Year Ended Year Ended Royal Dutch Shell Plc (1) $311.3 or 25% $327.6 or 23% $338.2 or 31% Equinor ASA (formerly Statoil ASA) (2) $170.8 or 13% $182.1 or 13% $114.5 or 10% Petroleo Brasileiro S.A. (1) — (3) $254.8 or 18% $190.7 or 17% Premier Oil (4) — (3) — (3) $113.5 or 10% (1) Shuttle tanker and FPSO segments. (2) Shuttle tanker and FSO segments. (3) Percentage of consolidated revenue was less than 10% . (4) FPSO segment. Effective for periods commencing on or after January 1, 2019, management and the chief operating decision maker has changed their primary measure for evaluating segment performance from income from vessel operations to Adjusted EBITDA. Adjusted EBITDA has also been presented for the years ended December 31, 2018 and 2017 to maintain comparability of segment performance between the periods reported in these consolidated financial statements. Adjusted EBITDA is defined as net loss before interest expense (net), income tax expense, and depreciation and amortization as adjusted to exclude certain items whose timing or amount cannot be reasonably estimated in advance or that are not considered representative of core operating performance. Such adjustments include vessel write-downs, gains or losses on the sale of vessels, unrealized gains or losses on derivative instruments, foreign exchange gains or losses, losses on debt repurchases, and certain other income or expenses. Adjusted EBITDA also excludes: realized gains or losses on interest rate swaps as management, in assessing the Partnership's performance, views these gains or losses as an element of interest expense; realized gains or losses on derivative instruments resulting from amendments or terminations of the underlying instruments; and equity income. Adjusted EBITDA also includes the Partnership's proportionate share of Adjusted EBITDA from its equity-accounted joint ventures and excludes the non-controlling interests' proportionate share of Adjusted EBITDA from the Partnership's consolidated joint ventures. The Partnership does not have control over the operations of, nor does it have any legal claim to the revenue and expenses of its investments in, its equity-accounted for joint ventures. Consequently, the cash flow generated by the Partnership’s investments in equity accounted joint ventures may not be available for use by the Partnership in the period that such cash flows are generated. The following tables include results for the Partnership’s FPSO unit segment; shuttle tanker segment; FSO unit segment; UMS segment; towage segment; and conventional tanker segment for the periods presented in these consolidated financial statements: Year ended December 31, 2019 FPSO Segment Shuttle Tanker Segment FSO Segment UMS Segment Towage Segment Conventional Tanker Segment Corporate/Eliminations (2) Total Revenues 492,658 549,587 140,117 2,940 74,726 7,972 — 1,268,000 Voyage expenses — (86,519 ) (800 ) (76 ) (37,530 ) (4,985 ) — (129,910 ) Vessel operating expenses (227,873 ) (126,433 ) (42,597 ) (1,216 ) (28,832 ) — — (426,951 ) Time-charter hire expenses — (40,108 ) — — — (4,319 ) — (44,427 ) General and administrative (1) (40,846 ) (20,788 ) (4,006 ) (6,100 ) (4,401 ) (104 ) — (76,245 ) Realized loss on foreign currency forward contracts — — — — — — (5,054 ) (5,054 ) Adjusted EBITDA from equity-accounted vessels 97,849 — — — — — — 97,849 Adjusted EBITDA attributable to non-controlling interests — (10,864 ) (500 ) — — — — (11,364 ) Adjusted EBITDA 321,788 264,875 92,214 (4,452 ) 3,963 (1,436 ) (5,054 ) 671,898 Equity income 32,794 — — — — — — 32,794 Investment in joint ventures 234,627 — — — — — — 234,627 Expenditures for vessels and equipment, including advances on newbuilding contracts (3) 8,284 185,156 6,967 922 110 — — 201,439 Expenditures for dry docking — 11,902 — — 1,644 — — 13,546 Year ended December 31, 2018 FPSO Segment Shuttle Tanker Segment FSO Segment UMS Segment Towage Segment Conventional Tanker Segment Corporate/Eliminations (2) Total Revenues (4) 533,186 636,413 136,557 36,536 53,327 21,325 (920 ) 1,416,424 Voyage expenses — (109,796 ) (769 ) (47 ) (28,925 ) (12,453 ) 182 (151,808 ) Vessel operating expenses (214,623 ) (149,226 ) (42,913 ) (3,679 ) (27,346 ) — 116 (437,671 ) Time-charter hire expenses — (36,421 ) — — — (16,195 ) — (52,616 ) General and administrative (1) (34,052 ) (21,763 ) (2,174 ) (3,547 ) (3,531 ) (360 ) — (65,427 ) Restructuring charge (1,520 ) — — — — — — (1,520 ) Realized loss on foreign currency forward contracts — — — — — — (1,228 ) (1,228 ) Adjusted EBITDA from equity-accounted vessels 92,637 — — — — — — 92,637 Adjusted EBITDA attributable to non-controlling interests — (15,593 ) (677 ) — — — — (16,270 ) Adjusted EBITDA 375,628 303,614 90,024 29,263 (6,475 ) (7,683 ) (1,850 ) 782,521 Equity income 39,458 — — — — — — 39,458 Investment in joint ventures 212,202 — — — — — — 212,202 Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs (3) 54,371 147,540 6,987 — 24,838 — — 233,736 Expenditures for dry docking — 22,135 — — 1,467 — — 23,602 Year ended December 31, 2017 FPSO Segment Shuttle Tanker Segment FSO Segment UMS Segment Towage Segment Conventional Tanker Segment Corporate/Eliminations (2) Total Revenues 458,388 536,852 66,901 4,236 38,771 14,022 (8,886 ) 1,110,284 Voyage expenses — (80,964 ) (1,172 ) (1,152 ) (17,727 ) (359 ) 1,930 (99,444 ) Vessel operating (expenses) recoveries (149,153 ) (129,517 ) (25,241 ) (33,656 ) (21,074 ) 10 5,067 (353,564 ) Time-charter hire expenses — (62,899 ) — — (925 ) (16,491 ) — (80,315 ) General and administrative (1) (33,046 ) (17,425 ) (1,864 ) (5,068 ) (4,486 ) (360 ) — (62,249 ) Restructuring charge (450 ) (210 ) — (2,004 ) — — — (2,664 ) Realized gain on foreign currency forward contracts — — — — — — 900 900 Adjusted EBITDA from equity-accounted vessels 33,360 — — — — — — 33,360 Adjusted EBITDA attributable to non-controlling interests — (23,035 ) (879 ) — — — — (23,914 ) Adjusted EBITDA 309,099 222,802 37,745 (37,644 ) (5,441 ) (3,178 ) (989 ) 522,394 Equity income 14,442 — — — — — — 14,442 Investment in joint ventures 169,875 — — — — — — 169,875 Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs (3) 193,817 216,157 88,039 3,931 31,316 — — 533,260 Expenditures for dry docking — 16,323 199 — 661 — — 17,183 (1) Includes direct general and administrative expenses and indirect general and administrative expenses (allocated to each segment based on estimated use of corporate resources). (2) Includes revenues and expenses earned and incurred between segments of the Partnership, during the years ended December 31, 2018 and 2017. (3) Expenditures for vessels and equipment, including advances on newbuilding contracts for the year ended December 31, 2019 includes: Shuttle Tanker Segment - installment payments on the seven shuttle tanker newbuildings (see note 14c). Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs for the year ended December 31, 2018 includes: FPSO Segment - upgrade costs on the Petrojarl I FPSO unit; Shuttle Tanker Segment - the final East Coast of Canada newbuilding installment payment and installment payments on six Shuttle Spirit shuttle tanker newbuildings (see note 14c); Towage Segment - the final installment payment on one newbuilding towage and offshore installation vessel. Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs for the year ended December 31, 2017 includes: FPSO Segment - upgrade costs on the Petrojarl I FPSO unit; Shuttle Tanker Segment - installment payments on the three East Coast of Canada shuttle tanker newbuildings and two Shuttle Spirit shuttle tanker newbuildings (see note 14c); FSO Segment - conversion costs on the Randgrid FSO unit; Towage Segment - installment payments on three newbuilding towage and offshore installation vessels. (4) Includes revenues of $55.0 million and $36.5 million in the Shuttle Tanker and UMS segments, respectively, during the year ended December 31, 2018 related to a settlement agreement with Petrobras and Petroleo Netherlands B.V. - PNBV S.A. (or Petrobras ) in relation to the previously-terminated charter contracts of the HiLoad DP unit and Arendal Spirit UMS (see note 5). The following table includes reconciliations of Adjusted EBITDA to net loss for the periods presented in these consolidated financial statements: Year ended December 31, 2019 Year ended December 31, 2018 Year ended December 31, 2017 Adjusted EBITDA 671,898 782,521 522,394 Depreciation and amortization (1) (349,379 ) (372,290 ) (309,975 ) (Write-down) and gain on sale of vessels (2) (332,125 ) (223,355 ) (318,078 ) Interest expense (205,709 ) (199,395 ) (154,890 ) Interest income 5,111 3,598 2,707 Realized and unrealized (loss) gain on derivative instruments (3) (80,141 ) 14,036 (43,753 ) Foreign currency exchange gain (loss) 2,193 (9,413 ) (14,006 ) Losses on debt repurchases — (55,479 ) (3,102 ) Other (expense) income - net (1,225 ) (4,602 ) 14,167 Expenses and losses relating to equity accounted investments (4) (65,055 ) (53,179 ) (18,918 ) Adjusted EBITDA attributable to non-controlling interests 11,364 16,270 23,914 Loss before income tax (expense) recovery (343,068 ) (101,288 ) (299,540 ) Income tax (expense) recovery (7,827 ) (22,657 ) 98 Net loss (350,895 ) (123,945 ) (299,442 ) (1) Depreciation and amortization by segment for the year ended December 31, 2019 is as follows: FPSO $145.9 million , Shuttle Tanker $134.3 million , FSO $41.7 million , UMS $6.6 million and Towage $20.9 million . Depreciation and amortization by segment for the year ended December 31, 2018 is as follows: FPSO $145.5 million , Shuttle Tanker $155.9 million , FSO $44.1 million , UMS $6.6 million , Towage $20.3 million and eliminations of amounts incurred between segments of ($0.1) million . Depreciation and amortization by segment for the year ended December 31, 2017 is as follows: FPSO $143.6 million , Shuttle Tanker $125.6 million , FSO $19.4 million , UMS $6.6 million , Towage $15.6 million and eliminations of amounts incurred between segments of ($0.8) million . (2) (Write-down) and gain on sale of vessels by segment for the year ended December 31, 2019 is as follows: FPSO ($227.4) million , Shuttle Tanker ($0.9) million , FSO $11.2 million , UMS ($115.0) million . (Write-down) and gain on sale of vessels by segment for the year ended December 31, 2018 is as follows: FPSO ($180.2) million , Shuttle Tanker ($43.2) million . (Write-down) and gain on sale of vessels by segment for the year ended December 31, 2017 is as follows: FPSO ($265.2) million , Shuttle Tanker ($51.7) million , FSO ($1.1) million . (3) Excludes the realized gain (loss) on foreign currency forward contracts. (4) Includes depreciation and amortization, interest expense, interest income, realized and unrealized gain (loss) on derivative instruments, foreign currency exchange gain (loss) and income tax expense relating to equity accounted investments. The sum of (a) Adjusted EBITDA from equity-accounted vessels as presented in the tables above as part of the results for the Partnership’s reportable segments and (b) expenses and gains (losses) relating to equity accounted investments from this table equals the amount of equity income included on the Partnership's consolidated statements of loss. A reconciliation of total segment assets to total assets presented in the accompanying consolidated balance sheets is as follows: December 31, 2019 December 31, 2018 FPSO segment 1,913,420 2,279,277 Shuttle tanker segment 1,778,073 1,684,887 FSO segment 425,694 463,647 Towage segment 390,895 419,000 UMS segment 101,009 220,509 Conventional tanker segment — 4,259 Unallocated: Cash and cash equivalents and restricted cash 306,256 233,580 Other assets 7,920 6,893 Consolidated total assets 4,923,267 5,312,052

Revenues

Revenues	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenues	Revenue The Partnership’s primary source of revenues is chartering its vessels and offshore units to its customers. The Partnership utilizes five primary forms of contracts, consisting of FPSO contracts, CoAs, time-charter contracts, bareboat charter contracts and voyage charter contracts. During the year ended December 31, 2019 , the Partnership also generated revenues from the operation of VOC systems on six of the Partnership’s shuttle tankers, and the management of three FPSO units and one FSO unit (December 31, 2018 - VOC systems on 13 of the Partnership's shuttle tankers, and the management of three FPSO units, one FSO unit and two shuttle tankers) on behalf of the disponent owners or charterers of these assets. FPSO Contracts Pursuant to an FPSO contract, the Partnership charters an FPSO unit to a customer for a fixed period of time, generally more than one year. The performance obligations within an FPSO contract, which include the lease of the FPSO unit to the charterer as well as the operation of the FPSO unit, are satisfied as services are rendered over the duration of such contract, as measured using the time that has elapsed from commencement of performance. Fees relating to the lease and operation of the FPSO (or hire ) are typically invoiced monthly in arrears, based on a fixed daily hire amount. In certain FPSO contracts, the Partnership is entitled to a lump sum amount due upon commencement of the contract and may also be entitled to termination fees if the contract is canceled early. While the fixed daily hire amount may be the same over the term of the FPSO contract, in certain cases, the daily hire amount declines over the duration of the FPSO contract. As a result of the Partnership accounting for compensation from such charters on a straight-line basis over the duration of the charter, FPSO contracts where revenues are recognized before the Partnership is entitled to such amounts under the FPSO contracts will result in the Partnership recognizing a contract asset and FPSO contracts where revenues are recognized after the Partnership is entitled to such amounts under the FPSO contracts will result in the Partnership recognizing a contract liability. Some FPSO contracts include variable consideration components in the form of expense adjustments or reimbursements, incentive compensation and penalties. For example, some FPSO contracts contain provisions that allow the Partnership to be compensated for increases in the Partnership's costs to operate the unit during the term of the contract. Such provisions may be in the form of annual hire rate adjustments for changes in inflation indices or foreign currency rates, or in the form of cost reimbursements for vessel operating expenditures incurred. The Partnership may also earn additional compensation from periodic production tariffs, which are based on the volume of oil produced, the price of oil, as well as other monthly or annual operational performance measures. During periods in which production on the FPSO unit is interrupted, penalties may be imposed. Variable consideration under the Partnership’s contracts is typically recognized as incurred as either such revenues are allocated and accounted for under lease accounting requirements or alternatively such consideration is allocated to the distinct period in which such variable consideration was earned. The Partnership does not engage in any specific tactics to minimize residual value risk. Given the uncertainty involved in oil field production estimates and the resulting impact on oil field life, FPSO contracts typically will include extension options or options to terminate early. Contracts of Affreightment Voyages performed pursuant to a CoA for the Partnership’s shuttle tankers are priced based on the pre-agreed terms in the CoA. The performance obligations within a voyage performed pursuant to a CoA, which will typically include the lease of the vessel to the charterer as well as the operation of the vessel, are satisfied as services are rendered over the duration of the voyage, as measured using the time that has elapsed from commencement of performance. In addition, any expenses that are unique to a particular voyage, including any bunker fuel expenses, port fees, cargo loading and unloading expenses, canal tolls, agency fees and commissions, are the responsibility of the vessel owner. Consideration for such voyages consists of a fixed daily hire rate for the duration of the voyage, the reimbursement of costs incurred from fuel consumed during the voyage, as well as a fixed lump sum intended to compensate for time necessary for the vessel to return to the field following completion of the voyage. While such consideration is generally fixed, certain sources of variability exist, including variability in the duration of the voyage and the actual quantity of fuel consumed during the voyage. Payment for the voyage is not due until the voyage is completed. The duration of a single voyage will typically be less than two weeks. The Partnership does not engage in any specific tactics to minimize residual value risk due to the short-term nature of the contracts. Time Charter Contracts Pursuant to a time charter contract, the Partnership charters a vessel or FSO unit to a customer for a fixed period of time, generally one year or more. The performance obligations within a time-charter contract, which will include the lease of the vessel to the charterer as well as the operation of the vessel, are satisfied as services are rendered over the duration of such contract, as measured using the time that has elapsed from commencement of performance. In addition, any expenses that are unique to a particular voyage, including any bunker fuel expenses, port fees, cargo loading and unloading expenses, canal tolls, agency fees and commissions, are the responsibility of the customer, as long as the vessel is not off-hire. Hire is typically invoiced monthly in advance for time-charter contracts, based on a fixed daily hire amount. In certain long-term time-charters, the fixed daily hire amount will increase on an annual basis by a fixed amount to offset expected increases in operating costs. As a result of the Partnership accounting for compensation from such charters on a straight-line basis over the duration of the charter, such fixed increases in rate will result in revenues being accrued in the first half of the charter and such amount drawn down in the last half of the charter. Some time charters include variable consideration components in the form of expense adjustments or reimbursements, incentive compensation and penalties. For example, certain time charters contain provisions that allow the Partnership to be compensated for increases in the Partnership's costs during the term of the charter. Such provisions may be in the form of annual hire rate adjustments for changes in inflation indices or in the form of cost reimbursements for vessel operating expenditures or drydocking expenditures. During periods in which the vessels are off-hire or minimum speed and performance metrics are not met, penalties may be imposed. Variable consideration under the Partnership’s contracts is typically recognized as incurred as either such revenues are allocated and accounted for under lease accounting requirements or alternatively such consideration is allocated to the distinct period in which such variable consideration was earned. The Partnership does not engage in any specific tactics to minimize residual value risk. The time charters for four shuttle tankers servicing the East Coast Canada project can be canceled upon two years' notice. The time charters for four shuttle tankers in Brazil can be extended by up to ten years , at the election of the charterer. The time charters for the vessels servicing the Equinor North Sea requirements under the terms of a master agreement are one year in length and may be renewed for subsequent one -year periods. The number of vessels required under the terms of the master agreement may be adjusted annually based on the requirements of the fields serviced. The time charter contracts for three FSO units can be extended for periods between five and 12 years or terminated early. Bareboat Charter Contracts Pursuant to a bareboat charter contract, the Partnership charters a vessel or FSO unit to a customer for a fixed period of time, generally one year or more, at rates that are generally fixed. However, the customer is responsible for operation and maintenance of the vessel with their own crew as well as any expenses that are unique to a particular voyage, including any bunker fuel expenses, port fees, cargo loading and unloading expenses, canal tolls, agency fees and commissions. If the vessel goes off-hire due to a mechanical issue or any other reason, the monthly hire received by the vessel owner is normally not impacted by such events. The performance obligations within a bareboat charter, which will include the lease of the vessel to the charterer, are satisfied as over the duration of such contract, as measured using the time that has elapsed from commencement of the lease. Hire is typically invoiced monthly in advance for bareboat charters, based on a fixed daily hire amount. Voyage Charters Voyage charters are charters for a specific voyage. Voyage charters for the Partnership’s shuttle tankers, conventional tankers and towage and offshore installation vessels are priced on a current or “spot” market rate. The performance obligations within a voyage charter contract, which will typically include the lease of the vessel to the charterer as well as the operation of the vessel, are satisfied as services are rendered over the duration of the voyage, as measured using the time that has elapsed from commencement of performance. In addition, expenses that are unique to a particular voyage, including any bunker fuel expenses, port fees, cargo loading and unloading expenses, canal tolls, agency fees and commissions, are the responsibility of the vessel owner. The Partnership’s voyage charters for shuttle tankers and conventional tankers will normally contain a lease, whereas for towage and offshore installation vessels such contracts will not normally contain a lease. Such determination involves judgment about the decision-making rights the charterer has within the contract. Consideration for such contracts is generally fixed; however, certain sources of variability exist. Delays caused by the charterer result in additional consideration. Payment for the voyage is not due until the voyage is completed. The duration of a single voyage will typically be less than three months. The Partnership does not engage in any specific tactics to minimize residual value risk due to the short-term nature of the contracts. Management Fees and Other During the year ended December 31, 2019 , the Partnership also generated revenues from the operation of VOC systems on six of the Partnership’s shuttle tankers, and the management of three FPSO units and one FSO unit (December 31, 2018 - VOC systems on 13 of the Partnership's shuttle tankers, and the management of three FPSO units, one FSO unit and two shuttle tankers) on behalf of the disponent owners or charterers of these assets. Such services include the arrangement of third-party goods and services for the asset’s disponent owner or charterer. The performance obligations within these contracts will typically consist of crewing, technical management, insurance and, potentially, commercial management. The performance obligations are satisfied concurrently and consecutively rendered over the duration of the management contract, as measured using the time that has elapsed from commencement of performance. Consideration for such contracts will generally consist of a fixed monthly management fee, plus the reimbursement of crewing costs for vessels being managed and all operational costs for the VOC systems. Management fees are typically invoiced monthly. Revenue Table The following tables contain the Partnership’s revenue for the years ended December 31, 2019 , 2018 and 2017 , by contract type and by segment: Year ended December 31, 2019 FPSO Segment Shuttle Tanker Segment FSO Segment UMS Segment Towage Segment Conventional Tanker Segment Eliminations Total FPSO contracts 421,363 — — — — — — 421,363 CoAs — 188,277 — — — — — 188,277 Time charters — 293,095 121,762 — — — — 414,857 Bareboat charters — 34,611 15,178 — — — — 49,789 Voyage charters — 24,315 — — 74,726 7,972 — 107,013 Management fees and other 71,295 9,289 3,177 2,940 — — — 86,701 492,658 549,587 140,117 2,940 74,726 7,972 — 1,268,000 Year ended December 31, 2018 FPSO Segment Shuttle Tanker Segment FSO Segment UMS Segment Towage Segment Conventional Tanker Segment Eliminations (1) Total FPSO contracts 481,700 — — — — — — 481,700 CoAs — 198,448 — — — — — 198,448 Time charters — 294,112 116,125 — — — — 410,237 Bareboat charters — 44,759 17,383 — — — — 62,142 Voyage charters — 28,027 — — 53,327 21,325 (920 ) 101,759 Management fees and other (2) 51,486 71,067 3,049 36,536 — — — 162,138 533,186 636,413 136,557 36,536 53,327 21,325 (920 ) 1,416,424 Year ended December 31, 2017 FPSO Segment Shuttle Tanker Segment FSO Segment UMS Segment Towage Segment Conventional Tanker Segment Eliminations (1) Total FPSO contracts 458,388 — — — — — — 458,388 CoAs — 170,703 — — — — — 170,703 Time charters — 284,281 47,605 4,236 — 9,132 — 345,254 Bareboat charters — 69,568 19,296 — — — — 88,864 Voyage charters — 12,300 — — 38,771 4,890 (8,886 ) 47,075 458,388 536,852 66,901 4,236 38,771 14,022 (8,886 ) 1,110,284 (1) Includes revenues earned between segments of the Partnership, during the years ended December 31, 2018 and December 31, 2017. (2) Includes revenues of $55.0 million and $36.5 million in the shuttle tanker and UMS segments, respectively, related to a settlement agreement with Petrobras in relation to the previously-terminated charter contracts of the HiLoad DP unit and Arendal Spirit UMS. As part of the settlement agreement, Petrobras has agreed to pay a total amount of $96.0 million to the Partnership, which includes $55.0 million that was paid November 2018, and amounts of $22.0 million payable in late-2020 and $19.0 million payable in late-2021, which are available to be reduced by 40% of the revenues paid prior to the end of 2021 by Petrobras under any new contracts entered into subsequent to October 25, 2018 relating specifically to the Arendal Spirit UMS and the Ostras and Piranema Spirit FPSO units. The following table contains the Partnership’s revenue by lease and non-lease contracts for the years ended December 31, 2019 , 2018 and 2017 : Year ended December 31, 2019 2018 2017 $ $ $ Lease revenue Lease revenue from lease payments of direct financing and sales type leases 858 1,720 2,396 Lease revenue from lease payments of operating leases 1,079,356 1,175,073 1,028,123 Variable lease payments - cost reimbursements (1) 11,314 19,316 33,159 Variable lease payments (2) 15,045 303 2,022 1,106,573 1,196,412 1,065,700 Non-lease revenue Non-lease revenue - related to sales type or direct financing leases — 4,547 5,813 Voyage charters - towage 74,726 53,327 38,771 Management fees and other 86,701 162,138 — 161,427 220,012 44,584 1,268,000 1,416,424 1,110,284 (1) Reimbursements for vessel operating expenditures received from the Partnership’s customers relating to such costs incurred by the Partnership to operate the vessel for the customer. (2) Compensation from production tariffs, which are based on the volume of oil produced, the price of oil, as well as other monthly or annual operational performance measures. Contract Assets and Liabilities Certain customer contracts that the Partnership enters into will result in situations where the customer will pay consideration for performance to be provided in the following month or months. These receipts are a contract liability and are presented as deferred revenue until performance is provided. In other cases, the Partnership will provide performance in the month or months prior to it being entitled to invoice for such performance. This results in such receipts being reflected as a contract asset that is presented within other current assets. In addition to these short-term timing differences between the timing of revenue recognition and when the entity’s right to consideration in exchange for goods or services is unconditional, the Partnership has long-term charter arrangements whereby it has received payments that are larger in the early periods of the arrangements and long-term charter arrangements whereby it will receive payments that are larger in the latter periods of the arrangements. The following table presents the contract assets and contract liabilities on the Partnership’s consolidated balance sheets associated with these long-term charter arrangements from contracts with customers: December 31, 2019 December 31, 2018 $ $ Contract Assets Current 3,816 7,926 Non-Current 74,830 62,295 78,646 70,221 Contract Liabilities Current 53,728 55,750 Non-Current 84,077 145,852 137,805 201,602 During the year ended December 31, 2019 the Partnership recognized revenue of $53.1 million , that was included in the contract liability on December 31, 2018. Contract Costs In certain cases, the Partnership incurs pre-operational costs that relate directly to a specific customer contract, that generate or enhance resources of the Partnership that will be used in satisfying performance obligations in the future, whereby such costs are expected to be recovered via the customer contract. These costs include costs incurred to mobilize an offshore asset to an oil field, pre-operational costs incurred to prepare for commencement of operations of an offshore asset or costs incurred to reposition a vessel to a location where a charterer will take delivery of the vessel. In certain cases, the Partnership will need to make judgments about whether costs relate directly to a specific customer contract and whether costs were factored into the pricing of a customer contract and thus expected to be recovered. Such deferred costs are amortized into vessel operating expenses over the duration of the customer contract. Amortization of such costs for the Partnership for the year ended December 31, 2019 , 2018 and 2017 was $20.9 million , $19.7 million and $24.1 million , respectively. The balances of assets recognized from the costs to fulfill a contract with a customer classified as other assets, split between current and non-current portions, on the Partnership's balance sheet, by main category, excluding balances in the Partnership’s equity accounted joint ventures, are as follows: Year ended December 31, 2019 2018 2017 $ $ $ Pre-operational costs 12,836 24,031 4,522 Offshore asset mobilization costs 35,632 51,302 57,818 Vessel repositioning costs 13,379 15,188 — 61,847 90,521 62,340

Goodwill and In-Process Revenue

Goodwill and In-Process Revenue Contracts	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and In-Process Revenue Contracts	Goodwill and In-Process Revenue Contracts a) Goodwill The carrying amount of goodwill for the shuttle tanker segment was $127.1 million as at December 31, 2019 and 2018 . In 2019 , 2018 and 2017 , the Partnership conducted its annual goodwill impairment review of its shuttle tanker segment and concluded that no impairment had occurred. The carrying amount of goodwill for the towage segment was $2.0 million as at December 31, 2019 and 2018 . In 2019 , 2018 and 2017 , the Partnership conducted its annual goodwill impairment review of its towage segment and concluded that no impairment had occurred. b) In-Process Revenue Contracts As part of the Partnership’s acquisition of the Piranema Spirit FPSO unit on November 30, 2011, the Partnership assumed an FPSO contract with terms that were less favorable than the then prevailing market terms and recorded a liability based on the estimated fair value of the contract. The Partnership amortized this liability over the term of the contract, which completed during 2019, on a weighted basis based on the revenue earned under the contract. Amortization of in-process revenue contracts for the year ended December 31, 2019 was $15.1 million ( 2018 - $35.2 million , 2017 - $12.7 million ), which is included in revenues on the consolidated statements of loss .

Accrued Liabilities

Accrued Liabilities	12 Months Ended
	Dec. 31, 2019
Payables and Accruals [Abstract]
Accrued Liabilities	Accrued Liabilities December 31, 2019 December 31, 2018 Interest including interest rate swaps 48,047 44,887 Payroll and benefits 36,807 34,828 Audit, legal, contingency and other general expenses 32,372 21,626 Voyage and vessel expenses 19,829 25,475 Income and other tax payable 3,921 3,080 140,976 129,896

Long-Term Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt December 31, 2019 December 31, 2018 U.S. Dollar-denominated Revolving Credit Facilities due through 2024 513,200 523,125 U.S. Dollar-denominated Term Loans due through 2032 1,357,236 1,388,107 U.S. Dollar-denominated Term Loan due through 2021 42,073 55,018 U.S. Dollar Bonds due through 2024 1,075,000 1,024,816 U.S. Dollar Non-Public Bonds due through 2027 241,145 141,158 Norwegian Krone Bonds due through 2019 — 9,953 Total principal 3,228,654 3,142,177 Less debt issuance costs and other (49,704 ) (44,435 ) Total debt 3,178,950 3,097,742 Less current portion (353,238 ) (554,336 ) Long-term portion 2,825,712 2,543,406 As at December 31, 2019 , the Partnership had two revolving credit facilities ( December 31, 2018 - two ), which, as at such date, provided for total borrowings of up to $513.2 million ( December 31, 2018 - $523.1 million ) and were fully drawn ( December 31, 2018 - fully drawn). The total amount available under the revolving credit facilities reduces by $73.6 million ( 2020 ), $73.6 million ( 2021 ), $103.6 million ( 2022 ), $53.6 million ( 2023 ) and $208.8 million (2024). One revolving credit facility is guaranteed by the Partnership for all outstanding amounts and contains covenants that require the Partnership to maintain a minimum liquidity (cash, cash equivalents and undrawn committed revolving credit lines with at least six months to maturity) in an amount equal to the greater of $75.0 million and 5.0% of the Partnership’s total consolidated debt. The other revolving credit facility is guaranteed by subsidiaries of the Partnership, and contains covenants that require Teekay Shuttle Tankers L.L.C. (a wholly-owned subsidiary of the Partnership which was formed during 2017 to hold the Partnership’s shuttle tanker fleet) to maintain a minimum liquidity (cash, cash equivalents and undrawn committed revolving credit lines with at least six months to maturity) in an amount equal to the greater of $35.0 million and 5.0% of Teekay Shuttle Tankers L.L.C.'s total consolidated debt, and a net debt to total capitalization ratio no greater than 75.0% . The revolving credit facilities are collateralized by first-priority mortgages granted on 17 ( December 31, 2018 - 19 ) of the Partnership’s vessels, together with other related security. As at December 31, 2019 , the Partnership had term loans outstanding secured by three shuttle tankers, two FSO units, two FPSO units, ten towage and offshore installation vessels, four shuttle tanker newbuildings, and the Arendal Spirit UMS, which totaled $1.4 billion in the aggregate. (December 31, 2018 - secured by three shuttle tankers, two FSO units, three FPSO units, ten towage and offshore installation vessels, four shuttle tanker newbuildings, and the Arendal Spirit UMS, which totaled $1.4 billion ). The term loans reduce over time with quarterly or semi-annual payments and have varying maturities through 2032. As at December 31, 2019 , the Partnership or a subsidiary of the Partnership had guaranteed all of these term loans. As at December 31, 2019 , two of the Partnership’s 50% -owned subsidiaries had one outstanding term loan ( December 31, 2018 - one ), which totaled $42.1 million ( December 31, 2018 - $55.0 million ). The term loan reduces over time with quarterly payments and matures in 2021. The term loan is collateralized by first-priority mortgages on the two shuttle tankers to which the loan relates, together with other related security. As at December 31, 2019 , a subsidiary of the Partnership guaranteed $21.0 million of the term loan, which represents its 50% share of the outstanding term loan, and the other owner had guaranteed the remaining $21.0 million of the term loan. Interest payments on the revolving credit facilities and the term loans are based on LIBOR plus margins, except for $71.6 million of one tranche of the term loan for the towage and offshore installation vessels, which is fixed at 2.93% and $79.2 million of one tranche of the term loan for the shuttle tanker newbuildings, which is fixed at 4.55% . At December 31, 2019 , the margins for variable rate facilities and loans ranged between 0.90% and 4.30% , ( December 31, 2018 , 0.90% and 4.30% ). The weighted-average interest rate on the Partnership’s variable rate facilities and loans as at December 31, 2019 was 4.3% ( December 31, 2018 – 5.1% ). This rate does not include the effect of the Partnership’s interest rate swaps (see note 12 ), fixed rate facilities or variable rate bonds. In October 2019, the Partnership's wholly-owned subsidiary Teekay Shuttle Tankers L.L.C. issued $125.0 million in senior unsecured green bonds in the Norwegian bond market that mature in October 2024. These bonds are listed on the Oslo Stock Exchange. The interest payments on the bonds are based on LIBOR plus a margin of 6.50% . As at December 31, 2019 , the carrying amount of the bonds was $125.0 million (December 31, 2018 - nil ) . In July 2018, the Partnership issued, in a U.S. private placement, $700.0 million of five -year senior unsecured bonds that mature in July 2023. The interest payments on the bonds are fixed at a rate of 8.50% . The bonds contain certain incurrence-based covenants. As at December 31, 2019 , the carrying amount of the bonds was $700.0 million . Brookfield Business Partners L.P. and its institutional investors (or Brookfield ) purchased $500.0 million of these bonds and as at December 31, 2019 held $423.6 million of these bonds (December 31, 2018 - $475.0 million ) (see note 11k). In August 2017, the Partnership's wholly-owned subsidiary Teekay Shuttle Tankers L.L.C. issued $250.0 million in senior unsecured bonds in the Norwegian bond market that mature in August 2022. These bonds are listed on the Oslo Stock Exchange. The interest payments on the bonds are fixed at a rate of 7.125% . As at December 31, 2019 , the carrying amount of the bonds was $250.0 million (December 31, 2018 - $250.0 million ). In September 2019, the Partnership issued $120.0 million in senior bonds in a U.S. private placement that mature in September 2027. The interest payments on the bonds are fixed at a rate of 7.107% . The bonds are collateralized by certain related security and are guaranteed by the Partnership. The Partnership makes semi-annual repayments on the bonds and as at December 31, 2019 , the carrying amount of the bonds was $119.0 million (December 31, 2018 - nil ). In February 2015, the Partnership issued $30.0 million in senior bonds in a U.S. private placement that mature in July 2024. The interest payments on the bonds are fixed at a rate of 4.27% . The bonds are collateralized by a first-priority mortgage on the Dampier Spirit FSO unit, together with other related security, and are guaranteed by subsidiaries of the Partnership. The Partnership makes semi-annual repayments on the bonds and as at December 31, 2019 , the carrying amount of the bonds was $13.6 million (December 31, 2018 - $ 17.2 million ). In September 2013 and November 2013, the Partnership issued, in a U.S. private placement, a total of $174.2 million of ten -year senior bonds that mature in January 2024, to finance the Bossa Nova Spirit and Sertanejo Spirit shuttle tankers. The bonds accrue interest at a fixed combined rate of 4.96% . The bonds are collateralized by first-priority mortgages on the two vessels to which the bonds relate, together with other related security, and are guaranteed by subsidiaries of the Partnership. The Partnership makes semi-annual repayments on the bonds and as at December 31, 2019 , the carrying amount of the bonds was $108.6 million (December 31, 2018 - $123.9 million ). The aggregate annual long-term debt principal repayments required to be made subsequent to December 31, 2019 , are $354.4 million ( 2020 ), $315.7 million ( 2021 ), $577.7 million ( 2022 ), $1,113.3 million ( 2023 ), $453.2 million ( 2024 ), and $414.4 million (thereafter). Certain of the Partnership’s revolving credit facilities, term loans and bonds contain covenants, debt-service coverage ratio (or DSCR ) requirements and other restrictions typical of debt financing secured by vessels that restrict the ship-owning subsidiaries from, among other things: incurring or guaranteeing indebtedness; changing ownership or structure, including mergers, consolidations, liquidations and dissolutions; paying dividends or distributions if the Partnership is in default or does not meet minimum DSCR requirements; making capital expenditures in excess of specified levels; making certain negative pledges and granting certain liens; selling, transferring, assigning or conveying assets; making certain loans and investments; or entering into a new line of business. Obligations under the Partnership’s credit facilities are secured by certain vessels, and if the Partnership is unable to repay debt under the credit facilities, the lenders could seek to foreclose on those assets. The Partnership has two revolving credit facilities and seven term loans that require the Partnership to maintain vessel values to drawn principal balance ratios of a minimum range of 100% to 150% . Such requirement is assessed either on a semi-annual or annual basis, with reference to vessel valuations compiled by one or more agreed upon third parties. Should the ratio drop below the required amount, the lender may request the Partnership to either prepay a portion of the loan in the amount of the shortfall or provide additional collateral in the amount of the shortfall, at the Partnership's option. As at December 31, 2019 , these hull covenant ratios were estimated to range from 126% to 501% and the Partnership was in compliance with the minimum ratios required. The vessel values used in calculating these ratios are the appraised values provided by third parties where available, or prepared by the Partnership based on second-hand sale and purchase market data. Changes in the shuttle tanker, towage, UMS, FSO unit or FPSO unit markets could negatively affect these ratios. As at December 31, 2019 , the Partnership was in compliance with all covenants related to the credit facilities and consolidated long-term debt.

Leases

Leases	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Leases	Leases Charters-out The cost, accumulated depreciation and carrying amount of the Partnership's vessels with charter-out contracts accounted for as operating leases at December 31, 2019 were $3.8 billion , $1.1 billion and $2.7 billion , respectively ( 2018 - $4.3 billion , $1.1 billion and $3.2 billion , respectively). As at December 31, 2019 , minimum scheduled future rentals under these then-in-place time charters and bareboat charters to be received by the Partnership, were approximately $2.9 billion , comprised of $704.3 million ( 2020 ), $590.7 million ( 2021 ), $512.5 million ( 2022 ), $299.3 million ( 2023 ), $133.6 million ( 2024 ) and $622.2 million (thereafter). The minimum scheduled future revenues should not be construed to reflect total charter hire revenues for any of the years. Minimum scheduled future revenues do not include revenue generated from new contracts entered into after December 31, 2019 , revenue from unexercised option periods of contracts that existed on December 31, 2019 , or variable or contingent revenues. The amounts may vary given unscheduled future events such as vessel maintenance. For a further description of the Partnership's charter-out contracts please see note 5. Direct Financing Lease Leasing of certain VOC equipment is accounted for as a direct financing lease. As at December 31, 2019 , the minimum lease payments receivable under the direct financing lease approximated $4.6 million ( 2018 - $ 5.9 million ), including unearned income of $0.7 million ( 2018 - $1.1 million ). As at December 31, 2019 , future scheduled payments under the direct financing leases to be received by the Partnership, were approximately $4.6 million , comprised of $1.3 million ( 2020 ), $1.3 million ( 2021 ), $1.3 million ( 2022 ) and $0.6 million ( 2023 ). Charters-in The Partnership charters in vessels from other vessel owners on time-charter contracts, whereby the vessel owner will provide use of the vessel to the Partnership, as well as operate the vessel for the Partnership. A time-charter contract is typically for a fixed period of time, although in certain cases the Partnership may have the option to extend the charter. The Partnership will typically pay the owner a daily hire rate that is fixed over the duration of the charter. The Partnership is generally not required to pay the daily hire rate during periods the vessel is not able to operate. The Partnership has determined that all of its time-charter-in contracts contain both a lease component (lease of the vessel) and a non-lease component (operation of the vessel). The Partnership has allocated the contract consideration between the lease component and non-lease component on a relative standalone selling price basis. The standalone selling price of the non-lease component has been determined using a cost-plus approach, whereby the Partnership estimates the cost to operate the vessel using cost benchmarking studies prepared by a third party, when available, or internal estimates when not available, plus a profit margin. The standalone selling price of the lease component has been determined using an adjusted market approach, whereby the Partnership calculates a rate excluding the operating component based on a market time-charter rate from published broker estimates, when available, or internal estimates when not available. Given that there are no observable standalone selling prices for either of these two components, judgment is required in determining the standalone selling price of each component. The discount rate of the lease is determined using the Partnership’s incremental borrowing rate, which is based on the fixed interest rate the Partnership could obtain when entering into a secured loan facility of similar term. With respect to time-charter-in contracts with an original term of more than one year, for the year ended December 31, 2019 , the Partnership incurred $22.0 million of time-charter hire expense related to these time-charter-in contracts, of which $13.0 million was allocated to the lease component and $9.0 million was allocated to the non-lease component. The $13.0 million allocated to the lease component approximates the cash paid for the amounts included in lease liabilities and is reflected as a reduction in operating cash flows for the year ended December 31, 2019 . As at December 31, 2019 , the weighted-average remaining lease term and weighted-average discount rate for these time-charter-in contracts was 4.0 years and 5.29% , respectively. The Partnership has elected to recognize the lease payments of short-term leases in profit or loss on a straight-line basis over the lease term and variable lease payments in the period in which the obligation for those payments is incurred, which is consistent with the recognition of payment for the non-lease component. Short-term leases are leases with an original term of one year or less, excluding those leases with an option to extend the lease for greater than one year or an option to purchase the underlying asset that the lessee is reasonably certain to exercise. For the year ended December 31, 2019 , the Partnership incurred $22.4 million of time-charter hire expense related to time-charter contracts classified as short-term leases. A maturity analysis of the Partnership’s operating lease liabilities from time-charter-in contracts (excluding short-term leases) as at December 31, 2019 is as follows: Lease Commitment Non-Lease Commitment Total Commitment As at December 31, 2019 $ $ $ Payments: January to December 2020 11,694 7,552 19,246 January to December 2021 11,829 7,639 19,468 January to December 2022 11,995 7,746 19,741 January to December 2023 11,225 7,249 18,474 January to December 2024 641 414 1,055 Total payments 47,384 30,600 77,984 Less imputed interest (4,840 ) Carrying value of operating lease liabilities 42,544 As at December 31, 2019 , minimum commitments to be incurred by the Partnership under short-term time-charter contracts were approximately $16.0 million ( 2020 ) and $2.3 million ( 2021 ).

Restructuring Charge

Restructuring Charge	12 Months Ended
	Dec. 31, 2019
Restructuring and Related Activities [Abstract]
Restructuring Charge	Restructuring Charge During the year ended December 31, 2018 , the Partnership recognized a restructuring charge of $1.5 million , mainly relating to severance costs from crew reduction on the Petrojarl Varg FPSO unit, which is currently in lay-up. The Partnership incurred a total of $1.5 million of restructuring charges under this plan. During the year ended December 31, 2017, the Partnership recognized a restructuring charge of $2.7 million , mainly relating to severance costs from the termination of the charter contract for the Arendal Spirit UMS and the resulting decommissioning of the unit. The Partnership incurred a total of $2.7 million of restructuring charges under this plan. As of December 31, 2019 and December 31, 2018 , restructuring liabilities of nil and $1.5 million , respectively, were recorded in accrued liabilities on the consolidated balance sheet.

Related Party Transactions and

Related Party Transactions and Balances	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions and Balances	Related Party Transactions and Balances a) The Partnership provides to and receives from Teekay Corporation and its wholly-owned subsidiaries certain commercial, technical, crew training, strategic, business development and/or administrative services. In addition, the Partnership reimburses its general partner for expenses incurred by the general partner that are necessary or appropriate for the conduct of the Partnership’s business. On May 8, 2019, Brookfield acquired all of Teekay Corporation's remaining interests in the Partnership, including its 49% general partner interest (providing Brookfield with 100% of the general partner ownership interest), 13.8% interest in common units, 17.3 million common unit equivalent warrants and a $25 million loan receivable outstanding (see note 11j). Effective May 8, 2019, Teekay Corporation and its wholly-owned subsidiaries were no longer related parties of the Partnership; however, the Partnership continues to provide to and receive from Teekay Corporation the services described above. Certain administrative services historically provided to the Partnership by Teekay Corporation are in the process of being transferred or have been transferred to the Partnership. The Partnership's related party transactions recognized in the consolidated statements of loss were as follows for the periods indicated: Year Ended December 31, 2019 2018 2017 Revenues (1) 42,628 117,764 49,509 Vessel operating expenses (2) (2,535 ) (6,298 ) (32,346 ) General and administrative (3) (8,811 ) (18,162 ) (31,340 ) Interest expense (4)(5)(6)(7)(8) (46,744 ) (38,695 ) (25,882 ) Losses on debt repurchases (9) — (46,041 ) — (1) Includes revenue from time-charter-out or bareboat contracts with subsidiaries of Teekay Corporation, including management fees for ship management services provided by the Partnership to a subsidiary of Teekay Corporation prior to May 8, 2019. (2) Includes ship management and crew training services provided by Teekay Corporation prior to May 8, 2019. (3) Includes commercial, technical, strategic, business development and administrative management fees charged by Teekay Corporation and reimbursements to Teekay Corporation for costs incurred on the Partnership’s behalf prior to May 8, 2019 and reimbursements to the general partner for costs incurred on the Partnership’s behalf. (4) Includes interest expense of $8.3 million for the year ended December 31, 2019 (December 31, 2018 and 2017 - $ 5.0 million and nil , respectively), incurred on the unsecured revolving credit facility provided by Brookfield and by Teekay Corporation prior to May 8, 2019 (see note 11j). (5) Includes interest expense of $38.5 million for the year ended December 31, 2019 (December 31, 2018 and 2017 - $21.0 million and nil , respectively), incurred on a portion of five-year senior unsecured bonds held by Brookfield (see note 11k). (6) Includes interest expense of $10.0 million for the year ended December 31, 2018 (December 31, 2017 - $5.3 million ), and accretion expense of $2.7 million for the year ended December 31, 2018 (December 31, 2017 - $2.2 million ), incurred on the Brookfield Promissory Note (see note 11h). (7) Includes interest expense of $14.6 million for the year ended December 31, 2017, incurred on the 2016 Teekay Corporation Promissory Note (see note 11g). (8) Includes a guarantee fee to Teekay Corporation related to the final bullet payment of the Piranema Spirit FPSO unit debt facility, which was repaid in March 2017, and a guarantee fee to Teekay Corporation related to the Partnership's liabilities associated with the long-term debt financing relating to the East Coast of Canada shuttle tanker newbuildings and certain of the Partnership's interest rate swaps and cross currency swaps until September 25, 2017 (see notes 11i and 12). (9) Includes the loss on the Partnership's prepayment of the Brookfield Promissory Note, which includes the acceleration of non-cash accretion expense of $31.5 million resulting from the difference between the $200.0 million settlement amount at its par value and its carrying value of $168.5 million , an associated early termination fee of $12.0 million paid to Brookfield and the write-off of capitalized loan costs (see note 11k). b) During the year ended December 31, 2019 , two shuttle tankers and three FSO units ( December 31, 2018 - three shuttle tankers and three FSO units, December 31, 2017 - two shuttle tankers and three FSO units) of the Partnership were employed on long-term time-charter-out or bareboat contracts with subsidiaries of Teekay Corporation. c) At December 31, 2019 , the carrying value of amounts due from related parties totaled nil ( December 31, 2018 - $59.8 million ) and the carrying value of amounts due to related parties totaled $20.0 million ( December 31, 2018 - $183.8 million ). As at December 31, 2019, the amounts due to related parties consisted only of the unsecured revolving credit facility provided by Brookfield (see note 11j). d) In December 2014, the Partnership entered into an agreement with a consortium led by Enauta Participações SA (or Enauta , formerly Queiroz Galvão Exploração e Produção SA ) to provide an FPSO unit for the Atlanta field located in the Santos Basin offshore Brazil. In connection with the contract with Enauta, the Partnership acquired the Petrojarl I FPSO unit from Teekay Corporation for a purchase price of $57 million . The Partnership received project management and engineering services from certain subsidiaries of Teekay Corporation relating to this FPSO unit upgrade. The costs for these services have been capitalized and included as part of vessels and equipment. Cumulative project management and engineering costs paid to Teekay Corporation subsidiaries up to completion of the project in 2018 were $4.5 million . e) In June 2015, the Partnership entered into 15 - year contracts, plus extension options, with a group of oil companies to provide shuttle tanker services for oil production on the East Coast of Canada. The Partnership entered into contracts to have three Suezmax Dynamic Positioning 2 (or DP2 ) shuttle tanker newbuildings constructed. These vessels replaced the existing vessels servicing the East Coast of Canada. The newbuildings delivered in late-2017 through early-2018. The Partnership received project management and engineering services from certain subsidiaries of Teekay Corporation relating to the construction of these shuttle tankers. The costs for these services have been capitalized and included as part of vessels and equipment. Project management and engineering costs paid to Teekay Corporation subsidiaries up to delivery of the final vessel in 2018 were $4.1 million . f) During 2017 and 2018, the Partnership entered into shipbuilding contracts with Samsung Heavy Industries Co., Ltd. to construct four Suezmax DP2 and two Aframax DP2 shuttle tanker newbuildings, which are expected to deliver through 2021 (see note 14c). The Partnership received project management and engineering services from certain subsidiaries of Teekay Corporation relating to the construction of these shuttle tankers. These costs are capitalized and included as part of advances on newbuilding construction contracts and are reclassified to vessels and equipment upon delivery of the vessels. Cumulative project management and engineering costs paid to Teekay Corporation subsidiaries were $1.8 million as at May 8, 2019 (December 31, 2018 - $1.1 million ). g) Effective July 1, 2016, the Partnership issued a $200.0 million promissory note to a subsidiary of Teekay Corporation (or the 2016 Teekay Corporation Promissory Note ) to re-finance existing promissory notes issued to Teekay Corporation. The 2016 Teekay Corporation Promissory Note bore interest at an annual rate of 10.00% on the outstanding principal balance, which was payable quarterly, and of which (a) 5.00% was payable in cash and (b) 5.00% was payable in common units of the Partnership, or in cash, at the election of Teekay Corporation. If the Partnership paid cash for the second 5.00% of interest, the Partnership was required to raise at least an equal amount of cash proceeds from the issuance of common units in advance of or within six months following the applicable interest payment date. The outstanding principal balance of the 2016 Teekay Corporation Promissory Note, together with accrued interest, was payable in full on January 1, 2019. On September 25, 2017, the Partnership, Brookfield and Teekay Corporation entered into an agreement to amend and restate this promissory note (see note 11h). During the year ended December 31, 2017, the Partnership incurred $14.6 million of interest expense on the 2016 Teekay Corporation Promissory Note , of which $9.6 million was paid in cash and the remainder was settled through the issuance of 1.7 million common units of the Partnership under the terms of the 2016 Teekay Corporation Promissory Note. h) Effective September 25, 2017, the Partnership, Brookfield and Teekay Corporation amended and restated the 2016 Teekay Corporation Promissory Note to create the Brookfield Promissory Note, concurrently with Brookfield’s acquisition of the 2016 Teekay Corporation Promissory Note from a subsidiary of Teekay Corporation. The Brookfield Promissory Note of $200.0 million bore interest at an annual rate of 10.00% on the outstanding principal balance, which was payable quarterly. The outstanding principal balance of the Brookfield Promissory Note, together with accrued interest, was payable in full on January 1, 2022. The Brookfield Promissory Note was recorded at its relative fair value of $163.6 million based on the allocation of net proceeds invested by Brookfield, as at September 25, 2017 (see note 16). On July 2, 2018, the Partnership repurchased the Brookfield Promissory Note (see note 11k). During the year ended December 31, 2018, the Partnership incurred $10.0 million (December 31, 2017 - $5.3 million ) of interest expense under the terms of the Brookfield Promissory Note. i) In June 2016, as part of various other financing initiatives, Teekay Corporation agreed to provide financial guarantees for the Partnership's liabilities associated with the long-term debt financing relating to the East Coast of Canada newbuilding shuttle tankers until their deliveries, and for certain of the Partnership's interest rate swaps and cross currency swaps until early-2019. The guarantees covered liabilities totaling up to a maximum amount of $495.0 million . Effective September 25, 2017, the Partnership secured the release, for fees to the applicable counterparties, of all of these financial guarantees provided by Teekay Corporation relating to the Partnership's interest rate swap, cross currency swap agreements and East Coast of Canada financing. During the year ended December 31, 2017, a guarantee fee of $5.8 million was recognized in interest expense on the Partnership's consolidated statements of loss , which represents the estimated fee a third party would charge to provide such financial guarantees. The guarantee fee was accounted for as an equity contribution by Teekay Corporation in the Partnership's consolidated statement of changes in total equity, as Teekay Corporation had provided such financial guarantees at no cost to the Partnership. j) On March 31, 2018, the Partnership entered into a credit agreement for an unsecured revolving credit facility provided by Brookfield and Teekay Corporation, which provides for borrowings of up to $125.0 million ( $100.0 million by Brookfield and $25.0 million by Teekay Corporation). On May 8, 2019, Brookfield acquired from Teekay Corporation its $25.0 million receivable of the revolving credit facility. As at December 31, 2019 , the credit facility had an undrawn balance of $105 million (December 31, 2018 - fully drawn). The interest payments on the revolving credit facility are based on LIBOR plus a margin of 5.00% per annum until March 31, 2019 and LIBOR plus a margin of 7.00% per annum for balances outstanding after March 31, 2019, with interest payable monthly. Any outstanding principal balances are due on the maturity date. During 2019, the maturity date of the revolving credit facility was extended to October 1, 2020. The revolving credit facility contains covenants that require the Partnership to maintain a minimum liquidity (cash, cash equivalents and undrawn committed revolving credit lines with at least six months to maturity) in an amount equal to the greater of $75.0 million and 5.0% of the Partnership’s total consolidated debt. As at December 31, 2019, the Partnership was in compliance with these covenants. k) On July 2, 2018, the Partnership issued, in a U.S. private placement, a total of $700.0 million of five -year senior unsecured bonds that mature in July 2023. The interest payments on the bonds are fixed at a rate 8.50% (see note 8). Brookfield purchased $500.0 million of these bonds, which included an exchange of the Brookfield Promissory Note at its par value of $200.0 million and additionally, the Partnership paid an associated $12.0 million early termination fee to Brookfield. As at December 31, 2019 , Brookfield held $423.6 million of these bonds (December 31, 2018 - $475.0 million ), which is included in long-term debt on the Partnership's consolidated balance sheet. The loss on the exchange of the Brookfield Promissory Note is included in losses on debt repurchases on the Partnership's consolidated statements of loss. l) As part of Brookfield's acquisition of 60% of the common units of the Partnership in September 2017, on January 1, 2018, the Partnership acquired a 100% ownership interest in seven subsidiaries of Teekay Corporation for cash consideration of $1.4 million . These subsidiaries provide ship management, commercial, technical, strategic, business development and administrative services to the Partnership, primarily related to the Partnership's FPSO units, shuttle tankers and FSO units.

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments The Partnership uses derivative instruments to manage certain risks in accordance with its overall risk management policies. Foreign Exchange Risk The Partnership economically hedges portions of its forecasted expenditures denominated in foreign currencies with foreign currency forward contracts. The Partnership has not designated, for accounting purposes, any of the foreign currency forward contracts held during the years ended December 31, 2019 and 2018 , as cash flow hedges. As at December 31, 2019 , the Partnership was committed to the following foreign currency forward contracts: Contract Amount Fair Value / Carrying Average Forward Rate (1) Expected Maturity 2020 (in thousands of U.S. Dollars) Norwegian Krone 457,205 518 8.87 51,567 Euro 5,000 57 0.90 5,563 575 57,130 (1) Average forward rate represents the contracted amount of foreign currency one U.S. Dollar will buy. Interest Rate Risk The Partnership enters into interest rate swaps, which exchange a receipt of floating interest for a payment of fixed interest, to reduce the Partnership’s exposure to interest rate variability on its outstanding floating-rate debt. During the years ended December 31, 2018 and 2017, certain of these interest rate swaps were designated in qualifying hedging relationships and hedge accounting was applied in the consolidated financial statements or within the Partnership's equity-accounted for investments. During 2018, the Partnership de-designated, for accounting purposes, certain interest rate swaps and since July 2, 2018, has not designated, for accounting purposes, any of its interest rate swaps as hedges of variable rate debt. Certain of the Partnership's interest rate swaps are secured by vessels. As at December 31, 2019 , the Partnership and its consolidated subsidiaries were committed to the following interest rate swap agreements: Fair Value / Carrying Weighted- Amount of Average Fixed Interest Notional Assets Remaining Interest Rate Amount (Liability) Term Rate Index $ $ (years) (%) (1) U.S. Dollar-denominated interest rate swaps (2) LIBOR 680,648 (126,630 ) 5.5 4.0 % U.S. Dollar-denominated interest rate swaps (3) LIBOR 603,071 (37,342 ) 2.4 3.2 % 1,283,719 (163,972 ) (1) Excludes the margin the Partnership pays on its variable-rate debt, which as at December 31, 2019 , ranged from 0.90% to 6.50% . (2) Notional amount remains constant over the term of the swap, unless the swap is partially terminated. (3) Principal amount reduces quarterly or semi-annually. For the periods indicated, the following tables present the effective and ineffective portion of the gain (loss) on interest rate swap agreements designated and qualifying as cash flow hedges. The following tables exclude any interest rate swap agreements designated and qualifying as cash flow hedges in the Partnership’s equity accounted joint ventures. Year Ended December 31, 2019 Year Ended December 31, 2018 Effective Portion Recognized in AOCI (1) Effective Portion Reclassified from AOCI (2) Ineffective Portion (3) Effective Portion Recognized in AOCI (1) Effective Portion Reclassified from AOCI (2) Ineffective Portion (3) — 689 — Interest expense (2,495 ) 102 — Interest expense — 689 — (2,495 ) 102 — Year Ended December 31, 2017 Effective Portion Recognized in AOCI (1) Effective Portion Reclassified from AOCI (2) Ineffective Portion (3) (19 ) (1,186 ) (7 ) Interest expense (19 ) (1,186 ) (7 ) (1) Effective portion of designated and qualifying cash flow hedges recognized in accumulated other comprehensive income (or AOCI ). (2) Effective portion of designated and qualifying cash flow hedges recorded in AOCI during the term of the hedging relationship and reclassified to earnings. (3) Ineffective portion of designated and qualifying cash flow hedges. As at December 31, 2019 , the Partnership had multiple interest rate swaps and foreign currency forward contracts governed by certain master agreements. Each of the master agreements provides for the net settlement of all derivatives subject to that master agreement through a single payment in the event of default or termination of any one derivative. The fair value of these derivatives is presented on a gross basis in the Partnership’s consolidated balance sheets. As at December 31, 2019 , these derivatives had an aggregate fair value asset amount of $1.1 million and an aggregate fair value liability amount of $118.2 million ( December 31, 2018 - an aggregate fair value asset amount of nil and an aggregate fair value liability amount of $91.1 million ). As at December 31, 2018, the Partnership had $1.2 million on deposit with the relevant counterparties as security for cross currency swap liabilities under certain master agreements. The deposit is presented in restricted cash on the consolidated balance sheet as at December 31, 2018. Tabular disclosure The following table presents the location and fair value amounts of derivative instruments, segregated by type of contract, on the Partnership’s balance sheets. Other Other Accrued Current Derivative As at December 31, 2019 Foreign currency contracts 1,123 — — (548 ) — Interest rate swaps — — (2,342 ) (18,408 ) (143,222 ) 1,123 — (2,342 ) (18,956 ) (143,222 ) As at December 31, 2018 Foreign currency contracts — — — (4,225 ) (425 ) Cross currency swaps — — (96 ) (4,442 ) — Interest rate swaps 1,028 2,075 (1,625 ) (14,623 ) (93,929 ) 1,028 2,075 (1,721 ) (23,290 ) (94,354 ) Total realized and unrealized (loss) gain of interest rate swaps and foreign currency forward contracts that are not designated for accounting purposes as cash flow hedges are recognized in earnings and reported in realized and unrealized (loss) gain on derivative instruments in the consolidated statements of loss for the years ended December 31, 2019 , 2018 and 2017 as follows: Year Ended Year Ended Year Ended Realized (loss) gain on derivative instruments Interest rate swaps (29,185 ) (38,011 ) (78,296 ) Foreign currency forward contracts (5,054 ) (1,228 ) 900 (34,239 ) (39,239 ) (77,396 ) Unrealized (loss) gain on derivative instruments Interest rate swaps (56,182 ) 56,420 33,114 Foreign currency forward contracts 5,226 (4,373 ) 1,429 (50,956 ) 52,047 34,543 Total realized and unrealized (loss) gain on derivative instruments (85,195 ) 12,808 (42,853 ) In January 2019, the Partnership settled its outstanding cross currency swaps, in connection with the repayment of certain NOK-denominated bonds, and incurred a realized loss during the year ended December 31, 2019. Realized and unrealized gain (loss) on cross currency swaps are recognized in earnings and reported in foreign currency exchange gain (loss) in the consolidated statements of loss for the years ended December 31, 2019 , 2018 and 2017 as follows: Year Ended Year Ended Year Ended Realized loss (4,177 ) (39,647 ) (84,205 ) Unrealized gain 4,442 38,648 91,914 Total realized and unrealized gain (loss) on cross currency swaps 265 (999 ) 7,709 The Partnership is exposed to credit loss in the event of non-performance by the counterparties, all of which are financial institutions, to the foreign currency forward contracts and the interest rate swap agreements. In order to minimize counterparty risk, to the extent possible and practical, interest rate swaps are entered into with different counterparties to reduce concentration risk.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The significant components of the Partnership’s deferred tax assets and liabilities are as follows: December 31, December 31, Deferred tax assets: Tax losses carried forward (1) 240,432 251,240 Other 9,348 2,887 Total deferred tax assets 249,780 254,127 Deferred tax liabilities: Vessels and equipment 20,179 17,018 Other 3,566 5,531 Total deferred tax liabilities 23,745 22,549 Net deferred tax assets 226,035 231,578 Valuation allowance (222,168 ) (224,593 ) Net deferred tax assets 3,867 6,985 Disclosed in: Deferred tax asset 7,000 9,168 Other long-term liabilities 3,133 2,183 Net deferred tax assets 3,867 6,985 (1) As at December 31, 2019 , the income tax losses carried forward of $1,021.1 million ( December 31, 2018 - $1,040.4 million ) are available to offset future taxable income in the applicable jurisdictions, of which $632.7 million can be carried forward indefinitely, $0.9 million will expire in 2020, $0.4 million will expire in 2021, $0.5 million will expire in 2022, $2.2 million will expire in 2023, $0.3 million will expire in 2024, $0.6 million will expire in 2025, $0.1 million will expire in 2026, $377.8 million will expire in 2034 and $5.6 million will expire in 2035. The components of the provision for income taxes are as follows: Year Ended Year Ended Year Ended Current (4,666 ) (4,051 ) (1,772 ) Deferred (3,161 ) (18,606 ) 1,870 Income tax (expense) recovery (7,827 ) (22,657 ) 98 The Partnership operates in countries that have differing tax laws and rates. Consequently, a consolidated weighted average tax rate will vary from year to year according to the source of earnings or losses by country and the change in applicable tax rates. Reconciliations of the tax charge related to the current year at the applicable statutory income tax rates and the actual tax charge related to the current year are as follows: Year Ended Year Ended Year Ended Net loss before taxes (343,068 ) (101,288 ) (299,540 ) Net loss not subject to taxes (418,027 ) (253,605 ) (244,045 ) Net income (loss) subject to taxes 74,959 152,317 (55,495 ) At applicable statutory tax rates 11,741 28,437 (15,784 ) Permanent differences (3,846 ) (23,179 ) 2,424 Adjustments related to currency differences (360 ) (338 ) 5,847 Valuation allowance and other 292 17,737 7,415 Tax expense (recovery) related to current year 7,827 22,657 (98 ) The following is a tabular reconciliation of the Partnership’s total amount of unrecognized tax benefits at the beginning and end of 2019 , 2018 and 2017 : Year Ended Year Ended Year Ended Balance of unrecognized tax benefits as at beginning of the year 1,596 1,410 2,174 Decreases for positions related to prior years — (189 ) (930 ) Increases for positions related to the current year — 375 166 Balance of unrecognized tax benefits as at end of the year 1,596 1,596 1,410 The Partnership does not presently anticipate such uncertain tax positions will significantly increase or decrease in the next 12 months; however, actual developments could differ from those currently expected. The tax years 2010 through 2019 remain open to examination by some of the taxing jurisdictions in which the Partnership is subject to tax. The interest and penalties on unrecognized tax benefits included in the tabular reconciliation above are not material.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies a) In August 2014, the Partnership acquired 100% of the outstanding shares of Logitel Offshore Holding AS (or Logitel ), a Norway-based company focused on high-end UMS. At the time of the transaction, affiliates of Logitel were parties to construction contracts for three UMS newbuildings ordered from the COSCO (Nantong) Shipyard (or COSCO ) in China. The Partnership took delivery of one of the UMS newbuildings, the Arendal Spirit UMS , in February 2015. In June 2016, the Partnership canceled the UMS construction contracts for the two remaining UMS newbuildings, the Stavanger Spirit and the Nantong Spirit . As a result of this cancellation, during 2016, the Partnership wrote-off $43.7 million of assets related to these newbuildings and reversed contingent liabilities of $14.5 million associated with the delivery of these assets. An estimate of the potential damages for the cancellation of the Stavanger Spirit newbuilding contract is based on the amount due for the final yard installment of approximately $170 million less the estimated fair value of the Stavanger Spirit . Given the unique design of the vessel as well as the lack of recent sale and purchase transactions for this type of asset, the value of this vessel, and thus ultimately the amount of potential damages that may result from the cancellation, is uncertain. During December 2017, Logitel Offshore Rig II Pte Ltd., the single-purpose subsidiary relating to the Stavanger Spirit, received a notice of arbitration from COSCO to arbitrate all disputes arising from the cancellation of the construction contract of the Stavanger Spirit UMS and during March 2018, COSCO commenced arbitration against Logitel Offshore Rig II Pte Ltd. and Logitel Offshore Pte. Ltd. claiming $186.2 million plus interest, damages and costs. Pursuant to the Stavanger Spirit newbuilding contract and related agreements, COSCO only has recourse to the single-purpose subsidiary that was a party to the Stavanger Spirit newbuilding contract and its immediate parent company, Logitel Offshore Pte. Ltd., for damages incurred. Logitel Offshore Rig II Pte Ltd. and Logitel Offshore Pte. Ltd. are disputing this claim. The Partnership's estimate of potential damages for the cancellation of the Nantong Spirit newbuilding contract is based upon estimates of a number of factors, including accumulated costs incurred by COSCO, sub-supplier contract cancellation costs, as well as how such costs are treated under the termination provisions in the contract. The Partnership estimates that the amount of potential damages faced by it in relation to the cancellation of the Nantong Spirit contract could range between $10 million and $40 million . Pursuant to the Nantong Spirit newbuilding contract, COSCO only has recourse to the single-purpose subsidiary that was a party to the Nantong Spirit newbuilding contract. During June 2017, Logitel Offshore Rig III LLC, the single-purpose subsidiary relating to the Nantong Spirit , received a claim from COSCO for $51.9 million for the unpaid balance for work completed, cancellation costs and damages, and during the third quarter of 2017, COSCO commenced arbitration against Logitel Offshore Rig III LLC. Logitel Offshore Rig III LLC is disputing this claim. As at December 31, 2019 , the Partnership's subsidiaries have accrued $43.3 million in the aggregate related to the above claims related to Logitel from COSCO. b) In December 2014, the Partnership acquired the Petrojarl I FPSO unit from Teekay Corporation for $57.0 million . T he Petrojarl I FPSO unit underwent upgrades at the Damen Shipyard Group’s DSR Schiedam Shipyard (or Damen ) in the Netherlands prior to being moved to the Aibel AS shipyard (or Aibel ) in Norway where its upgrades were completed. The FPSO unit commenced operations in May 2018 under a five -year charter contract with Atlanta Field B.V. and a service agreement with Enauta. During 2017, Damen commenced a formal arbitration with Petrojarl I L.L.C. (a wholly-owned subsidiary of the Partnership) as to the settlement of shipyard costs. During May 2018, the Partnership received a statement of case from Damen claiming $145.4 million for additional costs allegedly incurred by Damen in respect of the work and interest thereon. The Partnership served its defense to these claims on October 31, 2018 disputing the claims brought by Damen and bringing counterclaims against Damen (including a claim for abatement of the contract price) in excess of $110 million . In December 2019, arbitration hearings commenced. As of December 31, 2019 , the Partnership had not accrued for any potential liability relating to these claims as the Partnership's best estimate is that the arbitration will not result in a net award, which would require an amount to be paid to Damen in excess of amounts already paid as at December 31, 2019 . c) In 2017, the Partnership entered into shipbuilding contracts with Samsung Heavy Industries Co., Ltd. to construct four Suezmax DP2 shuttle tanker newbuildings, for an estimated aggregate fully built-up cost of $588.7 million , excluding approximately $16 million of subsidies expected to be received by the Partnership. These newbuilding vessels are being constructed based on the Partnership's new Shuttle Spirit design which incorporates technologies intended to increase fuel efficiency and reduce emissions, including liquefied natural gas (or LNG ) propulsion technology. Upon expected delivery in 2020, these vessels are to provide shuttle tanker services in the North Sea, with two to operate under the Partnership’s existing master agreement with Equinor, and two to operate directly within the North Sea CoA fleet. As at December 31, 2019 , gross payments made towards these commitments were $221.1 million and the remaining gross payments required to be made are estimated to be $367.6 million ( 2020 ). In April 2019, the Partnership secured a $413.8 million debt facility, which as at December 31, 2019, provided borrowings of $198.1 million for the newbuilding payments and was fully drawn (see note 8). In July 2018, the Partnership entered into shipbuilding contracts with Samsung Heavy Industries Co. Ltd., to construct two Aframax DP2 shuttle tanker newbuildings, for an estimated aggregate fully built-up cost of $257.1 million , excluding approximately $2 million of subsidies expected to be received by the Partnership. These newbuilding vessels are also being constructed based on the Partnership's new Shuttle Spirit design. Upon delivery in late-2020 through early-2021, these vessels will join the Partnership's CoA portfolio in the North Sea. As at December 31, 2019 , gross payments made towards these commitment s were $53.2 million and the remaining gross payments required to be made are estimated to be $129.5 million (2020) and $74.4 million (2021). In September 2019, the Partnership secured $214.2 million of long-term financing under sale-leaseback transactions, which as at December 31, 2019 , provided pre-delivery borrowings of $23.8 million for the newbuilding payments and was fully drawn. The financing is classified as Other current liabilities and Other long-term liabilities on the Partnership's consolidated balance sheet and accrues interest at a fixed rate of 5.5% until the related vessels deliver. In August 2019, the Partnership entered into a shipbuilding contract with Samsung Heavy Industries Co. Ltd., to construct one Suezmax DP2 shuttle tanker newbuilding, for an estimated aggregate fully built-up cost of $128.2 million . Upon delivery in early-2022, the vessel will operate under existing contracts with a group of oil companies on the East Coast of Canada. As at December 31, 2019, gross payments made towards this commitment were $7.2 million and the remaining gross payments required to be made are estimated to be $21.2 million (2020), $26.7 million (2021) and $73.1 million (2022). The Partnership expects to secure long-term financing related to this shuttle tanker newbuilding. d) During 2019, certain entities and individuals, which together claim to hold approximately 5,000,000 of the Partnership’s common units, filed complaints in the United States District Court for the Southern District of New York naming as defendants the Partnership, the general partner, current and former members of the board of directors of the general partner, certain senior management of the Partnership, Brookfield and Brookfield Asset Management Inc. In October 2019, a joint stipulation was filed by the plaintiffs to consolidate the separate complaints. The plaintiffs purported to assert claims on behalf of a class of holders of the Partnership’s common units in relation to Brookfield’s unsolicited non-binding proposal, made in May 2019, pursuant to which Brookfield would acquire all of the Partnership’s issued and outstanding common units that Brookfield did not already own in exchange for $1.05 in cash per common unit. On October 1, 2019, the Partnership entered into an agreement with Brookfield to acquire by merger all of the outstanding publicly held common units not already held by Brookfield in exchange for $1.55 in cash per common unit (or, as an alternative, other equity consideration) and on January 22, 2020, Brookfield completed the merger of all of the outstanding publicly held and listed common units representing the Partnership's limited partner interests held by parties other than Brookfield. (see note 16). On January 28, 2020 the same plaintiffs filed an Amended Consolidated Class Action Complaint in which the plaintiffs purport to allege further claims in respect of the merger process and the ultimate agreed consideration of $1.55 in cash per common unit or alternative equity consideration. The complaints allege a breach of the Partnership’s limited partnership agreement and, in the alternative, a breach of an implied covenant of good faith and fair dealing. The complaints seek damages in an unspecified amount and an award to the plaintiffs of their costs and expenses incurred in the action, including their attorneys’ fees. The Partnership believes that there is no merit to these claims. e) Despite generating $319.9 million of cash flows from operating activities during 2019, the Partnership had a working capital deficit of $184.5 million as at December 31, 2019. This working capital deficit primarily relates to the scheduled maturities and repayments of $353.2 million of outstanding debt during the 12 months ending December 31, 2020, which amount was classified as current as at December 31, 2019 . The Partnership also anticipates making payments related to commitments to fund vessels under construction during 2020 through 2022 of $693 million . Based on these factors, during the one-year period following the issuance of these consolidated financial statements, the Partnership will need to obtain additional sources of financing, in addition to amounts generated from operations, to meet its obligations and commitments and minimum liquidity requirements under its financial covenants. Additional potential sources of financing include refinancing or extension of debt facilities and extensions and redeployments of existing assets. The Partnership is actively pursuing the funding alternatives described above, which it considers probable of completion based on the Partnership’s history of being able to raise debt and refinance loan facilities for similar types of vessels. The Partnership is in various stages of completion on these matters. Based on the Partnership’s liquidity at the date these consolidated financial statements were issued, the liquidity it expects to generate from operations over the following year, and by incorporating the Partnership’s plans to raise additional liquidity that it considers probable of completion, the Partnership expects that it will have sufficient liquidity to enable the Partnership to continue as a going concern for at least the one-year period following the issuance of these consolidated financial statements.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2019
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information a) The following is a tabular reconciliation of the Partnership's cash, cash equivalents and restricted cash balances for the periods presented in these consolidated financial statements: As at As at As at 2019 2018 2017 $ $ $ Cash and cash equivalents 199,388 225,040 221,934 Restricted cash (1) 17,798 8,540 28,360 Restricted cash - long-term (1) 89,070 — — 306,256 233,580 250,294 (1) Restricted cash as at December 31, 2019 includes funds held as a guarantee for certain operating expenses, funds for scheduled loan facility repayments, withholding taxes and office lease prepayments. Restricted cash - long-term as at December 31, 2019 includes amounts held in escrow for a shuttle tanker newbuilding yard installment payment. Restricted cash as at December 31, 2018 includes amounts held in escrow as collateral on the Partnership's cross currency swaps, funds for a scheduled loan facility repayment, withholding taxes and office lease prepayments. Restricted cash as at December 31, 2017 includes amounts held in escrow as collateral on the Partnership’s cross currency swaps and funds for certain vessel upgrade costs. b) The changes in non-cash working capital items related to operating activities for the years ended December 31, 2019 , 2018 and 2017 are as follows: Year Ended Year Ended Year Ended Accounts receivable (57,957 ) 22,320 (54,830 ) Prepaid expenses and other assets 1,115 (2,104 ) (6,618 ) Accounts payable and accrued liabilities 68,219 (32,800 ) 43,113 Due from (to) related parties 1,039 (70,643 ) 51,841 12,416 (83,227 ) 33,506 c) Cash interest paid (including realized losses on interest rate swaps) during the years ended December 31, 2019 , 2018 and 2017 totaled $217.8 million , $204.5 million and $205.0 million , respectively. d) Income taxes paid during the years ended December 31, 2019 , 2018 and 2017 totaled $4.9 million , $2.1 million and $2.2 million , respectively.

Total Capital and Net Income Pe

Total Capital and Net Income Per Common Unit	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Total Capital and Net Income Per Common Unit	Total Capital and Net Loss Per Common Unit At December 31, 2019 , a total of 26.9% of the Partnership’s common units outstanding were held by the public. Brookfield held the remaining 73.1% of the common units of the Partnership and 100% of the general partner interest. At December 31, 2019 , all of the Partnership’s outstanding Series A Cumulative Redeemable Preferred Units (or the Series A Preferred Units ), Series B Cumulative Redeemable Preferred Units (or the Series B Preferred Units ) and Series E Fixed-to-Floating Rate Cumulative Redeemable Perpetual Preferred Units (or the Series E Preferred Units) were held by entities other than Brookfield and its affiliates. On October 1, 2019, the Partnership announced that it entered into an agreement and plan of merger (or the Merger Agreement ) with Brookfield, and on January 22, 2020, Brookfield completed its acquisition by merger (or the Merger ) of all of the outstanding publicly held and listed common units representing the Partnership's limited partner interests held by parties other than Brookfield (or unaffiliated unitholders ) pursuant to the Merger Agreement among the Partnership, the general partner and certain members of Brookfield . Under the terms of the Merger Agreement, a newly formed subsidiary of Brookfield merged with and into the Partnership, with the Partnership surviving as a wholly owned subsidiary of Brookfield and the Partnership's general partner, and common units held by unaffiliated unitholders were converted into the right to receive $1.55 in cash per common unit (or the cash consideration ), other than common units held by unaffiliated unitholders who elected to receive the equity consideration (as defined below). As an alternative to receiving the cash consideration, each unaffiliated unitholder had the option to elect to forego the cash consideration and instead receive one of the Partnership's newly designated unlisted Class A Common Unit per common unit (or the equity consideration ). The Class A Common Units are economically equivalent to the common units held by Brookfield following the Merger, but have limited voting rights and limited transferability. As a result of the Merger, Brookfield owns 100% of the Class B Common Units, representing approximately 98.7% of the Partnership's outstanding common units. All of the Class A Common Units, representing approximately 1.3% of our outstanding common units as of the closing of the Merger, are held by the unaffiliated unitholders who elected to receive the equity consideration in respect of their common units. Pursuant to the terms of the Merger Agreement, the Partnership's outstanding preferred units were unchanged and remain outstanding following the Merger. Limited Partners’ Rights Significant rights of the limited partners include the following: • Right of common unitholders to receive distributions of Available Cash (after deducting expenses, including estimated maintenance capital expenditures and reserves, including reserves for future capital expenditures and for anticipated future credit needs of the Partnership) within approximately 45 days after the end of each quarter. • No limited partner shall have any management power over the Partnership’s business and affairs; the general partner shall conduct, direct and manage our activities. • The general partner may be removed if such removal is approved by common unitholders holding at least 66.66% of the outstanding units voting as a single class, including units held by the general partner and its affiliates. Incentive Distribution Rights Prior to the Merger, when the Partnership’s incentive distribution rights were canceled and ceased to exist, t he general partner was entitled to certain incentive distributions if the amount the Partnership distributed to common unitholders with respect to any quarter exceeded specified target levels shown below: Quarterly Distribution Target Amount (per unit) Unitholders General Partner Minimum quarterly distribution of $0.35 99.24 % 0.76 % Up to $0.4025 99.24 % 0.76 % Above $0.4025 up to $0.4375 86.24 % 13.76 % Above $0.4375 up to $0.525 76.24 % 23.76 % Above $0.525 51.24 % 48.76 % During 2019 , 2018 and 2017 cash distributions were below $0.35 per common unit. Consequently, the increasing percentages were not used to calculate the general partner’s interest in net loss for the purposes of the net loss per common unit calculation for the years ended December 31, 2019 , 2018 and 2017 . In the event of a liquidation, all property and cash in excess of that required to discharge all liabilities and liquidation amounts on the Series A, Series B and Series E Preferred Units will be distributed to the common unitholders and the general partner in proportion to their capital account balances, as adjusted to reflect any gain or loss upon the sale or other disposition of the Partnership’s assets in liquidation in accordance with the partnership agreement. Series A, B and E Preferred Units In April 2013, the Partnership issued 6.0 million 7.25% Series A Preferred Units in a public offering with an aggregate redemption amount of $150.0 million , for net proceeds of $144.8 million . Pursuant to the partnership agreement, distributions on the Series A Preferred Units to preferred unitholders are cumulative from the date of original issue and are payable quarterly in arrears, when, as and if declared by the board of directors of the general partner. At any time on or after April 30, 2018, the Series A Preferred Units may be redeemed by the Partnership at a redemption price of $25.00 per unit plus an amount equal to all accumulated and unpaid distributions to the date of redemption. These units are listed on the New York Stock Exchange. In April 2015, the Partnership issued 5.0 million 8.50% Series B Preferred Units in a public offering with an aggregate redemption amount of $125.0 million , for net proceeds of $120.8 million . Pursuant to the partnership agreement, distributions on the Series B Preferred Units to preferred unitholders are cumulative from the date of original issue and are payable quarterly in arrears, when, as and if declared by the board of directors of the general partner. At any time on or after April 20, 2020, the Series B Preferred Units may be redeemed by the Partnership at a redemption price of $25.00 per unit plus an amount equal to all accumulated and unpaid distributions to the date of redemption. These units are listed on the New York Stock Exchange. In January 2018, the Partnership issued 4.8 million 8.875% Series E Preferred Units in a public offering for net proceeds of $116.0 million . Pursuant to the partnership agreement, distributions on the Series E Preferred Units to preferred unitholders are cumulative from the date of original issue, payable quarterly in arrears, when, as and if declared by the board of directors of the general partner. Distributions are payable on the Series E Preferred Units (i) from and including the original issue date to, but excluding, February 15, 2025 at a fixed rate equal to 8.875% per annum of the stated liquidation preference of $25.00 per unit and (ii) from and including February 15, 2025, at a floating rate equal to three-month LIBOR plus 6.407% . These units are listed on the New York Stock Exchange. Series C-1 and Series D Preferred Units In September 2017, the Partnership entered into a strategic partnership (or the Brookfield Transaction ) with Brookfield. As part of this transaction, the Partnership repurchased and subsequently canceled all of its outstanding Series C-1 Cumulative Convertible Perpetual Preferred Units (or the Series C-1 Preferred Units ) and Series D Cumulative Convertible Perpetual Preferred (or the Series D Preferred Units ) from existing unitholders. The Series C-1 and Series D Preferred Units, similar to the Partnership’s previously outstanding Series C Preferred Units, were convertible into common units in accordance with their terms. The Series C-1 Preferred Units were repurchased for $18.20 per unit and Series D Preferred Units for $23.75 per unit, for a total cash payment of $260.2 million , which included $10.2 million of accrued and unpaid quarterly distributions, and resulted in a net accounting gain on repurchase of approximately $20.0 million , which was reflected as an equity contribution. Consideration for the repurchase of the Series D Preferred Units also included a reduction in the exercise price, from $6.05 to $4.55 per unit, of 2,250,000 of one of two tranches of warrants issued in conjunction with the Series D Preferred Units in June 2016. As at December 31, 2019, 2018 and 2017, 6,750,000 warrants originally issued in connection with the Series D Preferred Units with an exercise price of $4.55 remained outstanding. Series D Detachable Warrants and Brookfield Transaction Warrants Series D Detachable Warrants In June 2016, the Partnership issued a total of 4.0 million of its 10.5% Series D Preferred Units to a group of investors and subsidiaries of Teekay Corporation. These investors and Teekay Corporation also received an aggregate of 4,500,000 warrants with an exercise price of $4.55 per unit (the $4.55 Warrants ) and an aggregate of 2,250,000 warrants with an exercise price of $6.05 per unit (the $6.05 Warrants ) (collectively, the Warrants ). In September 2017, the exercise price of the $6.05 warrants was reduced to $4.55 per unit, as described above. As at December 31, 2019 , the Warrants had a seven-year term and were exercisable any time after six months following their issuance date. The Warrants could be settled either in cash or common units at the Partnership’s option. The Warrants were recorded as permanent equity in the Partnership's consolidated balance sheets with 6,750,000 Warrants outstanding at December 31, 2019 (December 31, 2018 and 2017 - 6,750,000 ). On January 22, 2020, Brookfield completed the Merger of all of the outstanding publicly held and listed common units representing the Partnership's limited partner interests held by parties other than Brookfield. As a result of this transaction, and the fact that the exercise price of each of the outstanding Warrants exceeded the cash consideration of $1.55 per common unit, each of the Warrants was automatically canceled and ceased to exist. No consideration was delivered in respect thereof. Brookfield Transaction Warrants and Common Units Issued In September 2017, as part of the Brookfield Transaction, Brookfield and Teekay Corporation invested $610.0 million and $30.0 million , respectively, in the Partnership in exchange for 244.0 million and 12.0 million common units, respectively, at a price of $2.50 per common unit , and the Partnership issued to Brookfield and Teekay Corporation 62.4 million and 3.1 million warrants, respectively (the Brookfield Transaction Warrants ) , with each warrant exercisable for one common unit . As part of the amended and restated Brookfield Promissory Note transaction (see note 11h ), Brookfield concurrently transferred 11.4 million Brookfield Transaction Warrants and $140.0 million to Teekay Corporation to acquire a $200 million subordinated promissory note owed by the Partnership. The $637.0 million net investment in the Partnership by Brookfield and Teekay Corporation was allocated on a relative fair value basis between the 256 million common units issued to Brookfield and Teekay Corporation ( $512.6 million ), the Brookfield Transaction Warrants ( $121.3 million ), the effective extinguishment of the $200 million 2016 Teekay Corporation Promissory Note ( ($160.5) million ) and the concurrent issuance to Brookfield of the $200 million Brookfield Promissory Note ( $163.6 million ) (see note 11h )). The $39.5 million gain on the effective extinguishment of the subordinated promissory note was accounted for as a contribution of capital from Teekay Corporation. On July 2, 2018, the Partnership repurchased the Brookfield Promissory Note (see note 11j). The Brookfield Transaction Warrants entitled the holders to acquire one common unit for each Brookfield Transaction Warrant for an exercise price of $0.01 per common unit, which was exercisable until September 25, 2024 if the Partnership's common unit volume-weighted average price was equal to or greater than $4.00 per common unit for 10 consecutive trading days. In July 2018, Brookfield, through an affiliate, exercised its option to acquire an additional 2% of ownership interests in the Partnership's general partner from an affiliate of Teekay Corporation in exchange for 1.0 million Brookfield Transaction Warrants. In May 2019, Brookfield acquired all of Teekay Corporation's remaining interests in the Partnership, including its 49% general partner interest (providing Brookfield with 100% of the general partner ownership interest), 13.8% interest in common units, 17.3 million common unit equivalent warrants and a $25.0 million loan receivable outstanding. As at December 31, 2019 , Brookfield and Teekay Corporation held 65.5 million and nil Brookfield Transaction Warrants, respectively (2018 - 50.0 million and 15.5 million , 2017 - 51.0 million and 14.5 million ). On January 22, 2020, Brookfield completed the Merger of all of the outstanding publicly held and listed common units representing the Partnership's limited partner interests held by parties other than Brookfield. As a result of this transaction, and the fact that the exercise price of each of the outstanding Brookfield Transaction Warrants exceeded the cash consideration of $1.55 per common unit, each of the Brookfield Transaction Warrants was automatically canceled and ceased to exist. No consideration was delivered in respect thereof. Net Loss Per Common Unit Year Ended December 31, December 31, December 31, Limited partners' interest in net loss (378,770 ) (147,141 ) (339,501 ) Preferred units - periodic accretion — — (2,380 ) Net gain on repurchase of Series C-1 and Series D Preferred Units — — 19,637 Gain on modification of warrants — — 1,495 Limited partners' interest in net loss for basic net loss per common unit (378,770 ) (147,141 ) (320,749 ) Series C-1 Preferred Units - cash distributions — — 12,650 Gain on repurchase of Series C-1 Preferred Units — — (26,994 ) Limited partners' interest in diluted net loss (378,770 ) (147,141 ) (335,093 ) Weighted average number of common units 410,727,035 410,261,239 220,755,937 Dilutive effect of Series C-1 Preferred Units and unit based compensation — — 9,184,183 Common units and common unit equivalents 410,727,035 410,261,239 229,940,120 Limited partner's interest in net loss per common unit - basic (0.92 ) (0.36 ) (1.45 ) - diluted (0.92 ) (0.36 ) (1.46 ) Limited partners’ interest in net loss per common unit – basic is determined by dividing net loss , after deducting the amount of net loss attributable to the non-controlling interests, the general partner’s interest, the distributions on the Series A, B, and E Preferred Units and for periods prior to their exchange or repurchase, the Series C-1 and D Preferred Units, the periodic accretion prior to the repurchase of the Series D Preferred Units, the net gain on the repurchase of the Series C-1 and D Preferred Units and gain on the modification of warrants, by the weighted-average number of common units outstanding during the period. The distributions payable or paid on the preferred units for the year ended December 31, 2019 were $32.2 million ( 2018 - $31.5 million , 2017 - $42.1 million ). The computation of limited partners’ interest in net income per common unit - diluted assumes the issuance of common units for all potential dilutive securities, consisting of restricted units (see note 17 ), warrants and, and for periods prior to their exchange or repurchase, Series C-1 and D Preferred Units. Consequently, for periods prior to their repurchase, the net income attributable to limited partners’ interest is exclusive of any distributions on the Series C-1 and D Preferred Units, the prior periodic accretion of the Series D Preferred Units, the net gain on the repurchase of preferred units, and the gain on the modification of warrants. In addition, the weighted average number of common units outstanding has been increased assuming conversion of the restricted units and exercise of the warrants using the treasury stock method and, for periods prior to the exchange or repurchase, the Series C-1 and D Preferred Units having been converted to common units using the if-converted method. The computation of limited partners’ interest in net income per common unit - diluted does not assume the issuance of common units pursuant to the restricted units, warrants and, for periods prior to their exchange or repurchase, Series C-1 and D Preferred Units if the effect would be anti-dilutive. In periods where a loss is attributable to common unitholders all restricted units, warrants, the Series C-1 and D Preferred Units (for applicable periods) could have been anti-dilutive. In periods where income is allocated to common unitholders, the Series C-1 and D Preferred Units could have been anti-dilutive for periods prior to their exchange or repurchase. For the year ended December 31, 2019 , a total common unit equivalent of 72.3 million warrants and 0.5 million restricted units were excluded from the computation of limited partners' interest in net loss per common unit - diluted, as their effect was anti-dilutive. For the year ended December 31, 2018, a total common unit equivalent of 72.3 million warrants and 0.1 million restricted units were excluded from the computation of limited partners’ interest in net loss per common unit - diluted, as their effect was anti-dilutive. For the year ended December 31, 2017, 31.9 million common unit equivalent Series D Preferred Units, 72.3 million common unit equivalent warrants and 0.4 million restricted units were excluded from the computation of limited partners’ interest in net loss per common unit - diluted, as their effect was anti-dilutive. The general partner’s and common unitholders’ interests in net loss are calculated as if all net loss was distributed according to the terms of the Partnership’s partnership agreement, regardless of whether those earnings would or could be distributed. The partnership agreement does not provide for the distribution of net loss ; rather, it provides for the distribution of available cash, which is a contractually defined term that generally means all cash on hand at the end of each quarter less, among other things, the amount of cash reserves established by the general partner’s board of directors to provide for the proper conduct of the Partnership’s business including reserves for maintenance and replacement capital expenditure, anticipated capital requirements and any accumulated distributions on, or redemptions of, the Series A, Series B and Series E Preferred Units, and for periods prior to their exchange or repurchase, the Series C-1 and D Preferred Units. Unlike available cash, net loss is affected by non-cash items such as depreciation and amortization, unrealized gain or loss on derivative instruments and unrealized foreign currency translation gain or loss. Pursuant to the partnership agreement, allocations to partners are made on a quarterly basis. Public and Private Offerings of Common Units The following table summarizes the issuances of common units over the three years ending December 31, 2019 : Date Offering Type Number of Common Units Issued Offering Price Gross Proceeds (i) Net Proceeds Use of Proceeds (in millions of U.S. Dollars) During 2017 Payment-in-kind 6,391,087 (ii) 29.8 29.8 (ii) September 2017 Private 256,000,000 (iii) 640.0 628.1 To strengthen the Partnership's capital structure and to fund the Partnership's existing growth projects. (i) Including the General Partner’s proportionate capital contribution, where applicable. (ii) Common units issued as a payment-in-kind for the distributions on the Partnership's Series C-1 and D Preferred Units and on the Partnership's common units and general partner interest held by subsidiaries of Teekay Corporation and payment-in-kind for interest on the 2016 Teekay Corporation Promissory Note (see note 11g). (iii) In September 2017, as part of the Brookfield Transaction, the Partnership issued to Brookfield 244.0 million common units and the Brookfield Transaction Warrants to purchase 62.4 million common units, for gross proceeds of $610.0 million . In addition, the Partnership issued to Teekay Corporation 12.0 million common units and the Brookfield Transaction Warrants to purchase 3.1 million common units, for gross proceeds of $30.0 million . The net proceeds are exclusive of expenses allocated to the Brookfield Transaction Warrants of $1.4 million .

Unit Based Compensation

Unit Based Compensation	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Unit Based Compensation	Unit Based Compensation During the year ended December 31, 2019 , a total of 561,420 common units, with an aggregate value of $0.7 million , were granted to the non-management directors of the general partner as part of their annual compensation for 2019 . The Partnership grants restricted unit-based compensation awards as incentive-based compensation to certain employees of the Partnership and Teekay Corporation’s subsidiaries that provide services to the Partnership. During the years ended December 31, 2019 , 2018 and 2017 , the Partnership granted restricted unit-based compensation awards with respect to 2,577,626 , 1,424,058 and 321,318 units, respectively, with aggregate grant date fair values of $3.0 million , $3.7 million and $1.6 million , respectively for 2019 , 2018 and 2017 , based on the Partnership’s closing unit price on the grant dates. Each restricted unit is equal in value to one of the Partnership’s common units. Each award represents the specified number of the Partnership’s common units plus reinvested distributions from the grant date to the vesting date. The awards vest equally over three years from the grant date. Any portion of an award that is not vested on the date of a recipient’s termination of service is canceled, unless the termination arises as a result of the recipient’s retirement and, in this case, the award will continue to vest in accordance with the vesting schedule. Upon vesting, the awards are paid to each grantee in the form of common units or cash. As at December 31, 2019 , 2018 and 2017 , the Partnership had 3,764,261 , 1,456,999 and 480,301 non-vested restricted units outstanding, respectively. During the year ended December 31, 2019 , restricted unit-based awards with respect to a total of 460,689 common units with a fair value of $1.6 million , based on the Partnership’s closing unit price on the grant date, vested and the amount paid to the grantees was made by issuing 116,282 common units and by paying $0.3 million in cash. During the year ended December 31, 2018 , restricted unit-based awards with respect to a total of 342,560 common units with a fair value of $2.0 million , based on the Partnership’s closing unit price on the grant date, vested and the amount paid to the grantees was made by issuing 111,336 common units and by paying $0.4 million in cash. During the year ended December 31, 2017 , restricted unit-based awards with respect to a total of 255,370 common units with a fair value of $2.2 million , based on the Partnership’s closing unit price on the grant date, vested and the amount paid to the grantees was made by issuing 83,060 common units and by paying $0.6 million in cash. The Partnership recorded unit-based compensation expense of $2.6 million , $1.4 million and $0.9 million , during the years ended December 31, 2019 , 2018 and 2017 , respectively, in general and administrative expenses in the Partnership’s consolidated statements of loss . As of December 31, 2019 and December 31, 2018 , liabilities relating to cash settled restricted unit-based compensation awards of $2.4 million and $0.7 million , respectively, were recorded in accrued liabilities on the Partnership’s consolidated balance sheets. As at December 31, 2019 , the Partnership had $3.2 million of non-vested awards not yet recognized, which the Partnership expects to recognize over a weighted average period of 1.1 years .

(Write-down) and Gain on Sale o

(Write-down) and Gain on Sale of Vessels	12 Months Ended
	Dec. 31, 2019
Discontinued Operations and Disposal Groups [Abstract]
(Write-down) and Gain on Sale of Vessels	(Write-down) and Gain on Sale of Vessels In 2019, the carrying value of one FPSO unit and the Arendal Spirit UMS were written down to their estimated fair value, using a discounted cash flow valuation, as a result of a reassessment of the future redeployment assumptions for both units. The Partnership's consolidated statement of loss for the year ended December 31, 2019 includes a $338.0 million write-down related to these units. The write-downs of the one FPSO unit and Arendal Spirit UMS are included in the Partnership's FPSO and UMS segments, respectively. In 2019, the carrying value of the Ostras FPSO unit was written down to its estimated fair value, using an appraised value, due to the expected sale of the unit. The Ostras FPSO unit was classified as held for sale on the Partnership's consolidated balance sheet as at December 31, 2019. The Partnership's consolidated statement of loss for the year ended December 31, 2019 includes a $4.4 million write-down related to this vessel. The write-down is included in the Partnership's FPSO segment. In 2019, the carrying value of the Navion Hispania and Stena Sirita shuttle tankers were written down to their estimated fair values, using appraised values, as a result of the expected sales of the vessels. These vessels were classified as held for sale on the Partnership's consolidated balance sheet as at December 31, 2019. The Partnership's consolidated statement of loss for year ended December 31, 2019 includes a $2.3 million write-down related to these vessels. The write-down is included in the Partnership's shuttle tanker segment. In 2019, the Partnership sold a 1988-built FSO unit, the Pattani Spirit, for net proceeds of $15.7 million . The Pattani Spirit was classified as held for sale on the Partnership's consolidated balance sheet as at December 31, 2018. The Partnership's consolidated statement of loss for the year ended December 31, 2019 includes a $11.2 million gain related to the sale of this vessel. The gain on sale is included in the Partnership's FSO segment. In 2019, the Partnership sold a 2001-built shuttle tanker, the Nordic Spirit, and a 1998-built shuttle tanker, the Alexita Spirit, for net proceeds of $8.9 million and $8.7 million , respectively. The Nordic Spirit was classified as held for sale on the Partnership's consolidated balance sheet as at December 31, 2018. The Partnership's consolidated statement of loss for the year ended December 31, 2019 includes a $1.3 million gain related to the sale of these vessels. The gain on sale is included in the Partnership's shuttle tanker segment. In 2018, the carrying value of the Ostras and Piranema Spirit FPSO units were written down to their estimated fair values, using a discounted cash flow valuation, as a result of a reassessment of the future redeployment assumptions for both units. The Partnership's consolidated statement of loss for the year ended December 31, 2018 includes a $180.2 million write-down related to these vessels. The write-down is included in the Partnership's FPSO segment. In 2018, the carrying value of the HiLoad DP unit was written down to nil using a discounted cash flow valuation. The unit was written down as a result of a settlement received from Petrobras (see note 5 ) and a change in the operating plan for the unit. The Partnership's consolidated statement of loss for the year ended December 31, 2018 includes a $19.2 million write-down related to this unit. The HiLoad DP unit had previously been written down to its estimated fair value using a discounted cash flow valuation in 2017, as a result of a change in expectations for the future employment opportunities for the unit and the unit proceeding into lay-up. The Partnership's consolidated statement of loss for the year ended December 31, 2017 includes a $26.3 million write-down related to this unit. The write-downs are included in the Partnership's shuttle tanker segment. In 2018, the carrying value of the Nordic Spirit and Stena Spirit shuttle tankers were written down to their estimated fair values, using appraised values, due to the redelivery of these vessels from their charterer after completing their bareboat charter contracts in May 2018 and the resulting change in the expectations for the future opportunities for the vessels. The Partnership's consolidated statement of loss for the year ended December 31, 2018 includes a $29.7 million write-down related to these vessels, of which $14.8 million is included in a 50% -owned subsidiary of the Partnership. The write-down is included in the Partnership's shuttle tanker segment. In 2018, the Partnership sold the 1998-built shuttle tankers, the Navion Scandia and Navion Britannia, for net proceeds of $10.8 million and $10.4 million , respectively. The Partnership's consolidated statement of loss for the year ended December 31, 2018 includes a $5.3 million gain related to the sale of these vessels. The gain on sale is included in the Partnership's shuttle tanker segment. In 2017, the carrying value of two FPSO units were written down to their estimated fair value, using a discounted cash flow valuation. The Petrojarl I FPSO unit was written down to its estimated fair value, as a result of increasing costs associated with additional upgrade work required and estimated liquidated damages to the charterer associated with the delay in the commencement of the unit's operations. During 2017, the Petrojarl I FPSO unit was moved from the Damen Shipyard in the Netherlands to complete upgrades at the Aibel AS shipyard in Norway. Upon arrival at the Aibel AS shipyard, it was determined that additional upgrade work was required, resulting in a further increase in costs and a further delay of the commencement of the FPSO unit's operations until the second quarter of 2018. In addition, during 2017, the Ostras FPSO unit was written down to its estimated fair value, using a discounted cash flow valuation, as a result of an expected change in the operating plans for the unit resulting from receiving confirmation from the charterer that it planned to redeliver the unit upon completion of the firm charter contract in January 2018. The Partnership's consolidated statement of loss for the year ended December 31, 2017 includes an aggregate $265.2 million write-down related to these units. The write-downs are included in the Partnership's FPSO segment. In 2017, the Nordic Brasilia and Nordic Rio shuttle tankers were written down to their estimated fair values, using appraised values, due to the redelivery of these vessels from their charterer after completing their bareboat charter contracts in 2017 and a resulting change in expectations for the future opportunities and operating plans for the vessels. The Partnership's consolidated statement of loss for the year ended December 31, 2017 includes a $25.2 million write-down related to these vessels, of which $10.8 million is included in a 50% -owned subsidiary of the Partnership. The write-downs are included in the Partnership's shuttle tanker segment. In 2017, the Partnership sold a 1999-built shuttle tanker, the Navion Marita, for gross proceeds of $5.7 million , which was the approximate carrying value of the vessel at the time of sale. The shuttle tanker had previously been written down to its estimated fair value as a result of the expected sale of the vessel, and the Partnership’s consolidated statement of loss for the year ended December 31, 2017, includes a $5.1 million write-down related to the vessel. The write-down is included in the Partnership’s shuttle tanker segment.

Investment in Equity Accounted

Investment in Equity Accounted Joint Ventures	12 Months Ended
	Dec. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Investment in Equity Accounted Joint Ventures	Investment in Equity Accounted Joint Ventures In October 2014, the Partnership sold a 1995-built shuttle tanker, the Navion Norvegia , to OOG-TK Libra GmbH & Co KG (or Libra Joint Venture ), a 50 / 50 joint venture of the Partnership and Ocyan S.A. (or Ocyan) which vessel was converted to a new FPSO unit for the Libra field in Brazil. The FPSO unit commenced operations in late-2017. Included in the joint venture is a ten -year plus construction period loan facility, which as at December 31, 2019 had an outstanding balance of $586.5 million (December 31, 2018 - $654.2 million ). The interest payments of the loan facility are based on LIBOR, plus a margin of 2.65% . The final payment under the loan facility is due October 2027. In addition, the Libra Joint Venture entered into ten -year interest rate swap agreements, with an aggregate notional amount of $536.1 million as at December 31, 2019 (December 31, 2018 - $588.8 million ), which amortize quarterly over the term of the interest rate swap agreements. These interest rate swap agreements exchange the receipt of LIBOR-based interest for the payment of a weighted average fixed rate of 2.52% . These interest rate swap agreements are not designated in qualifying cash flow hedging relationships for accounting purposes. In June 2013, the Partnership acquired Teekay Corporation’s 50% interest in OOG TKP FPSO GmbH & Co KG, a joint venture with Ocyan, which owns the Itajai FPSO unit. Included in the joint venture is an eight -year loan facility, which as at December 31, 2019 had an outstanding balance of $105.9 million (December 31, 2018 - $138.2 million ). The interest payments of the loan facility are based on LIBOR, plus a margin of 2.45% . The final payment under the loan facility is due October 2021. In addition, the joint venture entered into ten -year and nine -year interest rate swap agreements with an aggregate notional amount of $105.9 million as at December 31, 2019 (December 31, 2018 - $123.4 million ), which amortize semi-annually over the term of the interest rate swap agreements. These interest rate swap agreements exchange the receipt of LIBOR-based interest for the payment of a weighted average fixed rate of 2.50% . These interest rate swap agreements are not designated in qualifying cash flow hedging relationships for accounting purposes. As at December 31, 2019 a nd 2018 , the Part nership had total investments of $234.6 million and $212.2 million , respectively, in equity accounted joint ventures. No indicators of impairment existed as at December 31, 2019 and 2018 . The following table presents aggregated summarized financial information assuming a 100% ownership interest in the Partnership’s equity accounted joint ventures. The results included are for the Itajai FPSO joint venture and the Libra Joint Venture. As at December 31, 2019 2018 Current assets 159,045 148,208 Non-current assets 1,122,079 1,189,463 Current liabilities 127,110 139,777 Long-term liabilities 686,371 780,685 Year ended December 31, 2019 2018 2017 Revenues 264,266 264,215 90,662 Operating income 134,321 119,774 43,422 Net income 72,022 78,916 28,884 The Partnership does not control its equity-accounted vessels and as a result, the Partnership does not have the unilateral ability to determine whether the cash generated by its equity-accounted vessels is retained within the entities in which the Partnership holds the equity-accounted investments or distributed to the Partnership and other owners. In addition, the Partnership does not control the timing of such distributions to the Partnership and other owners .

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of presentation	Basis of presentation The consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (or GAAP ). These financial statements include the accounts of Teekay Offshore Partners L.P., which is a limited partnership organized under the laws of the Republic of the Marshall Islands, and its wholly owned or controlled subsidiaries (collectively, the Partnership ). Unless the context otherwise requires, the terms "we," "us," or "our," as used herein, refer to the Partnership. The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results may differ from those estimates.
Foreign currency	Foreign currency The consolidated financial statements are stated in U.S. Dollars and the functional currency of the Partnership is the U.S. Dollar. Transactions involving other currencies during the year are converted into U.S. Dollars using the exchange rates in effect at the time of the transactions. At the balance sheet dates, monetary assets and liabilities that are denominated in currencies other than the U.S. Dollar are translated to reflect the year-end exchange rates. Resulting gains or losses are reflected separately in the accompanying consolidated statements of loss .
Revenues and operating expenses	Revenues Each vessel charter may, depending on its terms, contain a lease component, a non-lease component or both. Revenues that are fixed on or prior to the commencement of the contract are recognized by the Partnership on a straight-line basis daily over the term of the contract. Where the term of the contract is based on the duration of a single voyage, the Partnership uses a discharge-to-discharge basis in determining proportionate performance for all tanker spot voyages that contain a lease and a load-to-discharge basis in determining proportionate performance for all tanker spot voyages that do not contain a lease. Consequently, the Partnership does not begin recognizing revenue until a voyage charter has been agreed to by the customer and the Partnership, even if the vessel has discharged its prior cargo and is sailing to the anticipated load location for its next voyage. For towage voyages, proportionate performance is determined based on commencement of the tow to completion of the tow. Reimbursements of vessel operating expenditures incurred to provide the contracted services to the charterer are recognized when the expenses entitling the Partnership to reimbursement are incurred. Revenue or penalties from performance-based metrics, such as production tariffs and other operational performance measures, are recognized as earned or incurred unless such performance-based revenue is based on a multi-period performance-based metric that is allocable to non-lease services provided. In such a case, the Partnership will estimate the amount of variable consideration, to the extent that it is probable that a significant reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently resolved and recognize such estimate of revenue over the performance period. The consolidated balance sheets reflect, in other current assets, the accrued portion of revenues for those voyages that commence prior to balance sheet date and complete after the balance sheet date and reflect, in deferred revenues or other long-term liabilities, the deferred portion of revenues which will be earned in subsequent periods. Prior to the adoption of the Financial Accounting Standards Board (or FASB ) Accounting Standards Update 2014-09, Revenue from Contracts with Customers (or ASU 2014-09 ) on January 1, 2018: • Voyage revenues from towage and offshore installation vessels were recognized over the period of the tow and the mobilization and demobilization of the towage vessel, instead of the period where the tow is being performed. The cumulative-effect adjustment on January 1, 2018 was insignificant. • Revenue from time-charter contracts with fixed annual increases in the daily hire rate during the firm period of the charter to compensate for expected inflationary cost increases were recognized when due under the contract, instead of on a smoothed basis over the term of the time-charter. For time-charters with a termination fee owing if the contract is not extended past the contract term, the non-lease portion of such termination fee was recognized when the termination fee was incurred, instead of recognized over the contract term. The cumulative-effect adjustment on January 1, 2018 was an increase to equity of $7.7 million . • Costs incurred by the Partnership for its onshore staff and seafarers related to the management of FPSO units owned by Teekay Corporation and other vessels were presented on a net basis, instead of presented as vessel operating expenses and the reimbursement of such expenses presented as revenue. There was no cumulative impact to opening equity as at January 1, 2018. • Operating costs for the Partnership's Volatile Organic Compounds (or VOC ) plants on certain shuttle tankers were presented on a net basis, instead of presented as vessel operating expenses and the reimbursement of such expenses presented as revenue. There was no cumulative impact to opening equity as at January 1, 2018. • The Partnership presented the net allocation for its vessels participating in revenue sharing arrangements as revenues, instead of the revenue from those voyages being presented in voyage revenues and the difference between this amount and the Partnership's net allocation from the revenue sharing arrangement being presented as voyage expenses. There was no cumulative impact to opening equity as at January 1, 2018. Operating expenses Voyage expenses are all expenses unique to a particular voyage, including bunker fuel expenses, port fees, cargo loading and unloading expenses, canal tolls, agency fees and commissions. Vessel operating expenses include crewing, ship management services, repairs and maintenance, insurance, stores, lube oils and communication expenses. Voyage expenses and vessel operating expenses are recognized when incurred except when the Partnership incurs pre-operational costs related to the repositioning of a vessel or offshore unit that relates directly to a specific customer contract, that generates or enhances resources of the Partnership that will be used in satisfying performance obligations in the future, and where such costs are expected to be recovered via the customer contract. In this case, such costs are deferred and amortized over the duration of the customer contract. Prior to the adoption of ASU 2014-09 on January 1, 2018, t he Partnership expensed such costs as incurred unless the costs were directly reimbursable by the contract or if they were related to the mo bilization of offshore assets to an oil field. The cumulative-effect adjustment on January 1, 2018 was an increase to equity of $29.4 million . The Partnership recognizes the expense from vessels time-chartered from other owners in time-charter hire expenses in the accompanying consolidated statements of loss . The Partnership has determined that all of its time-charter-in contracts contain both a lease component (lease of the vessel) and a non-lease component (operation of the vessel). The Partnership has allocated the contract consideration between the lease component and non-lease component on a relative standalone selling price basis. The Partnership has elected to recognize the lease payments of short-term leases in profit or loss on a straight-line basis over the lease term and variable lease payments in the period in which the obligation for those payments is incurred, which is consistent with the recognition of payment for the non-lease component. Short-term leases are leases with an original term of one year or less, excluding those leases with an option to extend the lease for greater than one year or an option to purchase the underlying asset that the lessee is reasonably certain to exercise.
Cash and cash equivalents	Cash and cash equivalents The Partnership classifies all highly-liquid investments with a maturity date of three months or less when purchased as cash and cash equivalents.
Accounts receivable and allowance for doubtful accounts	Accounts receivable and allowance for doubtful accounts Accounts receivable are recorded at the invoiced amount and do not bear interest. The allowance for doubtful accounts is the Partnership’s best estimate of the amount of probable credit losses in existing accounts receivable. The Partnership determines the allowance based on historical write-off experience and customer economic data. The Partnership reviews the allowance for doubtful accounts regularly and past due balances are reviewed for collectability. Account balances are charged against the allowance when the Partnership believes that the receivable will not be recovered.
Investment in equity accounted joint ventures	Investments in equity-accounted joint ventures The Partnership’s investments in equity-accounted joint ventures are accounted for using the equity method of accounting. Under the equity method of accounting, the initial cost of the investment is adjusted for subsequent additional investments and the Partnership’s proportionate share of earnings or losses and distributions. The Partnership evaluates its investments in joint ventures for impairment when events or circumstances indicate that the carrying value of such investments may have experienced an other-than-temporary decline in value below carrying value. If the estimated fair value is less than the carrying value, the carrying value is written down to its estimated fair value and the resulting impairment is recorded in the Partnership’s consolidated statements of loss .
Vessels and equipment	Vessels and equipment All pre-delivery costs incurred during the construction of newbuildings and conversions, including interest, supervision and technical costs, are capitalized. The acquisition cost and all costs incurred to restore used vessels purchased by the Partnership to the standards required to properly service the Partnership’s customers are capitalized. Vessel capital modifications include the addition of new equipment or can encompass various modifications to the vessel which are aimed at improving and/or increasing the operational efficiency and functionality of the asset. This type of expenditure is amortized over the estimated useful life of the modification. Expenditures covering recurring routine repairs or maintenance are expensed as incurred. Depreciation is calculated on a straight-line basis over a vessel’s estimated useful life to an estimated residual value. F loating production storage and offloading (or FPSO ) units are depreciated using an estimated useful life of 20 to 25 years commencing the date the unit is installed at the oil field and is in a condition that is ready to operate. Some of the Partnership’s FPSO units have oil field specific equipment, which is depreciated over the expected life of the oil field. Shuttle tankers are depreciated over an estimated useful life of 20 years commencing the date the vessel is delivered from the shipyard. Floating storage and off take (or FSO ) units are depreciated over the estimated contract term or the estimated useful life of the specific unit. The unit for maintenance and safety (or UMS ) is depreciated over an estimated useful life of 35 years commencing the date it arrived at the oil field and was in a condition that was ready to operate. Towage and offshore installation vessels are depreciated over an estimated useful life of 25 years commencing the date the vessel is delivered from the shipyard. Depreciation of vessels and equipment for the years ended December 31, 2019 , 2018 and 2017 , totaled $330.2 million , $348.4 million , and $286.1 million , respectively. Depreciation and amortization includes depreciation on all owned vessels. Interest costs capitalized to vessels and equipment for the years ended December 31, 2019 , 2018 and 2017 totaled $13.6 million , $11.1 million and $29.6 million , respectively. Generally, the Partnership dry docks each shuttle tanker and towage and offshore installation vessel every two and a half to five years . UMS, FSO and FPSO units are generally not dry docked. The Partnership capitalizes a portion of the costs incurred during dry docking and amortizes those costs on a straight-line basis from the completion of a dry docking over the estimated useful life of the dry dock. Included in capitalized dry docking are costs incurred as part of the dry docking to meet regulatory requirements, or expenditures that either add economic life to the vessel, increase the vessel’s earning capacity or improve the vessel’s operating efficiency. The Partnership expenses costs related to routine repairs and maintenance performed during dry docking that do not improve operating efficiency or extend the useful lives of the assets. Dry-docking activity for the three years ended December 31, 2019 , 2018 and 2017 is summarized as follows: Year Ended Year Ended Year Ended December 31, December 31, December 31, 2019 2018 2017 $ $ $ Balance at beginning of the year 42,538 42,829 49,238 Cost incurred for dry-docking 13,546 23,602 17,183 Dry-docking amortization (19,146 ) (23,893 ) (22,870 ) Write-down / sale of vessels with capitalized dry-dock costs — — (722 ) Balance at end of the year 36,938 42,538 42,829 Vessels and equipment that are “held and used” are assessed for impairment when events or circumstances indicate the carrying amount of the asset may not be recoverable. If the asset’s net carrying value exceeds the net undiscounted cash flows expected to be generated over its remaining useful life, the carrying amount of the asset is reduced to its estimated fair value. The estimated fair value for the Partnership’s impaired vessels is determined using discounted cash flows or appraised values. In cases where an active second hand sale and purchase market does not exist, the Partnership uses a discounted cash flow approach to estimate the fair value of an impaired vessel. In cases where an active second hand sale and purchase market exists, an appraised value is used to estimate the fair value of an impaired vessel. An appraised value is generally the amount the Partnership would expect to receive if it were to sell the vessel. Such appraisal is normally completed by the Partnership. When an asset impairment occurs, the Partnership adjusts the carrying value of the asset to its new cost base and writes off the asset's accumulated depreciation.
Asset retirement obligation	Asset retirement obligation The Partnership has an asset retirement obligation (or ARO ) relating to the sub-sea mooring and riser system associated with the Randgrid FSO unit. This obligation involves the costs associated with the restoration of the environment surrounding the facility and removal of all equipment, which are subsequently to be reimbursed by the charterer. This obligation is expected to be settled at the end of the contract under which the FSO unit operates, which as at December 31, 2019, was estimated to be May 2024. The Partnership records the fair value of an ARO as a liability in the period when the obligation arises. The fair value of the ARO is measured using expected future cash outflows discounted at the Partnership’s credit-adjusted risk-free interest rate. When the liability is recorded, and as the ARO will be covered by contractual payments to be received from the charterer, the Partnership records a separate receivable concurrently with the ARO being created. Each period, the liability is increased for the change in its present value. Changes in the amount or timing of the estimated ARO are recorded as an adjustment to the related liability and asset.
Debt issuance costs	Debt issuance costs Debt issuance costs related to a recognized debt liability, including bank fees, commissions and legal expenses, are capitalized and amortized over the term of the relevant loan facility to interest expense using an effective interest rate method. Debt issuance costs are presented as a reduction from the carrying amount of that debt liability, unless no amounts have been drawn under the debt liability or the debt issuance costs exceed the carrying value of the related debt liability, in which case the debt issuance costs are presented as other non-current assets. Fees paid to amend a non-revolving credit facility can be associated with the extinguishment of the old debt instrument and included in determining the debt extinguishment gain or loss to be recognized. Any unamortized debt issuance costs would be written off. If a debt amendment is considered not to be a substantial amendment, then the fees would be associated with the replacement or modified debt instrument and, along with any existing unamortized debt issuance costs and premium or discount, would be amortized as an adjustment of interest expense over the remaining term of the replacement or modified debt instrument using the effective interest method. Other related costs incurred with third parties directly related to the modification, other than the loan amendment fee, are expensed as incurred. Fees paid to amend revolving credit facilities are deferred and amortized over the term of the modified credit facility. If the borrowing capacity is increased as a result of the amendment, unamortized loan costs of the original facility would be deferred and amortized over the term of the modified credit facility. If the borrowing capacity is decreased as a result of the amendment, a proportionate amount, based on the reduction in borrowing capacity, of the unamortized debt issuance costs of the original facility would be written off and the remaining amount would be deferred and amortized over the term of the modified credit facility.
Goodwill	Goodwill Goodwill is not amortized, but reviewed for impairment at the reporting unit level on an annual basis or more frequently if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. When goodwill is reviewed for impairment, the Partnership will measure the amount by which a reporting unit’s carrying value exceeds its fair value, with the maximum impairment not to exceed the carrying value of goodwill.
Derivative instruments	Derivative instruments All derivative instruments are initially recorded at fair value as either assets or liabilities in the accompanying consolidated balance sheets and subsequently remeasured to fair value, regardless of the purpose or intent for holding the derivative. The method of recognizing the resulting gain or loss is dependent on whether the derivative contract is designed to hedge a specific risk and also qualifies and is designated for hedge accounting. During the year ended December 31, 2018, certain of the Partnership's interest rate swaps were designated in qualifying hedging relationships and hedge accounting was applied in the consolidated financial statements or within the Partnership's equity-accounted joint ventures (see note 12 ). When a derivative is designated in a cash flow hedge, the Partnership formally documents the relationship between the derivative and the hedged item. This documentation includes the strategy and risk management objective for undertaking the hedge and the method that will be used to assess the effectiveness of the hedge. Any hedge ineffectiveness is recognized immediately in earnings, as are any gains and losses on the derivative that are excluded from the assessment of hedge effectiveness. The Partnership does not apply hedge accounting if it is determined that the hedge was not effective or will no longer be effective, the derivative was sold or exercised, or the hedged item was sold, repaid or is no longer probable of occurring. As at December 31, 2018, the Partnership had de-designated all hedging relationships and during the year ended December 31, 2019, the Partnership did not apply hedge accounting to any of its derivative instruments. For derivative financial instruments designated in qualifying cash flow hedges, changes in the fair value of the effective portion of the derivative financial instruments are initially recorded as a component of accumulated other comprehensive income in equity. In the periods when the hedged items affect earnings, the associated fair value changes on the hedging derivatives are transferred from equity to the corresponding earnings line item in the consolidated statements of loss . If a cash flow hedge is de-desiganted and the originally hedged item is still considered probable of occurring, the gains and losses initially recognized in equity remain there until the hedged item impacts earnings, at which point they are transferred to the corresponding earnings line item in the consolidated statements of loss . If the hedged item is no longer probable of occurring, amounts recognized in equity are immediately transferred to the relevant earnings line item in the consolidated statements of loss . For derivative financial instruments that are not designated as accounting hedges, the changes in the fair value of the derivative financial instruments are recognized in earnings. Gains and losses from the Partnership’s non-designated foreign currency forward contracts and interest rate swaps are recorded in realized and unrealized loss on derivative instruments in the consolidated statements of loss . Gains and losses from the Partnership’s non-designated cross currency swaps are recorded in foreign currency exchange loss in the consolidated statements of loss .
Unit-based compensation	Unit-based compensation The Partnership grants restricted unit-based compensation awards as incentive-based compensation to certain employees of the Partnership and Teekay Corporation’s subsidiaries that provide services to the Partnership (see note 17 ). The Partnership measures the cost of such awards using an option pricing model to determine the grant date fair value of the award and recognizes that cost, net of estimated forfeitures, over the requisite service period. The requisite service period consists of the period from the grant date of the award to the earlier of the date of vesting or the date the recipient becomes eligible for retirement. For unit-based compensation awards subject to graded vesting, the Partnership calculates the value of the award as if it was one single award with one expected life and amortizes the calculated expense for the entire award on a straight-line basis over the requisite service period. Certain of these awards are cash settled. For cash settled awards, the fair value of such awards is remeasured at each reporting date, based on the fair market value of the Partnership's common units at that date, with the change in fair value recognized as compensation expense. Unit-based compensation expenses are recorded under general and administrative expenses in the Partnership’s consolidated statements of loss .
Income taxes	Income taxes The Partnership is subject to income taxes relating to its subsidiaries in Norway, Australia, Brazil, the United Kingdom, Singapore, Qatar, Canada, Luxembourg and the Netherlands. The Partnership accounts for such taxes using the liability method. Under the liability method, deferred tax assets and liabilities are recognized for the anticipated future tax effects of temporary differences between the financial statement basis and the tax basis of the Partnership’s assets and liabilities using the applicable jurisdictional tax rates. A valuation allowance for deferred tax assets is recorded when it is more likely than not that some or all of the benefit from the deferred tax asset will not be realized. Recognition of uncertain tax positions is dependent upon whether it is more-likely-than-not that a tax position taken or expected to be taken in a tax return will be sustained upon examination, including resolution of any related appeals or litigation processes, based on the technical merits of the position. If a tax position meets the more-likely-than-not recognition threshold, it is measured to determine the amount of benefit to recognize in the consolidated financial statements based on guidance in the interpretation. The Partnership recognizes interest and penalties related to uncertain tax positions in income tax (expense) recovery in the Partnership’s consolidated statements of loss .
Accounting pronouncements	Accounting Pronouncements In February 2016, the FASB issued Accounting Standards Update 2016-02, Leases (or ASU 2016-02 ). ASU 2016-02 establishes a right-of-use model that requires a lessee to record a right-of-use asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. For lessees, leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. ASU 2016-02 requires lessors to classify leases as a sales-type, direct financing, or operating lease. A lease is a sales-type lease if any one of five criteria are met, each of which indicate that the lease, in effect, transfers control of the underlying asset to the lessee. If none of those five criteria are met, but two additional criteria are both met, indicating that the lessor has transferred substantially all of the risks and benefits of the underlying asset to the lessee and a third party, the lease is a direct financing lease. All leases that are not sales-type leases or direct financing leases are operating leases. ASU 2016-02 was effective January 1, 2019, with early adoption permitted. In July 2018, FASB issued an additional Accounting Standards Update that made further amendments to accounting for leases, including allowing the use of a transition approach whereby a cumulative effect adjustment is made as of the effective date, with no retrospective effect. The Partnership elected to use this new optional transition approach. The Partnership adopted ASU 2016-02 on January 1, 2019. To determine the cumulative effect adjustment, the Partnership has not reassessed whether any expired or existing contracts are, or contain leases, has not reassessed lease classification, and has not reassessed initial direct costs for any existing leases. The adoption of ASU 2016-02 has resulted in a change in the accounting method for the lease portion of the daily charter hire for the Partnership's chartered-in vessels accounted for as operating leases with firm periods of greater than one year. As of January 1, 2019, the Partnership had four in-chartered vessels in its fleet, the accounting for three of which vessels was impacted by the adoption of ASU 2016-02, as well as a small number of office leases. Under ASU 2016-02, the Partnership has recognized a right-of-use asset and a lease liability on the balance sheet for these charters and office leases based on the present value of future minimum lease payments, whereas previously no right-of-use asset or lease liability was recognized. The right-of-use asset and lease liability recognized on January 1, 2019 was $19.4 million and as at December 31, 2019 it was $57.7 million . As at December 31, 2019 , the right-of-use asset is included in Other assets, and the lease liability in Other current liabilities and Other long-term liabilities, on the Partnership's consolidated balance sheet. The pattern of expense recognition of chartered-in vessels is expected to remain substantially unchanged, unless the right-of-use asset becomes impaired. In addition, under ASU 2016-02, direct financing lease payments received have been presented as an operating cash inflow instead of an investing cash inflow in the statement of cash flows. Direct financing lease payments received during the year ended December 31, 2019 were $0.9 million . The Partnership’s FPSO contracts, contracts of affreightment (or CoAs ), time charters, and voyage charters include both a lease component, consisting of the lease of the vessel, and a non-lease component, consisting of operation of the vessel for the customer. The Partnership has elected to not separate the non-lease component from the lease component for all such charters, where the lease component is classified as an operating lease, and account for the combined components as an operating lease. In June 2016, the FASB issued Accounting Standards Update 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments (or ASU 2016-13 ). ASU 2016-13 replaces the incurred loss impairment methodology with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. This update became effective for the Partnership on January 1, 2020, with a modified-retrospective approach. The Partnership is currently evaluating the effect of adopting this new guidance. Based on the Partnership's preliminary assessment, adoption of ASU 2016-13 is not expected to have a material impact on the Partnership's consolidated financial statements. In December 2019, the FASB issued Accounting Standards Update 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (or ASU 2019-12 ), as part of its initiative to reduce complexity in the accounting standards. The amendments in ASU 2019-12 eliminate certain exceptions related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences, among other changes. The guidance becomes effective for annual reporting periods beginning after December 15, 2020 and interim periods within those fiscal years. Early adoption is permitted, including adoption in any interim period. The Partnership is currently evaluating the effect of adopting this new guidance.
Fair value measurements	The Partnership categorizes its fair value estimates using a fair value hierarchy based on the inputs used to measure fair value. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value as follows: Level 1. Observable inputs such as quoted prices in active markets; Level 2. Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and Level 3. Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions. Fair value measurements The following methods and assumptions were used to estimate the fair value of each class of financial instrument: Cash and cash equivalents and restricted cash - The fair values of the Partnership’s cash and cash equivalents and restricted cash approximate their carrying amounts reported in the accompanying consolidated balance sheets.
Derivative instruments and Long-term debt	Derivative instruments – The fair value of the Partnership’s derivative instruments is the estimated amount that the Partnership would receive or pay to terminate the agreements at the reporting date, taking into account current interest rates, foreign exchange rates and the current credit worthiness of both the Partnership and the derivative counterparties. The estimated amount is the present value of future cash flows. The Partnership transacts all of its derivative instruments through investment-grade rated financial institutions at the time of the transaction. The Partnership’s interest rate swap agreements and foreign currency forward contracts require no collateral from these institutions. As at December 31, 2018, the Partnership had $1.2 million (December 31, 2019 - $ nil ) on deposit with the relevant counterparties as security for cross currency swap liabilities under certain master agreements. The deposit is presented in restricted cash on the consolidated balance sheet as at December 31, 2018. Long-term debt – The fair value of the Partnership’s fixed-rate and variable-rate long-term debt is either based on quoted market prices or estimated using discounted cash flow analysis based on rates currently available for debt with similar terms and remaining maturities and the current credit worthiness of the Partnership.
Segment reporting	Segment Reporting The Partnership is engaged in the international marine transportation of crude oil, the offshore processing and storage of crude oil, long-distance ocean towage and offshore installation services, and maintenance and safety services through the operation of its shuttle tankers, FSO units, FPSO units, towage and offshore installation vessels and UMS. The Partnership’s revenues are earned in international markets. The Partnership has six reportable segments: its FPSO segment; its shuttle tanker segment; its FSO segment; its UMS segment; its towage and offshore installation vessels (or towage ) segment; and its conventional tanker segment. The Partnership’s FPSO segment consists of its FPSO units to service its FPSO contracts. The Partnership’s shuttle tanker segment consists of shuttle tankers operating primarily on fixed-rate contracts of affreightment, time-charter contracts or bareboat charter contracts. The Partnership’s FSO segment consists of its FSO units subject to fixed-rate, time-charter contracts or bareboat charter contracts. The Partnership’s UMS segment consists of one unit currently in lay-up. The Partnership’s towage and offshore installation vessels segment consists of long-distance towage and offshore installation vessels which operate on time-charter or voyage charter contracts. During 2019, the Partnership redelivered its two in-chartered conventional tankers to their owners and ceased operations in this segment. The accounting policies applied to the reportable segments are the same as those used in the preparation of the Partnership’s consolidated financial statements.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Dry-Docking Activity	Dry-docking activity for the three years ended December 31, 2019 , 2018 and 2017 is summarized as follows: Year Ended Year Ended Year Ended December 31, December 31, December 31, 2019 2018 2017 $ $ $ Balance at beginning of the year 42,538 42,829 49,238 Cost incurred for dry-docking 13,546 23,602 17,183 Dry-docking amortization (19,146 ) (23,893 ) (22,870 ) Write-down / sale of vessels with capitalized dry-dock costs — — (722 ) Balance at end of the year 36,938 42,538 42,829

Fair Value Measurements and F_2

Fair Value Measurements and Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Estimated Fair Value of Financial Instruments Measured at Fair Value on Recurring Basis	The following table includes the estimated fair value and carrying value of those assets and liabilities that are measured at fair value on a recurring and non-recurring basis, as well as the estimated fair value of the Partnership’s financial instruments that are not accounted for at fair value on a recurring basis: December 31, 2019 December 31, 2018 Fair Value Hierarchy Level Carrying Amount Asset (Liability) $ Fair Value Asset (Liability) $ Carrying Amount Asset (Liability) $ Fair Value Asset (Liability) $ Recurring: Cash and cash equivalents and restricted cash Level 1 306,256 306,256 233,580 233,580 Derivatives instruments (note 12) Interest rate swap agreements Level 2 (163,972 ) (163,972 ) (107,074 ) (107,074 ) Cross currency swap agreement Level 2 — — (4,538 ) (4,538 ) Foreign currency forward contracts Level 2 575 575 (4,650 ) (4,650 ) Non-Recurring: Vessels held for sale ( note 18 ) Level 2 15,374 15,374 — — Vessels and equipment ( note 18 ) Level 2 176,577 176,577 — — Other: Long-term debt - public (note 8) Level 1 (1,067,740 ) (1,069,204 ) (1,027,696 ) (977,917 ) Long-term debt - non-public (note 8) Level 2 (2,111,210 ) (2,136,315 ) (2,070,046 ) (2,082,316 ) Due to related parties - current (notes 11c and 11j) Level 2 (20,000 ) (19,781 ) (125,000 ) (123,025 ) Obligations related to finance leases (note 14c) Level 2 (21,453 ) (23,800 ) — —
Summary of Partnership's Financing Receivables	The following table contains a summary of the Partnership’s financing receivables by type of borrower and the method by which the Partnership monitors the credit quality of its financing receivables on a quarterly basis: Credit Quality Indicator Grade Year Ended Year Ended Direct financing leases Payment activity Performing 3,875 4,793

Segment Reporting (Tables)

Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Revenues and Percentage of Consolidated Revenues	The following table presents revenues and percentage of consolidated revenues for customers that accounted for more than 10% of the Partnership’s consolidated revenues during the periods presented: (U.S. Dollars in millions) Year Ended Year Ended Year Ended Royal Dutch Shell Plc (1) $311.3 or 25% $327.6 or 23% $338.2 or 31% Equinor ASA (formerly Statoil ASA) (2) $170.8 or 13% $182.1 or 13% $114.5 or 10% Petroleo Brasileiro S.A. (1) — (3) $254.8 or 18% $190.7 or 17% Premier Oil (4) — (3) — (3) $113.5 or 10% (1) Shuttle tanker and FPSO segments. (2) Shuttle tanker and FSO segments. (3) Percentage of consolidated revenue was less than 10% . (4) FPSO segment.
Segment Results as Presented in Consolidated Financial Statements	The following tables include results for the Partnership’s FPSO unit segment; shuttle tanker segment; FSO unit segment; UMS segment; towage segment; and conventional tanker segment for the periods presented in these consolidated financial statements: Year ended December 31, 2019 FPSO Segment Shuttle Tanker Segment FSO Segment UMS Segment Towage Segment Conventional Tanker Segment Corporate/Eliminations (2) Total Revenues 492,658 549,587 140,117 2,940 74,726 7,972 — 1,268,000 Voyage expenses — (86,519 ) (800 ) (76 ) (37,530 ) (4,985 ) — (129,910 ) Vessel operating expenses (227,873 ) (126,433 ) (42,597 ) (1,216 ) (28,832 ) — — (426,951 ) Time-charter hire expenses — (40,108 ) — — — (4,319 ) — (44,427 ) General and administrative (1) (40,846 ) (20,788 ) (4,006 ) (6,100 ) (4,401 ) (104 ) — (76,245 ) Realized loss on foreign currency forward contracts — — — — — — (5,054 ) (5,054 ) Adjusted EBITDA from equity-accounted vessels 97,849 — — — — — — 97,849 Adjusted EBITDA attributable to non-controlling interests — (10,864 ) (500 ) — — — — (11,364 ) Adjusted EBITDA 321,788 264,875 92,214 (4,452 ) 3,963 (1,436 ) (5,054 ) 671,898 Equity income 32,794 — — — — — — 32,794 Investment in joint ventures 234,627 — — — — — — 234,627 Expenditures for vessels and equipment, including advances on newbuilding contracts (3) 8,284 185,156 6,967 922 110 — — 201,439 Expenditures for dry docking — 11,902 — — 1,644 — — 13,546 Year ended December 31, 2018 FPSO Segment Shuttle Tanker Segment FSO Segment UMS Segment Towage Segment Conventional Tanker Segment Corporate/Eliminations (2) Total Revenues (4) 533,186 636,413 136,557 36,536 53,327 21,325 (920 ) 1,416,424 Voyage expenses — (109,796 ) (769 ) (47 ) (28,925 ) (12,453 ) 182 (151,808 ) Vessel operating expenses (214,623 ) (149,226 ) (42,913 ) (3,679 ) (27,346 ) — 116 (437,671 ) Time-charter hire expenses — (36,421 ) — — — (16,195 ) — (52,616 ) General and administrative (1) (34,052 ) (21,763 ) (2,174 ) (3,547 ) (3,531 ) (360 ) — (65,427 ) Restructuring charge (1,520 ) — — — — — — (1,520 ) Realized loss on foreign currency forward contracts — — — — — — (1,228 ) (1,228 ) Adjusted EBITDA from equity-accounted vessels 92,637 — — — — — — 92,637 Adjusted EBITDA attributable to non-controlling interests — (15,593 ) (677 ) — — — — (16,270 ) Adjusted EBITDA 375,628 303,614 90,024 29,263 (6,475 ) (7,683 ) (1,850 ) 782,521 Equity income 39,458 — — — — — — 39,458 Investment in joint ventures 212,202 — — — — — — 212,202 Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs (3) 54,371 147,540 6,987 — 24,838 — — 233,736 Expenditures for dry docking — 22,135 — — 1,467 — — 23,602 Year ended December 31, 2017 FPSO Segment Shuttle Tanker Segment FSO Segment UMS Segment Towage Segment Conventional Tanker Segment Corporate/Eliminations (2) Total Revenues 458,388 536,852 66,901 4,236 38,771 14,022 (8,886 ) 1,110,284 Voyage expenses — (80,964 ) (1,172 ) (1,152 ) (17,727 ) (359 ) 1,930 (99,444 ) Vessel operating (expenses) recoveries (149,153 ) (129,517 ) (25,241 ) (33,656 ) (21,074 ) 10 5,067 (353,564 ) Time-charter hire expenses — (62,899 ) — — (925 ) (16,491 ) — (80,315 ) General and administrative (1) (33,046 ) (17,425 ) (1,864 ) (5,068 ) (4,486 ) (360 ) — (62,249 ) Restructuring charge (450 ) (210 ) — (2,004 ) — — — (2,664 ) Realized gain on foreign currency forward contracts — — — — — — 900 900 Adjusted EBITDA from equity-accounted vessels 33,360 — — — — — — 33,360 Adjusted EBITDA attributable to non-controlling interests — (23,035 ) (879 ) — — — — (23,914 ) Adjusted EBITDA 309,099 222,802 37,745 (37,644 ) (5,441 ) (3,178 ) (989 ) 522,394 Equity income 14,442 — — — — — — 14,442 Investment in joint ventures 169,875 — — — — — — 169,875 Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs (3) 193,817 216,157 88,039 3,931 31,316 — — 533,260 Expenditures for dry docking — 16,323 199 — 661 — — 17,183 (1) Includes direct general and administrative expenses and indirect general and administrative expenses (allocated to each segment based on estimated use of corporate resources). (2) Includes revenues and expenses earned and incurred between segments of the Partnership, during the years ended December 31, 2018 and 2017. (3) Expenditures for vessels and equipment, including advances on newbuilding contracts for the year ended December 31, 2019 includes: Shuttle Tanker Segment - installment payments on the seven shuttle tanker newbuildings (see note 14c). Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs for the year ended December 31, 2018 includes: FPSO Segment - upgrade costs on the Petrojarl I FPSO unit; Shuttle Tanker Segment - the final East Coast of Canada newbuilding installment payment and installment payments on six Shuttle Spirit shuttle tanker newbuildings (see note 14c); Towage Segment - the final installment payment on one newbuilding towage and offshore installation vessel. Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs for the year ended December 31, 2017 includes: FPSO Segment - upgrade costs on the Petrojarl I FPSO unit; Shuttle Tanker Segment - installment payments on the three East Coast of Canada shuttle tanker newbuildings and two Shuttle Spirit shuttle tanker newbuildings (see note 14c); FSO Segment - conversion costs on the Randgrid FSO unit; Towage Segment - installment payments on three newbuilding towage and offshore installation vessels. (4) Includes revenues of $55.0 million and $36.5 million in the Shuttle Tanker and UMS segments, respectively, during the year ended December 31, 2018 related to a settlement agreement with Petrobras and Petroleo Netherlands B.V. - PNBV S.A. (or Petrobras ) in relation to the previously-terminated charter contracts of the HiLoad DP unit and Arendal Spirit UMS (see note 5). The following table includes reconciliations of Adjusted EBITDA to net loss for the periods presented in these consolidated financial statements: Year ended December 31, 2019 Year ended December 31, 2018 Year ended December 31, 2017 Adjusted EBITDA 671,898 782,521 522,394 Depreciation and amortization (1) (349,379 ) (372,290 ) (309,975 ) (Write-down) and gain on sale of vessels (2) (332,125 ) (223,355 ) (318,078 ) Interest expense (205,709 ) (199,395 ) (154,890 ) Interest income 5,111 3,598 2,707 Realized and unrealized (loss) gain on derivative instruments (3) (80,141 ) 14,036 (43,753 ) Foreign currency exchange gain (loss) 2,193 (9,413 ) (14,006 ) Losses on debt repurchases — (55,479 ) (3,102 ) Other (expense) income - net (1,225 ) (4,602 ) 14,167 Expenses and losses relating to equity accounted investments (4) (65,055 ) (53,179 ) (18,918 ) Adjusted EBITDA attributable to non-controlling interests 11,364 16,270 23,914 Loss before income tax (expense) recovery (343,068 ) (101,288 ) (299,540 ) Income tax (expense) recovery (7,827 ) (22,657 ) 98 Net loss (350,895 ) (123,945 ) (299,442 ) (1) Depreciation and amortization by segment for the year ended December 31, 2019 is as follows: FPSO $145.9 million , Shuttle Tanker $134.3 million , FSO $41.7 million , UMS $6.6 million and Towage $20.9 million . Depreciation and amortization by segment for the year ended December 31, 2018 is as follows: FPSO $145.5 million , Shuttle Tanker $155.9 million , FSO $44.1 million , UMS $6.6 million , Towage $20.3 million and eliminations of amounts incurred between segments of ($0.1) million . Depreciation and amortization by segment for the year ended December 31, 2017 is as follows: FPSO $143.6 million , Shuttle Tanker $125.6 million , FSO $19.4 million , UMS $6.6 million , Towage $15.6 million and eliminations of amounts incurred between segments of ($0.8) million . (2) (Write-down) and gain on sale of vessels by segment for the year ended December 31, 2019 is as follows: FPSO ($227.4) million , Shuttle Tanker ($0.9) million , FSO $11.2 million , UMS ($115.0) million . (Write-down) and gain on sale of vessels by segment for the year ended December 31, 2018 is as follows: FPSO ($180.2) million , Shuttle Tanker ($43.2) million . (Write-down) and gain on sale of vessels by segment for the year ended December 31, 2017 is as follows: FPSO ($265.2) million , Shuttle Tanker ($51.7) million , FSO ($1.1) million . (3) Excludes the realized gain (loss) on foreign currency forward contracts. (4) Includes depreciation and amortization, interest expense, interest income, realized and unrealized gain (loss) on derivative instruments, foreign currency exchange gain (loss) and income tax expense relating to equity accounted investments. The sum of (a) Adjusted EBITDA from equity-accounted vessels as presented in the tables above as part of the results for the Partnership’s reportable segments and (b) expenses and gains (losses) relating to equity accounted investments from this table equals the amount of equity income included on the Partnership's consolidated statements of loss.
Reconciliation of Total Segment Assets to Total Assets Presented in Accompanying Consolidated Balance Sheets	A reconciliation of total segment assets to total assets presented in the accompanying consolidated balance sheets is as follows: December 31, 2019 December 31, 2018 FPSO segment 1,913,420 2,279,277 Shuttle tanker segment 1,778,073 1,684,887 FSO segment 425,694 463,647 Towage segment 390,895 419,000 UMS segment 101,009 220,509 Conventional tanker segment — 4,259 Unallocated: Cash and cash equivalents and restricted cash 306,256 233,580 Other assets 7,920 6,893 Consolidated total assets 4,923,267 5,312,052

Revenues (Tables)

Revenues (Tables)	12 Months Ended
	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Schedule of Partnership Revenue	The following tables contain the Partnership’s revenue for the years ended December 31, 2019 , 2018 and 2017 , by contract type and by segment: Year ended December 31, 2019 FPSO Segment Shuttle Tanker Segment FSO Segment UMS Segment Towage Segment Conventional Tanker Segment Eliminations Total FPSO contracts 421,363 — — — — — — 421,363 CoAs — 188,277 — — — — — 188,277 Time charters — 293,095 121,762 — — — — 414,857 Bareboat charters — 34,611 15,178 — — — — 49,789 Voyage charters — 24,315 — — 74,726 7,972 — 107,013 Management fees and other 71,295 9,289 3,177 2,940 — — — 86,701 492,658 549,587 140,117 2,940 74,726 7,972 — 1,268,000 Year ended December 31, 2018 FPSO Segment Shuttle Tanker Segment FSO Segment UMS Segment Towage Segment Conventional Tanker Segment Eliminations (1) Total FPSO contracts 481,700 — — — — — — 481,700 CoAs — 198,448 — — — — — 198,448 Time charters — 294,112 116,125 — — — — 410,237 Bareboat charters — 44,759 17,383 — — — — 62,142 Voyage charters — 28,027 — — 53,327 21,325 (920 ) 101,759 Management fees and other (2) 51,486 71,067 3,049 36,536 — — — 162,138 533,186 636,413 136,557 36,536 53,327 21,325 (920 ) 1,416,424 Year ended December 31, 2017 FPSO Segment Shuttle Tanker Segment FSO Segment UMS Segment Towage Segment Conventional Tanker Segment Eliminations (1) Total FPSO contracts 458,388 — — — — — — 458,388 CoAs — 170,703 — — — — — 170,703 Time charters — 284,281 47,605 4,236 — 9,132 — 345,254 Bareboat charters — 69,568 19,296 — — — — 88,864 Voyage charters — 12,300 — — 38,771 4,890 (8,886 ) 47,075 458,388 536,852 66,901 4,236 38,771 14,022 (8,886 ) 1,110,284 (1) Includes revenues earned between segments of the Partnership, during the years ended December 31, 2018 and December 31, 2017. (2) Includes revenues of $55.0 million and $36.5 million in the shuttle tanker and UMS segments, respectively, related to a settlement agreement with Petrobras in relation to the previously-terminated charter contracts of the HiLoad DP unit and Arendal Spirit UMS. As part of the settlement agreement, Petrobras has agreed to pay a total amount of $96.0 million to the Partnership, which includes $55.0 million that was paid November 2018, and amounts of $22.0 million payable in late-2020 and $19.0 million payable in late-2021, which are available to be reduced by 40% of the revenues paid prior to the end of 2021 by Petrobras under any new contracts entered into subsequent to October 25, 2018 relating specifically to the Arendal Spirit UMS and the Ostras and Piranema Spirit FPSO units. The following table contains the Partnership’s revenue by lease and non-lease contracts for the years ended December 31, 2019 , 2018 and 2017 : Year ended December 31, 2019 2018 2017 $ $ $ Lease revenue Lease revenue from lease payments of direct financing and sales type leases 858 1,720 2,396 Lease revenue from lease payments of operating leases 1,079,356 1,175,073 1,028,123 Variable lease payments - cost reimbursements (1) 11,314 19,316 33,159 Variable lease payments (2) 15,045 303 2,022 1,106,573 1,196,412 1,065,700 Non-lease revenue Non-lease revenue - related to sales type or direct financing leases — 4,547 5,813 Voyage charters - towage 74,726 53,327 38,771 Management fees and other 86,701 162,138 — 161,427 220,012 44,584 1,268,000 1,416,424 1,110,284 (1) Reimbursements for vessel operating expenditures received from the Partnership’s customers relating to such costs incurred by the Partnership to operate the vessel for the customer. (2) Compensation from production tariffs, which are based on the volume of oil produced, the price of oil, as well as other monthly or annual operational performance measures.
Schedule of Contract Assets and Contract Liabilities	The following table presents the contract assets and contract liabilities on the Partnership’s consolidated balance sheets associated with these long-term charter arrangements from contracts with customers: December 31, 2019 December 31, 2018 $ $ Contract Assets Current 3,816 7,926 Non-Current 74,830 62,295 78,646 70,221 Contract Liabilities Current 53,728 55,750 Non-Current 84,077 145,852 137,805 201,602
Schedule of Balances of Assets Recognized from the Costs to Fulfill Contract with Customer	The balances of assets recognized from the costs to fulfill a contract with a customer classified as other assets, split between current and non-current portions, on the Partnership's balance sheet, by main category, excluding balances in the Partnership’s equity accounted joint ventures, are as follows: Year ended December 31, 2019 2018 2017 $ $ $ Pre-operational costs 12,836 24,031 4,522 Offshore asset mobilization costs 35,632 51,302 57,818 Vessel repositioning costs 13,379 15,188 — 61,847 90,521 62,340

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2019
Payables and Accruals [Abstract]
Components of Accrued Liabilities	December 31, 2019 December 31, 2018 Interest including interest rate swaps 48,047 44,887 Payroll and benefits 36,807 34,828 Audit, legal, contingency and other general expenses 32,372 21,626 Voyage and vessel expenses 19,829 25,475 Income and other tax payable 3,921 3,080 140,976 129,896

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Long-Term Debt	December 31, 2019 December 31, 2018 U.S. Dollar-denominated Revolving Credit Facilities due through 2024 513,200 523,125 U.S. Dollar-denominated Term Loans due through 2032 1,357,236 1,388,107 U.S. Dollar-denominated Term Loan due through 2021 42,073 55,018 U.S. Dollar Bonds due through 2024 1,075,000 1,024,816 U.S. Dollar Non-Public Bonds due through 2027 241,145 141,158 Norwegian Krone Bonds due through 2019 — 9,953 Total principal 3,228,654 3,142,177 Less debt issuance costs and other (49,704 ) (44,435 ) Total debt 3,178,950 3,097,742 Less current portion (353,238 ) (554,336 ) Long-term portion 2,825,712 2,543,406

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Lessee, Operating Lease, Liability, Maturity	A maturity analysis of the Partnership’s operating lease liabilities from time-charter-in contracts (excluding short-term leases) as at December 31, 2019 is as follows: Lease Commitment Non-Lease Commitment Total Commitment As at December 31, 2019 $ $ $ Payments: January to December 2020 11,694 7,552 19,246 January to December 2021 11,829 7,639 19,468 January to December 2022 11,995 7,746 19,741 January to December 2023 11,225 7,249 18,474 January to December 2024 641 414 1,055 Total payments 47,384 30,600 77,984 Less imputed interest (4,840 ) Carrying value of operating lease liabilities 42,544

Related Party Transactions an_2

Related Party Transactions and Balances (Tables)	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Revenues (Expenses) from Related Party Transactions	The Partnership's related party transactions recognized in the consolidated statements of loss were as follows for the periods indicated: Year Ended December 31, 2019 2018 2017 Revenues (1) 42,628 117,764 49,509 Vessel operating expenses (2) (2,535 ) (6,298 ) (32,346 ) General and administrative (3) (8,811 ) (18,162 ) (31,340 ) Interest expense (4)(5)(6)(7)(8) (46,744 ) (38,695 ) (25,882 ) Losses on debt repurchases (9) — (46,041 ) — (1) Includes revenue from time-charter-out or bareboat contracts with subsidiaries of Teekay Corporation, including management fees for ship management services provided by the Partnership to a subsidiary of Teekay Corporation prior to May 8, 2019. (2) Includes ship management and crew training services provided by Teekay Corporation prior to May 8, 2019. (3) Includes commercial, technical, strategic, business development and administrative management fees charged by Teekay Corporation and reimbursements to Teekay Corporation for costs incurred on the Partnership’s behalf prior to May 8, 2019 and reimbursements to the general partner for costs incurred on the Partnership’s behalf. (4) Includes interest expense of $8.3 million for the year ended December 31, 2019 (December 31, 2018 and 2017 - $ 5.0 million and nil , respectively), incurred on the unsecured revolving credit facility provided by Brookfield and by Teekay Corporation prior to May 8, 2019 (see note 11j). (5) Includes interest expense of $38.5 million for the year ended December 31, 2019 (December 31, 2018 and 2017 - $21.0 million and nil , respectively), incurred on a portion of five-year senior unsecured bonds held by Brookfield (see note 11k). (6) Includes interest expense of $10.0 million for the year ended December 31, 2018 (December 31, 2017 - $5.3 million ), and accretion expense of $2.7 million for the year ended December 31, 2018 (December 31, 2017 - $2.2 million ), incurred on the Brookfield Promissory Note (see note 11h). (7) Includes interest expense of $14.6 million for the year ended December 31, 2017, incurred on the 2016 Teekay Corporation Promissory Note (see note 11g). (8) Includes a guarantee fee to Teekay Corporation related to the final bullet payment of the Piranema Spirit FPSO unit debt facility, which was repaid in March 2017, and a guarantee fee to Teekay Corporation related to the Partnership's liabilities associated with the long-term debt financing relating to the East Coast of Canada shuttle tanker newbuildings and certain of the Partnership's interest rate swaps and cross currency swaps until September 25, 2017 (see notes 11i and 12). (9) Includes the loss on the Partnership's prepayment of the Brookfield Promissory Note, which includes the acceleration of non-cash accretion expense of $31.5 million resulting from the difference between the $200.0 million settlement amount at its par value and its carrying value of $168.5 million , an associated early termination fee of $12.0 million paid to Brookfield and the write-off of capitalized loan costs (see note 11k).

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Foreign Currency Forward Contracts	As at December 31, 2019 , the Partnership was committed to the following foreign currency forward contracts: Contract Amount Fair Value / Carrying Average Forward Rate (1) Expected Maturity 2020 (in thousands of U.S. Dollars) Norwegian Krone 457,205 518 8.87 51,567 Euro 5,000 57 0.90 5,563 575 57,130 (1) Average forward rate represents the contracted amount of foreign currency one U.S. Dollar will buy.
Schedule of Interest Rate Swap Agreements	As at December 31, 2019 , the Partnership and its consolidated subsidiaries were committed to the following interest rate swap agreements: Fair Value / Carrying Weighted- Amount of Average Fixed Interest Notional Assets Remaining Interest Rate Amount (Liability) Term Rate Index $ $ (years) (%) (1) U.S. Dollar-denominated interest rate swaps (2) LIBOR 680,648 (126,630 ) 5.5 4.0 % U.S. Dollar-denominated interest rate swaps (3) LIBOR 603,071 (37,342 ) 2.4 3.2 % 1,283,719 (163,972 ) (1) Excludes the margin the Partnership pays on its variable-rate debt, which as at December 31, 2019 , ranged from 0.90% to 6.50% . (2) Notional amount remains constant over the term of the swap, unless the swap is partially terminated. (3) Principal amount reduces quarterly or semi-annually.
Effective Portion of Gains (Losses) on Interest Rate Swap Agreements	The following tables exclude any interest rate swap agreements designated and qualifying as cash flow hedges in the Partnership’s equity accounted joint ventures. Year Ended December 31, 2019 Year Ended December 31, 2018 Effective Portion Recognized in AOCI (1) Effective Portion Reclassified from AOCI (2) Ineffective Portion (3) Effective Portion Recognized in AOCI (1) Effective Portion Reclassified from AOCI (2) Ineffective Portion (3) — 689 — Interest expense (2,495 ) 102 — Interest expense — 689 — (2,495 ) 102 — Year Ended December 31, 2017 Effective Portion Recognized in AOCI (1) Effective Portion Reclassified from AOCI (2) Ineffective Portion (3) (19 ) (1,186 ) (7 ) Interest expense (19 ) (1,186 ) (7 ) (1) Effective portion of designated and qualifying cash flow hedges recognized in accumulated other comprehensive income (or AOCI ). (2) Effective portion of designated and qualifying cash flow hedges recorded in AOCI during the term of the hedging relationship and reclassified to earnings. (3) Ineffective portion of designated and qualifying cash flow hedges.
Location and Fair Value Amounts of Derivative Instruments	The following table presents the location and fair value amounts of derivative instruments, segregated by type of contract, on the Partnership’s balance sheets. Other Other Accrued Current Derivative As at December 31, 2019 Foreign currency contracts 1,123 — — (548 ) — Interest rate swaps — — (2,342 ) (18,408 ) (143,222 ) 1,123 — (2,342 ) (18,956 ) (143,222 ) As at December 31, 2018 Foreign currency contracts — — — (4,225 ) (425 ) Cross currency swaps — — (96 ) (4,442 ) — Interest rate swaps 1,028 2,075 (1,625 ) (14,623 ) (93,929 ) 1,028 2,075 (1,721 ) (23,290 ) (94,354 )
Effect of (Losses) Gains on Derivatives	Total realized and unrealized (loss) gain of interest rate swaps and foreign currency forward contracts that are not designated for accounting purposes as cash flow hedges are recognized in earnings and reported in realized and unrealized (loss) gain on derivative instruments in the consolidated statements of loss for the years ended December 31, 2019 , 2018 and 2017 as follows: Year Ended Year Ended Year Ended Realized (loss) gain on derivative instruments Interest rate swaps (29,185 ) (38,011 ) (78,296 ) Foreign currency forward contracts (5,054 ) (1,228 ) 900 (34,239 ) (39,239 ) (77,396 ) Unrealized (loss) gain on derivative instruments Interest rate swaps (56,182 ) 56,420 33,114 Foreign currency forward contracts 5,226 (4,373 ) 1,429 (50,956 ) 52,047 34,543 Total realized and unrealized (loss) gain on derivative instruments (85,195 ) 12,808 (42,853 )
Summary of Cross Currency Swaps	Realized and unrealized gain (loss) on cross currency swaps are recognized in earnings and reported in foreign currency exchange gain (loss) in the consolidated statements of loss for the years ended December 31, 2019 , 2018 and 2017 as follows: Year Ended Year Ended Year Ended Realized loss (4,177 ) (39,647 ) (84,205 ) Unrealized gain 4,442 38,648 91,914 Total realized and unrealized gain (loss) on cross currency swaps 265 (999 ) 7,709

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Components of Partnership's Deferred Tax Assets and Liabilities	The significant components of the Partnership’s deferred tax assets and liabilities are as follows: December 31, December 31, Deferred tax assets: Tax losses carried forward (1) 240,432 251,240 Other 9,348 2,887 Total deferred tax assets 249,780 254,127 Deferred tax liabilities: Vessels and equipment 20,179 17,018 Other 3,566 5,531 Total deferred tax liabilities 23,745 22,549 Net deferred tax assets 226,035 231,578 Valuation allowance (222,168 ) (224,593 ) Net deferred tax assets 3,867 6,985 Disclosed in: Deferred tax asset 7,000 9,168 Other long-term liabilities 3,133 2,183 Net deferred tax assets 3,867 6,985 (1) As at December 31, 2019 , the income tax losses carried forward of $1,021.1 million ( December 31, 2018 - $1,040.4 million ) are available to offset future taxable income in the applicable jurisdictions, of which $632.7 million can be carried forward indefinitely, $0.9 million will expire in 2020, $0.4 million will expire in 2021, $0.5 million will expire in 2022, $2.2 million will expire in 2023, $0.3 million will expire in 2024, $0.6 million will expire in 2025, $0.1 million will expire in 2026, $377.8 million will expire in 2034 and $5.6 million will expire in 2035.
Components of Provision for Income Taxes	The components of the provision for income taxes are as follows: Year Ended Year Ended Year Ended Current (4,666 ) (4,051 ) (1,772 ) Deferred (3,161 ) (18,606 ) 1,870 Income tax (expense) recovery (7,827 ) (22,657 ) 98
Reconciliations of Income Tax Rate and Actual Tax Charge	Reconciliations of the tax charge related to the current year at the applicable statutory income tax rates and the actual tax charge related to the current year are as follows: Year Ended Year Ended Year Ended Net loss before taxes (343,068 ) (101,288 ) (299,540 ) Net loss not subject to taxes (418,027 ) (253,605 ) (244,045 ) Net income (loss) subject to taxes 74,959 152,317 (55,495 ) At applicable statutory tax rates 11,741 28,437 (15,784 ) Permanent differences (3,846 ) (23,179 ) 2,424 Adjustments related to currency differences (360 ) (338 ) 5,847 Valuation allowance and other 292 17,737 7,415 Tax expense (recovery) related to current year 7,827 22,657 (98 )
Reconciliation of Partnership's Total Amount of Unrecognized Tax Benefits	The following is a tabular reconciliation of the Partnership’s total amount of unrecognized tax benefits at the beginning and end of 2019 , 2018 and 2017 : Year Ended Year Ended Year Ended Balance of unrecognized tax benefits as at beginning of the year 1,596 1,410 2,174 Decreases for positions related to prior years — (189 ) (930 ) Increases for positions related to the current year — 375 166 Balance of unrecognized tax benefits as at end of the year 1,596 1,596 1,410

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2019
Supplemental Cash Flow Elements [Abstract]
Schedule of Cash Flow, Supplemental Disclosures	The following is a tabular reconciliation of the Partnership's cash, cash equivalents and restricted cash balances for the periods presented in these consolidated financial statements: As at As at As at 2019 2018 2017 $ $ $ Cash and cash equivalents 199,388 225,040 221,934 Restricted cash (1) 17,798 8,540 28,360 Restricted cash - long-term (1) 89,070 — — 306,256 233,580 250,294 (1) Restricted cash as at December 31, 2019 includes funds held as a guarantee for certain operating expenses, funds for scheduled loan facility repayments, withholding taxes and office lease prepayments. Restricted cash - long-term as at December 31, 2019 includes amounts held in escrow for a shuttle tanker newbuilding yard installment payment. Restricted cash as at December 31, 2018 includes amounts held in escrow as collateral on the Partnership's cross currency swaps, funds for a scheduled loan facility repayment, withholding taxes and office lease prepayments. Restricted cash as at December 31, 2017 includes amounts held in escrow as collateral on the Partnership’s cross currency swaps and funds for certain vessel upgrade costs.
Changes in Non-cash Working Capital Items Related to Operating Activities	The changes in non-cash working capital items related to operating activities for the years ended December 31, 2019 , 2018 and 2017 are as follows: Year Ended Year Ended Year Ended Accounts receivable (57,957 ) 22,320 (54,830 ) Prepaid expenses and other assets 1,115 (2,104 ) (6,618 ) Accounts payable and accrued liabilities 68,219 (32,800 ) 43,113 Due from (to) related parties 1,039 (70,643 ) 51,841 12,416 (83,227 ) 33,506

Total Capital and Net Income _2

Total Capital and Net Income Per Common Unit (Tables)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Summary of Incentive Distribution Rights	Prior to the Merger, when the Partnership’s incentive distribution rights were canceled and ceased to exist, t he general partner was entitled to certain incentive distributions if the amount the Partnership distributed to common unitholders with respect to any quarter exceeded specified target levels shown below: Quarterly Distribution Target Amount (per unit) Unitholders General Partner Minimum quarterly distribution of $0.35 99.24 % 0.76 % Up to $0.4025 99.24 % 0.76 % Above $0.4025 up to $0.4375 86.24 % 13.76 % Above $0.4375 up to $0.525 76.24 % 23.76 % Above $0.525 51.24 % 48.76 %
Schedule of Net Income Per Common Unit	Net Loss Per Common Unit Year Ended December 31, December 31, December 31, Limited partners' interest in net loss (378,770 ) (147,141 ) (339,501 ) Preferred units - periodic accretion — — (2,380 ) Net gain on repurchase of Series C-1 and Series D Preferred Units — — 19,637 Gain on modification of warrants — — 1,495 Limited partners' interest in net loss for basic net loss per common unit (378,770 ) (147,141 ) (320,749 ) Series C-1 Preferred Units - cash distributions — — 12,650 Gain on repurchase of Series C-1 Preferred Units — — (26,994 ) Limited partners' interest in diluted net loss (378,770 ) (147,141 ) (335,093 ) Weighted average number of common units 410,727,035 410,261,239 220,755,937 Dilutive effect of Series C-1 Preferred Units and unit based compensation — — 9,184,183 Common units and common unit equivalents 410,727,035 410,261,239 229,940,120 Limited partner's interest in net loss per common unit - basic (0.92 ) (0.36 ) (1.45 ) - diluted (0.92 ) (0.36 ) (1.46 )
Summary of Issuances of Common Units	The following table summarizes the issuances of common units over the three years ending December 31, 2019 : Date Offering Type Number of Common Units Issued Offering Price Gross Proceeds (i) Net Proceeds Use of Proceeds (in millions of U.S. Dollars) During 2017 Payment-in-kind 6,391,087 (ii) 29.8 29.8 (ii) September 2017 Private 256,000,000 (iii) 640.0 628.1 To strengthen the Partnership's capital structure and to fund the Partnership's existing growth projects. (i) Including the General Partner’s proportionate capital contribution, where applicable. (ii) Common units issued as a payment-in-kind for the distributions on the Partnership's Series C-1 and D Preferred Units and on the Partnership's common units and general partner interest held by subsidiaries of Teekay Corporation and payment-in-kind for interest on the 2016 Teekay Corporation Promissory Note (see note 11g). (iii) In September 2017, as part of the Brookfield Transaction, the Partnership issued to Brookfield 244.0 million common units and the Brookfield Transaction Warrants to purchase 62.4 million common units, for gross proceeds of $610.0 million . In addition, the Partnership issued to Teekay Corporation 12.0 million common units and the Brookfield Transaction Warrants to purchase 3.1 million common units, for gross proceeds of $30.0 million . The net proceeds are exclusive of expenses allocated to the Brookfield Transaction Warrants of $1.4 million .

Investment in Equity Accounte_2

Investment in Equity Accounted Joint Ventures (Tables)	12 Months Ended
	Dec. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Schedule of Aggregated Summarized Financial Information for Equity Method's Investment	The following table presents aggregated summarized financial information assuming a 100% ownership interest in the Partnership’s equity accounted joint ventures. The results included are for the Itajai FPSO joint venture and the Libra Joint Venture. As at December 31, 2019 2018 Current assets 159,045 148,208 Non-current assets 1,122,079 1,189,463 Current liabilities 127,110 139,777 Long-term liabilities 686,371 780,685 Year ended December 31, 2019 2018 2017 Revenues 264,266 264,215 90,662 Operating income 134,321 119,774 43,422 Net income 72,022 78,916 28,884

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Revenues Additional Information (Details) $ in Thousands	Jan. 01, 2018USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in accounting policy	$ 41,697
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in accounting policy	29,400
Accounting Standards Update 2014-09 | Time charters
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change in accounting policy	$ 7,700

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Additional Information - Vessels and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 349,379	$ 372,290	$ 309,975
Interest costs capitalized to vessels and equipment	$ 13,600	11,100	29,600
Shuttle tankers
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	20 years
UMS segment
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	35 years
Towage vessels
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	25 years
Vessels
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 330,200	348,400	286,100
Minimum | Shuttle tanker and towage vessel
Property, Plant and Equipment [Line Items]
Dry docks period	2 years 6 months
Maximum | Shuttle tanker and towage vessel
Property, Plant and Equipment [Line Items]
Dry docks period	5 years
FPSO segment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	20 years
FPSO segment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	25 years
Shuttle tankers
Property, Plant and Equipment [Line Items]
Depreciation and amortization	$ 134,300	$ 155,900	$ 125,600

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Summary of Dry-Docking Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Movement in Property, Plant and Equipment [Roll Forward]
Balance at beginning of the year	$ 4,196,909
Cost incurred for dry-docking	13,546	$ 23,602	$ 17,183
Dry-docking amortization	(349,379)	(372,290)	(309,975)
Write-down / sale of vessels with capitalized dry-dock costs	(332,125)	(223,355)	(318,078)
Balance at end of the year	3,511,758	4,196,909
Dry-docking activity
Movement in Property, Plant and Equipment [Roll Forward]
Balance at beginning of the year	42,538	42,829	49,238
Cost incurred for dry-docking	13,546	23,602	17,183
Dry-docking amortization	(19,146)	(23,893)	(22,870)
Write-down / sale of vessels with capitalized dry-dock costs	0	0	(722)
Balance at end of the year	$ 36,938	$ 42,538	$ 42,829

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Additional Information - Asset Retirement Obligation (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Asset retirement obligation	$ 26.4	$ 24.7

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Additional Information - Employee Pension Plans (Details)	12 Months Ended
	Dec. 31, 2019USD ($)employee	Dec. 31, 2018USD ($)employee	Dec. 31, 2017USD ($)employee	Jan. 01, 2018subsidiary
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan cost recognized	$ 5,200,000	$ 4,500,000	$ 0
Defined Contribution Plan, Number of Employees | employee	288	443	0
Funded status deficiency	$ 300,000	$ 1,500,000	$ 0
Subsidiaries of Teekay Corporation
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Percentage of ownership interest acquired				100.00%
Number of subsidiaries acquired | subsidiary				7

Accounting Pronouncements (Deta

Accounting Pronouncements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Carrying value of operating lease liabilities	$ 42,544
Lease revenue from lease payments of direct financing and sales type leases	858,000	$ 1,720,000	$ 2,396,000
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right of use asset	57,700,000			$ 19,400,000
Carrying value of operating lease liabilities	$ 57,700,000			$ 19,400,000

Fair Value Measurements and F_3

Fair Value Measurements and Financial Instruments - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Restricted cash	$ 0	$ 1,200,000
FPSO segment
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Estimated market participant rate	10.00%
Arendal Spirit UMS
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Estimated market participant rate	10.00%

Fair Value Measurements and F_4

Fair Value Measurements and Financial Instruments - Estimated Fair Value and Carrying Value (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Reported Value Measurement | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations related to finance leases (note 14c)	$ 21,453	$ 0
Reported Value Measurement | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents and restricted cash	306,256	233,580
Estimate of Fair Value Measurement | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Obligations related to finance leases (note 14c)	23,800	0
Estimate of Fair Value Measurement | Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents and restricted cash	306,256	233,580
Interest rate swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	(163,972)
Interest rate swaps | Reported Value Measurement | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	163,972	107,074
Interest rate swaps | Estimate of Fair Value Measurement | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	163,972	107,074
Cross currency swap agreement | Reported Value Measurement | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cross currency swap agreement	0	(4,538)
Cross currency swap agreement | Estimate of Fair Value Measurement | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cross currency swap agreement	0	(4,538)
Foreign currency forward contracts | Reported Value Measurement | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	575	(4,650)
Foreign currency forward contracts | Estimate of Fair Value Measurement | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	575	(4,650)
Vessels Held For Sale | Reported Value Measurement | Fair Value, Measurements, Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property, plant, and equipment	15,374	0
Vessels Held For Sale | Estimate of Fair Value Measurement | Fair Value, Measurements, Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property, plant, and equipment	15,374	0
Vessels and Equipment | Reported Value Measurement | Fair Value, Measurements, Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property, plant, and equipment	176,577	0
Vessels and Equipment | Estimate of Fair Value Measurement | Fair Value, Measurements, Nonrecurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Property, plant, and equipment	176,577	0
Public | Reported Value Measurement | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	(1,067,740)	(1,027,696)
Public | Estimate of Fair Value Measurement | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	(1,069,204)	(977,917)
Private | Reported Value Measurement | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	(2,111,210)	(2,070,046)
Private | Estimate of Fair Value Measurement | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	(2,136,315)	(2,082,316)
Affiliated entity | Reported Value Measurement | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Due to related parties - current (notes 11c and 11j)	(20,000)	(125,000)
Affiliated entity | Estimate of Fair Value Measurement | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Due to related parties - current (notes 11c and 11j)	$ (19,781)	$ (123,025)

Fair Value Measurements and F_5

Fair Value Measurements and Financial Instruments - Summary of Partnership's Financing Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Payment activity | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
Direct financing leases	$ 3,875	$ 4,793

Segment Reporting - Additional

Segment Reporting - Additional Information (Details)	12 Months Ended
	Dec. 31, 2019vesselsegmentMaintenanceAndSafety
Segment Reporting Information [Line Items]
Number of reportable segments | segment	6
Number of chartered conventional tankers | vessel	2
UMS Segment
Segment Reporting Information [Line Items]
Number of units for maintenance and safety | MaintenanceAndSafety	1

Segment Reporting - Revenues an

Segment Reporting - Revenues and Percentage of Consolidated Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, Major Customer [Line Items]
Revenues	$ 161,427	$ 220,012	$ 44,584
Revenue | Customer Concentration Risk | Royal Dutch Shell Plc
Revenue, Major Customer [Line Items]
Revenues	$ 311,300	$ 327,600	$ 338,200
Percentage of consolidated revenue	25.00%	23.00%	31.00%
Revenue | Customer Concentration Risk | Petroleo Brasileiro S.A.
Revenue, Major Customer [Line Items]
Revenues		$ 254,800	$ 190,700
Percentage of consolidated revenue		18.00%	17.00%
Revenue | Customer Concentration Risk | Equinor ASA (formerly Statoil ASA)
Revenue, Major Customer [Line Items]
Revenues	$ 170,800	$ 182,100	$ 114,500
Percentage of consolidated revenue	13.00%	13.00%	10.00%
Revenue | Customer Concentration Risk | Premier Oil
Revenue, Major Customer [Line Items]
Revenues			$ 113,500
Percentage of consolidated revenue			10.00%

Segment Reporting - Segment Res

Segment Reporting - Segment Results as Presented in Consolidated Financial Statements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 1,268,000	$ 1,416,424	$ 1,110,284
Voyage expenses	(129,910)	(151,808)	(99,444)
Vessel operating expenses	(426,951)	(437,671)	(353,564)
Time-charter hire expenses	(44,427)	(52,616)	(80,315)
General and administrative	(76,245)	(65,427)	(62,249)
Restructuring charge	0	(1,520)	(2,664)
Realized gain on foreign currency forward contracts	(5,054)	(1,228)	900
Adjusted EBITDA From Equity-Accounted Vessels	97,849	92,637	33,360
Adjusted EBITDA Attributable to Non-Controlling Interests	(11,364)	(16,270)	(23,914)
Adjusted EBITDA	671,898	782,521	522,394
Equity income	32,794	39,458	14,442
Investment in joint ventures	234,627	212,202	169,875
Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs(3)	201,439	233,736	533,260
Expenditures for dry docking	13,546	23,602	17,183
Operating Segments | FPSO Segment
Segment Reporting Information [Line Items]
Revenues	492,658	533,186	458,388
Voyage expenses	0	0	0
Vessel operating expenses	(227,873)	(214,623)	(149,153)
Time-charter hire expenses	0	0	0
General and administrative	(40,846)	(34,052)	(33,046)
Restructuring charge		(1,520)	(450)
Realized gain on foreign currency forward contracts	0	0	0
Adjusted EBITDA From Equity-Accounted Vessels	97,849	92,637	33,360
Adjusted EBITDA Attributable to Non-Controlling Interests	0	0	0
Adjusted EBITDA	321,788	375,628	309,099
Equity income	32,794	39,458	14,442
Investment in joint ventures	234,627	212,202	169,875
Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs(3)	8,284	54,371	193,817
Expenditures for dry docking	0	0	0
Operating Segments | Shuttle Tanker Segment
Segment Reporting Information [Line Items]
Revenues	549,587	636,413	536,852
Voyage expenses	(86,519)	(109,796)	(80,964)
Vessel operating expenses	(126,433)	(149,226)	(129,517)
Time-charter hire expenses	(40,108)	(36,421)	(62,899)
General and administrative	(20,788)	(21,763)	(17,425)
Restructuring charge		0	(210)
Realized gain on foreign currency forward contracts	0	0	0
Adjusted EBITDA From Equity-Accounted Vessels	0	0	0
Adjusted EBITDA Attributable to Non-Controlling Interests	(10,864)	(15,593)	(23,035)
Adjusted EBITDA	264,875	303,614	222,802
Equity income	0	0	0
Investment in joint ventures	0	0	0
Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs(3)	185,156	147,540	216,157
Expenditures for dry docking	11,902	22,135	16,323
Operating Segments | FSO Segment
Segment Reporting Information [Line Items]
Revenues	140,117	136,557	66,901
Voyage expenses	(800)	(769)	(1,172)
Vessel operating expenses	(42,597)	(42,913)	(25,241)
Time-charter hire expenses	0	0	0
General and administrative	(4,006)	(2,174)	(1,864)
Restructuring charge		0	0
Realized gain on foreign currency forward contracts	0	0	0
Adjusted EBITDA From Equity-Accounted Vessels	0	0	0
Adjusted EBITDA Attributable to Non-Controlling Interests	(500)	(677)	(879)
Adjusted EBITDA	92,214	90,024	37,745
Equity income	0	0	0
Investment in joint ventures	0	0	0
Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs(3)	6,967	6,987	88,039
Expenditures for dry docking	0	0	199
Operating Segments | UMS Segment
Segment Reporting Information [Line Items]
Revenues	2,940	36,536	4,236
Voyage expenses	(76)	(47)	(1,152)
Vessel operating expenses	(1,216)	(3,679)	(33,656)
Time-charter hire expenses	0	0	0
General and administrative	(6,100)	(3,547)	(5,068)
Restructuring charge		0	(2,004)
Realized gain on foreign currency forward contracts	0	0	0
Adjusted EBITDA From Equity-Accounted Vessels	0	0	0
Adjusted EBITDA Attributable to Non-Controlling Interests	0	0	0
Adjusted EBITDA	(4,452)	29,263	(37,644)
Equity income	0	0	0
Investment in joint ventures	0	0	0
Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs(3)	922	0	3,931
Expenditures for dry docking	0	0	0
Operating Segments | Towage Segment
Segment Reporting Information [Line Items]
Revenues	74,726	53,327	38,771
Voyage expenses	(37,530)	(28,925)	(17,727)
Vessel operating expenses	(28,832)	(27,346)	(21,074)
Time-charter hire expenses	0	0	(925)
General and administrative	(4,401)	(3,531)	(4,486)
Restructuring charge		0	0
Realized gain on foreign currency forward contracts	0	0	0
Adjusted EBITDA From Equity-Accounted Vessels	0	0	0
Adjusted EBITDA Attributable to Non-Controlling Interests	0	0	0
Adjusted EBITDA	3,963	(6,475)	(5,441)
Equity income	0	0	0
Investment in joint ventures	0	0	0
Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs(3)	110	24,838	31,316
Expenditures for dry docking	1,644	1,467	661
Operating Segments | Conventional Tanker Segment
Segment Reporting Information [Line Items]
Revenues	7,972	21,325	14,022
Voyage expenses	(4,985)	(12,453)	(359)
Vessel operating expenses	0	0	10
Time-charter hire expenses	(4,319)	(16,195)	(16,491)
General and administrative	(104)	(360)	(360)
Restructuring charge		0	0
Realized gain on foreign currency forward contracts	0	0	0
Adjusted EBITDA From Equity-Accounted Vessels	0	0	0
Adjusted EBITDA Attributable to Non-Controlling Interests	0	0	0
Adjusted EBITDA	(1,436)	(7,683)	(3,178)
Equity income	0	0	0
Investment in joint ventures	0	0	0
Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs(3)	0	0	0
Expenditures for dry docking	0	0	0
Eliminations
Segment Reporting Information [Line Items]
Revenues	0	(920)	(8,886)
Voyage expenses	0	182	1,930
Vessel operating expenses	0	116	5,067
Time-charter hire expenses	0	0	0
General and administrative	0	0	0
Restructuring charge		0	0
Realized gain on foreign currency forward contracts	(5,054)	(1,228)	900
Adjusted EBITDA From Equity-Accounted Vessels	0	0	0
Adjusted EBITDA Attributable to Non-Controlling Interests	0	0	0
Adjusted EBITDA	(5,054)	(1,850)	(989)
Equity income	0	0	0
Investment in joint ventures	0	0	0
Expenditures for vessels and equipment, including advances on newbuilding contracts and conversion costs(3)	0	0	0
Expenditures for dry docking	$ 0	$ 0	$ 0

Segment Reporting - Segment R_2

Segment Reporting - Segment Results as Presented in Consolidated Financial Statements (Footnote) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Nov. 30, 2018	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenue related to settlement agreement	$ 55
Shuttle tanker segment
Segment Reporting Information [Line Items]
Revenue related to settlement agreement		$ 55
UMS segment
Segment Reporting Information [Line Items]
Revenue related to settlement agreement		$ 36.5

Segment Reporting - Adjusted EB

Segment Reporting - Adjusted EBITDA to Net Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 671,898	$ 782,521	$ 522,394
Depreciation and amortization	349,379	372,290	309,975
Write-down / sale of vessels with capitalized dry-dock costs	(332,125)	(223,355)	(318,078)
Interest expense (notes 8, 11 and 12)	(205,709)	(199,395)	(154,890)
Interest income	5,111	3,598	2,707
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(80,141)	14,036	(43,753)
Foreign currency exchange gain (loss) (note 12)	2,193	(9,413)	(14,006)
Losses on debt repurchases (notes 8 and 11k)	0	(55,479)	(3,102)
Other (expense) income - net	(1,225)	(4,602)	14,167
Expenses and losses relating to equity accounted investments	(65,055)	(53,179)	(18,918)
Adjusted EBITDA Attributable to Non-Controlling Interests	11,364	16,270	23,914
Net loss before taxes	(343,068)	(101,288)	(299,540)
Income Tax Expense (Benefit)	(7,827)	(22,657)	98
Net loss	(350,895)	(123,945)	(299,442)
FPSO Segment
Segment Reporting Information [Line Items]
Depreciation and amortization	145,900	145,500	143,600
Write-down / sale of vessels with capitalized dry-dock costs	(227,400)	(180,200)	(265,200)
Shuttle tankers
Segment Reporting Information [Line Items]
Depreciation and amortization	134,300	155,900	125,600
Write-down / sale of vessels with capitalized dry-dock costs	(900)	(43,200)	(51,700)
FSO Segment
Segment Reporting Information [Line Items]
Depreciation and amortization	41,700	44,100	19,400
Write-down / sale of vessels with capitalized dry-dock costs	11,200		(1,100)
UMS
Segment Reporting Information [Line Items]
Depreciation and amortization	6,600	6,600	6,600
Write-down / sale of vessels with capitalized dry-dock costs	(115,000)
Towage Segment
Segment Reporting Information [Line Items]
Depreciation and amortization	20,900	20,300	15,600
Eliminations
Segment Reporting Information [Line Items]
Adjusted EBITDA	(5,054)	(1,850)	(989)
Depreciation and amortization		(100)	(800)
Adjusted EBITDA Attributable to Non-Controlling Interests	$ 0	$ 0	$ 0

Segment Reporting - Reconciliat

Segment Reporting - Reconciliation of Total Segment Assets to Total Assets Presented in Accompanying Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Consolidated total assets	$ 4,923,267	$ 5,312,052
Operating Segments | FPSO segment
Segment Reporting Information [Line Items]
Consolidated total assets	1,913,420	2,279,277
Operating Segments | Shuttle tanker segment
Segment Reporting Information [Line Items]
Consolidated total assets	1,778,073	1,684,887
Operating Segments | FSO segment
Segment Reporting Information [Line Items]
Consolidated total assets	425,694	463,647
Operating Segments | UMS segment
Segment Reporting Information [Line Items]
Consolidated total assets	101,009	220,509
Operating Segments | Towage segment
Segment Reporting Information [Line Items]
Consolidated total assets	390,895	419,000
Operating Segments | Conventional tanker segment
Segment Reporting Information [Line Items]
Consolidated total assets	0	4,259
Segment Reconciling Items | Cash and cash equivalents and restricted cash
Segment Reporting Information [Line Items]
Consolidated total assets	306,256	233,580
Segment Reconciling Items | Other assets
Segment Reporting Information [Line Items]
Consolidated total assets	$ 7,920	$ 6,893

Revenues - Narrative (Details)

Revenues - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)contractvessel	Dec. 31, 2018USD ($)vessel	Dec. 31, 2017USD ($)
Disaggregation of Revenue [Line Items]
Number of primary forms of contracts | contract	5
Time charters, cancellation notice period	2 years
Time charters, term of allowable extension (up to)	10 years
Term of master agreement	1 year
Term of renewal	1 year
Duration of a single voyage (less than)	14 days
Duration of time charter contracts (or more)	1 year
Contract with customer, liability, revenue recognized | $	$ 53.1
Capitalized contract cost, amortization | $	$ 20.9	$ 19.7	$ 24.1
Voyage charters
Disaggregation of Revenue [Line Items]
Duration of a single voyage (less than)	3 months
Shuttle tankers | Management fees and other
Disaggregation of Revenue [Line Items]
Number of vessels		2
Shuttle tankers | Shuttle Tanker Segment
Disaggregation of Revenue [Line Items]
Number of vessels	6	13
Shuttle tankers | Shuttle Tanker Segment | Time charters | Canada
Disaggregation of Revenue [Line Items]
Number of vessels	4
Shuttle tankers | Shuttle Tanker Segment | Time charters | Brazil
Disaggregation of Revenue [Line Items]
Number of vessels	4
Shuttle tankers | Shuttle tankers | Management fees and other
Disaggregation of Revenue [Line Items]
Number of vessels		2
FPSO units | FPSO Segment | Management fees and other
Disaggregation of Revenue [Line Items]
Number of vessels	3	3
FSO units | FSO Segment | Time charters
Disaggregation of Revenue [Line Items]
Number of vessels	3
FSO units | FSO Segment | Management fees and other
Disaggregation of Revenue [Line Items]
Number of vessels	1	1
Minimum
Disaggregation of Revenue [Line Items]
Time charters, FSO units, term of allowable extension	5 years
Maximum
Disaggregation of Revenue [Line Items]
Time charters, FSO units, term of allowable extension	12 years

Revenues - Schedule of Partners

Revenues - Schedule of Partnership Revenue (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Nov. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenue related to settlement agreement	$ 55,000
Amount due to the Partnership		$ 96,000
Amount payable in late 2020		22,000
Amount payable in late 2021		$ 19,000
Payables to be reduced (as a percentage)		40.00%
Revenues		$ 1,268,000	$ 1,416,424	$ 1,110,284
FPSO contracts
Segment Reporting Information [Line Items]
Revenues		421,363	481,700	458,388
Contracts of affreightment
Segment Reporting Information [Line Items]
Revenues		188,277	198,448	170,703
Time charters
Segment Reporting Information [Line Items]
Revenues		414,857	410,237	345,254
Bareboat charters
Segment Reporting Information [Line Items]
Revenues		49,789	62,142	88,864
Voyage charters
Segment Reporting Information [Line Items]
Revenues		107,013	101,759	47,075
Management fees and other
Segment Reporting Information [Line Items]
Revenues		86,701	162,138
Eliminations
Segment Reporting Information [Line Items]
Revenues		0	(920)	(8,886)
Eliminations | FPSO contracts
Segment Reporting Information [Line Items]
Revenues		0	0	0
Eliminations | Contracts of affreightment
Segment Reporting Information [Line Items]
Revenues		0	0	0
Eliminations | Time charters
Segment Reporting Information [Line Items]
Revenues		0	0	0
Eliminations | Bareboat charters
Segment Reporting Information [Line Items]
Revenues		0	0	0
Eliminations | Voyage charters
Segment Reporting Information [Line Items]
Revenues		0	(920)	(8,886)
Eliminations | Management fees and other
Segment Reporting Information [Line Items]
Revenues		0	0
FPSO Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues		492,658	533,186	458,388
FPSO Segment | Operating Segments | FPSO contracts
Segment Reporting Information [Line Items]
Revenues		421,363	481,700	458,388
FPSO Segment | Operating Segments | Contracts of affreightment
Segment Reporting Information [Line Items]
Revenues		0	0	0
FPSO Segment | Operating Segments | Time charters
Segment Reporting Information [Line Items]
Revenues		0	0	0
FPSO Segment | Operating Segments | Bareboat charters
Segment Reporting Information [Line Items]
Revenues		0	0	0
FPSO Segment | Operating Segments | Voyage charters
Segment Reporting Information [Line Items]
Revenues		0	0	0
FPSO Segment | Operating Segments | Management fees and other
Segment Reporting Information [Line Items]
Revenues		71,295	51,486
Shuttle tanker segment
Segment Reporting Information [Line Items]
Revenue related to settlement agreement		55,000
Shuttle tanker segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues		549,587	636,413	536,852
Shuttle tanker segment | Operating Segments | FPSO contracts
Segment Reporting Information [Line Items]
Revenues		0	0	0
Shuttle tanker segment | Operating Segments | Contracts of affreightment
Segment Reporting Information [Line Items]
Revenues		188,277	198,448	170,703
Shuttle tanker segment | Operating Segments | Time charters
Segment Reporting Information [Line Items]
Revenues		293,095	294,112	284,281
Shuttle tanker segment | Operating Segments | Bareboat charters
Segment Reporting Information [Line Items]
Revenues		34,611	44,759	69,568
Shuttle tanker segment | Operating Segments | Voyage charters
Segment Reporting Information [Line Items]
Revenues		24,315	28,027	12,300
Shuttle tanker segment | Operating Segments | Management fees and other
Segment Reporting Information [Line Items]
Revenues		9,289	71,067
FSO segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues		140,117	136,557	66,901
FSO segment | Operating Segments | FPSO contracts
Segment Reporting Information [Line Items]
Revenues		0	0	0
FSO segment | Operating Segments | Contracts of affreightment
Segment Reporting Information [Line Items]
Revenues		0	0	0
FSO segment | Operating Segments | Time charters
Segment Reporting Information [Line Items]
Revenues		121,762	116,125	47,605
FSO segment | Operating Segments | Bareboat charters
Segment Reporting Information [Line Items]
Revenues		15,178	17,383	19,296
FSO segment | Operating Segments | Voyage charters
Segment Reporting Information [Line Items]
Revenues		0	0	0
FSO segment | Operating Segments | Management fees and other
Segment Reporting Information [Line Items]
Revenues		3,177	3,049
UMS Segment
Segment Reporting Information [Line Items]
Revenue related to settlement agreement		36,500
UMS Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues		2,940	36,536	4,236
UMS Segment | Operating Segments | FPSO contracts
Segment Reporting Information [Line Items]
Revenues		0	0	0
UMS Segment | Operating Segments | Contracts of affreightment
Segment Reporting Information [Line Items]
Revenues		0	0	0
UMS Segment | Operating Segments | Time charters
Segment Reporting Information [Line Items]
Revenues		0	0	4,236
UMS Segment | Operating Segments | Bareboat charters
Segment Reporting Information [Line Items]
Revenues		0	0	0
UMS Segment | Operating Segments | Voyage charters
Segment Reporting Information [Line Items]
Revenues		0	0	0
UMS Segment | Operating Segments | Management fees and other
Segment Reporting Information [Line Items]
Revenues		2,940	36,536
Towage segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues		74,726	53,327	38,771
Towage segment | Operating Segments | FPSO contracts
Segment Reporting Information [Line Items]
Revenues		0	0	0
Towage segment | Operating Segments | Contracts of affreightment
Segment Reporting Information [Line Items]
Revenues		0	0	0
Towage segment | Operating Segments | Time charters
Segment Reporting Information [Line Items]
Revenues		0	0	0
Towage segment | Operating Segments | Bareboat charters
Segment Reporting Information [Line Items]
Revenues		0	0	0
Towage segment | Operating Segments | Voyage charters
Segment Reporting Information [Line Items]
Revenues		74,726	53,327	38,771
Towage segment | Operating Segments | Management fees and other
Segment Reporting Information [Line Items]
Revenues		0	0
Conventional Tanker Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues		7,972	21,325	14,022
Conventional Tanker Segment | Operating Segments | FPSO contracts
Segment Reporting Information [Line Items]
Revenues		0	0	0
Conventional Tanker Segment | Operating Segments | Contracts of affreightment
Segment Reporting Information [Line Items]
Revenues		0	0	0
Conventional Tanker Segment | Operating Segments | Time charters
Segment Reporting Information [Line Items]
Revenues		0	0	9,132
Conventional Tanker Segment | Operating Segments | Bareboat charters
Segment Reporting Information [Line Items]
Revenues		0	0	0
Conventional Tanker Segment | Operating Segments | Voyage charters
Segment Reporting Information [Line Items]
Revenues		7,972	21,325	$ 4,890
Conventional Tanker Segment | Operating Segments | Management fees and other
Segment Reporting Information [Line Items]
Revenues		$ 0	$ 0

Revenues Revenue - Schedule of

Revenues Revenue - Schedule of Lease and Non-Lease Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Lease revenue from lease payments of direct financing and sales type leases	$ 858	$ 1,720	$ 2,396
Lease revenue from lease payments of operating leases	1,079,356	1,175,073	1,028,123
Lease Revenue	1,106,573	1,196,412	1,065,700
Non-lease revenue	161,427	220,012	44,584
Revenues	1,268,000	1,416,424	1,110,284
Variable Lease Payments Cost Reimbursements
Disaggregation of Revenue [Line Items]
Variable Lease, Income	11,314	19,316	33,159
Variable Lease Payments
Disaggregation of Revenue [Line Items]
Variable Lease, Income	15,045	303	2,022
Sales-Type or Direct Financing
Disaggregation of Revenue [Line Items]
Non-lease revenue	0	4,547	5,813
Management fees and other
Disaggregation of Revenue [Line Items]
Non-lease revenue	86,701	162,138	0
Revenues	86,701	162,138
Voyage charters
Disaggregation of Revenue [Line Items]
Non-lease revenue	74,726	53,327	38,771
Revenues	$ 107,013	$ 101,759	$ 47,075

Revenues - Schedule of Contract

Revenues - Schedule of Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018
Revenue from Contract with Customer [Abstract]
Contract assets, non-current	$ 3,816		$ 7,926
Contract assets, current	74,830		62,295
Contract assets	78,646		70,221
Deferred revenues (note 5)	53,728	$ 55,750	55,750
Contract liabilities, non-current	84,077		145,852
Contract liabilities	$ 137,805		$ 201,602

Revenues - Schedule of Balances

Revenues - Schedule of Balances of Assets Recognized from the Costs to Fulfill Contract with Customer (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Capitalized Contract Cost [Line Items]
Capitalized contract cost, net	$ 61,847	$ 90,521	$ 62,340
Pre-operational costs
Capitalized Contract Cost [Line Items]
Capitalized contract cost, net	12,836	24,031	4,522
Offshore asset mobilization costs
Capitalized Contract Cost [Line Items]
Capitalized contract cost, net	35,632	51,302	57,818
Vessel repositioning costs
Capitalized Contract Cost [Line Items]
Capitalized contract cost, net	$ 13,379	$ 15,188	$ 0

Goodwill and In-Process Reven_2

Goodwill and In-Process Revenue Contracts (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 129,145,000	$ 129,145,000
Amortization of in-process revenue contract (note 6b)	(15,062,000)	(35,219,000)	$ (12,745,000)
Shuttle tanker segment
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	127,100,000	127,100,000
Goodwill impairment	0	0	0
Towage segment
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill	2,000,000	2,000,000
Goodwill impairment	$ 0	$ 0	$ 0

Accrued Liabilities (Details)

Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Interest including interest rate swaps	$ 48,047	$ 44,887
Payroll and benefits	36,807	34,828
Audit, legal, contingency and other general expenses	32,372	21,626
Voyage and vessel expenses	19,829	25,475
Income and other tax payable	3,921	3,080
Total accrued liabilities	$ 140,976	$ 129,896

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total principal	$ 3,228,654	$ 3,142,177
Less debt issuance costs and other	(49,704)	(44,435)
Total debt	3,178,950	3,097,742
Less current portion	(353,238)	(554,336)
Long-term portion	2,825,712	2,543,406
Revolving credit facility | U.S. Dollar-denominated Revolving Credit Facilities due through 2024 [Member]
Debt Instrument [Line Items]
Total principal	513,200	523,125
Term loans | U.S. Dollar-denominated Term Loans due through 2032
Debt Instrument [Line Items]
Total principal	1,357,236	1,388,107
Term loans | U.S. Dollar-denominated Term Loans due through 2032
Debt Instrument [Line Items]
Total principal	1,400,000
Term loans | U.S. Dollar-denominated Term Loan due through 2021
Debt Instrument [Line Items]
Total principal	42,073	55,018
Bonds | U.S. Dollar Bonds due through 2024
Debt Instrument [Line Items]
Total principal	1,075,000	1,024,816
Bonds | U.S. Dollar Non-Public Bonds due through 2027
Debt Instrument [Line Items]
Total principal	241,145	141,158
Bonds | Norwegian Krone Bonds due through 2019
Debt Instrument [Line Items]
Total principal	$ 0	$ 9,953

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information - Revolvers (Details)	12 Months Ended
	Dec. 31, 2019USD ($)credit_facilityvessel	Dec. 31, 2018USD ($)credit_facilityvessel	Mar. 31, 2018USD ($)
Debt Instrument [Line Items]
Amount reduced under revolving credit facilities, 2020	$ 354,400,000
Amount reduced under revolving credit facilities, 2021	315,700,000
Amount reduced under revolving credit facilities, 2022	577,700,000
Amount reduced under revolving credit facilities, 2023	1,113,300,000
Amount reduced under revolving credit facilities, 2024	$ 453,200,000
Revolving credit facility
Debt Instrument [Line Items]
Number of revolving credit facilities | credit_facility	2	2
Revolving credit facilities borrowing capacity	$ 513,200,000	$ 523,100,000	$ 125,000,000
Amount reduced under revolving credit facilities, 2020	73,600,000
Amount reduced under revolving credit facilities, 2021	73,600,000
Amount reduced under revolving credit facilities, 2022	103,600,000
Amount reduced under revolving credit facilities, 2023	53,600,000
Amount reduced under revolving credit facilities, 2024	$ 208,800,000
Revolving credit facility | Partnership’s vessels, together with other related security
Debt Instrument [Line Items]
Number of vessels | vessel	17	19
Revolving credit facility | Teekay Shuttle Tankers L.L.C.
Debt Instrument [Line Items]
Minimum liquidity (greater of)	$ 35,000,000
Maximum net debt to total capitalization ratio required to maintain (as a percent)	75.00%
Revolving credit facility | Teekay Shuttle Tankers L.L.C. | Minimum
Debt Instrument [Line Items]
Minimum liquidity (percent) (greater of)	5.00%
Revolving credit facility | Guaranteed by partnership and subsidiaries
Debt Instrument [Line Items]
Number of revolving credit facilities | credit_facility	1
Minimum liquidity (greater of)	$ 75,000,000
Revolving credit facility | Guaranteed by partnership and subsidiaries | Minimum
Debt Instrument [Line Items]
Maturity period	6 months
Minimum liquidity (percent) (greater of)	5.00%
Revolving credit facility | Teekay Shuttle Tankers L.L.C.
Debt Instrument [Line Items]
Maturity period	6 months

Long-Term Debt - Additional I_2

Long-Term Debt - Additional Information - Term Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)subsidiaryterm_loanvesseltankertranche	Dec. 31, 2018USD ($)term_loanvessel	Oct. 31, 2019USD ($)
Debt Instrument [Line Items]
Number of subsidiaries with outstanding term loans guaranteed | subsidiary	2
Number of outstanding term loans | term_loan	1	1
Aggregate principal amount	$ 3,228,654	$ 3,142,177
Carrying amount of debt	3,178,950	3,097,742
U.S. Dollar-denominated Term Loan due through 2021 | Guarantee of indebtedness of others
Debt Instrument [Line Items]
Aggregate principal amount	21,000
U.S. Dollar-denominated Term Loan due through 2021 | Guarantee of indebtedness of others | Joint venture
Debt Instrument [Line Items]
Aggregate principal amount	$ 21,000
Term Loan for Shuttle Tanker New Buildings
Debt Instrument [Line Items]
Interest rate on convertible promissory note (as a percent)	4.55%
Carrying amount of debt	$ 79,200
Number of tranches | tranche	1
Term loans | U.S. Dollar-denominated Term Loans due through 2032
Debt Instrument [Line Items]
Aggregate principal amount	$ 1,400,000
Term loans | U.S. Dollar-denominated Term Loan due through 2021
Debt Instrument [Line Items]
Aggregate principal amount	42,073	55,018
Term loans | U.S. Dollar-denominated Term Loans due through 2032
Debt Instrument [Line Items]
Aggregate principal amount	$ 1,357,236	$ 1,388,107
Long-term debt | Senior Unsecured Green Bond
Debt Instrument [Line Items]
Debt instrument, face amount			$ 125,000
Long-term debt | U.S. Dollar-denominated Term Loan due through 2021
Debt Instrument [Line Items]
Number of vessels | tanker	2
Teekay Offshore
Debt Instrument [Line Items]
Ownership interest percentage	50.00%
Teekay Offshore | Long-term debt | U.S. Dollar-denominated Term Loan due through 2021 | Guarantee of indebtedness of others
Debt Instrument [Line Items]
Ownership interest percentage	50.00%
Shuttle Tanker Segment | Shuttle tankers
Debt Instrument [Line Items]
Number of vessels | vessel	6	13
Shuttle Tanker Segment | Term loans | Shuttle tankers
Debt Instrument [Line Items]
Number of vessels | vessel	3	3
Shuttle Tanker Segment | Term loans | Shutter Tanker New Buildings
Debt Instrument [Line Items]
Number of vessels | vessel	4	4
FSO Segment | Term loans | FSO units
Debt Instrument [Line Items]
Number of vessels | vessel	2	2
FPSO Segment | Term loans | FPSO units
Debt Instrument [Line Items]
Number of vessels | vessel	2	3
Towage Segment | Term loans | Towing and offshore installation vessels
Debt Instrument [Line Items]
Number of vessels | vessel	10	10

Long-Term Debt - Additional I_3

Long-Term Debt - Additional Information - Bonds (Details)	Jul. 02, 2018USD ($)	Oct. 31, 2019USD ($)	Jul. 31, 2018USD ($)	Nov. 30, 2013USD ($)vessel	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Dec. 31, 2018USD ($)	Aug. 31, 2017USD ($)	Feb. 28, 2015USD ($)
Debt Instrument [Line Items]
Carrying amount of debt					$ 3,178,950,000		$ 3,097,742,000
Long-term portion					2,825,712,000		2,543,406,000
Aggregate principal amount					3,228,654,000		3,142,177,000
Long-term debt | Senior Unsecured Green Bond
Debt Instrument [Line Items]
Debt instrument, face amount		$ 125,000,000
Marginal rate added for interest paid (as a percent)		6.50%
Long-term debt | Senior Bonds US
Debt Instrument [Line Items]
Debt instrument, face amount						$ 120,000,000
Carrying amount of debt					119,000,000		0
Interest rate, percentage						7.107%
Bonds | Five-Year Senior Unsecured Bonds Maturing July 2023
Debt Instrument [Line Items]
Debt instrument, face amount	$ 700,000,000		$ 700,000,000
Carrying amount of debt					700,000,000
Debt instrument term (in years)	5 years		5 years
Interest rate, percentage	8.50%		8.50%
Bonds | Senior Bonds due in June 2024
Debt Instrument [Line Items]
Debt instrument, face amount									$ 30,000,000
Carrying amount of debt					$ 13,600,000		17,200,000
Interest rate, percentage					4.27%
Bonds | 10-Year Senior Secured Bonds
Debt Instrument [Line Items]
Debt instrument, face amount				$ 174,200,000
Carrying amount of debt					$ 108,600,000		123,900,000
Debt instrument term (in years)				10 years
Number of vessels | vessel				2
Interest rate, percentage				4.96%
Bonds | Senior Unsecured Bonds due in August 2022
Debt Instrument [Line Items]
Debt instrument, face amount								$ 250,000,000
Aggregate principal amount					250,000,000		250,000,000
Interest rate, percentage								7.125%
Brookfield | Bonds | Five-Year Senior Unsecured Bonds Maturing July 2023
Debt Instrument [Line Items]
Debt instrument, face amount	$ 500,000,000
Long-term portion					$ 423,600,000		$ 475,000,000

Long-Term Debt - Additional I_4

Long-Term Debt - Additional Information - Other (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)term_loancredit_facilitytranche	Dec. 31, 2018USD ($)term_loancredit_facility
Debt Instrument [Line Items]
Debt instrument, face amount	$ 3,178,950	$ 3,097,742
Weighted-average interest rate	4.30%	5.10%
Aggregate principal repayments, 2020	$ 354,400
Aggregate principal repayments, 2021	315,700
Aggregate principal repayments, 2022	577,700
Aggregate principal repayments, 2023	1,113,300
Aggregate principal repayments, 2024	453,200
Aggregate principal repayments, thereafter	$ 414,400
Number of outstanding term loans | term_loan	1	1
Revolving credit facility
Debt Instrument [Line Items]
Aggregate principal repayments, 2020	$ 73,600
Aggregate principal repayments, 2021	73,600
Aggregate principal repayments, 2022	103,600
Aggregate principal repayments, 2023	53,600
Aggregate principal repayments, 2024	$ 208,800
Number of credit facilities | credit_facility	2	2
ALP Maritime Services B.V.
Debt Instrument [Line Items]
Debt instrument, face amount	$ 71,600
Number of tranches | tranche	1
Fixed interest rate	2.93%
Interest rate swaps | LIBOR | Minimum
Debt Instrument [Line Items]
Marginal rate added for interest paid (as a percent)	0.90%	0.90%
Interest rate swaps | LIBOR | Maximum
Debt Instrument [Line Items]
Marginal rate added for interest paid (as a percent)	4.30%	4.30%
Collateralized Debt Obligations | Revolving credit facility
Debt Instrument [Line Items]
Number of outstanding term loans | credit_facility	2
Collateralized Debt Obligations | Term loan
Debt Instrument [Line Items]
Number of outstanding term loans | credit_facility	7
Collateralized Debt Obligations | Minimum
Debt Instrument [Line Items]
Asset value to outstanding drawn principal balance ratio	100.00%
Vessel values to drawn principal balance ratios	126.00%
Collateralized Debt Obligations | Maximum
Debt Instrument [Line Items]
Asset value to outstanding drawn principal balance ratio	150.00%
Vessel values to drawn principal balance ratios	501.00%

Leases - Charters-out (Details)

Leases - Charters-out (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Operating Leases [Line Items]
Accumulated depreciation	$ 1,666,582	$ 1,634,394
At cost, less accumulated depreciation of $1,666,582 (December 31, 2018 - $1,634,394)	3,511,758	4,196,909
Future Minimum Payments Receivable:
Revenues receivable - 2020	743,600
January to December 2021	645,200
January to December 2022	560,000
Revenues receivable - 2023	526,900
Revenues receivable - 2024	275,100
Revenues receivable - Thereafter	698,100
Payments to be received	3,400,000
Property Available for Operating Lease
Schedule Of Operating Leases [Line Items]
Operating leases cost		4,300,000
Operating leases accumulated depreciation		1,100,000
Operating leases carrying amount of the vessels		$ 3,200,000
Future Minimum Payments Receivable:
Revenues receivable - 2020	704,300
January to December 2021	590,700
January to December 2022	512,500
Revenues receivable - 2023	299,300
Revenues receivable - 2024	133,600
Revenues receivable - Thereafter	622,200
Payments to be received	2,900,000
Assets Leased to Others
Schedule Of Operating Leases [Line Items]
Vessels chartered out	3,800,000
Accumulated depreciation	1,100,000
At cost, less accumulated depreciation of $1,666,582 (December 31, 2018 - $1,634,394)	$ 2,700,000

Leases - Direct Financing Lease

Leases - Direct Financing Lease (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018
Capital Leased Assets [Line Items]
Contract liabilities	$ 137,805		$ 201,602
Direct financing lease | VOC Equipment
Capital Leased Assets [Line Items]
Capital lease receivable		$ 5,900
Contract liabilities	700
Deferred Income		$ 1,100
Future Scheduled Payments:
2020	1,300
2021	1,300
2022	1,300
2023	600
Minimum lease payments receivable	$ 4,600

Leases - Charters-in (Details)

Leases - Charters-in (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Leases [Abstract]
Time charter hire expense	$ 22
Lease component costs	13
Non-lease operation costs	$ 9
Remaining average term	4 years
Discount rate	5.29%
One time costs	$ 22.4

Leases - Maturity (Details)

Leases - Maturity (Details)	Dec. 31, 2019USD ($)
Lease Commitments [Abstract]
January to December 2020	$ 11,694
January to December 2021	11,829
January to December 2022	11,995
January to December 2023	11,225
January to December 2024	641
Total payments	47,384
Less imputed interest	(4,840)
Carrying value of operating lease liabilities	42,544
Non-Lease Commitment
Carrying value of operating lease liabilities	42,544
January to December 2020	7,552
January to December 2021	7,639
January to December 2022	7,746
January to December 2023	7,249
January to December 2024	414
Total payments	30,600
Total Commitment
January to December 2020	19,246
January to December 2021	19,468
January to December 2022	19,741
January to December 2023	18,474
January to December 2024	1,055
Total payments	77,984
Payments in 2020	16,000,000
Payments in 2021	$ 2,300,000

Restructuring Charge (Details)

Restructuring Charge (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Contract termination
Restructuring Cost and Reserve [Line Items]
Restructuring costs incurred to date	$ 2.7		$ 1.5
Restructuring charges	$ 2.7
FPSO Segment
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities accrued		$ 0	$ 1.5

Related Party Transactions an_3

Related Party Transactions and Balances - Partnership Transactions (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	May 08, 2019
Related Party Transaction [Line Items]
Revenues	$ 42,628,000	$ 117,764,000	$ 49,509,000
Expenses from transactions with related party	(2,535,000)	(6,298,000)	(32,346,000)
General and administrative	(8,811,000)	(18,162,000)	(31,340,000)
Interest expense	(46,744,000)	(38,695,000)	(25,882,000)
Losses on debt repurchases	0	(46,041,000)	0
Carrying amount of debt	3,178,950,000	3,097,742,000
Teekay Corporation | Brookfield
Related Party Transaction [Line Items]
Acquired common units				$ 17,300,000
Loans receivable				$ 25,000,000
Teekay Corporation | Brookfield | General Partner Interest
Related Party Transaction [Line Items]
Percentage of ownership interest acquired				49.00%
Teekay Corporation | Brookfield | Brookfield General Partner Interest
Related Party Transaction [Line Items]
Percentage of ownership interest acquired				100.00%
Teekay Corporation | Brookfield | Common Unit Interest
Related Party Transaction [Line Items]
Percentage of ownership interest acquired				13.80%
Line of Credit | Teekay Corporation And Brookfield
Related Party Transaction [Line Items]
Interest expense	(8,300,000)	(5,000,000)	0
Brookfield Promissory Note
Related Party Transaction [Line Items]
Accretion expense	31,500,000
Debt settlement amount	200,000,000
Carrying amount of debt	168,500,000
Early termination fee debt	12,000,000
2016 Teekay Promissory Note
Related Party Transaction [Line Items]
Interest expense			(14,600,000)
Bonds | Five-Year Senior Unsecured Bonds Maturing July 2023
Related Party Transaction [Line Items]
Interest expense	(38,500,000)	(21,000,000)	0
Carrying amount of debt	700,000,000
Subordinated debt | Brookfield Promissory Note
Related Party Transaction [Line Items]
Interest expense		(10,000,000)	$ (5,300,000)
Accretion expense	$ 2,700,000	$ 2,200,000

Related Party Transactions an_4

Related Party Transactions and Balances - Additional Information (Details)

Jul. 02, 2018USD ($)

Jan. 01, 2018USD ($)subsidiary

Sep. 25, 2017USD ($)

Jul. 01, 2016USD ($)

Jul. 31, 2018USD ($)

Sep. 30, 2017USD ($)

Jun. 30, 2015tanker

Dec. 31, 2014USD ($)

Mar. 31, 2018USD ($)

May 19, 2019USD ($)

Dec. 31, 2019USD ($)vessel

Dec. 31, 2018USD ($)vessel

Dec. 31, 2017USD ($)vessel

Mar. 31, 2019USD ($)

Jun. 30, 2016USD ($)

Related Party Transaction [Line Items]

Due from affiliates

$ 0

$ 59,800,000

Expenses from transactions with related party

2,535,000

6,298,000

$ 32,346,000

Due to affiliate

20,000,000

183,800,000

Interest expense

46,744,000

38,695,000

25,882,000

Long-term debt (note 8)

2,825,712,000

2,543,406,000

Petrojarl I FPSO

Related Party Transaction [Line Items]

Expenses from transactions with related party

4,500,000

Business acquisition, purchase price

$ 57,000,000

Affiliated entity

Related Party Transaction [Line Items]

Guarantee fee

5,800,000

Construction of new shuttle tankers

Related Party Transaction [Line Items]

Operating lease arrangement period, lessor (in years)

15 years

Number of vessels | tanker

3

Newbuildings | Construction of new shuttle tankers

Related Party Transaction [Line Items]

Expenses from transactions with related party

4,100,000

2016 Teekay Corporation Promissory Note

Related Party Transaction [Line Items]

Due to affiliates

$ 200,000,000

Subordinated debt | 2016 Teekay Corporation Promissory Note

Related Party Transaction [Line Items]

Interest rate, percentage

10.00%

Interest payment date, period

6 months

Subordinated debt | Brookfield Promissory Note

Related Party Transaction [Line Items]

Due to affiliates

$ 200,000,000

$ 200,000,000

Interest rate, percentage

10.00%

Debt fair value

163,600,000

Interest expense

10,000,000

5,300,000

Debt instrument, face amount

$ 200,000,000

Bonds | Five-Year Senior Unsecured Bonds Maturing July 2023

Related Party Transaction [Line Items]

Interest rate, percentage

8.50%

8.50%

Interest expense

38,500,000

21,000,000

$ 0

Debt instrument, face amount

$ 700,000,000

$ 700,000,000

Debt instrument term (in years)

5 years

5 years

Cash | Subordinated debt | 2016 Teekay Corporation Promissory Note

Related Party Transaction [Line Items]

Interest rate, percentage

5.00%

Cash Equivalents | Subordinated debt | 2016 Teekay Corporation Promissory Note

Related Party Transaction [Line Items]

Interest rate, percentage

5.00%

Teekay Corporation | 2016 Teekay Corporation Promissory Note | Affiliated entity

Related Party Transaction [Line Items]

Interest expense

14,600,000

Teekay Corporation | Cash | Subordinated debt | 2016 Teekay Corporation Promissory Note | Affiliated entity

Related Party Transaction [Line Items]

Interest expense

9,600,000

Teekay Corporation | Cash Equivalents | Subordinated debt | 2016 Teekay Corporation Promissory Note | Affiliated entity

Related Party Transaction [Line Items]

Interest expense

1,700,000

Samsung Heavy Industries Co., Ltd.

Related Party Transaction [Line Items]

Cumulative Project and Engineering Costs

$ 1,800,000

1,100,000

Financial Guarantee

Related Party Transaction [Line Items]

Maximum exposure

$ 495,000,000

Revolving credit facility

Related Party Transaction [Line Items]

Revolving credit facilities borrowing capacity

$ 125,000,000

513,200,000

523,100,000

Revolving credit facility | Teekay Corporation

Related Party Transaction [Line Items]

Revolving credit facilities borrowing capacity

25,000,000

Revolving credit facility | Brookfield

Related Party Transaction [Line Items]

Revolving credit facilities borrowing capacity

$ 100,000,000

Asset Acquisition, Receivables Acquired

$ 25,000,000

Debt Instrument, Unused Borrowing Capacity, Amount

105,000,000

London Interbank Offered Rate (LIBOR) [Member] | Revolving credit facility | March 2019 Revolver

Related Party Transaction [Line Items]

Marginal rate added for interest paid (as a percent)

5.00%

London Interbank Offered Rate (LIBOR) [Member] | Revolving credit facility | After March 2019 Revolver

Related Party Transaction [Line Items]

Marginal rate added for interest paid (as a percent)

7.00%

Guaranteed by partnership and subsidiaries | Revolving credit facility

Related Party Transaction [Line Items]

Minimum liquidity (greater of)

$ 75,000,000

Minimum | Guaranteed by partnership and subsidiaries | Revolving credit facility

Related Party Transaction [Line Items]

Minimum liquidity (percent) (greater of)

5.00%

Brookfield

Related Party Transaction [Line Items]

Purchase price paid in cash

$ 610,000,000

$ 610,000,000

Brookfield | Bonds | Five-Year Senior Unsecured Bonds Maturing July 2023

Related Party Transaction [Line Items]

Debt instrument, face amount

$ 500,000,000

Long-term debt (note 8)

$ 423,600,000

$ 475,000,000

Brookfield Promissory Note | Brookfield

Related Party Transaction [Line Items]

Early termination fee

$ 12,000,000

Teekay Offshore | Brookfield

Related Party Transaction [Line Items]

General partner's interest (as a percent)

60.00%

Management Companies from Teekay Corporation

Related Party Transaction [Line Items]

Business Acquisition, Percentage of Voting Interests Acquired

100.00%

Number of Businesses Acquired | subsidiary

7

Purchase price paid in cash

$ 1,400,000

Shuttle tankers | Affiliated entity

Related Party Transaction [Line Items]

Number of vessels | vessel

2

3

2

FSO Segment | Affiliated entity

Related Party Transaction [Line Items]

Number of vessels | vessel

3

3

3

Derivative Instruments - Foreig

Derivative Instruments - Foreign Currency Forward Contracts (Details) € in Thousands, kr in Thousands, $ in Thousands	Dec. 31, 2019USD ($)	Dec. 31, 2019NOK (kr)	Dec. 31, 2019EUR (€)
Foreign currency forward contracts
Derivative [Line Items]
Fair Value / Carrying Amount of Asset/(Liability) Non-hedge	$ 575
Expected Maturity - 2020	$ 57,130
Norwegian Krone
Derivative [Line Items]
Notational amount | kr		kr 457,205
Average Forward Rate	8.87	8.87	8.87
Norwegian Krone | Foreign currency forward contracts
Derivative [Line Items]
Fair Value / Carrying Amount of Asset/(Liability) Non-hedge	$ 518
Expected Maturity - 2020	$ 51,567
Euro
Derivative [Line Items]
Notational amount | €			€ 5,000
Average Forward Rate	0.90	0.90	0.90
Euro | Foreign currency forward contracts
Derivative [Line Items]
Fair Value / Carrying Amount of Asset/(Liability) Non-hedge	$ 57
Expected Maturity - 2020	$ 5,563

Derivative Instruments - Intere

Derivative Instruments - Interest Rate Swap Agreements (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019USD ($)
Interest Rate Swap
Derivative [Line Items]
Notional amount	$ 1,283,719
Interest rate swap agreements	$ (163,972)
Interest Rate Swap | Minimum
Derivative [Line Items]
Range of credit facility margin (as a percent)	0.90%
Interest Rate Swap | Maximum
Derivative [Line Items]
Range of credit facility margin (as a percent)	6.50%
U.S. Dollar-denominated interest rate swaps
Derivative [Line Items]
Notional amount	$ 680,648
Interest rate swap agreements	$ (126,630)
Weighted- Average Remaining Term (years)	5 years 6 months
Fixed Interest Rate	4.00%
U.S. Dollar-denominated interest rate swaps
Derivative [Line Items]
Notional amount	$ 603,071
Interest rate swap agreements	$ (37,342)
Weighted- Average Remaining Term (years)	2 years 5 months
Fixed Interest Rate	3.20%

Derivative Instruments - Effect

Derivative Instruments - Effective Portion of Gains (Losses) on Interest Rate Swap Agreements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Effective Portion Recognized in AOCI	$ 0
Effective Portion Reclassified from AOCI	689	$ 102	$ (1,186)
Ineffective Portion		0	(7)
Effective Portion Recognized in AOCI		(2,495)	(19)
Interest expense
Derivative [Line Items]
Effective Portion Recognized in AOCI	0
Effective Portion Reclassified from AOCI	$ 689	102	(1,186)
Ineffective Portion		0	(7)
Effective Portion Recognized in AOCI		$ (2,495)	$ (19)

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Aggregate fair value asset	$ 1,100,000	$ 0
Aggregate fair value liability	118,200,000	91,100,000
Restricted cash	$ 0	$ 1,200,000

Derivative Instruments - Locati

Derivative Instruments - Location and Fair Value Amounts of Derivative Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Other Current Assets	$ 7,467	$ 11,879
Other Assets	220,716	198,992
Accrued Liabilities	(140,976)	(129,896)
Derivative Liabilities	(143,222)	(94,354)
Derivative Financial Instruments, Liabilities
Derivatives, Fair Value [Line Items]
Accrued Liabilities	(2,342)	(1,721)
Current Portion of Derivative Liabilities	(18,956)	(23,290)
Derivative Liabilities	(143,222)	(94,354)
Derivative Financial Instruments, Liabilities | Foreign currency contracts
Derivatives, Fair Value [Line Items]
Accrued Liabilities	0	0
Current Portion of Derivative Liabilities	(548)	(4,225)
Derivative Liabilities	0	(425)
Derivative Financial Instruments, Liabilities | Cross currency swaps
Derivatives, Fair Value [Line Items]
Accrued Liabilities		(96)
Current Portion of Derivative Liabilities		(4,442)
Derivative Liabilities		0
Derivative Financial Instruments, Liabilities | Interest rate swaps
Derivatives, Fair Value [Line Items]
Accrued Liabilities	(2,342)	(1,625)
Current Portion of Derivative Liabilities	(18,408)	(14,623)
Derivative Liabilities	(143,222)	(93,929)
Derivative Financial Instruments, Assets
Derivatives, Fair Value [Line Items]
Other Current Assets	1,123	1,028
Other Assets	0	2,075
Derivative Financial Instruments, Assets | Foreign currency contracts
Derivatives, Fair Value [Line Items]
Other Current Assets	1,123	0
Other Assets	0	0
Derivative Financial Instruments, Assets | Cross currency swaps
Derivatives, Fair Value [Line Items]
Other Current Assets		0
Other Assets		0
Derivative Financial Instruments, Assets | Interest rate swaps
Derivatives, Fair Value [Line Items]
Other Current Assets	0	1,028
Other Assets	$ 0	$ 2,075

Derivative Instruments - Effe_2

Derivative Instruments - Effect of (Losses) Gains on Derivatives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized (loss) gain on derivative instruments	$ (50,956)	$ 53,419	$ 59,702
Total realized and unrealized (loss) gain on derivative instruments	(85,195)	12,808	(42,853)
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Realized (loss) gain on derivative instruments	(34,239)	(39,239)	(77,396)
Unrealized (loss) gain on derivative instruments	(50,956)	52,047	34,543
Total realized and unrealized (loss) gain on derivative instruments	(85,195)	12,808	(42,853)
Not Designated as Hedging Instrument | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Realized (loss) gain on derivative instruments	(29,185)	(38,011)	(78,296)
Unrealized (loss) gain on derivative instruments	(56,182)	56,420	33,114
Not Designated as Hedging Instrument | Foreign currency forward contracts
Derivative Instruments, Gain (Loss) [Line Items]
Realized (loss) gain on derivative instruments	(5,054)	(1,228)	900
Unrealized (loss) gain on derivative instruments	$ 5,226	$ (4,373)	$ 1,429

Derivative Instruments - Effe_3

Derivative Instruments - Effect of Gain (Loss) on Cross Currency Swaps on Consolidated Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Total realized and unrealized (loss) gain on derivative instruments	$ (85,195)	$ 12,808	$ (42,853)
Foreign exchange and other derivative financial instruments | Cross currency swap agreement
Derivative Instruments, Gain (Loss) [Line Items]
Realized loss	(4,177)	(39,647)	(84,205)
Unrealized gain	4,442	38,648	91,914
Total realized and unrealized (loss) gain on derivative instruments	$ 265	$ (999)	$ 7,709

Income Taxes - Components of Pa

Income Taxes - Components of Partnership's Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Tax losses carried forward	$ 240,432	$ 251,240
Other	9,348	2,887
Total deferred tax assets	249,780	254,127
Deferred tax liabilities:
Vessels and equipment	20,179	17,018
Other	3,566	5,531
Deferred Tax Liabilities, Gross	23,745	22,549
Net deferred tax assets	226,035	231,578
Valuation allowance	(222,168)	(224,593)
Net deferred tax assets	3,867	6,985
Disclosed in:
Deferred tax asset	7,000	9,168
Other long-term liabilities	3,133	2,183
Net deferred tax assets	3,867	6,985
Operating Loss Carryforwards [Line Items]
Income tax net operating loss carry forward	1,021,100	$ 1,040,400
Carried forward indefinitely
Operating Loss Carryforwards [Line Items]
Income tax net operating loss carry forward	632,700
2020
Operating Loss Carryforwards [Line Items]
Income tax net operating loss carry forward	900
2021
Operating Loss Carryforwards [Line Items]
Income tax net operating loss carry forward	400
2022
Operating Loss Carryforwards [Line Items]
Income tax net operating loss carry forward	500
2023
Operating Loss Carryforwards [Line Items]
Income tax net operating loss carry forward	2,200
2024
Operating Loss Carryforwards [Line Items]
Income tax net operating loss carry forward	300
2025
Operating Loss Carryforwards [Line Items]
Income tax net operating loss carry forward	600
2026
Operating Loss Carryforwards [Line Items]
Income tax net operating loss carry forward	100
2034
Operating Loss Carryforwards [Line Items]
Income tax net operating loss carry forward	377,800
2035
Operating Loss Carryforwards [Line Items]
Income tax net operating loss carry forward	$ 5,600

Income Taxes - Components of Pr

Income Taxes - Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Current	$ (4,666)	$ (4,051)	$ (1,772)
Deferred	(3,161)	(18,606)	1,870
Income tax (expense) recovery	$ (7,827)	$ (22,657)	$ 98

Income Taxes - Reconciliations

Income Taxes - Reconciliations of Income Tax Rate and Actual Tax Charge (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Net loss before taxes	$ (343,068)	$ (101,288)	$ (299,540)
Net loss not subject to taxes	(418,027)	(253,605)	(244,045)
Net income (loss) subject to taxes	74,959	152,317	(55,495)
At applicable statutory tax rates	11,741	28,437	(15,784)
Permanent differences	(3,846)	(23,179)	2,424
Adjustments related to currency differences	(360)	(338)	5,847
Valuation allowance and other	292	17,737	7,415
Tax expense (recovery) related to current year	$ 7,827	$ 22,657	$ (98)

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Partnership's Total Amount of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance of unrecognized tax benefits as at beginning of the year	$ 1,596	$ 1,410	$ 2,174
Decreases for positions related to prior years	0	(189)	(930)
Increases for positions related to the current year	0	375	166
Balance of unrecognized tax benefits as at end of the year	$ 1,596	$ 1,596	$ 1,410

Commitments and Contingencies -

Commitments and Contingencies - Additional Information - Logitel (Details) $ in Thousands	1 Months Ended		3 Months Ended	12 Months Ended
	Feb. 28, 2015maintenance_and_safety_unit	Aug. 31, 2014maintenance_and_safety_unit	Jun. 30, 2016USD ($)hull	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Mar. 31, 2018USD ($)	Jun. 30, 2017USD ($)
Loss Contingencies [Line Items]
Write-down of assets related to newbuildings				$ 332,125	$ 223,355	$ 318,078
Stavanger Spirit
Loss Contingencies [Line Items]
Range of possible losses in addition to what has already been accrued							$ 186,200
Stavanger Spirit | Maximum
Loss Contingencies [Line Items]
Estimate of possible loss			$ 170,000
Nantong Spirit | Logitel Offshore Rig III LLC
Loss Contingencies [Line Items]
Range of possible losses in addition to what has already been accrued								$ 51,900
Nantong Spirit | Minimum
Loss Contingencies [Line Items]
Estimate of possible loss				10,000
Nantong Spirit | Maximum
Loss Contingencies [Line Items]
Estimate of possible loss				40,000
UMS segment
Loss Contingencies [Line Items]
Reversed contingent liabilities			14,500
Operating segments | UMS segment
Loss Contingencies [Line Items]
Write-down of assets related to newbuildings			$ 43,700
Logitel
Loss Contingencies [Line Items]
Percentage of ownership interest acquired		100.00%
Number of units for maintenance and safety | maintenance_and_safety_unit	1	3
Loss contingency accrual				$ 43,300
Logitel | Sevan Marine ASA
Loss Contingencies [Line Items]
Number of hulls to be converted | hull			2

Commitments and Contingencies_2

Commitments and Contingencies - Additional Information - Petrojarl I (Details) - USD ($) $ in Millions	Oct. 31, 2018	May 31, 2018	Dec. 31, 2014	May 31, 2014
Petrojarl I L.L.C.
Loss Contingencies [Line Items]
Estimated claim	$ 110	$ 145.4
Petrojarl I FPSO
Loss Contingencies [Line Items]
Business acquisition, purchase price			$ 57
Operating lease arrangement period, lessor (in years)				5 years

Commitments and Contingencies_3

Commitments and Contingencies - Additional Information - Samsung (Details)	1 Months Ended	12 Months Ended			24 Months Ended
	Jul. 31, 2018USD ($)newbuilding	Dec. 31, 2019USD ($)newbuilding	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2020vessel	Sep. 30, 2019	Aug. 31, 2019USD ($)	Apr. 30, 2019USD ($)
Loss Contingencies [Line Items]
January to December 2020		$ 7,552
Debt instrument, face amount		3,178,950,000	$ 3,097,742,000
Net payments for vessels and equipment, including advances on newbuilding contracts and conversion costs		214,670,000	$ 233,736,000	$ 533,260,000
Samsung Heavy Industries Co., Ltd.
Loss Contingencies [Line Items]
Aggregate fully built-up cost for shipbuilding contracts				588,700,000			$ 128,200,000
Subsidiaries expected to be received				$ 16,000,000
Net payments for vessels and equipment, including advances on newbuilding contracts and conversion costs		7,200,000
Payments due in 2020							21,200,000
Payments due in 2021							26,700,000
Proceeds under long-term sale leaseback transaction		214,200,000
Payments due in 2022							$ 73,100,000
Suezmax DP2 Shuttle Tanker Newbuildings | Samsung Heavy Industries Co., Ltd.
Loss Contingencies [Line Items]
January to December 2020		367,600,000
Debt instrument, face amount								$ 413,800,000
Debt instrument, face amount		$ 198,100,000
Number of newbuildings | newbuilding		4
Net payments for vessels and equipment, including advances on newbuilding contracts and conversion costs		$ 221,100,000
Suezmax DP2 Shuttle Tanker Newbuildings | Scenario, Forecast | Samsung Heavy Industries Co., Ltd.
Loss Contingencies [Line Items]
Number of vessels | vessel					2
Aframax DP 2 Shuttle Tanker Newbuildings
Loss Contingencies [Line Items]
Number of newbuildings | newbuilding	2
Aframax DP 2 Shuttle Tanker Newbuildings | Samsung Heavy Industries Co., Ltd.
Loss Contingencies [Line Items]
Aggregate fully built-up cost for shipbuilding contracts	$ 257,100,000
Subsidiaries expected to be received	$ 2,000,000
Payments made towards the commitment		53,200,000
Payments due in 2020		129,500,000
Payments due in 2021		74,400,000
Sale-Leaseback Financing | Samsung Heavy Industries Co., Ltd.
Loss Contingencies [Line Items]
Other Liabilities		$ 23,800,000
Interest rate on convertible promissory note (as a percent)						5.50%

Commitments and Contingencies_4

Commitments and Contingencies - Additional Information - Partnership Units (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Oct. 01, 2019	Sep. 25, 2017
Other Commitments [Line Items]
Units Held by Entity's and Individuals	5,000,000
Cash exchange per share for shares not owned	$ 1.05
Units issued, price per unit (USD per unit)			$ 2.50
Partnership Acquisition
Other Commitments [Line Items]
Units issued, price per unit (USD per unit)		$ 1.55

Commitments and Contingencies_5

Commitments and Contingencies - Additional Information - Presentation of Financial Statements (Details) - USD ($) $ in Thousands	12 Months Ended			36 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2021
Loss Contingencies [Line Items]
Net operating cash flow	$ 319,909	$ 280,643	$ 305,200
Working capital deficit	(184,500)
Current portion of long-term debt	$ 353,238	$ 554,336
Scenario, Forecast
Loss Contingencies [Line Items]
Anticipated payments for vessels under construction				$ 693,000

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information - Reconciliation of Cash, Cash Equivalents, and Restriched Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 199,388	$ 225,040	$ 221,934
Restricted cash	17,798	8,540	28,360
Restricted cash - long-term	89,070	0	0
Total	$ 306,256	$ 233,580	$ 250,294	$ 342,287

Supplemental Cash Flow Inform_4

Supplemental Cash Flow Information - Changes in Non-Cash Working Capital Items Related to Operating Activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Accounts receivable	$ (57,957)	$ 22,320	$ (54,830)
Prepaid expenses and other assets	1,115	(2,104)	(6,618)
Accounts payable and accrued liabilities	68,219	(32,800)	43,113
Due from (to) related parties	1,039	(70,643)	51,841
Change in non-cash working capital items related to operating activities	$ 12,416	$ (83,227)	$ 33,506

Supplemental Cash Flow Inform_5

Supplemental Cash Flow Information - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]
Cash interest paid, net	$ 217.8	$ 204.5	$ 205
Income taxes paid	$ 4.9	$ 2.1	$ 2.2

Total Capital and Net Income _3

Total Capital and Net Income Per Common Unit - Additional Information (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Oct. 01, 2019	Sep. 25, 2017
Limited Partners' Capital Account [Line Items]
Units issued, price per unit (USD per unit)			$ 2.50
Public
Limited Partners' Capital Account [Line Items]
General partner's interest (as a percent)	26.90%
Brookfield
Limited Partners' Capital Account [Line Items]
General partner's interest (as a percent)	73.10%
Brookfield | General Partner
Limited Partners' Capital Account [Line Items]
General partner's interest (as a percent)	100.00%
Unaffiliated Ownership
Limited Partners' Capital Account [Line Items]
Unaffiliated unit ownership percentage	1.30%
Partnership Acquisition
Limited Partners' Capital Account [Line Items]
Units issued, price per unit (USD per unit)		$ 1.55
Common Class B | Brookfield
Limited Partners' Capital Account [Line Items]
General partner's interest (as a percent)	100.00%
Common Units | The Partnership
Limited Partners' Capital Account [Line Items]
General partner's interest (as a percent)	98.70%

Total Capital and Net Income _4

Total Capital and Net Income Per Common Unit - Additional Information - Limited Partners' Rights (Details)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Number of days within which to receive distributed available cash	45 days
Minimum percentage of outstanding units to be held for general partner removal	66.66%

Total Capital and Net Income _5

Total Capital and Net Income Per Common Unit - Summary of Incentive Distribution Rights (Details)	12 Months Ended
	Dec. 31, 2019$ / shares
Unitholders
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Minimum quarterly distribution of $0.35	99.24%
Up to $0.4025	99.24%
Above $0.4025 up to $0.4375	86.24%
Above $0.4375 up to $0.525	76.24%
Above $0.525	51.24%
General Partner
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Minimum quarterly distribution of $0.35	0.76%
Up to $0.4025	0.76%
Above $0.4025 up to $0.4375	13.76%
Above $0.4375 up to $0.525	23.76%
Above $0.525	48.76%
Minimum quarterly distribution of $0.35 | Minimum
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Quarterly distribution target amount (USD per unit)	$ 0.35
Up to $0.4025 | Maximum
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Quarterly distribution target amount (USD per unit)	0.4025
Above $0.4025 up to $0.4375 | Minimum
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Quarterly distribution target amount (USD per unit)	0.4025
Above $0.4025 up to $0.4375 | Maximum
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Quarterly distribution target amount (USD per unit)	0.4375
Above $0.4375 up to $0.525 | Minimum
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Quarterly distribution target amount (USD per unit)	0.4375
Above $0.4375 up to $0.525 | Maximum
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Quarterly distribution target amount (USD per unit)	0.5250
Above $0.525 | Minimum
Incentive Distribution Made to Managing Member or General Partner [Line Items]
Quarterly distribution target amount (USD per unit)	$ 0.525

Total Capital and Net Income _6

Total Capital and Net Income Per Common Unit - Additional Information - Incentive Distribution Rights (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Dividends Payable [Line Items]
Exceeded cash distributions per unit (USD per unit) (less than)		$ 0.04	$ 0.24
Common Units
Dividends Payable [Line Items]
Exceeded cash distributions per unit (USD per unit) (less than)	$ 0.35	$ 0.35	$ 0.35

Total Capital and Net Income _7

Total Capital and Net Income Per Common Unit - Additional Information - Series E Preferred Units (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended
	Jan. 31, 2018	Apr. 30, 2015	Apr. 30, 2013	Dec. 31, 2019
Series A Preferred Units
Class of Stock [Line Items]
Number of units issued			6,000,000
Preferred units dividend rate			7.25%
Aggregate redemption amount			$ 150
Net proceeds			$ 144.8
Redemption of preferred units (USD per unit)			$ 25
Series B Preferred Units
Class of Stock [Line Items]
Number of units issued		5,000,000
Preferred units dividend rate		8.50%
Aggregate redemption amount		$ 125
Net proceeds		$ 120.8
Redemption of preferred units (USD per unit)				$ 25
Series E Preferred Units
Class of Stock [Line Items]
Preferred units dividend rate	8.875%
Liquidation preference per unit (USD per unit)	$ 25
Underwriter's Over-allotment Option | Series E Preferred Units
Class of Stock [Line Items]
Number of units issued	4,800,000
Preferred Partner | Preferred Units
Class of Stock [Line Items]
Net proceeds	$ 116
LIBOR | Series E Preferred Units
Class of Stock [Line Items]
Variable rate on dividend payment	6.407%

Total Capital and Net Income _8

Total Capital and Net Income Per Common Unit - Additional Information - Series C-1 and Series D Preferred Units (Details) $ / shares in Units, $ in Millions	1 Months Ended		12 Months Ended
	Sep. 30, 2017USD ($)tranche$ / sharesshares	Jun. 30, 2016tranche	Dec. 31, 2019$ / sharesshares	Dec. 31, 2018shares	Dec. 31, 2017shares	Sep. 25, 2017$ / shares
Class of Stock [Line Items]
Repurchase of preferred units | $	$ 260.2
Accrued and unpaid quarterly distributions | $	$ 10.2
Exercise price of warrants (USD per unit)						$ 0.01
Warrants (units) | shares			6,750,000	6,750,000	6,750,000
Brookfield
Class of Stock [Line Items]
General partner's interest (as a percent)			73.10%
Series D Warrant
Class of Stock [Line Items]
Exercise price of warrants (USD per unit)	$ 6.05		$ 4.55
Warrants (units) | shares	2,250,000
Number of tranches | tranche	1	2
Warrants
Class of Stock [Line Items]
Warrants (units) | shares			6,750,000
Retained Earnings
Class of Stock [Line Items]
Gain on repurchase | $	$ 20
Series C-1 Preferred Units
Class of Stock [Line Items]
Redemption of preferred units (USD per unit)	$ 18.20
Series D Preferred Units
Class of Stock [Line Items]
Redemption of preferred units (USD per unit)	$ 23.75

Total Capital and Net Income _9

Total Capital and Net Income Per Common Unit - Additional Information - Series D Detachable Warrants (Details) - $ / shares	1 Months Ended
	Jun. 30, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Sep. 25, 2017
Class of Stock [Line Items]
Warrants outstanding (units)		6,750,000	6,750,000	6,750,000
Exercise price of warrants (USD per unit)						$ 0.01
The $4.55 Warrants
Class of Stock [Line Items]
Warrants outstanding (units)	4,500,000
Exercise price of warrants (USD per unit)	$ 4.55
The $6.05 Warrants
Class of Stock [Line Items]
Warrants outstanding (units)	2,250,000
Exercise price of warrants (USD per unit)	$ 6.05
Series D Warrant
Class of Stock [Line Items]
Warrants outstanding (units)					2,250,000
Exercise price of warrants (USD per unit)		$ 4.55			$ 6.05
Series D Preferred Units
Class of Stock [Line Items]
Common units issued	4,000,000
Preferred units dividend rate	10.50%

Total Capital and Net Income_10

Total Capital and Net Income Per Common Unit - Additional Information - Brookfield Transaction Warrants and Common Units Issued (Details)	Sep. 25, 2017USD ($)day$ / sharesshares	Jul. 31, 2018USD ($)shares	Sep. 30, 2017USD ($)shares	Dec. 31, 2019USD ($)shares	Dec. 31, 2018USD ($)shares	Dec. 31, 2017USD ($)shares	Jan. 22, 2020$ / shares	Oct. 01, 2019$ / shares	May 08, 2019USD ($)	Jul. 01, 2016USD ($)
Class of Warrant or Right [Line Items]
Units issued, price per unit (USD per unit) | $ / shares	$ 2.50
Proceeds from issuance of common units and warrants				$ 0	$ 0	$ 640,595,000
Contribution of capital from Teekay Corporation						45,315,000
Exercise price of warrants (USD per unit) | $ / shares	0.01
Par value (USD per unit) | $ / shares	$ 4
Consecutive trading days | day	10
Common Units and Additional Paid-in Capital | Limited Partner
Class of Warrant or Right [Line Items]
Contribution of capital from Teekay Corporation						$ 44,442,000
Common Units | Limited Partner
Class of Warrant or Right [Line Items]
Common units issued | shares	256,000,000		256,000,000			256,000,000
Partnership Acquisition
Class of Warrant or Right [Line Items]
Units issued, price per unit (USD per unit) | $ / shares								$ 1.55
Brookfield | Common Units
Class of Warrant or Right [Line Items]
Fair value basis of investment	$ 512,600,000
Warrants | Brookfield
Class of Warrant or Right [Line Items]
Fair value basis of investment	121,300,000
Brookfield Promissory Note | Common Units and Additional Paid-in Capital | Limited Partner
Class of Warrant or Right [Line Items]
Contribution of capital from Teekay Corporation	39,500,000
Subordinated debt | Brookfield Promissory Note
Class of Warrant or Right [Line Items]
Due to affiliates	200,000,000									$ 200,000,000
Debt instrument, face amount	200,000,000
Extinguishment of debt	163,600,000
Subordinated debt | Teekay Corporation Promissory Note
Class of Warrant or Right [Line Items]
Debt instrument, face amount	200,000,000
Extinguishment of debt	160,500,000
Brookfield
Class of Warrant or Right [Line Items]
Purchase price paid in cash	$ 610,000,000		$ 610,000,000
Number of units to be issued/exchanged | shares	244,000,000		244,000,000
Number of warrants to be issued (in units) | shares			62,400,000
Proceeds from issuance of common units and warrants	$ 637,000,000
Brookfield | Teekay Corporation
Class of Warrant or Right [Line Items]
Acquired common units									$ 17,300,000
Loans receivable									$ 25,000,000
Brookfield | Warrants
Class of Warrant or Right [Line Items]
Number of units to be issued/exchanged | shares	62,400,000
Brookfield | Warrants | Brookfield
Class of Warrant or Right [Line Items]
Number of warrants (in units) | shares				65,500,000	50,000,000	51,000,000
Teekay Corporation
Class of Warrant or Right [Line Items]
Purchase price paid in cash	$ 30,000,000		$ 30,000,000
Number of units to be issued/exchanged | shares	12,000,000		12,000,000
Teekay Corporation | Warrants
Class of Warrant or Right [Line Items]
Number of units to be issued/exchanged | shares	3,100,000		3,100,000
Teekay Corporation | Warrants | Brookfield
Class of Warrant or Right [Line Items]
Number of warrants (in units) | shares		1,000,000		0	15,500,000	14,500,000
Teekay Corporation | Subordinated debt
Class of Warrant or Right [Line Items]
Number of warrants to be issued (in units) | shares	11,400,000
Aggregate proceeds from the debt purchase	$ 140,000,000
Brookfield Transaction | Teekay Corporation
Class of Warrant or Right [Line Items]
Acquired common units		$ 17,300,000
Loans receivable		$ 25,000,000
General Partner | Brookfield
Class of Warrant or Right [Line Items]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest Acquired		2.00%
Subsequent Event | Partnership Acquisition
Class of Warrant or Right [Line Items]
Units issued, price per unit (USD per unit) | $ / shares							$ 1.55
General Partner Interest | Brookfield | Teekay Corporation
Class of Warrant or Right [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired									49.00%
General Partner Interest | Brookfield Transaction | Teekay Corporation
Class of Warrant or Right [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		49.00%
Common Unit Interest | Brookfield | Teekay Corporation
Class of Warrant or Right [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired									13.80%
Common Unit Interest | Brookfield Transaction | Teekay Corporation
Class of Warrant or Right [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired		13.80%
Brookfield
Class of Warrant or Right [Line Items]
General partner's interest (as a percent)				73.10%
Brookfield | General Partner
Class of Warrant or Right [Line Items]
General partner's interest (as a percent)				100.00%

Total Capital and Net Income_11

Total Capital and Net Income Per Common Unit - Additional Information - Series B and Series A Preferred Units (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended
	Apr. 30, 2015	Apr. 30, 2013	Dec. 31, 2019
Series B Preferred Units
Class of Stock [Line Items]
Number of units issued	5,000,000
Preferred units dividend rate	8.50%
Aggregate redemption amount	$ 125
Net proceeds	$ 120.8
Redemption of preferred units (USD per unit)			$ 25
Series A Preferred Units
Class of Stock [Line Items]
Number of units issued		6,000,000
Preferred units dividend rate		7.25%
Aggregate redemption amount		$ 150
Net proceeds		$ 144.8
Redemption of preferred units (USD per unit)		$ 25

Total Capital and Net Income_12

Total Capital and Net Income Per Common Unit - Summary Net (Loss) Income Per Common Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Earning Per Share [Line Items]
Limited partners' interest in net loss	$ (378,770)	$ (147,141)	$ (339,501)
Limited partners' interest in net loss for basic net loss per common unit	(378,770)	(147,141)	(320,749)
Limited partners' interest in diluted net loss	$ (378,770)	$ (147,141)	$ (335,093)
Weighted average number of common units (in units)	410,727,035	410,261,239	220,755,937
Common units and common unit equivalents (in units)	410,727,035	410,261,239	229,940,120
Limited partner's interest in net loss per common unit
- basic (USD per unit)	$ (0.92)	$ (0.36)	$ (1.45)
- diluted (USD per unit)	$ (0.92)	$ (0.36)	$ (1.46)
Series C-1 Preferred Units
Earning Per Share [Line Items]
Series C-1 Preferred Units - cash distributions			$ 6,384
Dilutive effect of Series C-1 Preferred Units and unit based compensation (in shares)	0	0	9,184,183
Limited Partner
Earning Per Share [Line Items]
Preferred units - periodic accretion	$ 0	$ 0	$ (2,380)
Net gain on repurchase of Series C-1 and Series D Preferred Units	0	0	19,637
Gain on modification of warrants	0	0	1,495
Limited partners' interest in net loss for basic net loss per common unit	(378,770)	(147,141)	(320,749)
Limited Partner | Series C-1 Preferred Units
Earning Per Share [Line Items]
Net gain on repurchase of Series C-1 and Series D Preferred Units	0	0	(26,994)
Series C-1 Preferred Units - cash distributions	$ 0	$ 0	$ 12,650

Total Capital and Net Income_13

Total Capital and Net Income Per Common Unit - Additional Information - Net Income (Loss) Per Common Unit (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Preferred unitholders' interest in comprehensive income	$ 32.2	$ 31.5	$ 42.1
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in units)	72.3	72.3	72.3
Restricted Unit
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in units)	0.5	0.1	0.4
Series C, C-1 and D Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (in units)			31.9

Total Capital and Net Income_14

Total Capital and Net Income Per Common Unit - Summary of Issuances of Common Units (Details) - USD ($) $ in Thousands	Sep. 25, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017
Capital Unit [Line Items]
COP/Private, Gross Proceeds			$ 116,003	$ 625,387
PIK, Gross Proceeds				(18,988)
Brookfield
Capital Unit [Line Items]
Number of common units issued	244,000,000	244,000,000
Number of warrants to be issued (in units)		62,400,000
Cash consideration	$ 610,000	$ 610,000
Teekay Corporation
Capital Unit [Line Items]
Number of common units issued	12,000,000	12,000,000
Cash consideration	$ 30,000	$ 30,000
General Partner
Capital Unit [Line Items]
COP/Private, Gross Proceeds				588
PIK, Gross Proceeds				699
Net Proceeds				29,800
General Partner | Capital Units
Capital Unit [Line Items]
PIK, Gross Proceeds				$ 29,800
Limited Partner
Capital Unit [Line Items]
COP/Private, Gross Proceeds		640,000
Net Proceeds		$ 628,100
Limited Partner | Common Units
Capital Unit [Line Items]
COP/Private, Number of Common Units Issued	256,000,000	256,000,000		256,000,000
PIK, Number of Common Units Issued				6,391,087
Limited Partner | Common Units and Additional Paid-in Capital
Capital Unit [Line Items]
COP/Private, Gross Proceeds				$ 504,851
PIK, Gross Proceeds				$ (19,687)
Warrants | Brookfield
Capital Unit [Line Items]
Number of common units issued	62,400,000
Expenses from acquisition		$ 1,400
Warrants | Teekay Corporation
Capital Unit [Line Items]
Number of common units issued	3,100,000	3,100,000

Unit Based Compensation (Detail

Unit Based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unit-based compensation expense	$ 76,245	$ 65,427	$ 62,249
Cash settled restricted unit-based compensation awards	$ 140,976	$ 129,896
Restricted Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted units granted	2,577,626	1,424,058	321,318
Common units aggregate value, granted	$ 3,000	$ 3,700	$ 1,600
Vesting period from grant date (in years)	3 years
Non-vested restricted units outstanding	3,764,261	1,456,999	480,301
Common units, vested	460,689	342,560	255,370
Common units, value	$ 1,600	$ 2,000	$ 2,200
Equity based compensation and other, units	116,282	111,336	83,060
Payment to the grantees	$ 300	$ 400	$ 600
Unit-based compensation expense	2,600	1,400	$ 900
Cash settled restricted unit-based compensation awards	2,400	$ 700
Non-vested awards not yet recognized	$ 3,200
Expected weighted average period of non-vested awards not yet recognized (in years)	1 year 1 month
Non-management directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in units)	561,420
Common units aggregate value, granted	$ 700

(Write-down) and Gain on Sale_2

(Write-down) and Gain on Sale of Vessels - Additional Information (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)vessel
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings		$ 332,125,000	$ 223,355,000	$ 318,078,000
Carrying value		4,923,267,000	5,312,052,000
Proceeds from sale of vessels and equipment		33,341,000	30,049,000	13,100,000
Navion Scandia
Property, Plant and Equipment [Line Items]
Proceeds from sale of vessels and equipment			10,800,000
Navion Britannia
Property, Plant and Equipment [Line Items]
Proceeds from sale of vessels and equipment			10,400,000
Navion Scandia and Navion Britannia
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings			(5,300,000)
Navion Marita
Property, Plant and Equipment [Line Items]
Proceeds from sale of vessels and equipment	$ 5,700,000
FPSO Segment
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings		227,400,000	180,200,000	$ 265,200,000
Number of vessels | vessel				2
FSO Segment
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings		(11,200,000)		$ 1,100,000
Petrojarl Cidade de Rio das Ostras and Piranema Spirit FPSO Unit | FPSO Segment
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings		338,000,000	180,200,000
Ostras FPSO [Member] | FPSO Segment
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings		4,400,000
Navion Hispania and Stena Sirita | Shuttle Tankers
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings		2,300,000
Pattani Spirit | FSO Segment
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings		(11,200,000)
Proceeds from sale of vessels and equipment		15,700,000
Nordic Spirit | Shuttle Tankers
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings		(8,900,000)
Alexita Spirit | Shuttle Tankers
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings		(8,700,000)
Nordic Spirit and Alexita Spirit | Shuttle Tankers
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings		(1,300,000)
HiLoad DP Unit | Shuttle Tankers
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings			19,200,000	26,300,000
Carrying value		$ 0
Nordic Spirit and Stena Spirit | Shuttle Tankers
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings			$ 29,700,000
Navion Brasilia, Nordic Rio and Navion Marita Shuttle Tankers | Shuttle Tankers
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings				25,200,000
Nordic Rio Shuttle Tankers
Property, Plant and Equipment [Line Items]
Write-down of units				10,800,000
Navion Marita
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings				$ 5,100,000
50% owned subsidiary
Property, Plant and Equipment [Line Items]
Ownership interest percentage			50.00%	50.00%
50% owned subsidiary | Nordic Spirit and Stena Spirit | Shuttle Tankers
Property, Plant and Equipment [Line Items]
Write-down of assets related to newbuildings			$ (14,800,000)

Investment in Equity Accounte_3

Investment in Equity Accounted Joint Ventures - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended
	Oct. 31, 2014	Jun. 30, 2013	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Percentage of interest in joint venture			100.00%
Debt instrument, face amount			$ 3,178,950	$ 3,097,742
Investment in joint ventures			234,627	212,202	$ 169,875
Libra Joint Venture
Schedule of Equity Method Investments [Line Items]
Debt instrument, face amount			586,500	654,200
Libra Joint Venture | Interest Rate Swap | Designated as Hedging Instrument | Cash Flow Hedging
Schedule of Equity Method Investments [Line Items]
Term of contract	10 years
Notional amount			536,100	588,800
Fixed interest rate	2.52%
OOG-TKP FPSO GmbH & Co KG
Schedule of Equity Method Investments [Line Items]
Construction period loan facility, term (in years)		8 years
Debt instrument, face amount			105,900	138,200
OOG-TKP FPSO GmbH & Co KG | Interest Rate Swap | Not Designated as Hedging Instrument | Cash Flow Hedging
Schedule of Equity Method Investments [Line Items]
Term of contract		10 years
Notional amount			$ 105,900	$ 123,400
Fixed interest rate			2.50%
Minimum | OOG-TKP FPSO GmbH & Co KG
Schedule of Equity Method Investments [Line Items]
Marginal rate added for interest paid (as a percent)		2.45%
OOG-TKP FPSO GmbH & Co KG | Teekay Corporation
Schedule of Equity Method Investments [Line Items]
Percentage of interest in joint venture		50.00%
Libra Joint Venture
Schedule of Equity Method Investments [Line Items]
Percentage of interest in joint venture	50.00%
Libra Joint Venture | Ocyan S.A.
Schedule of Equity Method Investments [Line Items]
Percentage of interest in joint venture	50.00%
Ocyan S.A. | Libra Joint Venture
Schedule of Equity Method Investments [Line Items]
Marginal rate added for interest paid (as a percent)	2.65%
Ocyan S.A. | Minimum | Teekay Offshore
Schedule of Equity Method Investments [Line Items]
Construction period loan facility, term (in years)	10 years

Investment in Equity Accounte_4

Investment in Equity Accounted Joint Ventures - Schedule of Aggregated Summarized Financial Information for Equity Method's Investment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Cash and cash equivalents	$ 199,388	$ 225,040	$ 221,934
Non-current assets	7,467	11,879
Current liabilities	3,511,758	4,196,909
Long-term liabilities	220,716	198,992
Current portion of long-term debt	353,238	554,336
Other current liabilities (notes 2, 3 and 9)	14,793	15,062
Long-term debt	2,825,712	2,543,406
Other liabilities - non-current	223,877	236,616
Revenues	161,427	220,012	44,584
Operating income	(91,037)	111,737	(116,005)
Realized and unrealized (loss) gain on derivative instruments	(85,195)	12,808	(42,853)
Net income	(350,895)	(123,945)	(299,442)
Equity Method Investments
Schedule of Equity Method Investments [Line Items]
Cash and cash equivalents	159,045	148,208
Non-current assets	1,122,079	1,189,463
Current liabilities	127,110	139,777
Long-term liabilities	686,371	780,685
Revenues	264,266	264,215	90,662
Operating income	134,321	119,774	43,422
Net income	$ 72,022	$ 78,916	$ 28,884

Uncategorized Items - too-20191

Label	Element	Value
General Partner [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 316,000
Common Stock Including Additional Paid in Capital [Member] | Limited Partner [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 41,381,000