Teekay (TK) 6-K 12 Aug 19 2019 Q2 Current report (foreign) Financial data

Document and Entity Information

Document and Entity Information	6 Months Ended
	Jun. 30, 2019
Document And Entity Information [Abstract]
Document Type	6-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	TK
Entity Registrant Name	TEEKAY CORP
Entity Central Index Key	0000911971
Current Fiscal Year End Date	--12-31

Unaudited Consolidated Statemen

Unaudited Consolidated Statements of Loss - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenues (note 3)	$ 457,667,000	$ 405,642,000	$ 938,880,000	$ 799,664,000
Voyage expenses	(98,680,000)	(94,912,000)	(201,803,000)	(180,789,000)
Vessel operating expenses	(162,621,000)	(161,787,000)	(319,613,000)	(319,222,000)
Time-charter hire expenses (note 6)	(28,817,000)	(20,648,000)	(58,655,000)	(40,059,000)
Depreciation and amortization	(73,849,000)	(67,960,000)	(145,956,000)	(135,271,000)
General and administrative expenses	(20,868,000)	(24,470,000)	(43,840,000)	(49,153,000)
Write-down and loss on sales of vessels (note 7)	0	(32,830,000)	(3,328,000)	(51,492,000)
Restructuring charges (note 13)	(1,369,000)	(1,114,000)	(9,990,000)	(3,252,000)
Income from vessel operations	71,463,000	1,921,000	155,695,000	20,426,000
Interest expense	(70,205,000)	(59,526,000)	(143,876,000)	(114,151,000)
Interest income	2,233,000	2,095,000	4,922,000	3,772,000
Realized and unrealized (losses) gains on non-designated derivative instruments (note 15)	(10,964,000)	10,723,000	(16,387,000)	20,149,000
Equity (loss) income (note 4)	(6,284,000)	837,000	(67,937,000)	27,954,000
Foreign exchange (loss) gain (notes 9 and 15)	(5,851,000)	12,529,000	(8,481,000)	12,551,000
Loss on deconsolidation of Teekay Offshore (note 4)	0	0	0	(7,070,000)
Other (loss) income (note 9)	(11,099,000)	520,000	(11,071,000)	(395,000)
Loss before income taxes	(30,707,000)	(30,901,000)	(87,135,000)	(36,764,000)
Income tax expense (note 16)	(3,404,000)	(8,746,000)	(8,440,000)	(12,863,000)
Net loss	(34,111,000)	(39,647,000)	(95,575,000)	(49,627,000)
Net (income) loss attributable to non-controlling interests	(5,374,000)	11,323,000	(28,167,000)	748,000
Net loss attributable to the shareholders of Teekay Corporation	$ (39,485,000)	$ (28,324,000)	$ (123,742,000)	$ (48,879,000)
Basic and diluted loss attributable to shareholders of Teekay Corporation (in usd per share)	$ (0.39)	$ (0.28)	$ (1.23)	$ (0.49)
Per common share of Teekay Corporation (note 17)
Common Stock, Dividends, Per Share, Declared		$ 0.055
Weighted average number of common shares outstanding (note 17)
Basic and Diluted (in shares)	100,783,496	100,434,512	100,652,685	98,892,574

Unaudited Consolidated Statem_2

Unaudited Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net loss	$ (34,111)	$ (39,647)	$ (95,575)	$ (49,627)
Other comprehensive (loss) income before reclassifications
Unrealized (loss) gain on qualifying cash flow hedging instruments	(30,743)	7,054	(52,252)	9,676
Pension adjustments, net of taxes	(85)	181	(172)	376
Foreign exchange gain on currency translation	0	426	0	49
Amounts reclassified from accumulated other comprehensive (loss) income relating to:
Loss on deconsolidation of Teekay Offshore (note 4)	0	0	0	7,720
Other comprehensive (loss) income	(31,182)	7,138	(53,529)	17,471
Comprehensive loss	(65,293)	(32,509)	(149,104)	(32,156)
Comprehensive loss (income) attributable to non-controlling interests	15,789	6,910	8,096	(5,664)
Comprehensive loss attributable to shareholders of Teekay Corporation	(49,504)	(25,599)	(141,008)	(37,820)
Interest Expense
Other comprehensive (loss) income before reclassifications
Unrealized (loss) gain on qualifying cash flow hedging instruments				5,090
Amounts reclassified from accumulated other comprehensive (loss) income relating to:
Realized loss on qualifying cash flow hedging instruments to equity income	(157)	(2)	(408)	248
Equity Income
Amounts reclassified from accumulated other comprehensive (loss) income relating to:
Realized loss on qualifying cash flow hedging instruments to equity income	$ (197)	$ (521)	$ (697)	$ (598)

Unaudited Consolidated Balance

Unaudited Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current
Cash and cash equivalents (note 9 and 18)	$ 235,199	$ 424,169
Restricted cash – current (note 18)	50,798	40,493
Accounts receivable, including non-trade of $10,988 (2018 – $7,883) and related party balance of $18,014 (2018 – $57,062)	187,088	174,031
Accrued revenue	48,531	20,249
Prepaid Expenses and Other	108,274	69,882
Current portion of loans to equity-accounted investments (note 4)	93,924	169,197
Assets Held-for-sale, Not Part of Disposal Group, Current	12,300	0
Total current assets	736,114	898,021
Restricted cash – non-current (note 18)	36,886	40,977
Vessels and equipment (note 9)
At cost, less accumulated depreciation of $1,348,665 (2018 – $1,270,460)	3,228,349	3,362,937
Finance Lease, Right-of-Use Asset	2,234,194	2,067,254
Operating lease right-of-use assets (notes 2 and 6)	185,716	0
Advances on newbuilding contracts	0	86,942
Total vessels and equipment	5,648,259	5,517,133
Net investment in direct financing leases – non-current (notes 3 and 6)	551,603	562,528
Investment in and loans to equity-accounted investments (notes 4 and 11a)	1,011,530	1,193,741
Goodwill, intangibles and other non-current assets (note 15)	141,626	179,270
Total assets	8,126,018	8,391,670
Current
Accounts payable, accrued liabilities and other (notes 8, 13 and 15)	356,022	254,380
Loans from equity-accounted investments	27,607	75,292
Derivative Liability, Current	28,481	12,205
Current portion of long-term debt (note 9)	540,440	242,137
Current obligations related to finance leases (note 6)	89,922	102,115
Current portion of operating lease liabilities (notes 2 and 6)	59,554	0
Total current liabilities	1,102,026	686,129
Long-term debt (note 9)	2,302,885	3,077,386
Long-term operating lease liabilities (notes 2 and 6)	113,922	0
Derivative Liability	56,172	56,352
Long-term obligations related to finance leases (note 6)	1,736,810	1,571,730
Other long-term liabilities (note 16)	141,578	133,045
Total liabilities	5,453,393	5,524,642
Commitments and contingencies (notes 6, 9, 11, and 15)
Equity
Common stock and additional paid-in capital ($0.001 par value; 725,000,000 shares authorized; 100,784,431 shares outstanding and issued (2018 – 100,435,210)) (note 10)	1,049,531	1,045,659
Accumulated deficit	(361,162)	(234,395)
Non-controlling interest	2,005,399	2,058,037
Accumulated other comprehensive loss	(21,143)	(2,273)
Total equity	2,672,625	2,867,028
Total liabilities and equity	$ 8,126,018	$ 8,391,670

Unaudited Consolidated Balanc_2

Unaudited Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Accounts receivable, non-trade	$ 10,988	$ 7,883
Accounts receivable, related party balance	18,014	57,062
Accumulated depreciation on vessels and equipment	1,294,622	1,293,447
Sale Leaseback Transaction, Accumulated Depreciation	$ 93,858	$ 51,290
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, share authorized (in shares)	725,000,000	725,000,000
Common stock, share outstanding (in shares)	100,699,409	100,435,210
Common stock, share issued (in shares)	100,699,409	100,435,210

Unaudited Consolidated Statem_3

Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Loss Contingency, Receivable, Proceeds		$ 0
OPERATING ACTIVITIES
Net loss	$ (95,575)	(49,627)
Non-cash and non-operating items:
Depreciation and amortization	145,956	135,271
Unrealized Gain (Loss) on Derivatives and Loss on Sale of Warrants	(14,933)
Unrealized loss (gain) on derivative instruments and loss on sale of warrants (note 15)		(35,515)
Write-down and loss on sales of vessels (note 7)	3,328	51,492
Loss on deconsolidation of Teekay Offshore (note 4)	0	7,070
Equity loss (income), net of dividends received	85,211	(15,207)
Income tax expense	8,440	12,863
Other	(26,304)	(9,269)
Proceeds from Lease Payments	6,050
Change in operating assets and liabilities	18,427	14,325
Expenditures for dry docking	(34,150)	(12,437)
Net operating cash flow	178,924	110,434
Proceeds from Short-term Debt	65,000	0
FINANCING ACTIVITIES
Proceeds from issuance of long-term debt, net of issuance costs	376,658	409,793
Payment for Debt Extinguishment or Debt Prepayment Cost	759,401
Prepayments of long-term debt		(295,914)
Scheduled repayments of long-term debt (note 9)	(117,110)	(171,433)
Repayments of Short-term Debt	(50,000)	0
Proceeds from financing related to sale-leaseback of vessels	222,400	243,812
Finance Lease, Principal Payments	45,928	28,819
Net proceeds from equity issuances of Teekay Corporation (note 10)	0	103,657
Repurchase of Teekay LNG common units	(12,056)	0
Distributions paid from subsidiaries to non-controlling interests	(30,465)	(33,872)
Payments of Ordinary Dividends	5,523	11,036
Other financing activities	(580)	(566)
Net financing cash flow	(357,005)	215,622
INVESTING ACTIVITIES
Expenditures for vessels and equipment, net of warranty settlement $44,890 (2018 – $nil) (note 11a)	(89,120)	(315,348)
Proceeds from sale of equity-accounted investments and related assets (note 4)	100,000	54,438
Payments to Acquire Equity Method Investments	15,555	27,629
Loans to joint ventures and joint venture partners	0	(24,971)
Cash of transferred subsidiaries on sale, net of proceeds received (note 4)	0	(25,254)
Other investing activities	0	5,560
Net investing cash flow	(4,675)	(333,204)
Decrease in cash, cash equivalents and restricted cash	(182,756)	(7,148)
Cash, cash equivalents, restricted cash and restricted cash equivalents, beginning balance	505,639	552,174
Cash, cash equivalents, restricted cash and restricted cash equivalents, ending balance	$ 322,883	545,026
Accounting Standards Update 2016-02 [Member]
Non-cash and non-operating items:
Proceeds from Lease Payments		$ 5,200

Unaudited Consolidated Statem_4

Unaudited Consolidated Statement of Changes in Total Equity - USD ($) $ in Thousands	Total	Common Stock	Common Stock and Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	AOCI Including Portion Attributable to Noncontrolling Interest [Member]	Accumulated Other Comprehensive Loss	Non-controlling Interests	Common Stock	Common StockRetained Earnings (Accumulated Deficit)
Accumulated other comprehensive loss					$ (5,995)
Common Stock, Dividends, Per Share, Declared	$ 0.055
Net loss attributable to the shareholders of Teekay Corporation – basic and diluted				$ (20,555)
Net Income (Loss) Attributable to Noncontrolling Interest							$ 10,575
Beginning Balance (in shares) at Dec. 31, 2017		89,127,000
Beginning Balance at Dec. 31, 2017	$ 2,879,656		$ 919,078	(135,892)			2,102,465
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(9,980)
Other comprehensive loss	10,333					$ 8,334	1,999
Dividends declared:	(19,824)						(19,824)	$ (5,445)	$ (5,445)
Employee stock compensation and other (note 9) (in shares)		180,000
Employee stock compensation and other (note 10)	4,430		4,430
Proceeds from equity offerings, net of offering costs (note 9) (in shares)		11,127,000
Proceeds from equity offerings, net of offering costs (note 10)	(103,696)		(103,696)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Issuance of Equity by Subsidiary to Noncontrolling Interests	(5,146)			(1,988)
Changes to non-controlling interest from equity contributions and other (note 2)						99	3,059
Ending Balance (in shares) at Mar. 31, 2018		100,434,000
Ending Balance at Mar. 31, 2018	2,984,111		1,043,303	(159,904)			2,098,274
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt	16,099		16,099
Net loss attributable to the shareholders of Teekay Corporation – basic and diluted	(48,879)
Net Income (Loss) Attributable to Noncontrolling Interest	(748)
Beginning Balance (in shares) at Dec. 31, 2017		89,127,000
Beginning Balance at Dec. 31, 2017	2,879,656		919,078	(135,892)			2,102,465
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(49,627)
Other comprehensive loss	17,471
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	295,914
Ending Balance (in shares) at Jun. 30, 2018		100,435,000
Ending Balance at Jun. 30, 2018	$ 2,933,613		1,044,752	(193,751)			2,077,449
Accumulated other comprehensive loss					2,438
Common Stock, Dividends, Per Share, Declared	$ 0.055
Net loss attributable to the shareholders of Teekay Corporation – basic and diluted	$ (28,324)			(28,324)
Net Income (Loss) Attributable to Noncontrolling Interest	(11,323)						(11,323)
Beginning Balance (in shares) at Mar. 31, 2018		100,434,000
Beginning Balance at Mar. 31, 2018	2,984,111		1,043,303	(159,904)			2,098,274
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(39,647)
Other comprehensive loss	7,138					2,725	4,413
Dividends declared:	(14,048)						(14,048)	(5,604)	$ (5,604)
Employee stock compensation and other (note 9) (in shares)		1,000
Employee stock compensation and other (note 10)	1,488		1,488
Proceeds from equity offerings, net of offering costs (note 10)	(39)		(39)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Issuance of Equity by Subsidiary to Noncontrolling Interests	(214)			(81)
Changes to non-controlling interest from equity contributions and other (note 2)							133
Ending Balance (in shares) at Jun. 30, 2018		100,435,000
Ending Balance at Jun. 30, 2018	2,933,613		1,044,752	(193,751)			2,077,449
Accumulated other comprehensive loss					5,163
Accumulated other comprehensive loss	$ (2,273)				(2,273)
Common Stock, Dividends, Per Share, Declared	$ 0.055
Net loss attributable to the shareholders of Teekay Corporation – basic and diluted				(84,257)
Net Income (Loss) Attributable to Noncontrolling Interest							22,793
Beginning Balance (in shares) at Dec. 31, 2018	100,435,210	100,435,000
Beginning Balance at Dec. 31, 2018	$ 2,867,028		1,045,659	(234,395)			2,058,037
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(61,464)
Other comprehensive loss	(22,347)					(7,247)	(15,100)
Dividends declared:	(13,892)			(5,385)			(13,892)	$ (5,385)
Employee stock compensation and other (note 9) (in shares)		264,000
Employee stock compensation and other (note 10)	2,964		2,964
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(2,991)			606		(1,604)	(1,993)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Issuance of Equity by Subsidiary to Noncontrolling Interests	(7,823)			(1,526)
Changes to non-controlling interest from equity contributions and other (note 2)							(9,349)
Ending Balance (in shares) at Mar. 31, 2019		100,699,000
Ending Balance at Mar. 31, 2019	2,756,090		1,048,623	(321,905)			2,040,496
Net loss attributable to the shareholders of Teekay Corporation – basic and diluted	(123,742)
Net Income (Loss) Attributable to Noncontrolling Interest	$ 28,167
Beginning Balance (in shares) at Dec. 31, 2018	100,435,210	100,435,000
Beginning Balance at Dec. 31, 2018	$ 2,867,028		1,045,659	(234,395)			2,058,037
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(95,575)
Other comprehensive loss	$ (53,529)
Ending Balance (in shares) at Jun. 30, 2019	100,699,409	100,784,000
Ending Balance at Jun. 30, 2019	$ 2,672,625		1,049,531	(361,162)			2,005,399
Accumulated other comprehensive loss					(11,124)
Net loss attributable to the shareholders of Teekay Corporation – basic and diluted	(39,485)			(39,485)
Net Income (Loss) Attributable to Noncontrolling Interest	5,374						5,374
Beginning Balance (in shares) at Mar. 31, 2019		100,699,000
Beginning Balance at Mar. 31, 2019	2,756,090		1,048,623	(321,905)			2,040,496
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(34,111)
Other comprehensive loss	(31,182)					$ (10,019)	(21,163)
Dividends declared:	(16,574)						(16,574)
Employee stock compensation and other (note 9) (in shares)		85,000
Employee stock compensation and other (note 10)	908		908
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Issuance of Equity by Subsidiary to Noncontrolling Interests	$ (2,506)			(228)
Changes to non-controlling interest from equity contributions and other (note 2)							(2,734)
Ending Balance (in shares) at Jun. 30, 2019	100,699,409	100,784,000
Ending Balance at Jun. 30, 2019	$ 2,672,625		$ 1,049,531	$ (361,162)			$ 2,005,399
Accumulated other comprehensive loss	$ (21,143)				$ (21,143)

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The unaudited interim consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (or GAAP ). They include the accounts of Teekay Corporation (or Teekay ), which is incorporated under the laws of the Republic of the Marshall Islands, its wholly-owned or controlled subsidiaries and any variable interest entities (or VIEs ) of which it is the primary beneficiary (collectively, the Company ). Certain of Teekay’s significant non-wholly owned subsidiaries are consolidated in these financial statements even though Teekay owns less than a 50% ownership interest in the subsidiaries. These significant subsidiaries include the publicly-traded subsidiaries Teekay LNG Partners L.P. (or Teekay LNG ) and Teekay Tankers Ltd. (or Teekay Tankers ). Certain information and footnote disclosures required by GAAP for complete annual financial statements have been omitted from these unaudited interim consolidated financial statements and, therefore, these financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2018 , included in the Company’s Annual Report on Form 20-F, filed with the U.S. Securities and Exchange Commission (or SEC ) on April 1, 2019. In the opinion of management, these unaudited interim consolidated financial statements reflect all adjustments, consisting of a normal recurring nature, necessary to present fairly, in all material respects, the Company’s consolidated financial position, results of operations, cash flows and changes in total equity for the interim periods presented. The results of operations for the three and six months ended June 30, 2019 , are not necessarily indicative of those for a full fiscal year. Significant intercompany balances and transactions have been eliminated upon consolidation. The preparation of 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 could differ from those estimates. It is possible that the amounts recorded as derivative assets and liabilities could vary by material amounts prior to their settlement.

Accounting Pronouncements

Accounting Pronouncements	6 Months Ended
	Jun. 30, 2019
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements, Policy	Recent Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (or 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 became effective for the Company on January 1, 2019. FASB issued an additional accounting standards update in July 2018 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 and providing an optional practical expedient to lessors not to separate lease and non-lease components of a contract if certain criteria are met. In addition, the Company early adopted ASU 2019-01, which provides an exception for lessors who are not manufacturers or dealers to determine the fair value of leased property using the underlying asset's cost, instead of fair value. The Company has elected to use this new optional transitional approach. To determine the cumulative effect adjustment, the Company has not reassessed lease classification, initial direct costs for any existing leases, or whether any expired or existing contracts are or contain leases. The Company identified the following differences: • The adoption of ASU 2016-02 results in a change in the accounting method for the lease portion of the daily charter hire for the chartered-in vessels by the Company and the Company's equity-accounted joint ventures accounted for as operating leases with firm periods of greater than one year, as well as a small number of office leases. On January 1, 2019, a right-of-use asset of $170.0 million and a lease liability of $170.0 million were recognized, equal to the present value of future minimum lease payments. On June 30, 2019 , the right-of-use asset relating to vessels was $173.5 million and the lease liability was $173.5 million . The carrying value of the Company's chartered-in vessels has also been reclassified from other non-current assets ( $12.2 million – June 30, 2019 and $13.7 million – January 1, 2019) and from other long-term liabilities ($ nil – June 30, 2019 and $0.9 million – January 1, 2019) to the right-of-use asset. In addition, on June 30, 2019 the right-of-use asset relating to office leases was $8.5 million and is presented in other non-current assets. The lease liability relating to office leases, presented in accounts payable, accrued liabilities and other and other long-term liabilities, was $8.7 million , and $0.2 million was reflected as a foreign exchange loss during the six months ended June 30, 2019 . Under ASU 2016-02, the Company and the Company's equity-accounted joint ventures recognize 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. This resulted in an increase in the Company's and its equity-accounted joint ventures' assets and liabilities. The pattern of expense recognition of chartered-in vessels is expected to remain substantially unchanged from the prior policy, unless the right-of-use asset becomes impaired. • The adoption of ASU 2016-02 results in the recognition of revenue from the reimbursement of scheduled dry-dock expenditures, where such charter contract is accounted for as an operating lease, occurring upon completion of the scheduled dry-dock, instead of ratably over the period between the previous scheduled dry-dock and the next scheduled dry-dock. This change decreased investment in and loans to equity-accounted investments by $3.0 million , and total equity by $3.0 million as at June 30, 2019 . The cumulative decrease to opening equity as at January 1, 2019 was $3.0 million . • The adoption of ASU 2016-02 results in direct financing lease payments received being presented as an operating cash inflow instead of an investing cash inflow in the consolidated statement of cash flows. Direct financing lease payments received during the three and six months ended June 30, 2019 were $3.0 million and $6.1 million , respectively ( three and six months ended June 30, 2018 – $2.8 million and $5.2 million , respectively). • The adoption of ASU 2016-02 results in sale and leaseback transactions where the seller lessee has a fixed price repurchase option or other situations where the leaseback would be classified as a finance lease being accounted for as a failed sale of the vessel and a failed purchase of the vessel by the buyer lessor. Prior to the adoption of ASU 2016-02 such transactions were accounted for as a completed sale and a completed purchase. Consequently, for such transactions, the Company does not derecognize the vessel sold and continues to depreciate the vessel as if it was the legal owner. Proceeds received from the sale of the vessel are recognized as an obligation related to finance lease, and bareboat charter hire payments made by the Company to the lessor are allocated between interest expense and principal repayments on the obligation related to finance lease . The adoption of ASU 2016-02 has resulted in the sale and leaseback of the Yamal Spirit , the Cascade Spirit and the Aspen Spirit during the first half of 2019 being accounted for as failed sales and unlike the 22 sale-leaseback transactions entered in prior years, the Company is not considered as holding a variable interest in the buyer lessor entity and thus, does not consolidate the buyer lessor entity (see Note 6 ). The Company's floating production, storage and offloading (or FPSO ) contracts, time charters and voyage charters include both a lease component, consisting of the lease of the vessel, and a non-lease component, consisting of the operation of the vessel for the customer. The Company has elected not to separate the non-lease component from the lease component for all such charters, where the lease component is classified as an operating lease and certain other required criteria are met, and to account for the combined component as an operating lease in accordance with Accounting Standards Codification (or ASC ) 842 Leases . In August 2017, the FASB issued Accounting Standards Update 2017-12, Derivatives and Hedging - Targeted Improvements to Accounting for Hedging Activities (or ASU 2017-12 ). ASU 2017-12 eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires, for qualifying hedges, the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. The guidance also modifies the accounting for components excluded from the assessment of hedge effectiveness, eases documentation and assessment requirements and modifies certain disclosure requirements. ASU 2017-12 became effective for the Company on January 1, 2019. This change decreased accumulated other comprehensive (loss) income by $4.8 million as at January 1, 2019, and correspondingly increased opening equity as at January 1, 2019 by $4.8 million . 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 is effective for the Company on January 1, 2020, with a modified-retrospective approach. The Company is currently evaluating the effect of adopting this new guidance.

Revenue

Revenue	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenues	Revenues The Company’s primary source of revenue is chartering its vessels and offshore units to its customers. The Company utilizes four primary forms of contracts, consisting of time-charter contracts, voyage charter contracts, bareboat charter contracts and contracts for FPSO units. The Company also generates revenue from the management and operation of vessels owned by third parties and by equity-accounted investments as well as providing corporate management services to such entities. For a description of these contracts, see "Item 18 – Financial Statements: Note 2" in the Company’s Annual Report on Form 20-F for the year ended December 31, 2018 . Revenue Table The following tables contain the Company’s revenue for the three and six months ended June 30, 2019 and 2018 , by contract type, by segment and by business lines within segments. Three Months Ended June 30, 2019 Teekay LNG Liquefied Gas Carriers Teekay LNG Conventional Tankers Teekay Tankers Conventional Tankers Teekay Parent Offshore Production Teekay Parent Other Eliminations and Other Total $ $ $ $ $ $ $ Time charters 133,684 2,369 1,456 — 8,078 (2,487 ) 143,100 Voyage charters 8,858 — 186,805 — — — 195,663 Bareboat charters 6,129 — — — — — 6,129 FPSO contracts — — — 57,828 — — 57,828 Management fees and other 2,020 — 14,016 — 39,911 (1,000 ) 54,947 150,691 2,369 202,277 57,828 47,989 (3,487 ) 457,667 Three Months Ended June 30, 2018 Teekay LNG Liquefied Gas Carriers Teekay LNG Conventional Tankers Teekay Tankers Conventional Tankers Teekay Parent Offshore Production Teekay Parent Other Eliminations and Other Total $ $ $ $ $ $ $ Time charters 96,857 4,316 17,384 — 7,588 (1,439 ) 124,706 Voyage charters 6,767 5,719 144,328 — — — 156,814 Bareboat charters 5,734 — — — — — 5,734 FPSO contracts — — — 66,429 — — 66,429 Management fees and other 2,814 108 9,947 — 38,595 495 51,959 112,172 10,143 171,659 66,429 46,183 (944 ) 405,642 Six Months Ended June 30, 2019 Teekay LNG Liquefied Gas Carriers Teekay LNG Conventional Tankers Teekay Tankers Conventional Tankers Teekay Parent Offshore Production Teekay Parent Other Eliminations and Other Total $ $ $ $ $ $ $ Time charters 264,459 5,131 4,866 — 14,347 (2,487 ) 286,316 Voyage charters 18,018 — 403,222 — — — 421,240 Bareboat charters 12,191 — — — — — 12,191 FPSO contracts — — — 107,266 — — 107,266 Management fees and other 3,005 — 26,690 — 84,301 (2,129 ) 111,867 297,673 5,131 434,778 107,266 98,648 (4,616 ) 938,880 Six Months Ended June 30, 2018 Teekay LNG Liquefied Gas Carriers Teekay LNG Conventional Tankers Teekay Tankers Conventional Tankers Teekay Parent Offshore Production Teekay Parent Other Eliminations and Other Total $ $ $ $ $ $ $ Time charters 190,316 9,714 39,494 — 20,682 (9,418 ) 250,788 Voyage charters 10,390 10,470 279,970 — — — 300,830 Bareboat charters 11,111 — — — — — 11,111 FPSO contracts — — — 132,399 — — 132,399 Management fees and other 5,404 216 20,660 — 77,445 811 104,536 217,221 20,400 340,124 132,399 98,127 (8,607 ) 799,664 The following table contains the Company's total revenue for the three and six months ended June 30, 2019 and 2018 , by contracts or components of contracts accounted for as leases and those not accounted for as leases. Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Lease revenue Lease revenue from lease payments of operating leases 354,410 302,010 737,553 596,565 Interest income on lease receivables 12,969 9,954 25,763 19,914 Variable lease payments – cost reimbursements (1) 13,307 10,169 25,314 18,677 Variable lease payments – other (2) 16,320 27,426 27,144 51,708 397,006 349,559 815,774 686,864 Non-lease revenue Non-lease revenue – related to sales-type or direct financing leases 5,714 4,124 11,239 8,264 Management fees and other income 54,947 51,959 111,867 104,536 60,661 56,083 123,106 112,800 Total 457,667 405,642 938,880 799,664 (1) Reimbursement for vessel operating expenditures and dry-docking expenditures received from the Company's customers relating to such costs incurred by the Company to operate the vessel for the customer. (2) Compensation from time-charter contracts based on spot market rates in excess of a base daily hire amount, 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. Operating Leases As at June 30, 2019 , the minimum scheduled future rentals to be received by the Company in each of the next five years for the lease and non-lease elements related to time-charters, bareboat charters and FPSO contracts that were accounted for as operating leases were approximately $387.5 million (remainder of 2019 ), $647.4 million ( 2020 ), $533.2 million ( 2021 ), $429.7 million ( 2022 ) and $319.7 million ( 2023 ). As at December 31, 2018 , the minimum scheduled future rentals to be received by the Company in each of the next five years for the lease and non-lease elements related to time-charters, bareboat charters and FPSO contracts that were accounted for as operating leases were approximately $630.8 million ( 2019 ), $524.6 million ( 2020 ), $457.5 million ( 2021 ), $382.0 million ( 2022 ) and $291.8 million ( 2023 ). 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 June 30, 2019 or after December 31, 2018 , as applicable, revenue from unexercised option periods of contracts that existed on June 30, 2019 or on December 31, 2018 , as applicable, revenue from vessels in the Company’s equity-accounted investments, or variable or contingent revenues accounted for under ASC 842 Leases. In addition, minimum scheduled future operating lease revenues presented in this paragraph have been reduced by estimated off-hire time for any periodic maintenance. The amounts may vary given unscheduled future events such as vessel maintenance. The net carrying amount of the vessels employed on time-charter contracts, bareboat charter contracts and FPSO contracts that have been accounted for as operating leases at June 30, 2019 , was $3.5 billion ( December 31, 2018 – $3.4 billion ). At June 30, 2019 , the cost and accumulated depreciation of such vessels were $4.3 billion ( December 31, 2018 – $4.3 billion ) and $0.9 billion ( December 31, 2018 – $0.8 billion ), respectively. Net Investment in Direct Financing Leases Teekay LNG's time-charter contracts accounted for as direct financing leases contain both a lease component (lease of the vessel) and a non-lease component (operation of the vessel). Teekay LNG 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 Teekay LNG 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 Teekay LNG 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. Teekay LNG has three liquefied natural gas (or LNG ) carriers, excluding vessels in its equity-accounted joint ventures, which are accounted for as direct financing leases. For a description of Teekay LNG's LNG carriers accounted for as direct financing leases, see "Item 18 – Financial Statements: Note 2" to the Company's Annual Report on Form 20-F for the year ended December 31, 2018. The following table lists the components of Teekay LNG's net investments in direct financing leases: June 30, 2019 December 31, 2018 $ $ Total minimum lease payments to be received 865,333 897,130 Estimated unguaranteed residual value of leased properties 291,098 291,098 Initial direct costs and other 312 329 Less unearned revenue (592,058 ) (613,394 ) Total 564,685 575,163 Less current portion (13,082 ) (12,635 ) Long-term portion 551,603 562,528 As at June 30, 2019 , estimated minimum lease payments to be received by Teekay LNG related to its direct financing leases in each of the next five years are approximately $32.3 million ( 2019 ), $64.2 million ( 2020 ), $64.2 million ( 2021 ), $64.2 million ( 2022 ), $64.0 million ( 2023 ) and an aggregate of $576.4 million thereafter. The leases are scheduled to end between 2029 and 2039. As at December 31, 2018 , estimated minimum lease payments to be received by Teekay LNG related to its direct financing leases in each of the next five years are approximately $64.2 million ( 2019 ), $64.3 million ( 2020 ), $64.2 million ( 2021 ), $64.2 million ( 2022 ), $64.0 million ( 2023 ) and an aggregate of $576.2 million thereafter. The leases are scheduled to end between 2029 and 2039. Contract Liabilities The Company enters into certain customer contracts that result in situations where the customer will pay consideration upfront for performance to be provided in the following month or months. These receipts are contract liabilities and are presented as deferred revenue until performance is provided. As at June 30, 2019 , December 31, 2018 , June 30, 2018 and on transition to ASC 606 on January 1, 2018, there were contract liabilities of $27.2 million , $26.4 million , $23.3 million and $29.5 million , respectively. During the three months ended June 30, 2019 and June 30, 2018 , the Company recognized $20.4 million and $20.5 million of revenue, respectively, that was recognized as a contract liability at the beginning of such three-month periods. During the six months ended June 30, 2019 and June 30, 2018 , the Company recognized $26.4 million and $28.9 million of revenue, respectively, that was recognized as a contract liability at the beginning of such six-month periods.

Related Party Tranactions

Related Party Tranactions	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Deconsolidation of Teekay Offshore	Related Party Transactions On May 8, 2019, Teekay sold to Brookfield Business Partners L.P. (or Brookfield ) all of the Company’s remaining interests in Teekay Offshore (or the 2019 Brookfield Transaction ), which included the Company’s 49% general partner interest, common units, warrants, and an outstanding $25 million loan from the Company to Teekay Offshore (described below), for total cash proceeds of $100 million . Prior to the 2019 Brookfield Transaction, Teekay Offshore was a related party of Teekay. Subsequent to the deconsolidation of Teekay Offshore in September 2017 and prior to the 2019 Brookfield Transaction, the Company accounted for its investment in Teekay Offshore's general partner and common units under the equity method of accounting. Based on the 2019 Brookfield Transaction, the Company remeasured its investment in Teekay Offshore to fair value at March 31, 2019 based on the Teekay Offshore publicly-traded unit price at that date, resulting in a write-down of $64.9 million reflected in equity loss on the Company's consolidated statements of loss for the six months ended June 30, 2019 . The Company recognized a loss on sale of $8.9 million on completion of the 2019 Brookfield Transaction in May 2019. As at June 30, 2019 , Teekay Offshore is no longer a party related to Teekay. Advances from Teekay to Teekay Offshore as at December 31, 2018 were $83.1 million and advances from Teekay Offshore to Teekay as at December 31, 2018 were $59.3 million . Such amounts were included in current portion of loans to equity-accounted investments and loans from equity-accounted investments, respectively, on the Company's consolidated balance sheet as at December 31, 2018 . Advances from Teekay to Teekay Offshore and advances from Teekay Offshore to Teekay were included in accounts receivable and accounts payable, respectively, on the Company's consolidated balance sheet as at June 30, 2019 . In March 2018, Teekay Offshore entered into a loan agreement for a $125.0 million senior unsecured revolving credit facility, of which up to $25.0 million was provided by Teekay and up to $100.0 million was provided by Brookfield. Teekay’s $25.0 million loan to Teekay Offshore was among the assets sold by Teekay to Brookfield in the 2019 Brookfield Transaction. On September 25, 2017, Teekay, Teekay Offshore and Brookfield completed a strategic partnership (or the 2017 Brookfield Transaction ), which resulted in the deconsolidation of Teekay Offshore as of that date. Until December 31, 2017, Teekay and its wholly-owned subsidiaries directly and indirectly provided substantially all of Teekay Offshore’s ship management, commercial, technical, strategic, business development and administrative service needs. On January 1, 2018, as part of the 2017 Brookfield Transaction, Teekay Offshore acquired a 100% ownership interest in seven subsidiaries (or the Transferred Subsidiaries ) of Teekay at carrying value. The Company recognized a loss of $7.1 million for the six months ended June 30, 2018 related to the sale of the Transferred Subsidiaries and the resultant release of accumulated pension losses from accumulated other comprehensive income, which is recorded in loss on deconsolidation of Teekay Offshore on the Company's consolidated statements of loss . Specifically, the Transferred Subsidiaries provided ship management, commercial, technical, strategic, business development and administrative services to Teekay Offshore, primarily related to Teekay Offshore's FPSO units, shuttle tankers and floating storage and offtake (or FSO ) units. Subsequent to their transfer to Teekay Offshore, the Transferred Subsidiaries continue to provide ship management, commercial, technical, strategic, business development and administrative services to Teekay, primarily related to Teekay's FPSO units. Teekay and certain of its subsidiaries, other than the Transferred Subsidiaries, continue to provide certain other ship management, commercial, technical, strategic and administrative services to Teekay Offshore. Revenues recognized by the Company for services provided to Teekay Offshore for the periods from April 1, 2019 to May 8, 2019 and January 1, 2019 to May 8, 2019 were $2.3 million and $7.6 million , respectively ( three and six months ended June 30, 2018 – $4.5 million and $11.1 million , respectively), which were recorded in revenues on the Company's consolidated statements of loss . Fees paid by the Company to Teekay Offshore for services provided by Teekay Offshore to the Company for the periods from April 1, 2019 to May 8, 2019 and January 1, 2019 to May 8, 2019 were $3.3 million and $9.6 million , respectively ( three and six months ended June 30, 2018 – $6.8 million and $13.3 million , respectively), which were recorded in vessel operating expenses and general and administrative expenses on the Company's consolidated statements of loss . As at June 30, 2019 , two shuttle tankers and three FSO units of Teekay Offshore were employed on long-term time-charter-out or bareboat contracts to subsidiaries of Teekay. Time-charter hire expenses paid by the Company to Teekay Offshore for the periods from April 1, 2019 to May 8, 2019 and January 1, 2019 to May 8, 2019 were $6.1 million and $20.8 million , respectively ( three and six months ended June 30, 2018 – $14.0 million and $28.0 million , respectively). In September 2018, Teekay LNG entered into an agreement with its 52% -owned joint venture with Marubeni Corporation (or the Teekay LNG-Marubeni Joint Venture ) to charter in one of Teekay LNG-Marubeni Joint Venture's LNG carriers, the Magellan Spirit , for a period of two years at a fixed-rate. Time-charter hire expense for the three and six months ended June 30, 2019 were $3.1 million and $8.7 million , respectively. The Company provides ship management and corporate services to certain of its equity-accounted joint ventures that own and operate LNG carriers on long-term charters. In addition, the Company is reimbursed for costs incurred by the Company for its seafarers operating these LNG carriers. During the three and six months ended June 30, 2019 , the Company earned $16.8 million and $32.6 million , respectively ( three and six months ended June 30, 2018 – $13.1 million and $25.7 million , respectively), of fees pursuant to these management agreements and reimbursement of costs.

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Segment Reporting	Segment Reporting The Company’s segments are described in "Item 18 – Financial Statements: Note 3" to the Company’s Annual Report on Form 20-F for the year ended December 31, 2018 . The Company allocates capital and assesses performance from the separate perspectives of its two publicly-traded subsidiaries Teekay LNG and Teekay Tankers (together, the Controlled Daughter Entities ), Teekay and its remaining subsidiaries (or Teekay Parent ), and, prior to the completion of the 2019 Brookfield Transaction, its equity-accounted investment in Teekay Offshore, as well as from the perspective of the Company's lines of business. The primary focus of the Company’s organizational structure, internal reporting and allocation of resources by the chief operating decision maker is on the Controlled Daughter Entities, Teekay Parent and, prior to the completion of the 2019 Brookfield Transaction, its equity-accounted investment in Teekay Offshore, (the Legal Entity approach ), and its segments are presented accordingly on this basis. The Company (which excludes Teekay Offshore) has three primary lines of business: (1) offshore production (FPSO units), (2) LNG and liquefied petroleum gas (or LPG ) carriers, and (3) conventional tankers. The Company manages these businesses for the benefit of all stakeholders. The Company incorporates the primary lines of business within its segments, as in certain cases there is more than one line of business in each Controlled Daughter Entity and the Company believes this information allows a better understanding of the Company’s performance and prospects for future net cash flows. The following table includes the Company’s revenues by segment for the three and six months ended June 30, 2019 and 2018 : Revenues Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Teekay LNG Liquefied Gas Carriers (1) 150,691 112,172 297,673 217,221 Conventional Tankers 2,369 10,143 5,131 20,400 153,060 122,315 302,804 237,621 Teekay Tankers Conventional Tankers (1) 202,277 171,659 434,778 340,124 Teekay Parent Offshore Production 57,828 66,429 107,266 132,399 Other 47,989 46,183 98,648 98,127 105,817 112,612 205,914 230,526 Eliminations and other (3,487 ) (944 ) (4,616 ) (8,607 ) 457,667 405,642 938,880 799,664 (1) The amounts in the table below represent revenue earned by each segment from other segments within the group. During 2019, Teekay Tankers' ship-to-ship transfer business provided operational and maintenance services to Teekay LNG Bahrain Operations L.L.C., an entity wholly-owned by Teekay LNG, for the LNG receiving and regasification terminal in Bahrain. Also during 2019, the Magellan Spirit was chartered by Teekay LNG to Teekay Parent. During 2018, certain vessels were chartered by Teekay LNG to Teekay Parent. Such intersegment revenue for the three and six months ended June 30, 2019 and 2018 is as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Teekay LNG - Liquefied Gas Carriers 2,487 1,439 2,487 9,418 Teekay Tankers - Conventional Tankers 1,000 — 2,129 — 3,487 1,439 4,616 9,418 The following table includes the Company’s income (loss) from vessel operations by segment for the three and six months ended June 30, 2019 and 2018 : Income (Loss) from Vessel Operations (1) Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Teekay LNG Liquefied Gas Carriers 74,244 9,445 144,687 53,990 Conventional Tankers 433 1,060 (649 ) (18,343 ) 74,677 10,505 144,038 35,647 Teekay Tankers Conventional Tankers 5,051 (13,415 ) 37,148 (21,836 ) Teekay Parent Offshore Production (5,987 ) 5,541 (18,544 ) 12,423 Other (2,278 ) (710 ) (6,947 ) (5,808 ) (8,265 ) 4,831 (25,491 ) 6,615 71,463 1,921 155,695 20,426 (1) Includes direct general and administrative expenses and indirect general and administrative expenses (allocated to each segment based on estimated use of corporate resources). Prior to its sale in May 2019, the Company accounted for its investment in Teekay Offshore's general partner and common units using the equity method and recognized equity losses in respect of Teekay Offshore for the periods from April 1, 2019 to May 8, 2019 and January 1, 2019 to May 8, 2019 of $ nil and $3.1 million , respectively ( three and six months ended June 30, 2018 – equity losses of $9.3 million and $8.7 million , respectively). The Company wrote-down the investment in Teekay Offshore by $64.9 million in the six months ended June 30, 2019 and recognized a loss on sale of $8.9 million in the three and six months ended June 30, 2019 . A reconciliation of total segment assets to total assets presented in the accompanying unaudited consolidated balance sheets is as follows: June 30, 2019 December 31, 2018 $ $ Teekay LNG – Liquefied Gas Carriers 5,207,739 5,188,088 Teekay LNG – Conventional Tankers 13,748 39,450 Teekay Tankers – Conventional Tankers 2,118,499 2,106,169 Teekay Parent – Offshore Production 361,785 311,550 Teekay Parent – Conventional Tankers — 13,056 Teekay Parent – Other 91,683 25,224 Teekay Offshore — 233,225 Cash and cash equivalents 235,199 424,169 Other assets not allocated 130,348 70,153 Eliminations (32,983 ) (19,414 ) Consolidated total assets 8,126,018 8,391,670

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Obligations relating to Finance Leases [Line Items]
Finance Lease, Liability, Maturity [Table Text Block]	As at June 30, 2019 and December 31, 2018 , the total remaining commitments related to the financial liabilities of Teekay Tankers' Suezmax, Aframax and LR2 product tankers, including the amounts to be paid for the related purchase obligations, approximated $632.0 million ( December 31, 2018 – $557.1 million ), including imputed interest of $203.2 million ( December 31, 2018 – $181.8 million ), repayable from 2019 through 2030, as indicated below: Commitments At June 30, 2019 At December 31, 2018 Year $ $ Remainder of 2019 30,336 47,962 2020 56,364 47,373 2021 56,202 47,237 2022 56,193 47,230 2023 56,184 47,222 Thereafter 376,750 320,064
Leases [Text Block]	6 . Leases Obligations Related to Finance Leases June 30, 2019 December 31, 2018 $ $ Teekay LNG LNG Carriers 1,399,796 1,274,569 Suezmax Tanker — 23,987 Teekay Tankers Suezmax Tankers 222,859 165,145 Aframax Tankers 178,518 184,021 LR2 Product Tanker 25,559 26,123 Total obligations related to finance leases 1,826,732 1,673,845 Less current portion (89,922 ) (102,115 ) Long-term obligations related to finance leases 1,736,810 1,571,730 Teekay LNG As at June 30, 2019 , Teekay LNG was a party to finance leases on nine LNG carriers ( December 31, 2018 – eight LNG carriers). Upon delivery of these nine LNG carriers between February 2016 and January 2019, Teekay LNG sold these vessels to third parties (or Lessors ) and leased them back under 10 - to 15 -year bareboat charter contracts ending in 2026 through to 2034. At the inception of these leases, the weighted-average interest rate implicit in these leases was 5.2% . The bareboat charter contracts are presented as obligations related to finance leases on the Company's consolidated balance sheets and have purchase obligations at the end of the lease terms. Teekay LNG consolidates eight of the nine Lessors for financial reporting purposes as variable interest entities. Teekay LNG understands that these vessels and lease operations are the only assets and operations of the Lessors. Teekay LNG operates the vessels during the lease term and as a result, is considered to be, under GAAP, the Lessor's primary beneficiary. The liabilities of the eight Lessors are loans and are non-recourse to Teekay LNG. The amounts funded to the eight Lessors in order to purchase the vessels materially match the funding to be paid by Teekay LNG's subsidiaries under the sale-leaseback transactions. As a result, the amounts due by Teekay LNG's subsidiaries to the eight Lessors have been included in obligations related to finance leases as representing the Lessors' loans. During January 2019, Teekay LNG sold the Yamal Spirit and leased it back for a period of 15 years, with an option granted to Teekay LNG to extend the lease term by an additional five years. Teekay LNG is required to purchase the vessel at the end of the lease term. Subsequent to the adoption of ASU 2016-02 on January 1, 2019, sale-leaseback transactions where the lessee has a purchase obligation are treated as a failed sale. Consequently, Teekay LNG has not derecognized the vessel and continues to depreciate the asset as if Teekay LNG was the legal owner. Proceeds received from the sale are set up as a financial liability and bareboat charter hire payments made by Teekay LNG to the Lessor are allocated between interest expense and principal repayments on the financial liability. The obligations of Teekay LNG under the bareboat charter contracts for the nine LNG carriers are guaranteed by Teekay LNG. In addition, the guarantee agreements require Teekay LNG to maintain minimum levels of tangible net worth and aggregate liquidity, and not to exceed a maximum amount of leverage. As at June 30, 2019 , Teekay LNG was in compliance with all covenants in respect of the obligations related to its finance leases. As at June 30, 2019 and December 31, 2018 , the remaining commitments related to the financial liabilities of these nine LNG carriers ( December 31, 2018 – eight LNG carriers) including the amounts to be paid for the related purchase obligations, approximated $1.9 billion ( December 31, 2018 – $1.7 billion ), including imputed interest of $495.6 million ( December 31, 2018 – $435.3 million ), repayable for the remainder of 2019 through 2034, as indicated below: Commitments At June 30, 2019 At December 31, 2018 Year $ $ Remainder of 2019 67,962 119,517 2020 134,915 118,685 2021 133,542 117,772 2022 132,312 116,978 2023 131,237 116,338 Thereafter 1,295,440 1,120,670 As at December 31, 2018 , Teekay LNG was a party, as lessee, to a finance lease on one Suezmax tanker, the Toledo Spirit . As at December 31, 2018 , the remaining commitments related to the finance lease for the Suezmax tanker, including the related purchase obligation, approximated $24.2 million , including imputed interest of $0.2 million , repayable in 2019. In January 2019, the charterer, who is also the owner, sold the Toledo Spirit to a third party which resulted in Teekay LNG returning the vessel to its owner and the obligation related to finance lease concurrently being extinguished. Teekay Tankers In May 2019, Teekay Tankers completed a $63.7 million sale-leaseback financing transaction with a financial institution relating to two of Teekay Tankers' Suezmax tankers, the Aspen Spirit and Cascade Spirit . In November 2018, Teekay Tankers completed an $84.7 million sale-leaseback financing transaction with a financial institution relating to four of Teekay Tankers' vessels, consisting of two Aframax tankers, one Suezmax tanker and one Long Range 2 (or LR2 ) product tanker, the Explorer Spirit , Navigator Spirit , Pinnacle Spirit and Trysil Spirit . In September 2018, Teekay Tankers completed a $156.6 million sale-leaseback financing transaction with a financial institution relating to six of its Aframax tankers, the Blackcomb Spirit, Emerald Spirit, Garibaldi Spirit, Peak Spirit, Tarbet Spirit and Whistler Spirit . In July 2017, Teekay Tankers completed a $153.0 million sale-leaseback financing transaction with a financial institution relating to four of its Suezmax tankers, the Athens Spirit , the Beijing Spirit , the Moscow Spirit and the Sydney Spirit . Under these arrangements, Teekay Tankers transferred the vessels to subsidiaries of the financial institutions (or collectively, the Lessors ), and leased the vessels back from the Lessors on bareboat charters ranging from nine - to 12 -year terms. Teekay Tankers is obligated to purchase six of the Aframax vessels and two of the Suezmax vessels upon maturity of their respective bareboat charters. Teekay Tankers also has the option to purchase each of the 16 tankers at various times starting between July 2020 and November 2021 until the end of their respective lease terms. Teekay Tankers consolidates 14 of the 16 Lessors for financial reporting purposes as VIEs. Teekay Tankers understands that these vessels and lease operations are the only assets and operations of the Lessors. Teekay Tankers operates the vessels during the lease terms, and as a result, is considered to be the Lessor's primary beneficiary. The liabilities of the 14 Lessors are loans that are non-recourse to Teekay Tankers. The amounts funded to the 14 Lessors in order to purchase the vessels materially match the funding to be paid by Teekay Tankers' subsidiaries under these leaseback transactions. As a result, the amounts due by Teekay Tankers' subsidiaries to the 14 Lessors considered as VIEs have been included in obligations related to finance leases as representing the Lessors' loans. Subsequent to the adoption of ASU 2016-02 on January 1, 2019, sale and leaseback transactions where the lessee has a purchase obligation are treated as a failed sale. Consequently, Teekay Tankers has not derecognized the Aspen Spirit and Cascade Spirit and continues to depreciate the assets as if it was the legal owner. Proceeds received from the sale are set up as an obligation related to finance lease and bareboat charter hire payments made by Teekay Tankers to the Lessor are allocated between interest expense and principal repayments on the obligation related to finance lease. The bareboat charters related to each of these vessels require that Teekay Tankers maintain minimum liquidity (cash, cash equivalents and undrawn committed revolving credit lines with at least six months to maturity) of $35.0 million and at least 5.0% of Teekay Tankers' consolidated debt and obligations related to finance leases (excluding applicable security deposits reflected in restricted cash – non-current on the Company's consolidated balance sheets). Four of the bareboat charters require Teekay Tankers to maintain, for each vessel, a hull coverage ratio of 90% of the total outstanding principal balance during the first three years of the lease period and 100% of the total outstanding principal balance thereafter. As at June 30, 2019 , this ratio was approximately 112% ( December 31, 2018 – 101% ). Six of the bareboat charters require Teekay Tankers to maintain, for each vessel, a hull coverage ratio of 75% of the total outstanding principal balance during the first year of the lease period, 78% for the second year, 80% for the following two years and 90% of the total outstanding principal balance thereafter. As at June 30, 2019 , this ratio was approximately 102% ( December 31, 2018 – 91% ). Four of the bareboat charters also require Teekay Tankers to maintain, for each vessel, a hull overage ratio of 100% of the total outstanding principal balance. As at June 30, 2019 , this ratio was approximately 133% ( December 31, 2018 – 122% ). The remaining two bareboat charters also require Teekay Tankers to maintain, for each vessel, a minimum hull coverage ratio of 75% of the total outstanding principal balance during the first year of the lease period, 78% for the second year, 80% for the following two years and 90% of the total outstanding principal balance thereafter. As at June 30, 2019 , this ratio was approximately 97% . Such requirements are assessed annually with reference to vessel valuations compiled by one or more agreed upon third parties. As at June 30, 2019 , Teekay Tankers was in compliance with all covenants in respect of its obligations related to finance leases. The weighted average interest rate on Teekay Tankers’ obligations related to finance leases as at June 30, 2019 was 7.7% ( December 31, 2018 – 7.5% ). As at June 30, 2019 and December 31, 2018 , the total remaining commitments related to the financial liabilities of Teekay Tankers' Suezmax, Aframax and LR2 product tankers, including the amounts to be paid for the related purchase obligations, approximated $632.0 million ( December 31, 2018 – $557.1 million ), including imputed interest of $203.2 million ( December 31, 2018 – $181.8 million ), repayable from 2019 through 2030, as indicated below: Commitments At June 30, 2019 At December 31, 2018 Year $ $ Remainder of 2019 30,336 47,962 2020 56,364 47,373 2021 56,202 47,237 2022 56,193 47,230 2023 56,184 47,222 Thereafter 376,750 320,064 Operating Lease Liabilities The Company charters-in vessels from other vessel owners on time-charter-in and bareboat charter contracts, whereby the vessel owner provides use of the vessel to the Company, and, in the case of time-charter-in contracts, also operates the vessel for the Company. A time-charter-in contract is typically for a fixed period of time, although in certain cases the Company may have the option to extend the charter. The Company typically pays the owner a daily hire rate that is fixed over the duration of the charter. The Company is generally not required to pay the daily hire rate for time-charters during periods the vessel is not able to operate. The Company 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 Company 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 Company 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 Company calculates a rate excluding the operating component based on a market time-charter rate information 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 Company’s incremental borrowing rate, which is based on the fixed interest rate the Company could obtain when entering into a secured loan facility of similar terms for an amount equal to the total minimum lease payments. The bareboat charter contracts contain only a lease component. With respect to time-charter-in and bareboat charter contracts with an original term of more than one year, for the three and six months ended June 30, 2019 , the Company incurred $23.7 million and $48.8 million , respectively, of time-charter and bareboat hire expense related to these time-charter and bareboat charter contracts, of which $16.4 million and $33.7 million , respectively, were allocable to the lease component, and $7.3 million and $15.1 million , respectively, were allocable to the non-lease component. The amounts allocable 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 three and six months ended June 30, 2019 . Two of Teekay Tankers' time-charter-in contracts each have an option to extend the charter for an additional one-year term. Since it is not reasonably certain that Teekay Tankers will exercise the options, the lease components of the options are not recognized as part of the right-of-use assets and lease liabilities. As at June 30, 2019 , the weighted-average remaining lease term and weighted-average discount rate for these time-charter-in and bareboat charter contracts were 3.0 years and 6.2% , respectively. The Company has elected to recognize the lease payments of short-term leases in its consolidated statements of 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. The Company considers as short-term leases those with an original term of one year or less, excluding leases with an option to extend the lease for greater than one year or an option to purchase the underlying asset where the lessee is deemed reasonably certain to exercise the applicable option. For the three and six months ended June 30, 2019 , the Company incurred $4.9 million and $9.2 million , respectively, of time-charter hire expense related to time-charter-in contracts classified as short-term leases. During the six months ended June 30, 2019 , Teekay Tankers chartered in two LR2 vessels each for a period of 24 months , which resulted in the Company recognizing right-of-use assets of $14.7 million on the lease commencement dates. A maturity analysis of the Company’s operating lease liabilities from time-charter-in and bareboat charter contracts (excluding short-term leases) at June 30, 2019 is as follows: Lease Commitment Non-Lease Commitment Total Commitment Year $ $ $ Payments Remainder of 2019 36,398 17,112 53,510 2020 65,362 33,659 99,021 2021 51,672 24,913 76,585 2022 22,978 8,189 31,167 2023 9,227 — 9,227 Thereafter 5,712 — 5,712 Total payments 191,349 83,873 275,222 Less: imputed interest (17,873 ) Carrying value of operating lease liabilities 173,476 Less current portion (59,554 ) Carrying value of long-term operating lease liabilities 113,922 As at June 30, 2019 , minimum commitments to be incurred by the Company under short-term time-charter-in contracts were approximately $6.0 million (remainder of 2019) and $0.6 million (2020). As at December 31, 2018 , minimum commitments to be incurred by the Company under vessel operating leases by which the Company charters-in vessels were approximately $116.3 million ( 2019 ), $90.4 million ( 2020 ), $53.4 million ( 2021 ), $9.1 million ( 2022 ), $9.1 million ( 2023 ) and $5.6 million thereafter.
Teekay LNG
Obligations relating to Finance Leases [Line Items]
Finance Lease, Liability, Maturity [Table Text Block]	As at June 30, 2019 and December 31, 2018 , the remaining commitments related to the financial liabilities of these nine LNG carriers ( December 31, 2018 – eight LNG carriers) including the amounts to be paid for the related purchase obligations, approximated $1.9 billion ( December 31, 2018 – $1.7 billion ), including imputed interest of $495.6 million ( December 31, 2018 – $435.3 million ), repayable for the remainder of 2019 through 2034, as indicated below: Commitments At June 30, 2019 At December 31, 2018 Year $ $ Remainder of 2019 67,962 119,517 2020 134,915 118,685 2021 133,542 117,772 2022 132,312 116,978 2023 131,237 116,338 Thereafter 1,295,440 1,120,670

Write-down and Loss on Sales of

Write-down and Loss on Sales of Vessels	6 Months Ended
	Jun. 30, 2019
Property, Plant and Equipment [Abstract]
Write-down and Loss on Sales of Vessels	Write-down and Loss on Sales of Vessels The Company's write-downs and vessel sales generally relate to vessels approaching the end of their useful lives as well as other vessels it strategically sells to reduce exposure to a certain vessel class. The following tables contain the write-downs and loss on sales of vessels for the three and six months ended June 30, 2019 and 2018 : Three Months Ended June 30, Segment Asset Type Completion of Sale Date 2019 2018 Teekay LNG Segment – Liquefied Gas Carriers (1) 4 Multi-gas Carriers N/A — (33,000 ) Other — 170 Total — (32,830 ) Six Months Ended June 30, Segment Asset Type Completion of Sale Date 2019 2018 Teekay Parent Segment - Offshore Production (2) FPSO N/A (3,328 ) — Teekay LNG Segment - Conventional Tankers (3) Handymax N/A — (13,000 ) Teekay LNG Segment - Liquefied Gas Carriers (1) 4 Multi-gas Carriers N/A — (33,000 ) Teekay LNG Segment - Conventional Tankers (4) 2 Suezmaxes Oct/Dec-2018 — (5,662 ) Other — 170 Total (3,328 ) (51,492 ) (1) In June 2018, the carrying value for four of Teekay LNG's seven wholly-owned Multi-gas carriers, the Napa Spirit , Pan Spirit , Cathinka Spirit and Camilla Spirit , were written down to their estimated fair value, using appraised values, as a result of Teekay LNG's evaluation of alternative strategies for these assets, the current charter rate environment and the outlook for charter rates for these vessels. (2) In March 2019, the Company took an impairment charge in respect of certain of its FPSO-related assets. (3) In March 2018, the carrying value of the Alexander Spirit conventional tanker was written down to its estimated fair value, using an appraised value, as a result of changes in the Company's expectations of the vessel's future opportunities once its current charter contract ends in 2019. Teekay LNG commenced marketing the vessel for sale in 2019 and it is presented as held for sale in the consolidated balance sheets as at June 30, 2019 . (4) In June and August 2017, the charterer for the European Spirit and African Spirit Suezmax tankers gave formal notices to Teekay LNG that it would not exercise its one-year extension option under the charter contracts and redelivered the tankers in August 2017 and November 2017, respectively. Upon receiving these notifications, Teekay LNG commenced marketing the vessels for sale. Based on second-hand market comparable values at the time, Teekay LNG wrote down the vessels to their estimated resale values and they were presented as held for sale on the consolidated balance sheets as at December 31, 2017. During the six months ended June 30, 2018, Teekay LNG recorded a further write-down of the vessels to their estimated resale value. In the fourth quarter of 2018, Teekay LNG sold the European Spirit and African Spirit for net proceeds of $15.7 million and $12.8 million , respectively, using the net proceeds from the sales primarily to repay its existing term loans associated with the vessels.

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	Long-Term Debt June 30, 2019 December 31, 2018 $ $ Revolving Credit Facilities 500,930 642,997 Senior Notes (8.5%) due January 15, 2020 36,712 508,577 Senior Notes (9.25%) due November 15, 2022 250,000 — Convertible Senior Notes (5%) due January 15, 2023 125,000 125,000 Norwegian Krone-denominated Bonds due through August 2023 357,454 352,973 U.S. Dollar-denominated Term Loans due through 2030 1,437,688 1,536,499 Euro-denominated Term Loans due through 2024 180,115 193,781 Other U.S. Dollar-denominated loan 3,300 3,300 Total principal 2,891,199 3,363,127 Less unamortized discount and debt issuance costs (47,874 ) (43,604 ) Total debt 2,843,325 3,319,523 Less current portion (540,440 ) (242,137 ) Long-term portion 2,302,885 3,077,386 As of June 30, 2019 , the Company had five revolving credit facilities (or the Revolvers ) available, which, as at such date, provided for aggregate borrowings of up to $886.8 million , of which $385.8 million was undrawn. Interest payments are based on LIBOR plus margins; the margins ranged between 1.40% and 3.95% at June 30, 2019 and at December 31, 2018 . The aggregate amount available under the Revolvers is scheduled to decrease by $17.4 million (remainder of 2019 ), $372.4 million ( 2020 ), $329.2 million ( 2021 ) and $167.8 million ( 2022 ). The Revolvers are collateralized by first-priority mortgages granted on 36 of the Company’s vessels, together with other related security, and include a guarantee from Teekay or its subsidiaries for all but one of the Revolvers' outstanding amounts. Included in other related security are 25.2 million common units in Teekay LNG and 40.3 million Class A common shares in Teekay Tankers to secure a $150 million credit facility. The Company’s 8.5% senior unsecured notes are due January 15, 2020 with an original aggregate principal amount of $450 million (the Original Notes ). The Original Notes issued on January 27, 2010 were sold at a price equal to 99.2% of par. During 2014, the Company repurchased $57.3 million of the Original Notes. In November 2015, the Company issued an aggregate principal amount of $200 million of the Company’s 8.5% senior unsecured notes due on January 15, 2020 (or the Additional Notes ) at 99.01% of face value, plus accrued interest from July 15, 2015. The Additional Notes were an additional issuance of the Company's Original Notes (collectively referred to as the 2020 Notes ). The Additional Notes were issued under the same indenture governing the Original Notes, and are fungible with the Original Notes. The discount on the 2020 Notes is accreted through the maturity date of the notes using the effective interest rate of 8.67% per year. During 2018, the Company repurchased $84.1 million in aggregate principal amount of the 2020 Notes. During the first quarter of 2019, the Company repurchased an additional $10.9 million in aggregate principal amount of the 2020 Notes. In May 2019, the Company completed a cash tender offer and purchased $460.9 million in aggregate principal amount of the 2020 Notes and issued $250.0 million in aggregate principal amount of 9.25% senior secured notes at par due November 2022 (or the 2022 Notes ). The Company recognized a loss of $10.7 million on the purchase of the 2020 Notes in the second quarter of 2019 which is included in other (loss) income in the consolidated statements of loss . The 2022 Notes are guaranteed on a senior secured basis by certain of our subsidiaries and are secured by first-priority liens on two of Teekay's FPSO units, a pledge of the equity interests of Teekay's subsidiary that owns all of Teekay's common units of Teekay LNG Partners L.P. and all of Teekay’s Class A common shares of Teekay Tankers Ltd. and a pledge of the equity interests in Teekay's subsidiaries that own Teekay Parent's three FPSO units. The 2020 Notes rank equally in right of payment with all of Teekay's existing and future senior unsecured debt and senior to any future subordinated debt of Teekay. The 2020 Notes are not guaranteed by any of Teekay's subsidiaries and effectively rank behind all existing and future secured debt of Teekay and other liabilities of its subsidiaries. The Company may redeem the 2020 Notes in whole or in part at any time before their maturity date at a redemption price equal to the greater of (i) 100% of the principal amount of the 2020 Notes to be redeemed and (ii) the sum of the present values of the remaining scheduled payments of principal and interest on the 2020 Notes to be redeemed (excluding accrued interest), discounted to the redemption date on a semi-annual basis, at the treasury yield plus 50 basis points, plus accrued and unpaid interest to the redemption date. The Company may redeem the 2022 Notes in whole or in part at any time prior to November 15, 2020 at a redemption price equal to 100% of the principal amount of the 2022 Notes to be redeemed, plus the greater of (i) 1.0% of the principal amount of such 2022 Notes and (ii) the excess, if any, of the sum of the present values of the remaining scheduled payments of principal and interest on the 2022 Notes to be redeemed (excluding accrued interest), discounted to the redemption date on a semi-annual basis, at the treasury yield plus 50 basis points over the principal amount of such 2022 Notes, plus accrued and unpaid interest to, but excluding, the redemption date. The Company may redeem the 2022 Notes in whole or in part at a redemption price equal to a percentage of the principal amount of the 2022 Notes to be redeemed plus accrued and unpaid interest to, but excluding, the redemption date, as follows: 104.625% at any time on or after November 15, 2020, but prior to November 15, 2021; 102.313% at any time on or after November 15, 2021, but prior to August 15, 2022; and 100% at any time on or after August 15, 2022. On January 26, 2018, Teekay Parent completed a private offering of $125.0 million in aggregate principal amount of 5% Convertible Senior Notes due January 15, 2023 (the Convertible Notes ). The Convertible Notes are convertible into Teekay’s common stock, initially at a rate of 85.4701 shares of common stock per $1,000 principal amount of Convertible Notes. This represents an initial effective conversion price of $11.70 per share of common stock. The initial conversion price represents a premium of 20% to the concurrent common stock offering price of $9.75 per share. The conversion rate is subject to customary adjustments for, among other things, payments of dividends by Teekay Parent beyond the current quarterly dividend of $0.055 per share of common stock. On issuance of the Convertible Notes, $104.6 million of the net proceeds was reflected in long-term debt, including unamortized discount, and is being accreted to $125.0 million over its five -year term through interest expense. The remaining amount of the net proceeds of $16.1 million was allocated to the conversion feature and reflected in additional paid-in capital. Teekay LNG has a total of Norwegian Krone (or NOK ) 3.1 billion in senior unsecured bonds issued in the Norwegian bond market at June 30, 2019 that mature through August 2023. As of June 30, 2019 , the total carrying amount of the senior unsecured bonds was $357.5 million ( December 31, 2018 – $353.0 million ). The bonds are listed on the Oslo Stock Exchange. The interest payments on the bonds are based on NIBOR plus a margin, which ranges from 3.70% to 6.00% . The Company entered into cross currency rate swaps to swap all interest and principal payments of the bonds into U.S. Dollars, with the interest payments fixed at rates ranging from 5.92% to 7.89% , and the transfer of the principal amount fixed at $382.5 million upon maturity in exchange for NOK 3.1 billion (see Note 15 ). As of June 30, 2019 , the Company had 10 U.S. Dollar-denominated term loans outstanding, which totaled $1.4 billion in aggregate principal amount ( December 31, 2018 – $1.5 billion ). Interest payments on the term loans are based on LIBOR plus a margin , of which two of the term loans have additional tranches with a weighted average fixed rate of 4.49% . At June 30, 2019 , the margins ranged between 0.30% and 3.25% and at December 31, 2018 , the margins ranged between 0.30% and 3.50% . Term loans require payments in quarterly or semi-annual installments commencing three or six months after delivery of each newbuilding vessel financed thereby, and eight of the term loans have balloon or bullet repayments due at maturity. The term loans are collateralized by first-priority mortgages on 24 ( December 31, 2018 – 24 ) of the Company’s vessels, together with certain other security. Teekay LNG has two Euro-denominated term loans outstanding, which, as at June 30, 2019 , totaled 158.4 million Euros ( $180.1 million ) ( December 31, 2018 – 169.0 million Euros ( $193.8 million )). Teekay LNG is servicing the loans with funds generated by two Euro-denominated, long-term time-charter contracts. Interest payments on the loans are based on EURIBOR plus a margin. At June 30, 2019 and December 31, 2018 , the margins ranged between 0.60% and 1.95% . The Euro-denominated term loans reduce in monthly and semi-annual payments with varying maturities through 2024, are collateralized by first-priority mortgages on two of Teekay LNG's vessels, together with certain other security, and are guaranteed by Teekay LNG and one of its subsidiaries. Both Euro-denominated term loans and NOK-denominated bonds are revalued at the end of each period using the then-prevailing U.S. Dollar exchange rate. Due primarily to the revaluation of the Company’s NOK-denominated bonds, the Company’s Euro-denominated term loans and restricted cash, and the change in the valuation of the Company’s cross currency swaps, the Company recognized a foreign exchange loss of $5.9 million ( 2018 – gain of $12.5 million ) and a loss of $8.5 million ( 2018 – gain of $12.6 million ) during the three and six months ended June 30, 2019 and 2018 , respectively. The weighted-average interest rate on the Company’s aggregate long-term debt as at June 30, 2019 was 4.9% ( December 31, 2018 – 5.1% ). This rate does not include the effect of the Company’s interest rate swap agreements (see Note 15 ). Teekay has guaranteed obligations pursuant to certain credit facilities of Teekay Tankers. As at June 30, 2019 , the aggregate outstanding balance on such credit facilities was $155.8 million . The aggregate annual long-term debt principal repayments required to be made by the Company subsequent to June 30, 2019 are $120.1 million (remainder of 2019 ), $703.8 million ( 2020 ), $826.8 million ( 2021 ), $373.1 million ( 2022 ), $339.0 million ( 2023 ) and $528.4 million (thereafter). The Company’s long-term debt agreements generally provide for maintenance of minimum consolidated financial covenants and five loan agreements require the maintenance of vessel market value to loan ratios. As at June 30, 2019 , these ratios ranged from 135% to 511% compared to their minimum required ratios of 115% to 135% . The vessel values used in these ratios are the appraised values provided by third parties where available, or prepared by the Company based on second-hand sale and purchase market data. Changes in the LNG/LPG carrier and conventional tanker markets could negatively affect the Company's compliance with these ratios. Two of Teekay Tankers’ term loans, which are scheduled to mature between January 2021 and August 2021 are guaranteed by Teekay. One of the term loans contains covenants that require Teekay Parent to maintain the greater of (a) free cash (cash and cash equivalents) and undrawn committed revolving credit lines with at least six months to maturity of at least $50.0 million and (b) an aggregate of free cash and undrawn committed revolving credit lines with at least six months to maturity of at least 5.0% of Teekay’s total consolidated debt (excluding the debt Teekay LNG and its subsidiaries and Teekay Tankers and its subsidiaries which is non-recourse to Teekay). The other term loan requires Teekay Parent and Teekay Tankers collectively to maintain the greater of (a) free cash (cash and cash equivalents) of at least $100.0 million and (b) an aggregate of free cash and undrawn committed revolving credit lines with at least six months to maturity of at least 7.5% of Teekay's total consolidated debt (excluding the debt of Teekay LNG). In addition, certain loan agreements require Teekay Tankers to maintain minimum liquidity (cash, cash equivalents and undrawn committed revolving credit lines with at least six months to maturity) of $35.0 million and at least 5.0% of Teekay Tankers' total consolidated debt. Certain loan agreements require Teekay LNG to maintain a minimum level of tangible net worth, and minimum liquidity (cash, cash equivalents and undrawn committed revolving credit lines with at least six months to maturity) of $35.0 million , and not to exceed a maximum level of financial leverage. As at June 30, 2019 , the Company was in compliance with all covenants under its credit facilities and other long-term debt.

Capital Stock

Capital Stock	6 Months Ended
	Jun. 30, 2019
Share-based Payment Arrangement [Abstract]
Capital Stock	Capital Stock The authorized capital stock of Teekay at June 30, 2019 and December 31, 2018 was 25 million shares of preferred stock, with a par value of $1 per share, and 725 million shares of common stock, with a par value of $0.001 per share. As at June 30, 2019 , Teekay had no shares of preferred stock issued. In April 2019, Teekay filed a continuous offering program (or COP ) under which Teekay may issue shares of its common stock, at market prices up to a maximum aggregate amount of $63.0 million . No shares of common stock have been issued under this COP as of June 30, 2019 . During the six months ended June 30, 2018 , Teekay completed a public offering of 10.0 million common shares priced at $9.75 per share, raising net proceeds of approximately $93.0 million and issued 1.1 million shares of common stock as part of a COP initiated in 2016 generating net proceeds of $10.7 million . During the six months ended June 30, 2019 and 2018 , the Company granted 2,646,903 and 1,048,916 stock options with exercise prices of $3.98 and $8.67 per share, respectively, 796,733 and 625,878 restricted stock units with fair values of $3.3 million and $5.4 million , respectively, and 144,441 and 79,869 shares of restricted stock awards with fair values of $0.5 million and $0.7 million , respectively, to certain of the Company’s employees and directors. Each stock option has a ten -year term and vests equally over three years from the grant date. Each restricted stock unit and restricted stock award is equal in value to one share of the Company’s common stock plus reinvested dividends from the grant date to the vesting date. The restricted stock units vest equally over three years from the grant date. Upon vesting, the value of the restricted stock units and restricted stock awards are paid to each grantee in the form of shares. The weighted-average grant-date fair value of stock options granted during the six months ended June 30, 2019 was $1.47 per stock option. The fair value of each stock option granted was estimated on the grant date using the Black-Scholes option pricing model. The following weighted-average assumptions were used in computing the fair value of the stock options granted: expected volatility of 65.2% ; expected life of 5.5 years; dividend yield of 5.9% ; risk-free interest rate of 2.5% ; and estimated forfeiture rate of 6.0% . The expected life of the stock options granted was estimated using the historical exercise behavior of employees. The expected volatility was generally based on historical volatility as calculated using historical data during the five years prior to the grant date. Share-based Compensation of Subsidiaries During the six months ended June 30, 2019 and 2018 , 35,419 and 17,498 common units of Teekay LNG, respectively, and 159,375 and 168,029 shares of Class A common stock of Teekay Tankers, respectively, with aggregate values of $0.7 million and $0.5 million , respectively, were granted and issued to the non-management directors of the general partner of Teekay LNG and the non-management directors of Teekay Tankers as part of their annual compensation for 2019 and 2018 . Teekay LNG and Teekay Tankers grant equity-based compensation awards as incentive-based compensation to certain employees of Teekay’s subsidiaries that provide services to Teekay LNG and Teekay Tankers. During the six months ended June 30, 2019 and 2018 , Teekay LNG and Teekay Tankers granted restricted unit/stock-based compensation awards with respect to 80,100 and 62,283 common units of Teekay LNG and 633,134 and 762,640 Class A common shares of Teekay Tankers, respectively, with aggregate grant date fair values of $1.8 million and $2.1 million , respectively, based on Teekay LNG and Teekay Tankers’ closing unit or stock prices on the grant dates. Each restricted stock unit is equal in value to one of Teekay LNG’s or Teekay Tankers’ common units or common shares plus reinvested distributions or dividends from the grant date to the vesting date. The awards vest equally over three years from the grant date. Upon vesting, the awards are paid to a substantial majority of the grantees in the form of common units or common shares, net of withholding tax. During the six months ended June 30, 2019 , Teekay Tankers granted 1,380,173 and 470,765 stock options with an exercise price of $1.00 per share to officers and non-management directors of Teekay Tankers, respectively. During March 2018 , Teekay Tankers granted 736,327 and 504,097 stock options with an exercise price of $1.22 per share to officers and non-management directors of Teekay Tankers, respectively. Each stock option has a ten -year term and vests equally over three years from the grant date.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies a) Vessels Under Construction Teekay LNG's share of commitments to fund newbuilding and other construction contract costs as at June 30, 2019 are as follows: Total Remainder of 2020 2021 2022 Consolidated LNG carriers (i) 60,586 9,984 9,733 27,191 13,678 Equity-accounted joint ventures (ii) 349,681 349,681 — — — 410,267 359,665 9,733 27,191 13,678 (i) In May 2019, Teekay LNG received approximately $45 million from a shipyard related to warranty claims on certain of Teekay LNG's LNG carriers and recognized the amounts as reductions to the carrying values of the applicable LNG carriers. In connection with the warranty settlement, Teekay LNG entered into an agreement in June 2019 with a contractor to supply equipment on certain of its LNG carriers in 2021 and 2022 for an estimated cost of approximately $61 million . (ii) The commitment amounts relating to Teekay LNG’s share of costs for newbuilding and other construction contracts in Teekay LNG’s equity-accounted joint ventures are based on Teekay LNG’s ownership percentage in each respective joint venture as of June 30, 2019 . These commitments are described in more detail in "Item 18 – Financial Statements: Note 16" of the Company’s Annual Report on Form 20-F for the year ended December 31, 2018 . Based on Teekay LNG's ownership percentage in each respective joint venture, Teekay LNG's equity-accounted joint ventures have secured $301.0 million of undrawn financing related to Teekay LNG's proportionate share of the remaining commitments included in the table above. b) Liquidity Management is required to assess whether the Company will have sufficient liquidity to continue as a going concern for the one-year period following the issuance of its financial statements. The Company had a consolidated net loss of $95.6 million and consolidated cash flows from operating activities of $178.9 million during the six months ended June 30, 2019 , and had a working capital deficit of $365.9 million as at June 30, 2019 . This working capital deficit included approximately $540.4 million related to scheduled maturities and repayments of debt in the next 12 months, of which some loan maturities relate to assets which are subject to purchase obligations of the charterer, and was classified as current liabilities as at June 30, 2019. The Company's liquidity assessment was positively impacted in the second quarter of 2019 as a result of a number of completed transactions described below. In April 2019, Teekay Parent commenced a cash tender offer (or the Offer ) to purchase any and all of its outstanding 2020 Notes. Teekay Parent completed the Offer and purchased $460.9 million in aggregate principal amount of the 2020 Notes in May 2019. The purchase was funded by the net proceeds from Teekay Parent's concurrent bond offering of the 2022 Notes and the proceeds from the sale of Teekay Offshore as noted below, as well as its existing cash. The Company recognized a loss of $10.7 million on the purchase of the 2020 Notes in the second quarter of 2019. In May 2019, Teekay Parent sold to Brookfield all of its remaining interests in Teekay Offshore, which included the Company’s 49% general partner interest, common units, warrants, and an outstanding $25 million loan from the Company to Teekay Offshore, for total proceeds of $100 million in cash. The transaction was completed in May 2019. The Company recognized a loss on sale of $8.9 million upon completion of the transaction in the second quarter of 2019. In May 2019, Teekay Parent completed a private offering of $250.0 million in aggregate principal amount of the 2022 Notes. The 2022 Notes are guaranteed on a senior secured basis by certain of Teekay's subsidiaries and are secured by first-priority liens on two of Teekay Parent's FPSO units, a pledge of the equity interests of Teekay Parent's subsidiary that owns all of Teekay Parent's common units of Teekay LNG Partners L.P. and all of Teekay’s Class A common shares of Teekay Tankers Ltd. and a pledge of the equity interests in Teekay's subsidiaries that own Teekay Parent's three FPSO units. In connection with the Offer and issuance of the 2022 Notes, the Board of Directors approved the elimination of the quarterly dividend on Teekay Parent’s common stock commencing with the quarter ended March 31, 2019. In April 2019, Teekay Parent filed a COP under which Teekay Parent may issue shares of its common stock, at market prices up to a maximum aggregate amount of $63.0 million . No shares of common stock have been issued under this COP as of June 30, 2019 . Based on the Company’s liquidity at the date these consolidated financial statements were issued, and the liquidity the Company expects to generate from operations over the following year assuming no significant decline in spot tanker rates, the Company expects that it will have sufficient liquidity to continue as a going concern for at least the one-year period following the issuance of these consolidated financial statements. c) Legal Proceedings and Claims The Company may, from time to time, be involved in legal proceedings and claims that arise in the ordinary course of business. The Company believes that any adverse outcome of existing claims, individually or in the aggregate, would not have a material effect on its financial position, results of operations or cash flows, when taking into account its insurance coverage and indemnifications from charterers. d) Other The Company enters into indemnification agreements with certain officers and directors. In addition, the Company enters into other indemnification agreements in the ordinary course of business. The maximum potential amount of future payments required under these indemnification agreements is unlimited. However, the Company maintains what it believes is appropriate liability insurance that reduces its exposure and enables the Company to recover future amounts paid up to the maximum amount of the insurance coverage, less any deductible amounts pursuant to the terms of the respective policies, the amounts of which are not considered material.

Financial Instruments

Financial Instruments	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Financial Instruments	Financial Instruments a) Fair Value Measurements For a description of how the Company estimates fair value and for a description of the fair value hierarchy levels, see "Item 18 – Financial Statements: Note 11" in the Company’s Annual Report on Form 20-F for the year ended December 31, 2018 . 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 Company’s financial instruments that are not accounted for at fair value on a recurring basis. June 30, 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, cash equivalents and restricted cash ( note 18 ) Level 1 322,883 322,883 505,639 505,639 Derivative instruments (note 15) Interest rate swap agreements – assets (1) Level 2 1,896 1,896 9,640 9,640 Interest rate swap agreements – liabilities (1) Level 2 (56,663 ) (56,663 ) (43,175 ) (43,175 ) Cross currency interest swap agreements – liabilities (1) Level 2 (31,006 ) (31,006 ) (29,122 ) (29,122 ) Foreign currency contracts Level 2 (101 ) (101 ) — — Stock purchase warrants Level 3 — — 12,026 12,026 Freight forward agreements Level 2 61 61 (57 ) (57 ) Other Loans to equity-accounted investments (2) 93,924 (2 ) 169,197 (2 ) Loans to equity-accounted investments – Long-term (2) 62,196 (2 ) 62,207 (2 ) Short-term debt Level 2 (15,000 ) (15,000 ) — — Long-term debt – public (note 9) Level 1 (627,981 ) (658,046 ) (856,986 ) (851,470 ) Long-term debt – non-public (note 9) Level 2 (2,215,344 ) (2,168,252 ) (2,462,537 ) (2,395,300 ) Obligations related to finance leases, including current portion ( note 6 ) Level 2 (1,826,732 ) (1,872,238 ) (1,673,845 ) (1,652,345 ) (1) The fair value of the Company's interest rate swap and cross currency swap agreements at June 30, 2019 includes $2.6 million ( December 31, 2018 - $3.2 million ) accrued interest expense which is recorded in accrued liabilities on the unaudited consolidated balance sheets. (2) In the unaudited interim consolidated financial statements, the Company’s loans to and investments in equity-accounted investments form the aggregate carrying value of the Company’s interests in entities accounted for by the equity method. The fair value of the individual components of such aggregate interests is not determinable. Stock purchase warrants - Prior to the 2019 Brookfield Transaction on May 8, 2019, Teekay held 15.5 million common unit warrants issued by Teekay Offshore to Teekay in connection with the 2017 Brookfield Transaction (or Brookfield Transaction Warrants ) and 1,755,000 warrants to purchase common units of Teekay Offshore issued to Teekay in connection with Teekay Offshore's private placement of Series D Preferred Units in June 2016 (or the Series D Warrants ) (see "Item 18 – Financial Statements: Note 4" of the Company’s Annual Report on Form 20-F for the year ended December 31, 2018 ). In May 2019, Teekay sold to Brookfield all of the Company’s remaining interests in Teekay Offshore, which included, among other things, both the Brookfield Transaction Warrants and Series D Warrants (see Note 4 ). Changes in fair value during the three and six months ended June 30, 2019 and 2018 for the Company’s Brookfield Transaction Warrants and the Series D Warrants, which were measured at fair value using significant unobservable inputs (Level 3), are as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Fair value at the beginning of the period 14,342 29,065 12,026 30,749 Unrealized gain included in earnings 24,584 6,206 26,900 4,522 Realized (loss) gain included in earnings (25,559 ) — (25,559 ) — Settlements (13,367 ) — (13,367 ) — Fair value at the end of the period — 35,271 — 35,271 b) Financing Receivables The following table contains a summary of the Company’s carrying value of financing receivables by type of borrower and the method by which the Company monitors the credit quality of its financing receivables on a quarterly basis. Class of Financing Receivable Credit Quality Indicator Grade June 30, 2019 December 31, 2018 $ $ Direct financing leases Payment activity Performing 564,685 575,163 Other loan receivables Loans to equity-accounted investments and joint venture partners Other internal metrics Performing 156,120 231,404 Long-term receivable and accrued revenue included in accounts receivable and other assets Payment activity Performing 6,857 15,694 727,662 822,261

Restructuring Reversals (Charge

Restructuring Reversals (Charges)	6 Months Ended
	Jun. 30, 2019
Restructuring and Related Activities [Abstract]
Restructuring Charges	Restructuring Charges During the three and six months ended June 30, 2019 , the Company recorded restructuring charges of $1.4 million and $10.0 million , respectively. The restructuring charges primarily related to severance costs resulting from the termination of certain management contracts in Teekay Parent of which the costs were fully recovered from the customer and the recovery is presented in revenue, as well as from the termination of the charter contract for the Toledo Spirit Suezmax tanker in Teekay LNG upon sale of the vessel. During the three and six months ended June 30, 2018 , the Company recorded restructuring charges of $1.1 million and $3.3 million , respectively. The restructuring charges primarily related to severance costs resulting from reorganization and realignment of resources of certain of the Company's business development, marine solutions and fleet operations functions to better respond to the changing business environment. At June 30, 2019 and December 31, 2018 , $1.3 million and $0.8 million , respectively, of restructuring liabilities were recorded in accounts payable, accrued liabilities and other on the consolidated balance sheets.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Loss As at June 30, 2019 and December 31, 2018 , the Company’s accumulated other comprehensive loss (or AOCI ) consisted of the following components: June 30, December 31, 2019 2018 $ $ Unrealized (loss) gain on qualifying cash flow hedging instruments (17,801 ) 903 Pension adjustments, net of tax recoveries (3,342 ) (3,176 ) (21,143 ) (2,273 )

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	6 Months Ended
	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities The Company uses derivative instruments to manage certain risks in accordance with its overall risk management policies. Foreign Exchange Risk From time to time the Company economically hedges portions of its forecasted expenditures denominated in foreign currencies with foreign currency forward contracts. As at June 30, 2019 , the Company was committed to the following foreign currency forward contracts: Contract Amount in Foreign Currency Average Forward Rate (1) Fair Value / Carrying Amount Of Asset (Liability) $ Expected Maturity 2019 2020 $ $ Euro 9,240 0.86 (101) 3,952 6,750 (1) Average contractual exchange rate represents the contracted amount of foreign currency one U.S. Dollar will buy. The Company enters into cross currency swaps, and pursuant to these swaps the Company receives the principal amount in NOK on the maturity date of the swap, in exchange for payment of a fixed U.S. Dollar amount. In addition, the cross currency swaps exchange a receipt of floating interest in NOK based on NIBOR plus a margin for a payment of U.S. Dollar fixed interest. The purpose of the cross currency swaps is to economically hedge the foreign currency exposure on the payment of interest and principal amounts of the Company’s NOK-denominated bonds due in 2020, 2021 and 2023. In addition, the cross currency swaps economically hedge the interest rate exposure on the NOK bonds due in 2020, 2021 and 2023. The Company has not designated, for accounting purposes, these cross currency swaps as cash flow hedges of its NOK-denominated bonds due in 2020, 2021 and 2023. As at June 30, 2019 , the Company was committed to the following cross currency swaps: Fair Value / Notional Notional Floating Rate Receivable Reference Margin Fixed Rate Remaining 1,000,000 134,000 NIBOR 3.70% 5.92% (17,133 ) 0.9 1,200,000 146,500 NIBOR 6.00% 7.72% (5,785 ) 2.3 850,000 102,000 NIBOR 4.60% 7.89% (8,088 ) 4.2 (31,006 ) Interest Rate Risk The Company enters into interest rate swap agreements, which exchange a receipt of floating interest for a payment of fixed interest, to reduce the Company’s exposure to interest rate variability on its outstanding floating-rate debt. The Company designates certain of its interest rate swap agreements as cash flow hedges for accounting purposes. As at June 30, 2019 , the Company was committed to the following interest rate swap agreements related to its LIBOR -based debt and EURIBOR -based debt, whereby certain of the Company’s floating-rate debt were swapped with fixed-rate obligations: Interest Rate Index Principal Amount Fair Value / Carrying Amount of Asset / (Liability) $ Weighted- Fixed Interest Rate (%) (1) LIBOR-Based Debt: U.S. Dollar-denominated interest rate swaps (2) LIBOR 1,011,178 (44,855 ) 3.6 3.0 EURIBOR-Based Debt: Euro-denominated interest rate swaps EURIBOR 81,059 (9,912 ) 4.2 3.8 (54,767 ) (1) Excludes the margins the Company pays on its variable-rate debt, which, as of June 30, 2019 , ranged from 0.3% to 3.95% . (2) Includes interest rate swaps with the notional amount reducing quarterly or semi-annually. Two interest rate swaps are subject to mandatory early termination in 2020 and 2021, at which time the swaps will be settled based on their fair value. Stock Purchase Warrants Prior to the 2019 Brookfield Transaction on May 8, 2019, Teekay held 15.5 million Brookfield Transaction Warrants and 1,755,000 Series D Warrants of Teekay Offshore (see Note 12 ). As part of the 2019 Brookfield Transaction, Teekay sold to Brookfield all of the Company’s remaining interests in Teekay Offshore, which included, among other things, both the Brookfield Transaction Warrants and Series D Warrants. Tabular Disclosure The following tables present the location and fair value amounts of derivative instruments, segregated by type of contract, on the Company’s unaudited consolidated balance sheets. Prepaid Expenses and Other Other Non-Current Assets Accounts Payable, Accrued Current Derivative $ $ $ $ $ As at June 30, 2019 Derivatives designated as a cash flow hedge: Interest rate swap agreements — — 3 (497 ) (3,758 ) Derivatives not designated as a cash flow hedge: Foreign currency contracts — — — (101 ) — Interest rate swap agreements 1,168 240 (2,094 ) (8,996 ) (40,833 ) Cross currency swap agreements — — (538 ) (18,887 ) (11,581 ) Forward freight agreements 61 — — — 1,229 240 (2,629 ) (28,481 ) (56,172 ) Prepaid Expenses and Other Other Non-Current Assets Accounts Payable, Accrued Current Derivative $ $ $ $ $ As at December 31, 2018 Derivatives designated as a cash flow hedge: Interest rate swap agreements 784 2,362 20 — — Derivatives not designated as a cash flow hedge: Interest rate swap agreements 2,915 2,973 (2,498 ) (7,419 ) (32,672 ) Cross currency swap agreements — — (713 ) (4,729 ) (23,680 ) Stock purchase warrants — 12,026 — — — Forward freight agreements — — — (57 ) — 3,699 17,361 (3,191 ) (12,205 ) (56,352 ) As at June 30, 2019 , the Company had multiple interest rate swaps and cross currency swaps with the same counterparty that are subject to the same master agreements. Each of these 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 Company’s unaudited consolidated balance sheets. As at June 30, 2019 , these derivatives had an aggregate fair value asset amount of $1.9 million and an aggregate fair value liability amount of $66.2 million . For the periods indicated, the following tables present the gains (losses) on interest rate swap agreements designated and qualifying as cash flow hedges (excluding such agreements in equity-accounted investments): Three Months Ended June 30, 2019 Amount Amount Recognized in AOCI (1) Reclassified from AOCI (2) (4,570) 157 Interest expense Three Months Ended June 30, 2018 Effective Portion Effective Portion Ineffective Recognized in AOCI (1) Reclassified from AOCI (2) Portion (3) 1,534 2 — Interest expense Six Months Ended June 30, 2019 Effective Portion Amount Recognized in AOCI (1) Reclassified from AOCI (2) (7,402) 408 Interest expense Six Months Ended June 30, 2018 Effective Portion Effective Portion Ineffective Recognized in AOCI (1) Reclassified from AOCI (2) Portion (3) 5,090 (248) 740 Interest expense (1) Recognized in accumulated other comprehensive loss (or AOCI ). (2) Recorded in AOCI during the term of the hedging relationship and reclassified to earnings. (3) Recognized in the ineffective portion of gains (losses) on derivative instruments designated and qualifying as cash flow hedges. Realized and unrealized (losses) and gains from derivative instruments that are not designated for accounting purposes as cash flow hedges are recognized in earnings and reported in realized and unrealized gains (losses) on non-designated derivatives in the unaudited consolidated statements of loss as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Realized losses relating to: Interest rate swap agreements (1,785 ) (4,031 ) (3,473 ) (8,840 ) Stock purchase warrants (25,559 ) — (25,559 ) — Forward freight agreements (29 ) (18 ) (42 ) (18 ) (27,373 ) (4,049 ) (29,074 ) (8,858 ) Unrealized gains (losses) relating to: Interest rate swap agreements (8,195 ) 8,532 (14,216 ) 24,451 Foreign currency forward contracts (101 ) — (101 ) — Stock purchase warrants 24,584 6,206 26,900 4,522 Forward freight agreements 121 34 104 34 16,409 14,772 12,687 29,007 Total realized and unrealized (losses) gains on derivative instruments (10,964 ) 10,723 (16,387 ) 20,149 Realized and unrealized gains and losses from cross currency swaps are recognized in earnings and reported in foreign exchange (loss) gain in the consolidated statements of loss as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Realized losses (1,087 ) (1,798 ) (2,521 ) (3,182 ) Unrealized (losses) gains (140 ) (16,566 ) (2,060 ) 5,768 Total realized and unrealized (losses) gains on cross currency swaps (1,227 ) (18,364 ) (4,581 ) 2,586 The Company is exposed to credit loss to the extent the fair value represents an asset in the event of non-performance by the counterparties to the foreign currency forward contracts, and cross currency and interest rate swap agreements; however, the Company does not anticipate non-performance by any of the counterparties. In order to minimize counterparty risk, the Company only enters into derivative transactions with counterparties that are rated A- or better by Standard & Poor’s or A3 or better by Moody’s at the time of the transaction. In addition, to the extent possible and practical, interest rate swaps are entered into with different counterparties to reduce concentration risk.

Income Tax Expense (Recovery)

Income Tax Expense (Recovery)	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Tax Expense	Income Tax Expense The components of the provision for income tax expense are as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Current (3,219 ) (8,410 ) (8,072 ) (11,221 ) Deferred (185 ) (336 ) (368 ) (1,642 ) Income tax expense (3,404 ) (8,746 ) (8,440 ) (12,863 ) The following table reflects changes in uncertain tax positions relating to freight tax liabilities, which are recorded in other long-term liabilities on the Company's consolidated balance sheets: Six Months Ended June 30, 2019 2018 $ $ Balance of unrecognized tax benefits as at January 1 40,556 31,061 Increases for positions related to the current year 2,106 2,047 Changes for positions taken in prior periods 4,121 2,337 Decrease related to statute limitations — (312 ) Balance of unrecognized tax benefits as at June 30 46,783 35,133 The Company does not presently anticipate its uncertain tax positions will significantly increase in the next 12 months; however, this is dependent on the jurisdictions of the trading activity of its vessels. The Company reviews its freight tax obligations on a regular basis and may update its assessment of its tax positions based on available information at that time. Such information may include legal advice as to applicability of freight taxes in relevant jurisdictions. Freight tax regulations are subject to change and interpretation; therefore, the amounts recorded by the Company may change accordingly.

Net Loss Per Share

Net Loss Per Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Net loss attributable to the shareholders of Teekay Corporation – basic and diluted (39,485 ) (28,324 ) (123,742 ) (48,879 ) Weighted average number of common shares 100,783,496 100,434,512 100,652,685 98,892,574 Common stock and common stock equivalents 100,783,496 100,434,512 100,652,685 98,892,574 Loss per common share – basic and diluted (0.39 ) (0.28 ) (1.23 ) (0.49 ) The Company intends to settle the principal of the Convertible Notes in cash on conversion and calculates diluted earnings per share using the treasury-stock method. Stock-based awards and the conversion feature on the Convertible Notes that have an anti-dilutive effect on the calculation of diluted loss per common share, are excluded from this calculation. For the three and six months ended June 30, 2019 , options to acquire 6.1 million shares of Teekay Common Stock had an anti-dilutive effect on the calculation of diluted income per common share ( three and six months ended June 30, 2018 – 3.9 million ). In periods where a loss attributable to shareholders of Teekay has been incurred, all stock-based awards and the conversion feature on the Convertible Notes are anti-dilutive.

Supplementary Cash Flow Informa

Supplementary Cash Flow Information	6 Months Ended
	Jun. 30, 2019
Supplemental Cash Flow Elements [Abstract]
Supplementary Cash Flow Information	Supplemental Cash Flow Information Total cash, cash equivalents and restricted cash are as follows: June 30, 2019 December 31, 2018 June 30, 2018 December 31, 2017 $ $ $ $ Cash and cash equivalents 235,199 424,169 454,933 445,452 Restricted cash – current 50,798 40,493 55,466 38,179 Restricted cash – non-current 36,886 40,977 34,627 68,543 322,883 505,639 545,026 552,174 The Company maintains restricted cash deposits relating to certain term loans, collateral for cross currency swaps (see Note 15 ), leasing arrangements, project tenders and amounts received from charterers to be used only for dry-docking expenditures and emergency repairs. The non-cash item related to operating lease right-of-use assets and operating lease liabilities for the six months ended June 30, 2019 was $211.6 million . The associated sales of the Toledo Spirit and Teide Spirit by its owner during the six months ended June 30, 2019 and 2018, respectively, resulted in the vessels being returned to their owner with the obligations related to finance lease being concurrently extinguished. As a result, the sales of the vessels and the concurrent extinguishment of the corresponding obligations related to finance lease of $23.6 million and $23.1 million for the six months ended June 30, 2019 and 2018, respectively, were treated as non-cash transactions in the Company's consolidated statements of cash flows.

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The unaudited interim consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (or GAAP ). They include the accounts of Teekay Corporation (or Teekay ), which is incorporated under the laws of the Republic of the Marshall Islands, its wholly-owned or controlled subsidiaries and any variable interest entities (or VIEs ) of which it is the primary beneficiary (collectively, the Company ). Certain of Teekay’s significant non-wholly owned subsidiaries are consolidated in these financial statements even though Teekay owns less than a 50% ownership interest in the subsidiaries. These significant subsidiaries include the publicly-traded subsidiaries Teekay LNG Partners L.P. (or Teekay LNG ) and Teekay Tankers Ltd. (or Teekay Tankers ). Certain information and footnote disclosures required by GAAP for complete annual financial statements have been omitted from these unaudited interim consolidated financial statements and, therefore, these financial statements should be read in conjunction with the Company’s audited consolidated financial statements for the year ended December 31, 2018 , included in the Company’s Annual Report on Form 20-F, filed with the U.S. Securities and Exchange Commission (or SEC ) on April 1, 2019. In the opinion of management, these unaudited interim consolidated financial statements reflect all adjustments, consisting of a normal recurring nature, necessary to present fairly, in all material respects, the Company’s consolidated financial position, results of operations, cash flows and changes in total equity for the interim periods presented. The results of operations for the three and six months ended June 30, 2019 , are not necessarily indicative of those for a full fiscal year. Significant intercompany balances and transactions have been eliminated upon consolidation. The preparation of 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 could differ from those estimates. It is possible that the amounts recorded as derivative assets and liabilities could vary by material amounts prior to their settlement.

Accounting Pronouncements Accou

Accounting Pronouncements Accounting Pronouncements (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements, Policy	Recent Accounting Pronouncements In February 2016, the Financial Accounting Standards Board (or 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 became effective for the Company on January 1, 2019. FASB issued an additional accounting standards update in July 2018 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 and providing an optional practical expedient to lessors not to separate lease and non-lease components of a contract if certain criteria are met. In addition, the Company early adopted ASU 2019-01, which provides an exception for lessors who are not manufacturers or dealers to determine the fair value of leased property using the underlying asset's cost, instead of fair value. The Company has elected to use this new optional transitional approach. To determine the cumulative effect adjustment, the Company has not reassessed lease classification, initial direct costs for any existing leases, or whether any expired or existing contracts are or contain leases. The Company identified the following differences: • The adoption of ASU 2016-02 results in a change in the accounting method for the lease portion of the daily charter hire for the chartered-in vessels by the Company and the Company's equity-accounted joint ventures accounted for as operating leases with firm periods of greater than one year, as well as a small number of office leases. On January 1, 2019, a right-of-use asset of $170.0 million and a lease liability of $170.0 million were recognized, equal to the present value of future minimum lease payments. On June 30, 2019 , the right-of-use asset relating to vessels was $173.5 million and the lease liability was $173.5 million . The carrying value of the Company's chartered-in vessels has also been reclassified from other non-current assets ( $12.2 million – June 30, 2019 and $13.7 million – January 1, 2019) and from other long-term liabilities ($ nil – June 30, 2019 and $0.9 million – January 1, 2019) to the right-of-use asset. In addition, on June 30, 2019 the right-of-use asset relating to office leases was $8.5 million and is presented in other non-current assets. The lease liability relating to office leases, presented in accounts payable, accrued liabilities and other and other long-term liabilities, was $8.7 million , and $0.2 million was reflected as a foreign exchange loss during the six months ended June 30, 2019 . Under ASU 2016-02, the Company and the Company's equity-accounted joint ventures recognize 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. This resulted in an increase in the Company's and its equity-accounted joint ventures' assets and liabilities. The pattern of expense recognition of chartered-in vessels is expected to remain substantially unchanged from the prior policy, unless the right-of-use asset becomes impaired. • The adoption of ASU 2016-02 results in the recognition of revenue from the reimbursement of scheduled dry-dock expenditures, where such charter contract is accounted for as an operating lease, occurring upon completion of the scheduled dry-dock, instead of ratably over the period between the previous scheduled dry-dock and the next scheduled dry-dock. This change decreased investment in and loans to equity-accounted investments by $3.0 million , and total equity by $3.0 million as at June 30, 2019 . The cumulative decrease to opening equity as at January 1, 2019 was $3.0 million . • The adoption of ASU 2016-02 results in direct financing lease payments received being presented as an operating cash inflow instead of an investing cash inflow in the consolidated statement of cash flows. Direct financing lease payments received during the three and six months ended June 30, 2019 were $3.0 million and $6.1 million , respectively ( three and six months ended June 30, 2018 – $2.8 million and $5.2 million , respectively). • The adoption of ASU 2016-02 results in sale and leaseback transactions where the seller lessee has a fixed price repurchase option or other situations where the leaseback would be classified as a finance lease being accounted for as a failed sale of the vessel and a failed purchase of the vessel by the buyer lessor. Prior to the adoption of ASU 2016-02 such transactions were accounted for as a completed sale and a completed purchase. Consequently, for such transactions, the Company does not derecognize the vessel sold and continues to depreciate the vessel as if it was the legal owner. Proceeds received from the sale of the vessel are recognized as an obligation related to finance lease, and bareboat charter hire payments made by the Company to the lessor are allocated between interest expense and principal repayments on the obligation related to finance lease . The adoption of ASU 2016-02 has resulted in the sale and leaseback of the Yamal Spirit , the Cascade Spirit and the Aspen Spirit during the first half of 2019 being accounted for as failed sales and unlike the 22 sale-leaseback transactions entered in prior years, the Company is not considered as holding a variable interest in the buyer lessor entity and thus, does not consolidate the buyer lessor entity (see Note 6 ). The Company's floating production, storage and offloading (or FPSO ) contracts, time charters and voyage charters include both a lease component, consisting of the lease of the vessel, and a non-lease component, consisting of the operation of the vessel for the customer. The Company has elected not to separate the non-lease component from the lease component for all such charters, where the lease component is classified as an operating lease and certain other required criteria are met, and to account for the combined component as an operating lease in accordance with Accounting Standards Codification (or ASC ) 842 Leases . In August 2017, the FASB issued Accounting Standards Update 2017-12, Derivatives and Hedging - Targeted Improvements to Accounting for Hedging Activities (or ASU 2017-12 ). ASU 2017-12 eliminates the requirement to separately measure and report hedge ineffectiveness and generally requires, for qualifying hedges, the entire change in the fair value of a hedging instrument to be presented in the same income statement line as the hedged item. The guidance also modifies the accounting for components excluded from the assessment of hedge effectiveness, eases documentation and assessment requirements and modifies certain disclosure requirements. ASU 2017-12 became effective for the Company on January 1, 2019. This change decreased accumulated other comprehensive (loss) income by $4.8 million as at January 1, 2019, and correspondingly increased opening equity as at January 1, 2019 by $4.8 million . 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 is effective for the Company on January 1, 2020, with a modified-retrospective approach. The Company is currently evaluating the effect of adopting this new guidance.

Revenue (Tables)

Revenue (Tables)	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Direct Financing Lease, Lease Income [Table Text Block]	The following table lists the components of Teekay LNG's net investments in direct financing leases: June 30, 2019 December 31, 2018 $ $ Total minimum lease payments to be received 865,333 897,130 Estimated unguaranteed residual value of leased properties 291,098 291,098 Initial direct costs and other 312 329 Less unearned revenue (592,058 ) (613,394 ) Total 564,685 575,163 Less current portion (13,082 ) (12,635 ) Long-term portion 551,603 562,528
Disaggregation of Revenue	The following tables contain the Company’s revenue for the three and six months ended June 30, 2019 and 2018 , by contract type, by segment and by business lines within segments. Three Months Ended June 30, 2019 Teekay LNG Liquefied Gas Carriers Teekay LNG Conventional Tankers Teekay Tankers Conventional Tankers Teekay Parent Offshore Production Teekay Parent Other Eliminations and Other Total $ $ $ $ $ $ $ Time charters 133,684 2,369 1,456 — 8,078 (2,487 ) 143,100 Voyage charters 8,858 — 186,805 — — — 195,663 Bareboat charters 6,129 — — — — — 6,129 FPSO contracts — — — 57,828 — — 57,828 Management fees and other 2,020 — 14,016 — 39,911 (1,000 ) 54,947 150,691 2,369 202,277 57,828 47,989 (3,487 ) 457,667 Three Months Ended June 30, 2018 Teekay LNG Liquefied Gas Carriers Teekay LNG Conventional Tankers Teekay Tankers Conventional Tankers Teekay Parent Offshore Production Teekay Parent Other Eliminations and Other Total $ $ $ $ $ $ $ Time charters 96,857 4,316 17,384 — 7,588 (1,439 ) 124,706 Voyage charters 6,767 5,719 144,328 — — — 156,814 Bareboat charters 5,734 — — — — — 5,734 FPSO contracts — — — 66,429 — — 66,429 Management fees and other 2,814 108 9,947 — 38,595 495 51,959 112,172 10,143 171,659 66,429 46,183 (944 ) 405,642 Six Months Ended June 30, 2019 Teekay LNG Liquefied Gas Carriers Teekay LNG Conventional Tankers Teekay Tankers Conventional Tankers Teekay Parent Offshore Production Teekay Parent Other Eliminations and Other Total $ $ $ $ $ $ $ Time charters 264,459 5,131 4,866 — 14,347 (2,487 ) 286,316 Voyage charters 18,018 — 403,222 — — — 421,240 Bareboat charters 12,191 — — — — — 12,191 FPSO contracts — — — 107,266 — — 107,266 Management fees and other 3,005 — 26,690 — 84,301 (2,129 ) 111,867 297,673 5,131 434,778 107,266 98,648 (4,616 ) 938,880 Six Months Ended June 30, 2018 Teekay LNG Liquefied Gas Carriers Teekay LNG Conventional Tankers Teekay Tankers Conventional Tankers Teekay Parent Offshore Production Teekay Parent Other Eliminations and Other Total $ $ $ $ $ $ $ Time charters 190,316 9,714 39,494 — 20,682 (9,418 ) 250,788 Voyage charters 10,390 10,470 279,970 — — — 300,830 Bareboat charters 11,111 — — — — — 11,111 FPSO contracts — — — 132,399 — — 132,399 Management fees and other 5,404 216 20,660 — 77,445 811 104,536 217,221 20,400 340,124 132,399 98,127 (8,607 ) 799,664 The following tables contain the Company’s revenue for the three and six months ended June 30, 2019 and 2018 , by contract type, by segment and by business lines within segments. Three Months Ended June 30, 2019 Teekay LNG Liquefied Gas Carriers Teekay LNG Conventional Tankers Teekay Tankers Conventional Tankers Teekay Parent Offshore Production Teekay Parent Other Eliminations and Other Total $ $ $ $ $ $ $ Time charters 133,684 2,369 1,456 — 8,078 (2,487 ) 143,100 Voyage charters 8,858 — 186,805 — — — 195,663 Bareboat charters 6,129 — — — — — 6,129 FPSO contracts — — — 57,828 — — 57,828 Management fees and other 2,020 — 14,016 — 39,911 (1,000 ) 54,947 150,691 2,369 202,277 57,828 47,989 (3,487 ) 457,667 Three Months Ended June 30, 2018 Teekay LNG Liquefied Gas Carriers Teekay LNG Conventional Tankers Teekay Tankers Conventional Tankers Teekay Parent Offshore Production Teekay Parent Other Eliminations and Other Total $ $ $ $ $ $ $ Time charters 96,857 4,316 17,384 — 7,588 (1,439 ) 124,706 Voyage charters 6,767 5,719 144,328 — — — 156,814 Bareboat charters 5,734 — — — — — 5,734 FPSO contracts — — — 66,429 — — 66,429 Management fees and other 2,814 108 9,947 — 38,595 495 51,959 112,172 10,143 171,659 66,429 46,183 (944 ) 405,642 Six Months Ended June 30, 2019 Teekay LNG Liquefied Gas Carriers Teekay LNG Conventional Tankers Teekay Tankers Conventional Tankers Teekay Parent Offshore Production Teekay Parent Other Eliminations and Other Total $ $ $ $ $ $ $ Time charters 264,459 5,131 4,866 — 14,347 (2,487 ) 286,316 Voyage charters 18,018 — 403,222 — — — 421,240 Bareboat charters 12,191 — — — — — 12,191 FPSO contracts — — — 107,266 — — 107,266 Management fees and other 3,005 — 26,690 — 84,301 (2,129 ) 111,867 297,673 5,131 434,778 107,266 98,648 (4,616 ) 938,880 Six Months Ended June 30, 2018 Teekay LNG Liquefied Gas Carriers Teekay LNG Conventional Tankers Teekay Tankers Conventional Tankers Teekay Parent Offshore Production Teekay Parent Other Eliminations and Other Total $ $ $ $ $ $ $ Time charters 190,316 9,714 39,494 — 20,682 (9,418 ) 250,788 Voyage charters 10,390 10,470 279,970 — — — 300,830 Bareboat charters 11,111 — — — — — 11,111 FPSO contracts — — — 132,399 — — 132,399 Management fees and other 5,404 216 20,660 — 77,445 811 104,536 217,221 20,400 340,124 132,399 98,127 (8,607 ) 799,664 The following table contains the Company's total revenue for the three and six months ended June 30, 2019 and 2018 , by contracts or components of contracts accounted for as leases and those not accounted for as leases. Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Lease revenue Lease revenue from lease payments of operating leases 354,410 302,010 737,553 596,565 Interest income on lease receivables 12,969 9,954 25,763 19,914 Variable lease payments – cost reimbursements (1) 13,307 10,169 25,314 18,677 Variable lease payments – other (2) 16,320 27,426 27,144 51,708 397,006 349,559 815,774 686,864 Non-lease revenue Non-lease revenue – related to sales-type or direct financing leases 5,714 4,124 11,239 8,264 Management fees and other income 54,947 51,959 111,867 104,536 60,661 56,083 123,106 112,800 Total 457,667 405,642 938,880 799,664 (1) Reimbursement for vessel operating expenditures and dry-docking expenditures received from the Company's customers relating to such costs incurred by the Company to operate the vessel for the customer. (2) Compensation from time-charter contracts based on spot market rates in excess of a base daily hire amount, 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.

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Disaggregation of Revenue	The following table includes the Company’s revenues by segment for the three and six months ended June 30, 2019 and 2018 : Revenues Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Teekay LNG Liquefied Gas Carriers (1) 150,691 112,172 297,673 217,221 Conventional Tankers 2,369 10,143 5,131 20,400 153,060 122,315 302,804 237,621 Teekay Tankers Conventional Tankers (1) 202,277 171,659 434,778 340,124 Teekay Parent Offshore Production 57,828 66,429 107,266 132,399 Other 47,989 46,183 98,648 98,127 105,817 112,612 205,914 230,526 Eliminations and other (3,487 ) (944 ) (4,616 ) (8,607 ) 457,667 405,642 938,880 799,664 (1) The amounts in the table below represent revenue earned by each segment from other segments within the group. During 2019, Teekay Tankers' ship-to-ship transfer business provided operational and maintenance services to Teekay LNG Bahrain Operations L.L.C., an entity wholly-owned by Teekay LNG, for the LNG receiving and regasification terminal in Bahrain. Also during 2019, the Magellan Spirit was chartered by Teekay LNG to Teekay Parent. During 2018, certain vessels were chartered by Teekay LNG to Teekay Parent. Such intersegment revenue for the three and six months ended June 30, 2019 and 2018 is as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Teekay LNG - Liquefied Gas Carriers 2,487 1,439 2,487 9,418 Teekay Tankers - Conventional Tankers 1,000 — 2,129 — 3,487 1,439 4,616 9,418
Income (loss) from Vessel Operations by Segment	The following table includes the Company’s income (loss) from vessel operations by segment for the three and six months ended June 30, 2019 and 2018 : Income (Loss) from Vessel Operations (1) Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Teekay LNG Liquefied Gas Carriers 74,244 9,445 144,687 53,990 Conventional Tankers 433 1,060 (649 ) (18,343 ) 74,677 10,505 144,038 35,647 Teekay Tankers Conventional Tankers 5,051 (13,415 ) 37,148 (21,836 ) Teekay Parent Offshore Production (5,987 ) 5,541 (18,544 ) 12,423 Other (2,278 ) (710 ) (6,947 ) (5,808 ) (8,265 ) 4,831 (25,491 ) 6,615 71,463 1,921 155,695 20,426 (1) Includes direct general and administrative expenses and indirect general and administrative expenses (allocated to each segment based on estimated use of corporate resources).
Reconciliation of Total Segment Assets	A reconciliation of total segment assets to total assets presented in the accompanying unaudited consolidated balance sheets is as follows: June 30, 2019 December 31, 2018 $ $ Teekay LNG – Liquefied Gas Carriers 5,207,739 5,188,088 Teekay LNG – Conventional Tankers 13,748 39,450 Teekay Tankers – Conventional Tankers 2,118,499 2,106,169 Teekay Parent – Offshore Production 361,785 311,550 Teekay Parent – Conventional Tankers — 13,056 Teekay Parent – Other 91,683 25,224 Teekay Offshore — 233,225 Cash and cash equivalents 235,199 424,169 Other assets not allocated 130,348 70,153 Eliminations (32,983 ) (19,414 ) Consolidated total assets 8,126,018 8,391,670

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Lessee, Lease, Description [Line Items]
Lease, Cost [Table Text Block]	Obligations Related to Finance Leases June 30, 2019 December 31, 2018 $ $ Teekay LNG LNG Carriers 1,399,796 1,274,569 Suezmax Tanker — 23,987 Teekay Tankers Suezmax Tankers 222,859 165,145 Aframax Tankers 178,518 184,021 LR2 Product Tanker 25,559 26,123 Total obligations related to finance leases 1,826,732 1,673,845 Less current portion (89,922 ) (102,115 ) Long-term obligations related to finance leases 1,736,810 1,571,730
Finance Lease, Liability, Maturity [Table Text Block]	As at June 30, 2019 and December 31, 2018 , the total remaining commitments related to the financial liabilities of Teekay Tankers' Suezmax, Aframax and LR2 product tankers, including the amounts to be paid for the related purchase obligations, approximated $632.0 million ( December 31, 2018 – $557.1 million ), including imputed interest of $203.2 million ( December 31, 2018 – $181.8 million ), repayable from 2019 through 2030, as indicated below: Commitments At June 30, 2019 At December 31, 2018 Year $ $ Remainder of 2019 30,336 47,962 2020 56,364 47,373 2021 56,202 47,237 2022 56,193 47,230 2023 56,184 47,222 Thereafter 376,750 320,064
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	A maturity analysis of the Company’s operating lease liabilities from time-charter-in and bareboat charter contracts (excluding short-term leases) at June 30, 2019 is as follows: Lease Commitment Non-Lease Commitment Total Commitment Year $ $ $ Payments Remainder of 2019 36,398 17,112 53,510 2020 65,362 33,659 99,021 2021 51,672 24,913 76,585 2022 22,978 8,189 31,167 2023 9,227 — 9,227 Thereafter 5,712 — 5,712 Total payments 191,349 83,873 275,222 Less: imputed interest (17,873 ) Carrying value of operating lease liabilities 173,476 Less current portion (59,554 ) Carrying value of long-term operating lease liabilities 113,922
Teekay LNG
Lessee, Lease, Description [Line Items]
Finance Lease, Liability, Maturity [Table Text Block]	As at June 30, 2019 and December 31, 2018 , the remaining commitments related to the financial liabilities of these nine LNG carriers ( December 31, 2018 – eight LNG carriers) including the amounts to be paid for the related purchase obligations, approximated $1.9 billion ( December 31, 2018 – $1.7 billion ), including imputed interest of $495.6 million ( December 31, 2018 – $435.3 million ), repayable for the remainder of 2019 through 2034, as indicated below: Commitments At June 30, 2019 At December 31, 2018 Year $ $ Remainder of 2019 67,962 119,517 2020 134,915 118,685 2021 133,542 117,772 2022 132,312 116,978 2023 131,237 116,338 Thereafter 1,295,440 1,120,670

Write-down and Loss on Sales _2

Write-down and Loss on Sales of Vessels (Tables)	6 Months Ended
	Jun. 30, 2019
Property, Plant and Equipment [Abstract]
Schedule of Impairment and Loss on Sale of Vessels, Equipment and Other Operating Assets	The following tables contain the write-downs and loss on sales of vessels for the three and six months ended June 30, 2019 and 2018 : Three Months Ended June 30, Segment Asset Type Completion of Sale Date 2019 2018 Teekay LNG Segment – Liquefied Gas Carriers (1) 4 Multi-gas Carriers N/A — (33,000 ) Other — 170 Total — (32,830 ) Six Months Ended June 30, Segment Asset Type Completion of Sale Date 2019 2018 Teekay Parent Segment - Offshore Production (2) FPSO N/A (3,328 ) — Teekay LNG Segment - Conventional Tankers (3) Handymax N/A — (13,000 ) Teekay LNG Segment - Liquefied Gas Carriers (1) 4 Multi-gas Carriers N/A — (33,000 ) Teekay LNG Segment - Conventional Tankers (4) 2 Suezmaxes Oct/Dec-2018 — (5,662 ) Other — 170 Total (3,328 ) (51,492 ) (1) In June 2018, the carrying value for four of Teekay LNG's seven wholly-owned Multi-gas carriers, the Napa Spirit , Pan Spirit , Cathinka Spirit and Camilla Spirit , were written down to their estimated fair value, using appraised values, as a result of Teekay LNG's evaluation of alternative strategies for these assets, the current charter rate environment and the outlook for charter rates for these vessels. (2) In March 2019, the Company took an impairment charge in respect of certain of its FPSO-related assets. (3) In March 2018, the carrying value of the Alexander Spirit conventional tanker was written down to its estimated fair value, using an appraised value, as a result of changes in the Company's expectations of the vessel's future opportunities once its current charter contract ends in 2019. Teekay LNG commenced marketing the vessel for sale in 2019 and it is presented as held for sale in the consolidated balance sheets as at June 30, 2019 . (4) In June and August 2017, the charterer for the European Spirit and African Spirit Suezmax tankers gave formal notices to Teekay LNG that it would not exercise its one-year extension option under the charter contracts and redelivered the tankers in August 2017 and November 2017, respectively. Upon receiving these notifications, Teekay LNG commenced marketing the vessels for sale. Based on second-hand market comparable values at the time, Teekay LNG wrote down the vessels to their estimated resale values and they were presented as held for sale on the consolidated balance sheets as at December 31, 2017. During the six months ended June 30, 2018, Teekay LNG recorded a further write-down of the vessels to their estimated resale value. In the fourth quarter of 2018, Teekay LNG sold the European Spirit and African Spirit for net proceeds of $15.7 million and $12.8 million , respectively, using the net proceeds from the sales primarily to repay its existing term loans associated with the vessels.

Accounts Payable, Accrued Liabi

Accounts Payable, Accrued Liabilities and Other (Tables)	6 Months Ended
	Jun. 30, 2019
Payables and Accruals [Abstract]
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]	Accounts Payable, Accrued Liabilities and Other June 30, 2019 December 31, 2018 $ $ Accounts payable 117,408 31,201 Accrued liabilities Voyage and vessel expenses 113,748 98,135 Interest 31,582 47,731 Payroll and related liabilities 31,623 34,849 Distributions payable 6,486 6,426 Short-term debt 15,000 — Deferred revenues – current 31,012 30,108 In-process revenue contracts – current 5,933 5,930 Office lease liability – current ( note 2 ) 3,230 — 356,022 254,380

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Summary of Long-Term Debt	June 30, 2019 December 31, 2018 $ $ Revolving Credit Facilities 500,930 642,997 Senior Notes (8.5%) due January 15, 2020 36,712 508,577 Senior Notes (9.25%) due November 15, 2022 250,000 — Convertible Senior Notes (5%) due January 15, 2023 125,000 125,000 Norwegian Krone-denominated Bonds due through August 2023 357,454 352,973 U.S. Dollar-denominated Term Loans due through 2030 1,437,688 1,536,499 Euro-denominated Term Loans due through 2024 180,115 193,781 Other U.S. Dollar-denominated loan 3,300 3,300 Total principal 2,891,199 3,363,127 Less unamortized discount and debt issuance costs (47,874 ) (43,604 ) Total debt 2,843,325 3,319,523 Less current portion (540,440 ) (242,137 ) Long-term portion 2,302,885 3,077,386

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule of Joint Ventures	a) Vessels Under Construction Teekay LNG's share of commitments to fund newbuilding and other construction contract costs as at June 30, 2019 are as follows: Total Remainder of 2020 2021 2022 Consolidated LNG carriers (i) 60,586 9,984 9,733 27,191 13,678 Equity-accounted joint ventures (ii) 349,681 349,681 — — — 410,267 359,665 9,733 27,191 13,678 (i) In May 2019, Teekay LNG received approximately $45 million from a shipyard related to warranty claims on certain of Teekay LNG's LNG carriers and recognized the amounts as reductions to the carrying values of the applicable LNG carriers. In connection with the warranty settlement, Teekay LNG entered into an agreement in June 2019 with a contractor to supply equipment on certain of its LNG carriers in 2021 and 2022 for an estimated cost of approximately $61 million . (ii) The commitment amounts relating to Teekay LNG’s share of costs for newbuilding and other construction contracts in Teekay LNG’s equity-accounted joint ventures are based on Teekay LNG’s ownership percentage in each respective joint venture as of June 30, 2019 . These commitments are described in more detail in "Item 18 – Financial Statements: Note 16" of the Company’s Annual Report on Form 20-F for the year ended December 31, 2018 . Based on Teekay LNG's ownership percentage in each respective joint venture, Teekay LNG's equity-accounted joint ventures have secured $301.0 million of undrawn financing related to Teekay LNG's proportionate share of the remaining commitments included in the table above.

Financial Instruments (Tables)

Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments and Other Non-Financial Assets	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 Company’s financial instruments that are not accounted for at fair value on a recurring basis. June 30, 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, cash equivalents and restricted cash ( note 18 ) Level 1 322,883 322,883 505,639 505,639 Derivative instruments (note 15) Interest rate swap agreements – assets (1) Level 2 1,896 1,896 9,640 9,640 Interest rate swap agreements – liabilities (1) Level 2 (56,663 ) (56,663 ) (43,175 ) (43,175 ) Cross currency interest swap agreements – liabilities (1) Level 2 (31,006 ) (31,006 ) (29,122 ) (29,122 ) Foreign currency contracts Level 2 (101 ) (101 ) — — Stock purchase warrants Level 3 — — 12,026 12,026 Freight forward agreements Level 2 61 61 (57 ) (57 ) Other Loans to equity-accounted investments (2) 93,924 (2 ) 169,197 (2 ) Loans to equity-accounted investments – Long-term (2) 62,196 (2 ) 62,207 (2 ) Short-term debt Level 2 (15,000 ) (15,000 ) — — Long-term debt – public (note 9) Level 1 (627,981 ) (658,046 ) (856,986 ) (851,470 ) Long-term debt – non-public (note 9) Level 2 (2,215,344 ) (2,168,252 ) (2,462,537 ) (2,395,300 ) Obligations related to finance leases, including current portion ( note 6 ) Level 2 (1,826,732 ) (1,872,238 ) (1,673,845 ) (1,652,345 ) (1) The fair value of the Company's interest rate swap and cross currency swap agreements at June 30, 2019 includes $2.6 million ( December 31, 2018 - $3.2 million ) accrued interest expense which is recorded in accrued liabilities on the unaudited consolidated balance sheets. (2) In the unaudited interim consolidated financial statements, the Company’s loans to and investments in equity-accounted investments form the aggregate carrying value of the Company’s interests in entities accounted for by the equity method. The fair value of the individual components of such aggregate interests is not determinable.
Stock Purchase Warrants Changes in Fair Value Measured on Recurring Basis Using Significant Unobservable Inputs (Level 3)	Changes in fair value during the three and six months ended June 30, 2019 and 2018 for the Company’s Brookfield Transaction Warrants and the Series D Warrants, which were measured at fair value using significant unobservable inputs (Level 3), are as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Fair value at the beginning of the period 14,342 29,065 12,026 30,749 Unrealized gain included in earnings 24,584 6,206 26,900 4,522 Realized (loss) gain included in earnings (25,559 ) — (25,559 ) — Settlements (13,367 ) — (13,367 ) — Fair value at the end of the period — 35,271 — 35,271
Summary of Financing Receivables	The following table contains a summary of the Company’s carrying value of financing receivables by type of borrower and the method by which the Company monitors the credit quality of its financing receivables on a quarterly basis. Class of Financing Receivable Credit Quality Indicator Grade June 30, 2019 December 31, 2018 $ $ Direct financing leases Payment activity Performing 564,685 575,163 Other loan receivables Loans to equity-accounted investments and joint venture partners Other internal metrics Performing 156,120 231,404 Long-term receivable and accrued revenue included in accounts receivable and other assets Payment activity Performing 6,857 15,694 727,662 822,261

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Loss	As at June 30, 2019 and December 31, 2018 , the Company’s accumulated other comprehensive loss (or AOCI ) consisted of the following components: June 30, December 31, 2019 2018 $ $ Unrealized (loss) gain on qualifying cash flow hedging instruments (17,801 ) 903 Pension adjustments, net of tax recoveries (3,342 ) (3,176 ) (21,143 ) (2,273 )

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2019
Derivative [Line Items]
Schedule of Foreign Exchange Contracts, Statement of Financial Position [Table Text Block]	Foreign Exchange Risk From time to time the Company economically hedges portions of its forecasted expenditures denominated in foreign currencies with foreign currency forward contracts. As at June 30, 2019 , the Company was committed to the following foreign currency forward contracts: Contract Amount in Foreign Currency Average Forward Rate (1) Fair Value / Carrying Amount Of Asset (Liability) $ Expected Maturity 2019 2020 $ $ Euro 9,240 0.86 (101) 3,952 6,750 (1) Average contractual exchange rate represents the contracted amount of foreign currency one U.S. Dollar will buy. The Company enters into cross currency swaps, and pursuant to these swaps the Company receives the principal amount in NOK on the maturity date of the swap, in exchange for payment of a fixed U.S. Dollar amount. In addition, the cross currency swaps exchange a receipt of floating interest in NOK based on NIBOR plus a margin for a payment of U.S. Dollar fixed interest. The purpose of the cross currency swaps is to economically hedge the foreign currency exposure on the payment of interest and principal amounts of the Company’s NOK-denominated bonds due in 2020, 2021 and 2023. In addition, the cross currency swaps economically hedge the interest rate exposure on the NOK bonds due in 2020, 2021 and 2023. The Company has not designated, for accounting purposes, these cross currency swaps as cash flow hedges of its NOK-denominated bonds due in 2020, 2021 and 2023. As at June 30, 2019 , the Company was committed to the following cross currency swaps: Fair Value / Notional Notional Floating Rate Receivable Reference Margin Fixed Rate Remaining 1,000,000 134,000 NIBOR 3.70% 5.92% (17,133 ) 0.9 1,200,000 146,500 NIBOR 6.00% 7.72% (5,785 ) 2.3 850,000 102,000 NIBOR 4.60% 7.89% (8,088 ) 4.2 (31,006 )
Interest Rate Swap Agreements	As at June 30, 2019 , the Company was committed to the following interest rate swap agreements related to its LIBOR -based debt and EURIBOR -based debt, whereby certain of the Company’s floating-rate debt were swapped with fixed-rate obligations: Interest Rate Index Principal Amount Fair Value / Carrying Amount of Asset / (Liability) $ Weighted- Fixed Interest Rate (%) (1) LIBOR-Based Debt: U.S. Dollar-denominated interest rate swaps (2) LIBOR 1,011,178 (44,855 ) 3.6 3.0 EURIBOR-Based Debt: Euro-denominated interest rate swaps EURIBOR 81,059 (9,912 ) 4.2 3.8 (54,767 ) (1) Excludes the margins the Company pays on its variable-rate debt, which, as of June 30, 2019 , ranged from 0.3% to 3.95% . (2) Includes interest rate swaps with the notional amount reducing quarterly or semi-annually. Two interest rate swaps are subject to mandatory early termination in 2020 and 2021, at which time the swaps will be settled based on their fair value.
Location and Fair Value Amounts of Derivative Instruments	The following tables present the location and fair value amounts of derivative instruments, segregated by type of contract, on the Company’s unaudited consolidated balance sheets. Prepaid Expenses and Other Other Non-Current Assets Accounts Payable, Accrued Current Derivative $ $ $ $ $ As at June 30, 2019 Derivatives designated as a cash flow hedge: Interest rate swap agreements — — 3 (497 ) (3,758 ) Derivatives not designated as a cash flow hedge: Foreign currency contracts — — — (101 ) — Interest rate swap agreements 1,168 240 (2,094 ) (8,996 ) (40,833 ) Cross currency swap agreements — — (538 ) (18,887 ) (11,581 ) Forward freight agreements 61 — — — 1,229 240 (2,629 ) (28,481 ) (56,172 ) Prepaid Expenses and Other Other Non-Current Assets Accounts Payable, Accrued Current Derivative $ $ $ $ $ As at December 31, 2018 Derivatives designated as a cash flow hedge: Interest rate swap agreements 784 2,362 20 — — Derivatives not designated as a cash flow hedge: Interest rate swap agreements 2,915 2,973 (2,498 ) (7,419 ) (32,672 ) Cross currency swap agreements — — (713 ) (4,729 ) (23,680 ) Stock purchase warrants — 12,026 — — — Forward freight agreements — — — (57 ) — 3,699 17,361 (3,191 ) (12,205 ) (56,352 )
Schedule of Cash Flow Hedges	For the periods indicated, the following tables present the gains (losses) on interest rate swap agreements designated and qualifying as cash flow hedges (excluding such agreements in equity-accounted investments): Three Months Ended June 30, 2019 Amount Amount Recognized in AOCI (1) Reclassified from AOCI (2) (4,570) 157 Interest expense Three Months Ended June 30, 2018 Effective Portion Effective Portion Ineffective Recognized in AOCI (1) Reclassified from AOCI (2) Portion (3) 1,534 2 — Interest expense Six Months Ended June 30, 2019 Effective Portion Amount Recognized in AOCI (1) Reclassified from AOCI (2) (7,402) 408 Interest expense Six Months Ended June 30, 2018 Effective Portion Effective Portion Ineffective Recognized in AOCI (1) Reclassified from AOCI (2) Portion (3) 5,090 (248) 740 Interest expense (1) Recognized in accumulated other comprehensive loss (or AOCI ). (2) Recorded in AOCI during the term of the hedging relationship and reclassified to earnings. (3) Recognized in the ineffective portion of gains (losses) on derivative instruments designated and qualifying as cash flow hedges.
Effect of Gain (Loss) on Derivatives Not Designated as Hedging Instruments	as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Realized losses relating to: Interest rate swap agreements (1,785 ) (4,031 ) (3,473 ) (8,840 ) Stock purchase warrants (25,559 ) — (25,559 ) — Forward freight agreements (29 ) (18 ) (42 ) (18 ) (27,373 ) (4,049 ) (29,074 ) (8,858 ) Unrealized gains (losses) relating to: Interest rate swap agreements (8,195 ) 8,532 (14,216 ) 24,451 Foreign currency forward contracts (101 ) — (101 ) — Stock purchase warrants 24,584 6,206 26,900 4,522 Forward freight agreements 121 34 104 34 16,409 14,772 12,687 29,007 Total realized and unrealized (losses) gains on derivative instruments (10,964 ) 10,723 (16,387 ) 20,149
Effect of Gains (Losses) on Cross Currency Swaps	as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Realized losses (1,087 ) (1,798 ) (2,521 ) (3,182 ) Unrealized (losses) gains (140 ) (16,566 ) (2,060 ) 5,768 Total realized and unrealized (losses) gains on cross currency swaps (1,227 ) (18,364 ) (4,581 ) 2,586

Income Tax Expense (Recovery) (

Income Tax Expense (Recovery) (Tables)	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Components of Provision for Income Tax (Expense) Recovery	The components of the provision for income tax expense are as follows: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Current (3,219 ) (8,410 ) (8,072 ) (11,221 ) Deferred (185 ) (336 ) (368 ) (1,642 ) Income tax expense (3,404 ) (8,746 ) (8,440 ) (12,863 )
Unrecognized Tax Benefits, Recorded in Other Long-Term Liabilities	Six Months Ended June 30, 2019 2018 $ $ Balance of unrecognized tax benefits as at January 1 40,556 31,061 Increases for positions related to the current year 2,106 2,047 Changes for positions taken in prior periods 4,121 2,337 Decrease related to statute limitations — (312 ) Balance of unrecognized tax benefits as at June 30 46,783 35,133

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Schedule of Net (Loss) Income Per Share	Net Loss Per Share Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 $ $ $ $ Net loss attributable to the shareholders of Teekay Corporation – basic and diluted (39,485 ) (28,324 ) (123,742 ) (48,879 ) Weighted average number of common shares 100,783,496 100,434,512 100,652,685 98,892,574 Common stock and common stock equivalents 100,783,496 100,434,512 100,652,685 98,892,574 Loss per common share – basic and diluted (0.39 ) (0.28 ) (1.23 ) (0.49 )

Supplementary Cash Flow Infor_2

Supplementary Cash Flow Information (Tables)	6 Months Ended
	Jun. 30, 2019
Supplemental Cash Flow Elements [Abstract]
Schedule of Cash Flow, Supplemental Disclosures	Total cash, cash equivalents and restricted cash are as follows: June 30, 2019 December 31, 2018 June 30, 2018 December 31, 2017 $ $ $ $ Cash and cash equivalents 235,199 424,169 454,933 445,452 Restricted cash – current 50,798 40,493 55,466 38,179 Restricted cash – non-current 36,886 40,977 34,627 68,543 322,883 505,639 545,026 552,174

Basis of Presentation (Details)

Basis of Presentation (Details)	Jun. 30, 2019
Subsidiaries
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Ownership percentage	50.00%

Accounting Pronouncements (Deta

Accounting Pronouncements (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019USD ($)vessel	Mar. 31, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)vessel	Jun. 30, 2018USD ($)	Jan. 01, 2019USD ($)	Dec. 31, 2018USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Liability	$ 3,230			$ 3,230			$ 0
Foreign exchange (loss) gain (notes 9 and 15)	(5,851)		$ 12,529	(8,481)	$ 12,551
Investment in and loans to equity-accounted investments (notes 4 and 11a)	1,011,530			1,011,530			1,193,741
Operating lease right-of-use assets (notes 2 and 6)	$ 185,716			185,716			0
Scheduled repayments of long-term debt (note 8)				117,110	171,433
Proceeds from Lease Payments				$ 6,050
Finance Leased Assets, Number of Units | vessel	22			22
Accumulated other comprehensive loss	$ (21,143)			$ (21,143)			$ (2,273)
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Liability	173,500			173,500
Foreign exchange (loss) gain (notes 9 and 15)		$ 200
Investment in and loans to equity-accounted investments (notes 4 and 11a)	3,000			3,000
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	3,000			3,000		$ 3,000
Operating lease right-of-use assets (notes 2 and 6)	173,500			173,500		170,000
Proceeds from Lease Payments	3,000		$ 2,800		$ 5,200
Accounting Standards Update 2017-12 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets						4,800
Time-charter [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets (notes 2 and 6)	12,200			12,200		13,700
Office Building [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets (notes 2 and 6)	8,500			8,500
Time-charter [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets (notes 2 and 6)	0			0		900
Office Building [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease, Liability	$ 8,700			$ 8,700
Accumulated Other Comprehensive Loss | Accounting Standards Update 2017-12 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accumulated other comprehensive loss						$ 4,800

Revenue (Details)

Revenue (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 457,667,000	$ 405,642,000	$ 938,880,000	$ 799,664,000
Lease revenue [Member]
Disaggregation of Revenue [Line Items]
Operating Leases, Income Statement, Lease Revenue	354,410,000	302,010,000	737,553,000	596,565,000
Sales-type Lease, Interest Income, Lease Receivable	12,969,000	9,954,000	25,763,000	19,914,000
Operating Lease, Variable Lease Income	13,307,000	10,169,000	25,314,000	18,677,000
Variable Lease, Payment	16,320,000	27,426,000	27,144,000	51,708,000
Revenues	397,006,000	349,559,000	815,774,000	686,864,000
Time charters
Disaggregation of Revenue [Line Items]
Revenues	143,100,000	124,706,000	286,316,000	250,788,000
Voyage charters
Disaggregation of Revenue [Line Items]
Revenues	195,663,000	156,814,000	421,240,000	300,830,000
Bareboat charters
Disaggregation of Revenue [Line Items]
Revenues	6,129,000	5,734,000	12,191,000	11,111,000
FPSO contracts
Disaggregation of Revenue [Line Items]
Revenues	57,828,000	66,429,000	107,266,000	132,399,000
Management fees and other
Disaggregation of Revenue [Line Items]
Revenues	54,947,000	51,959,000	111,867,000	104,536,000
Non-lease revenue
Disaggregation of Revenue [Line Items]
Revenues	60,661,000	56,083,000	123,106,000	112,800,000
Teekay Parent
Disaggregation of Revenue [Line Items]
Revenues	105,817,000	112,612,000	205,914,000	230,526,000
Operating Segments | Teekay LNG
Disaggregation of Revenue [Line Items]
Revenues	153,060,000	122,315,000	302,804,000	237,621,000
Operating Segments | Teekay LNG | Liquefied Gas Carriers
Disaggregation of Revenue [Line Items]
Revenues	150,691,000	112,172,000	297,673,000	217,221,000
Operating Segments | Teekay LNG | Liquefied Gas Carriers | Time charters
Disaggregation of Revenue [Line Items]
Revenues	133,684,000	96,857,000	264,459,000	190,316,000
Operating Segments | Teekay LNG | Liquefied Gas Carriers | Voyage charters
Disaggregation of Revenue [Line Items]
Revenues	8,858,000	6,767,000	18,018,000	10,390,000
Operating Segments | Teekay LNG | Liquefied Gas Carriers | Bareboat charters
Disaggregation of Revenue [Line Items]
Revenues	6,129,000	5,734,000	12,191,000	11,111,000
Operating Segments | Teekay LNG | Liquefied Gas Carriers | FPSO contracts
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments | Teekay LNG | Liquefied Gas Carriers | Management fees and other
Disaggregation of Revenue [Line Items]
Revenues	2,020,000	2,814,000	3,005,000	5,404,000
Operating Segments | Teekay LNG | Conventional Tankers
Disaggregation of Revenue [Line Items]
Revenues	2,369,000	10,143,000	5,131,000	20,400,000
Operating Segments | Teekay LNG | Conventional Tankers | Time charters
Disaggregation of Revenue [Line Items]
Revenues	2,369,000	4,316,000	5,131,000	9,714,000
Operating Segments | Teekay LNG | Conventional Tankers | Voyage charters
Disaggregation of Revenue [Line Items]
Revenues	0	5,719,000	0	10,470,000
Operating Segments | Teekay LNG | Conventional Tankers | Bareboat charters
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments | Teekay LNG | Conventional Tankers | FPSO contracts
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments | Teekay LNG | Conventional Tankers | Management fees and other
Disaggregation of Revenue [Line Items]
Revenues	0	108,000	0	216,000
Operating Segments | Teekay Tankers [Member] | Conventional Tankers
Disaggregation of Revenue [Line Items]
Revenues	202,277,000	171,659,000	434,778,000	340,124,000
Operating Segments | Teekay Tankers [Member] | Conventional Tankers | Time charters
Disaggregation of Revenue [Line Items]
Revenues	1,456,000	17,384,000	4,866,000	39,494,000
Operating Segments | Teekay Tankers [Member] | Conventional Tankers | Voyage charters
Disaggregation of Revenue [Line Items]
Revenues	186,805,000	144,328,000	403,222,000	279,970,000
Operating Segments | Teekay Tankers [Member] | Conventional Tankers | Bareboat charters
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments | Teekay Tankers [Member] | Conventional Tankers | FPSO contracts
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments | Teekay Tankers [Member] | Conventional Tankers | Management fees and other
Disaggregation of Revenue [Line Items]
Revenues	14,016,000	9,947,000	26,690,000	20,660,000
Operating Segments | Teekay Parent
Disaggregation of Revenue [Line Items]
Revenues	47,989,000
Operating Segments | Teekay Parent | Offshore Production
Disaggregation of Revenue [Line Items]
Revenues	57,828,000	66,429,000	107,266,000	132,399,000
Operating Segments | Teekay Parent | Offshore Production | Time charters
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments | Teekay Parent | Offshore Production | Voyage charters
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments | Teekay Parent | Offshore Production | Bareboat charters
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments | Teekay Parent | Offshore Production | FPSO contracts
Disaggregation of Revenue [Line Items]
Revenues	57,828,000	66,429,000	107,266,000	132,399,000
Operating Segments | Teekay Parent | Offshore Production | Management fees and other
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments | Teekay Parent | Teekay Parent | Time charters
Disaggregation of Revenue [Line Items]
Revenues	8,078,000
Operating Segments | Teekay Parent | Teekay Parent | Voyage charters
Disaggregation of Revenue [Line Items]
Revenues	0
Operating Segments | Teekay Parent | Teekay Parent | Bareboat charters
Disaggregation of Revenue [Line Items]
Revenues	0
Operating Segments | Teekay Parent | Teekay Parent | FPSO contracts
Disaggregation of Revenue [Line Items]
Revenues	0
Operating Segments | Teekay Parent | Teekay Parent | Management fees and other
Disaggregation of Revenue [Line Items]
Revenues	39,911,000
Operating Segments | Teekay Parent | Other
Disaggregation of Revenue [Line Items]
Revenues		46,183,000	98,648,000	98,127,000
Operating Segments | Teekay Parent | Other | Time charters
Disaggregation of Revenue [Line Items]
Revenues		7,588,000	14,347,000	20,682,000
Operating Segments | Teekay Parent | Other | Voyage charters
Disaggregation of Revenue [Line Items]
Revenues		0	0	0
Operating Segments | Teekay Parent | Other | Bareboat charters
Disaggregation of Revenue [Line Items]
Revenues		0	0	0
Operating Segments | Teekay Parent | Other | FPSO contracts
Disaggregation of Revenue [Line Items]
Revenues		0	0	0
Operating Segments | Teekay Parent | Other | Management fees and other
Disaggregation of Revenue [Line Items]
Revenues		38,595,000	84,301,000	77,445,000
Intersegment Eliminations
Disaggregation of Revenue [Line Items]
Revenues	(3,487,000)	(944,000)	(4,616,000)	(8,607,000)
Intersegment Eliminations | Time charters
Disaggregation of Revenue [Line Items]
Revenues	(2,487,000)	(1,439,000)	(2,487,000)	(9,418,000)
Intersegment Eliminations | Voyage charters
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Intersegment Eliminations | Bareboat charters
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Intersegment Eliminations | FPSO contracts
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Intersegment Eliminations | Management fees and other
Disaggregation of Revenue [Line Items]
Revenues	(1,000,000)	495,000	(2,129,000)	811,000
Intersegment Eliminations | Teekay LNG | Liquefied Gas Carriers
Disaggregation of Revenue [Line Items]
Revenues	2,487,000	1,439,000	2,487,000	9,418,000
Intersegment Eliminations | Teekay Tankers [Member] | Conventional Tankers
Disaggregation of Revenue [Line Items]
Revenues	(1,000,000)	0	(2,129,000)	0
Non-lease [Member] | Management fees and other
Disaggregation of Revenue [Line Items]
Revenues	54,947,000	51,959,000	111,867,000	104,536,000
Non-lease [Member] | Non-lease revenue
Disaggregation of Revenue [Line Items]
Revenues	$ 5,714,000	$ 4,124,000	$ 11,239,000	$ 8,264,000

Revenue Operating Leases (Detai

Revenue Operating Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Property Subject to or Available for Operating Lease [Line Items]
Lessor, Operating Lease, Payments to be Received, Remainder of Fiscal Year	$ 387,500
Operating Leases, Future Minimum Payments Receivable, Remainder of Fiscal Year		$ 630,800
Lessor, Operating Lease, Payments to be Received, Two Years	647,400
Lessor, Operating Lease, Payments to be Received, Three Years	533,200
Lessor, Operating Lease, Payments to be Received, Rolling Year Four	429,700
Lessor, Operating Lease, Payments to be Received, Five Years	319,700
Operating Leases, Future Minimum Payments Receivable, in Two Years		524,600
Operating Leases, Future Minimum Payments Receivable, in Three Years		457,500
Operating Leases, Future Minimum Payments Receivable, in Four Years		382,000
Operating Leases, Future Minimum Payments Receivable, in Five Years		291,800
Property, Plant and Equipment, Net	5,648,259	5,517,133
Accumulated depreciation on vessels and equipment	1,294,622	1,293,447
Assets Leased to Others [Member]
Property Subject to or Available for Operating Lease [Line Items]
Property, Plant and Equipment, Net	3,500,000	3,400,000
Property, Plant and Equipment, Gross	4,300,000	4,300,000
Accumulated depreciation on vessels and equipment	$ 900,000	$ 800,000

Revenue Direct Financing Leases

Revenue Direct Financing Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Property Subject to or Available for Operating Lease [Line Items]
Direct Financing Lease, Lease Receivable	$ 865,333	$ 897,130
Residual Value of Leased Asset	291,098	291,098
Deferred Costs, Leasing, Net	312	329
Deferred Lease Income, after Accumulated Amortization	592,058	613,394
Direct Financing Lease, Net Investment in Lease	564,685	575,163
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Four Years		64,200
Net Investment in Lease, Current	(13,082)	(12,635)
Net investment in direct financing leases – non-current (notes 3 and 6)	551,603	562,528
Teekay LNG
Property Subject to or Available for Operating Lease [Line Items]
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Remainder of Fiscal Year	32,300
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Next Twelve Months		64,200
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Two Years	64,200	64,300
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Three Years	64,200	64,200
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Four Years	64,200
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Five Years	64,000	64,000
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Thereafter	$ 576,400	$ 576,200

Revenue Contract costs, assets

Revenue Contract costs, assets and liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Jan. 01, 2018
Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Liability, Current	$ 31,012		$ 31,012		$ 30,108
Contract with Customer, Liability	27,200	$ 23,300	27,200	$ 23,300	$ 26,400	$ 29,500
Contract with customer, liability, revenue recognized	$ 20,400	$ 20,500	$ 26,400	$ 28,900

Related Party Tranactions - Na

Related Party Tranactions - Narrative (Details)	May 08, 2019vessel	Jan. 01, 2018Subsidiaries	May 08, 2019USD ($)	Sep. 30, 2018	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	May 08, 2019USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)	Mar. 31, 2018USD ($)
Business Acquisition [Line Items]
Loss on deconsolidation of Teekay Offshore (note 4)					$ 0	$ 0		$ 0	$ 7,070,000
Teekay Offshore [Member]
Business Acquisition [Line Items]
Due from Related Parties										$ 83,100,000
Due to Related Parties										$ 59,300,000
Revenue from Related Parties			$ 2,300,000			4,500,000	$ 7,600,000		11,100,000
Teekay Offshore [Member] | Brookfield Business Partners L.P. [Member]
Business Acquisition [Line Items]
Percentage of ownership acquired		100.00%
Number of Subsidiaries | Subsidiaries		7
Revolving Credit Facilities
Business Acquisition [Line Items]
Credit facility, maximum borrowing capacity					886,779,169			886,779,169
Revolving Credit Facilities | Teekay Offshore [Member]
Business Acquisition [Line Items]
Credit facility, maximum borrowing capacity											$ 125,000,000
Revolving Credit Facilities | Teekay Offshore [Member] | Brookfield Business Partners L.P. [Member]
Business Acquisition [Line Items]
Credit facility, maximum borrowing capacity											100,000,000
Parent Company [Member] | Revolving Credit Facilities | Teekay Offshore [Member]
Business Acquisition [Line Items]
Credit facility, maximum borrowing capacity											$ 25,000,000
Technical Services [Member] | Teekay Offshore [Member]
Business Acquisition [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party			3,300,000			6,800,000			13,300,000
Time-Charter Hire Expense [Member] | Teekay Lng Marubeni Joint Venture [Member]
Business Acquisition [Line Items]
Additional Time Period For Fixed Rate Time Charters Contract				2 years
Related Party Transaction, Expenses from Transactions with Related Party					3,100,000			8,700,000
Time-Charter Hire Expense [Member] | Teekay Offshore [Member]
Business Acquisition [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party			$ 6,100,000			14,000,000	$ 20,800,000		28,000,000
Shuttle Tankers | Teekay Offshore [Member]
Business Acquisition [Line Items]
Number Of Vessels | vessel	2
FSO | Teekay Offshore [Member]
Business Acquisition [Line Items]
Number Of Vessels | vessel	3
LNG Carriers [Member] | Equity Method Investee [Member]
Business Acquisition [Line Items]
Revenue from Related Parties					$ 16,800,000	$ 13,100,000		$ 32,600,000	$ 25,700,000
Teekay Lng Marubeni Joint Venture [Member]
Business Acquisition [Line Items]
Equity Method Investment, Ownership Percentage					52.00%			52.00%

Related Party Tranactions Relat

Related Party Tranactions Related Party Transactions (Details)

May 08, 2019USD ($)vessel

Jan. 01, 2018Subsidiaries

May 31, 2019USD ($)

May 08, 2019USD ($)

Sep. 30, 2018

Jun. 30, 2019USD ($)

Jun. 30, 2018USD ($)

May 08, 2019USD ($)

Jun. 30, 2019USD ($)

Jun. 30, 2018USD ($)

Dec. 31, 2018USD ($)

Mar. 31, 2018USD ($)

Related Party Transaction [Line Items]

Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest

49.00%

Proceeds from sale of equity-accounted investments and related assets (note 4)

$ 100,000,000

$ 54,438,000

Loss on deconsolidation of Teekay Offshore (note 4)

$ 0

$ 0

0

(7,070,000)

Teekay Lng Marubeni Joint Venture [Member] | Time-Charter Hire Expense [Member]

Related Party Transaction [Line Items]

Related Party Transaction, Expenses from Transactions with Related Party

3,100,000

8,700,000

Additional Time Period For Fixed Rate Time Charters Contract

2 years

Technical Services [Member] | Teekay Offshore [Member]

Related Party Transaction [Line Items]

Related Party Transaction, Expenses from Transactions with Related Party

$ 9,600,000

Teekay Offshore [Member]

Related Party Transaction [Line Items]

Revenue from Related Parties

$ 2,300,000

4,500,000

7,600,000

11,100,000

Due from Related Parties

$ 83,100,000

Due to Related Parties

$ 59,300,000

Teekay Offshore [Member] | Technical Services [Member]

Related Party Transaction [Line Items]

Related Party Transaction, Expenses from Transactions with Related Party

3,300,000

6,800,000

13,300,000

Teekay Offshore [Member] | Time-Charter Hire Expense [Member]

Related Party Transaction [Line Items]

Related Party Transaction, Expenses from Transactions with Related Party

6,100,000

14,000,000

20,800,000

28,000,000

LNG Carriers [Member] | Equity Method Investee [Member]

Related Party Transaction [Line Items]

Revenue from Related Parties

$ 16,800,000

$ 13,100,000

$ 32,600,000

$ 25,700,000

Shuttle Tankers | Teekay Offshore [Member]

Related Party Transaction [Line Items]

Number Of Vessels | vessel

2

FSO | Teekay Offshore [Member]

Related Party Transaction [Line Items]

Number Of Vessels | vessel

3

Teekay Lng Marubeni Joint Venture [Member]

Related Party Transaction [Line Items]

Equity Method Investment, Ownership Percentage

52.00%

52.00%

Teekay Offshore [Member]

Related Party Transaction [Line Items]

Due from Affiliate, Noncurrent

$ 25,000,000

$ 25,000,000

$ 25,000,000

Proceeds from sale of equity-accounted investments and related assets (note 4)

100,000,000

$ 100,000,000

Equity Method Investment, Other than Temporary Impairment

$ 64,900,000

Gain (Loss) on Sale of Equity Investments

$ 8,900,000

Teekay Offshore [Member] | Brookfield Business Partners L.P. [Member]

Related Party Transaction [Line Items]

Percentage of ownership acquired

100.00%

Number of Subsidiaries | Subsidiaries

7

Revolving Credit Facilities

Related Party Transaction [Line Items]

Credit facility, maximum borrowing capacity

$ 886,779,169

$ 886,779,169

Revolving Credit Facilities | Teekay Offshore [Member]

Related Party Transaction [Line Items]

Credit facility, maximum borrowing capacity

$ 125,000,000

Revolving Credit Facilities | Teekay Offshore [Member] | Brookfield Business Partners L.P. [Member]

Related Party Transaction [Line Items]

Credit facility, maximum borrowing capacity

100,000,000

Parent Company [Member] | Revolving Credit Facilities | Teekay Offshore [Member]

Related Party Transaction [Line Items]

Credit facility, maximum borrowing capacity

$ 25,000,000

Segment Reporting - Narrative (

Segment Reporting - Narrative (Detail) $ in Thousands	1 Months Ended	3 Months Ended		4 Months Ended	6 Months Ended
	May 08, 2019USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	May 08, 2019USD ($)	Jun. 30, 2019USD ($)subsidiarysegment	Jun. 30, 2018USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment					3
Number of lines of businesses, more than | segment					1
Equity (loss) income (note 4) | $		$ (6,284)	$ 837		$ (67,937)	$ 27,954
Teekay Offshore [Member]
Segment Reporting Information [Line Items]
Equity (loss) income (note 4) | $	$ 0		$ (9,300)	$ (3,000)		$ (8,700)
Subsidiaries
Segment Reporting Information [Line Items]
Number of Subsidiaries | subsidiary					2

Segment Reporting - Revenues (D

Segment Reporting - Revenues (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Revenues	$ 457,667,000	$ 405,642,000	$ 938,880,000	$ 799,664,000
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	(3,487,000)	(944,000)	(4,616,000)	(8,607,000)
Teekay LNG | Operating Segments
Segment Reporting Information [Line Items]
Revenues	153,060,000	122,315,000	302,804,000	237,621,000
Teekay LNG | Liquefied Gas Carriers | Operating Segments
Segment Reporting Information [Line Items]
Revenues	150,691,000	112,172,000	297,673,000	217,221,000
Teekay LNG | Liquefied Gas Carriers | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	2,487,000	1,439,000	2,487,000	9,418,000
Teekay LNG | Conventional Tankers | Operating Segments
Segment Reporting Information [Line Items]
Revenues	2,369,000	10,143,000	5,131,000	20,400,000
Teekay Tankers [Member] | Conventional Tankers | Operating Segments
Segment Reporting Information [Line Items]
Revenues	202,277,000	171,659,000	434,778,000	340,124,000
Teekay Tankers [Member] | Conventional Tankers | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	(1,000,000)	0	(2,129,000)	0
Teekay Parent
Segment Reporting Information [Line Items]
Revenues	105,817,000	112,612,000	205,914,000	230,526,000
Teekay Parent | Operating Segments
Segment Reporting Information [Line Items]
Revenues	47,989,000
Teekay Parent | Offshore Production | Operating Segments
Segment Reporting Information [Line Items]
Revenues	57,828,000	66,429,000	107,266,000	132,399,000
Teekay Parent | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues	47,989,000	46,183,000	98,648,000	98,127,000
Teekay Corporation [Member] | Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues	$ 3,487,000	$ 1,439,000	$ 4,616,000	$ 9,418,000

Segment Reporting - Operating I

Segment Reporting - Operating Income (Loss) (Detail) - USD ($) $ in Thousands	May 08, 2019	May 08, 2019	Jun. 30, 2019	Jun. 30, 2018	May 08, 2019	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Equity (loss) income (note 4)			$ (6,284)	$ 837		$ (67,937)	$ 27,954
Operating Income (Loss)			71,463	1,921		155,695	20,426
Teekay LNG | Operating Segments
Segment Reporting Information [Line Items]
Operating Income (Loss)			74,677	10,505		144,038	35,647
Teekay LNG | Liquefied Gas Carriers | Operating Segments
Segment Reporting Information [Line Items]
Operating Income (Loss)			74,244	9,445		144,687	53,990
Teekay LNG | Conventional Tankers | Operating Segments
Segment Reporting Information [Line Items]
Operating Income (Loss)			433	1,060		(649)	(18,343)
Teekay Tankers [Member] | Conventional Tankers | Operating Segments
Segment Reporting Information [Line Items]
Operating Income (Loss)			5,051	(13,415)		37,148	(21,836)
Teekay Parent
Segment Reporting Information [Line Items]
Operating Income (Loss)			(8,265)	4,831		(25,491)	6,615
Teekay Parent | Offshore Production | Operating Segments
Segment Reporting Information [Line Items]
Operating Income (Loss)			(5,987)	5,541		(18,544)	12,423
Teekay Parent | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)			$ (2,278)	(710)		(6,947)	(5,808)
Teekay Offshore [Member]
Segment Reporting Information [Line Items]
Gain (Loss) on Sale of Equity Investments	$ 8,900
Equity Method Investment, Other than Temporary Impairment						$ 64,900
Teekay Offshore [Member]
Segment Reporting Information [Line Items]
Equity (loss) income (note 4)		$ 0		$ (9,300)	$ (3,000)		$ (8,700)

Segment Reporting - Reconciliat

Segment Reporting - Reconciliation of Total Segment Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total assets	$ 8,126,018	$ 8,391,670
Segment Reconciling Items | Cash and cash equivalents
Segment Reporting Information [Line Items]
Total assets	235,199	424,169
Segment Reconciling Items | Other assets not allocated
Segment Reporting Information [Line Items]
Total assets	130,348	70,153
Eliminations
Segment Reporting Information [Line Items]
Total assets	(32,983)	(19,414)
Teekay LNG | Liquefied Gas Carriers | Operating Segments
Segment Reporting Information [Line Items]
Total assets	5,207,739	5,188,088
Teekay LNG | Conventional Tankers | Operating Segments
Segment Reporting Information [Line Items]
Total assets	13,748	39,450
Teekay Tankers [Member] | Conventional Tankers | Operating Segments
Segment Reporting Information [Line Items]
Total assets	2,118,499	2,106,169
Teekay Parent | Corporate, Non-Segment
Segment Reporting Information [Line Items]
Total assets	91,683	25,224
Teekay Parent | Conventional Tankers | Operating Segments
Segment Reporting Information [Line Items]
Total assets	0	13,056
Teekay Parent | Offshore Production | Operating Segments
Segment Reporting Information [Line Items]
Total assets	361,785	311,550
Teekay Offshore [Member] | Offshore Production | Operating Segments
Segment Reporting Information [Line Items]
Total assets	$ 0	$ 233,225

Leases Obligations relating to

Leases Obligations relating to Finance Leases (Details)	1 Months Ended					3 Months Ended	6 Months Ended		12 Months Ended	35 Months Ended	36 Months Ended
	May 31, 2019USD ($)	Jan. 31, 2019	Nov. 30, 2018USD ($)vessel	Sep. 30, 2018USD ($)	Jul. 31, 2017USD ($)	Jun. 30, 2019USD ($)vessel	Jun. 30, 2019USD ($)vessellease	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)vessellease	Dec. 31, 2018USD ($)vessel	Jan. 31, 2019companylease	Jul. 01, 2019vessel	Nov. 01, 2018vessel
Obligations relating to Finance Leases [Line Items]
Finance Lease, Liability						$ 1,826,732,000	$ 1,826,732,000		$ 1,673,845,000	$ 1,673,845,000
Proceeds from financing related to sale-leaseback of vessels							$ 222,400,000	$ 243,812,000
Finance Leased Assets, Number of Units | vessel						22	22
Current obligations related to finance leases (note 6)						$ (89,922,000)	$ (89,922,000)		(102,115,000)	(102,115,000)
Long-term obligations related to finance leases (note 6)						$ 1,736,810,000	$ 1,736,810,000		$ 1,571,730,000	$ 1,571,730,000
Teekay LNG
Obligations relating to Finance Leases [Line Items]
Sale Leaseback Transaction, Lease Terms		P15Y
Lessee, Finance Lease, Option to Extend		P5Y
Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Finance Lease, Weighted Average Discount Rate, Percent						7.70%	7.70%		7.50%	7.50%
Number Of Vessels | vessel									6
Suezmax Tankers [Member] | Teekay LNG
Obligations relating to Finance Leases [Line Items]
Finance Lease, Liability, Payment, Due									$ 24,200,000	$ 24,200,000
Lessee, Operating Lease, Liability, Undiscounted Excess Amount						$ 200,000	$ 200,000
LNG Carriers [Member]
Obligations relating to Finance Leases [Line Items]
Sale Leaseback Transaction, Imputed Interest Rate											5.20%
Finance Lease Obligations [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Number of Lessors | vessel							16
Actual Hull Coverage Ratio						133.00%	133.00%		122.00%	122.00%
Debt Covenant Minimum Hull Coverage Ratio							100.00%
Bareboat charters | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Debt Covenant Minimum Free Liquidity And Undrawn Revolving Credit Line						$ 35,000,000	$ 35,000,000
Debt Covenant Minimum Free Liquidity And Undrawn Revolving Credit Line As Percentage Of Debt						5.00%	5.00%
May 2019 Sale Leaseback [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Proceeds from financing related to sale-leaseback of vessels	$ 63,700,000
Finance Leased Assets, Number of Units	0
November 2018 Sale-leaseback Transaction [Member] | Finance Lease Obligations [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Proceeds from financing related to sale-leaseback of vessels			$ 84,700,000
Finance Leased Assets, Number of Units | vessel			4
Aframax Tanker [Member] | Finance Lease Obligations [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Proceeds from financing related to sale-leaseback of vessels				$ 156,600,000
Suezmax Tanker Sale Leaseback [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Proceeds from financing related to sale-leaseback of vessels					$ 153,000,000
July 2017 Sale Leaseback [Member] | Finance Lease Obligations [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Period Required to Maintain 90% Hull Coverage Ratio									3 years
July 2017 Sale Leaseback [Member] | Bareboat charters | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Number Of Vessels | vessel									4
Debt Covenant Minimum Hull Coverage Ratio, Years 1, 2 and 3							90.00%
Minimum [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Sale Leaseback Transaction, Lease Terms					P9Y
Minimum [Member] | LNG Carriers [Member]
Obligations relating to Finance Leases [Line Items]
Sale Leaseback Transaction, Lease Terms											P10Y
Maximum | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Sale Leaseback Transaction, Lease Terms					P12Y
Maximum | LNG Carriers [Member]
Obligations relating to Finance Leases [Line Items]
Sale Leaseback Transaction, Lease Terms											P15Y
Vessels Four [Member] | Finance Lease Obligations [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Finance Leased Assets, Number of Units | vessel						4	4
Suezmax, Aframax and LR2 Vessels [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Debt Covenant Minimum Hull Coverage Ratio, Year 2							78.00%
Debt Covenant Minimum Hull Coverage Ratio, Years 3 and 4							80.00%
Finance Lease, Liability, Payment, Due						$ 632,000,000	$ 632,000,000		$ 557,100,000	$ 557,100,000
Debt Covenant Minimum Hull Coverage Ratio, Thereafter							90.00%
Suezmax, Aframax and LR2 Vessels [Member] | Finance Lease Obligations [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Lessee, Operating Lease, Liability, Undiscounted Excess Amount						$ 203,200,000	$ 203,200,000		$ 181,800,000	$ 181,800,000
Actual Hull Coverage Ratio									96.50%	96.50%
Debt Covenant Minimum Hull Coverage Ratio						75.00%
Aframax Tanker [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Debt Covenant Minimum Hull Coverage Ratio, Year 1							75.00%
Debt Covenant Minimum Hull Coverage Ratio, Year 2							78.00%
Debt Covenant Minimum Hull Coverage Ratio, Years 3 and 4							80.00%
Debt Covenant Minimum Hull Coverage Ratio, Thereafter							90.00%
Actual Hull Coverage Ratio						102.00%	102.00%		91.00%	91.00%
Aframax Tanker [Member] | Finance Lease Obligations [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Number Of Vessels Obligated to Purchase						$ 6	$ 6
Aframax Tanker [Member] | November 2018 Sale-leaseback Transaction [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Finance Leased Assets, Number of Units | vessel													2
Aframax Tanker [Member] | Aframax Tanker [Member] | Finance Lease Obligations [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Finance Leased Assets, Number of Units | vessel			6
Suezmax Tankers [Member] | Teekay LNG
Obligations relating to Finance Leases [Line Items]
Finance Leased Assets, Number of Units | vessel									1	1
Suezmax Tankers [Member] | Finance Lease Obligations [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Number Of Vessels Obligated to Purchase						$ 2	$ 2
Debt Covenant Minimum Hull Coverage Ratio, Thereafter						100.00%
Actual Hull Coverage Ratio						112.00%	112.00%		101.00%	101.00%
Suezmax Tankers [Member] | November 2018 Sale-leaseback Transaction [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Finance Leased Assets, Number of Units | vessel													1
Suezmax Tankers [Member] | Suezmax Tanker Sale Leaseback [Member] | Option to Purchase July 2020-2029 [Member]
Obligations relating to Finance Leases [Line Items]
Number Of Vessels | vessel							16
Suezmax Tankers [Member] | Suezmax Tanker Sale Leaseback [Member] | Finance Lease Obligations [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Finance Leased Assets, Number of Units | vessel												4
LR2 Tankers [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Number Of Vessels | vessel							2
LR2 Tankers [Member] | November 2018 Sale-leaseback Transaction [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Finance Leased Assets, Number of Units | vessel													1
Vessel Two [Member] | Finance Lease Obligations [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Finance Leased Assets, Number of Units | vessel						2	2
LNG Carriers [Member]
Obligations relating to Finance Leases [Line Items]
Finance Lease, Liability, Payments, Due Next Twelve Months						$ 67,962,000	$ 67,962,000		$ 119,517,000	$ 119,517,000
Finance Lease, Liability, Payments, Due Year Two						134,915,000	134,915,000		118,685,000	118,685,000
Finance Lease, Liability, Payments, Due Year Three						133,542,000	133,542,000		117,772,000	117,772,000
Finance Lease, Liability, Payments, Due Year Four						132,312,000	132,312,000		116,978,000	116,978,000
Finance Lease, Liability, Payments, Due Year Five						131,237,000	131,237,000		116,338,000	116,338,000
Finance Lease, Liability, Payments, Due after Year Five						1,295,440,000	1,295,440,000		1,120,670,000	1,120,670,000
LNG Carriers [Member] | Teekay LNG
Obligations relating to Finance Leases [Line Items]
Finance Lease, Liability						1,399,796,000	$ 1,399,796,000		$ 1,274,569,000	$ 1,274,569,000
Number Of Vessels							9		8	8
Number of Lessors | company											9
Finance Lease, Liability, Payment, Due						1,900,000,000	$ 1,900,000,000		$ 1,700,000,000	$ 1,700,000,000
Lessee, Operating Lease, Liability, Undiscounted Excess Amount						495,600,000	495,600,000		435,300,000	435,300,000
Suezmax, Aframax and LR2 Vessels [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Finance Lease, Liability, Payments, Due Next Twelve Months						30,336,000	30,336,000		47,962,000	47,962,000
Finance Lease, Liability, Payments, Due Year Two						56,364,000	56,364,000		47,373,000	47,373,000
Finance Lease, Liability, Payments, Due Year Three						56,202,000	56,202,000		47,237,000	47,237,000
Finance Lease, Liability, Payments, Due Year Four						56,193,000	56,193,000		47,230,000	47,230,000
Finance Lease, Liability, Payments, Due Year Five						56,184,000	56,184,000		47,222,000	47,222,000
Finance Lease, Liability, Payments, Due after Year Five						376,750,000	376,750,000		320,064,000	320,064,000
Suezmax Tankers [Member] | Teekay LNG
Obligations relating to Finance Leases [Line Items]
Finance Lease, Liability						0	0		23,987,000	23,987,000
Suezmax Tankers [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Finance Lease, Liability						222,859,000	222,859,000		165,145,000	165,145,000
Aframax Tanker [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Finance Lease, Liability						178,518,000	178,518,000		184,021,000	184,021,000
LR2 Tankers [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Finance Lease, Liability						$ 25,559,000	$ 25,559,000		$ 26,123,000	$ 26,123,000
Variable Interest Entity, Primary Beneficiary [Member] | Teekay LNG
Obligations relating to Finance Leases [Line Items]
Number of Lessors | lease											8
Variable Interest Entity, Primary Beneficiary [Member] | Suezmax, Aframax and LR2 Vessels [Member] | Finance Lease Obligations [Member] | Teekay Tankers [Member]
Obligations relating to Finance Leases [Line Items]
Number of Lessors | vessel							14

Leases Obligations relating t_2

Leases Obligations relating to Operating leases (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended	35 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)vessellease	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)vessellease	Dec. 31, 2018USD ($)vessel
Operating Leased Assets [Line Items]
Current portion of operating lease liabilities (notes 2 and 6)	$ (59,554)		$ (59,554)		$ 0	$ 0
Operating Leases, Rent Expense	28,817	$ 20,648	58,655	$ 40,059
Operating Leases, Future Minimum Payments Receivable, Remainder of Fiscal Year					630,800	630,800
Operating Leases, Future Minimum Payments Receivable, in Two Years					524,600	524,600
Operating Leases, Future Minimum Payments Receivable, in Three Years					457,500	457,500
Operating Leases, Future Minimum Payments Receivable, in Four Years					382,000	382,000
Operating Leases, Future Minimum Payments Receivable, in Five Years					291,800	291,800
Operating lease right-of-use assets (notes 2 and 6)	185,716		185,716		0	0
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	53,510		53,510
Lessee, Operating Lease, Liability, Payments, Due Year Two	99,021		99,021
Lessee, Operating Lease, Liability, Payments, Due Year Three	76,585		76,585
Lessee, Operating Lease, Liability, Payments, Due Year Four	31,167		31,167
Lessee, Operating Lease, Liability, Payments, Due Year Five	9,227		9,227
Lessee, Operating Lease, Liability, Payments, Due after Year Five	5,712		5,712
Lessee, Operating Lease, Liability, Payments, Due	275,222		275,222
Operating Lease, Liability	3,230		3,230		0	0
Long-term operating lease liabilities (notes 2 and 6)	113,922		113,922		$ 0	0
Lease [Member]
Operating Leased Assets [Line Items]
Current portion of operating lease liabilities (notes 2 and 6)	(59,554)		(59,554)
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	36,398		36,398
Lessee, Operating Lease, Liability, Payments, Due Year Two	65,362		65,362
Lessee, Operating Lease, Liability, Payments, Due Year Three	51,672		51,672
Lessee, Operating Lease, Liability, Payments, Due Year Four	22,978		22,978
Lessee, Operating Lease, Liability, Payments, Due Year Five	9,227		9,227
Lessee, Operating Lease, Liability, Payments, Due after Year Five	5,712		5,712
Lessee, Operating Lease, Liability, Payments, Due	191,349		191,349
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(17,873)		(17,873)
Operating Lease, Liability	173,476		173,476
Long-term operating lease liabilities (notes 2 and 6)	113,922		113,922
Non-lease [Member]
Operating Leased Assets [Line Items]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	17,112		17,112
Lessee, Operating Lease, Liability, Payments, Due Year Two	33,659		33,659
Lessee, Operating Lease, Liability, Payments, Due Year Three	24,913		24,913
Lessee, Operating Lease, Liability, Payments, Due Year Four	8,189		8,189
Lessee, Operating Lease, Liability, Payments, Due Year Five	0		0
Lessee, Operating Lease, Liability, Payments, Due after Year Five	0		0
Lessee, Operating Lease, Liability, Payments, Due	$ 83,873		$ 83,873
Teekay Tankers [Member]
Operating Leased Assets [Line Items]
Number Of Vessels | vessel					6
Lessor, Operating Lease, Term of Contract	24 months		24 months
Lessee, Operating Sublease, Option to Extend			one-year
Teekay Tankers [Member] | Time-charter [Member]
Operating Leased Assets [Line Items]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 6,000		$ 6,000
Lessee, Operating Lease, Liability, Payments, Due Year Two	$ 600		$ 600
Teekay Corporation [Member]
Operating Leased Assets [Line Items]
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year					$ 116,300	116,300
Operating Leases, Future Minimum Payments, Due in Two Years					90,400	90,400
Lessee, Operating Lease, Liability, Payments, Due Year Three					53,400	53,400
Lessee, Operating Lease, Liability, Payments, Due Year Four					9,100	9,100
Lessee, Operating Lease, Liability, Payments, Due Year Five					9,100	9,100
Lessee, Operating Lease, Liability, Payments, Due after Year Five					$ 5,600	$ 5,600
Operating Lease, Weighted Average Remaining Lease Term	3 years 11 days		3 years 11 days
Operating Lease, Weighted Average Discount Rate, Percent	6.20%		6.20%
LR2 Tankers [Member] | Teekay Tankers [Member]
Operating Leased Assets [Line Items]
Number Of Vessels | vessel			2
Operating lease right-of-use assets (notes 2 and 6)	$ 14,700		$ 14,700
Time-Charter Hire Expense [Member]
Operating Leased Assets [Line Items]
Short-term Lease, Cost	4,900		$ 9,200
LNG Carriers [Member] | Teekay LNG
Operating Leased Assets [Line Items]
Number Of Vessels			9		8	8
Time Charter and Bare-boat Expenses [Member]
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense	23,700		$ 48,800
Time Charter and Bare-boat Expenses [Member] | Lease Component [Member]
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense	16,400		33,700
Time Charter and Bare-boat Expenses [Member] | Non-lease [Member]
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense	$ 7,300		$ 15,100

Write-down and Loss on Sales _3

Write-down and Loss on Sales of Vessels (Detail) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)	Jun. 30, 2018USD ($)vessel	Jun. 30, 2019USD ($)vessel	Jun. 30, 2018USD ($)vessel
Long Lived Assets Held-for-sale [Line Items]
Write-down and loss on sales of vessels (note 7)	$ 0		$ (32,830)	$ (3,328)	$ (51,492)
Teekay Parent | FPSO contracts
Long Lived Assets Held-for-sale [Line Items]
Number Of Vessels Impaired | vessel				1
LNG Segment [Member] | Liquefied Gas Carriers
Long Lived Assets Held-for-sale [Line Items]
Number Of Vessels Impaired			4		4
LNG Segment [Member] | Handymax
Long Lived Assets Held-for-sale [Line Items]
Number Of Vessels Impaired | vessel					1
LNG Segment [Member] | Suezmax Tankers
Long Lived Assets Held-for-sale [Line Items]
Number Of Vessels Impaired | vessel					2
Other
Long Lived Assets Held-for-sale [Line Items]
Write-Down and Loss on Sales of Vessels	0		$ 170	$ 0	$ 170
Teekay LNG | Conventional Tankers | European Spirit [Member]
Long Lived Assets Held-for-sale [Line Items]
Proceeds from Sale of Property, Plant, and Equipment		$ 15,700
Teekay LNG | Conventional Tankers | Handymax
Long Lived Assets Held-for-sale [Line Items]
Asset Impairment Charges				0	13,000
Teekay LNG | Conventional Tankers | European Spirit and African Spirit
Long Lived Assets Held-for-sale [Line Items]
Asset Impairment Charges				0	5,662
Teekay LNG | Liquefied Gas Segment | LNG Carriers [Member]
Long Lived Assets Held-for-sale [Line Items]
Asset Impairment Charges				0	33,000
Teekay LNG | Conventional Tanker Segment [Member] | African Spirit [Member]
Long Lived Assets Held-for-sale [Line Items]
Proceeds from Sale of Property, Plant, and Equipment		$ 12,800
Liquefied Gas Carriers | LNG Segment [Member]
Long Lived Assets Held-for-sale [Line Items]
Asset Impairment Charges	$ 0		$ 33,000
Teekay Parent | FPSO contracts
Long Lived Assets Held-for-sale [Line Items]
Asset Impairment Charges				$ 3,328	$ 0

Accounts Payable, Accrued Lia_2

Accounts Payable, Accrued Liabilities and Other (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Schedule of Accounts Payable, Accrued Liabilities and Other [Line Items]
Accounts Payable	$ 117,408	$ 31,201
Voyage And Vessel Accrued Liabilities Current	113,748	98,135
Interest Payable, Current	31,582	47,731
Employee-related Liabilities, Current	31,623	34,849
Other Accrued Liabilities	6,486	6,426
Short-term Debt	15,000	0
Contract with Customer, Liability, Current	31,012	30,108
Liabilities of Business Transferred under Contractual Arrangement, Current	5,933	5,930
Operating Lease, Liability	3,230	0
Accounts payable, accrued liabilities and other (notes 8, 13 and 15)	$ 356,022	$ 254,380

Long-Term Debt - Summary of Lon

Long-Term Debt - Summary of Long-Term Debt (Detail) $ / shares in Units, € in Millions, shares in Millions	Jan. 31, 2018USD ($)	Jan. 27, 2010USD ($)	Nov. 30, 2015USD ($)	Jun. 30, 2019USD ($)subsidiaryvesselSecurityLoancredit_facilityterm_loan$ / sharesshares	Dec. 31, 2018USD ($)vessel	Jun. 30, 2019NOK (kr)vesselSecurityLoanterm_loanshares	Jun. 30, 2019EUR (€)vesselSecurityLoanterm_loanshares	May 31, 2019USD ($)	Dec. 31, 2018EUR (€)vessel	Jan. 26, 2018USD ($)$ / shares	May 31, 2015NOK (kr)
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate, at Point in Time				4.90%	5.10%	4.90%	4.90%		5.10%
Total principal				$ 2,891,199,000	$ 3,363,127,000
Less unamortized discount and debt issuance costs				(47,874,000)	(43,604,000)
Total debt				2,843,325,000	3,319,523,000
Less current portion				(540,440,000)	(242,137,000)
Long-term portion				2,302,885,000	3,077,386,000
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year				120,100,000
Long-term Debt, Maturities, Repayments of Principal in Year Two				703,800,000
Long-term Debt, Maturities, Repayments of Principal in Year Three				826,800,000
Long-term Debt, Maturities, Repayments of Principal in Year Four				373,100,000
Long-term Debt, Maturities, Repayments of Principal in Year Five				339,000,000
Long-term Debt, Maturities, Repayments of Principal after Year Five				$ 528,400,000
Number Of Loan Agreements | SecurityLoan				5		5	5
Secured Debt [Member]
Debt Instrument [Line Items]
Total principal				$ 1,400,000,000	$ 1,500,000,000
Number Of Debt Instruments | term_loan				10
Number Of Debt Instruments With Balloon Or Bullet Payments | term_loan				8		8	8
Number Of Vessels Held As Collateral | vessel				24	24	24	24		24
Senior Notes (8.5%) due January 15, 2020
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				100.00%
Percentage Of Par At Which Notes Sold		99.20%	99.01%
Long-term debt, percentage bearing fixed interest, percentage rate		8.50%	8.50%	8.50%		8.50%	8.50%
Total principal				$ 36,712,000	$ 508,577,000
Debt Instrument, Interest Rate, Effective Percentage				8.67%		8.67%	8.67%
Debt instrument, principal amount		$ 450,000,000	$ 200,000,000
Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Long-term debt, percentage bearing fixed interest, percentage rate				9.25%		9.25%	9.25%	9.25%
Total principal				$ 250,000,000	0
Debt instrument, principal amount								$ 250,000,000
Convertible Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Long-term debt, percentage bearing fixed interest, percentage rate				5.00%		5.00%	5.00%
Total principal				$ 125,000,000	125,000,000
Norwegian Krone-denominated Bonds due through August 2023
Debt Instrument [Line Items]
Total principal				357,454,000	352,973,000
U.S. Dollar-denominated Term Loans due through 2030
Debt Instrument [Line Items]
Total principal				1,437,688,000	1,536,499,000
Euro-denominated Term Loans due through 2024
Debt Instrument [Line Items]
Total principal				180,115,000	193,781,000
Other U.S. Dollar-denominated loan
Debt Instrument [Line Items]
Total principal				3,300,000	3,300,000
Revolving Credit Facilities
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity				886,779,169
Line of Credit Facility, Remaining Borrowing Capacity				$ 400,000,000
Number Of Credit Facilities | term_loan				5		5	5
Line Of Credit Reduction Of Available Borrowing Capacity In Year Four				$ 167,800,000
Total principal				500,930,000	642,997,000
Line Of Credit Reduction Of Available Borrowing Capacity Remainder Of Fiscal Year				17,400,000
Line Of Credit Reduction Of Available Borrowing Capacity In Year Two				372,400,000
Line Of Credit Reduction Of Available Borrowing Capacity In Year Three				$ 329,200,000
Debt Instrument, Collateral, Number of Vessels | vessel				36		36	36
Revolving Credit Facilities | Secured Debt [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity				$ 150,000,000
Remaining Term Loans [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				4.49%		4.49%	4.49%
Remaining Secured Debt [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Number Of Debt Instruments | credit_facility				2
Term Loan Two [Member]
Debt Instrument [Line Items]
Minimum Level Of Free Cash Maintained Per Loan Agreements				$ 50,000,000
Term Loan One [Member]
Debt Instrument [Line Items]
Minimum Level Of Free Cash Maintained Per Loan Agreements				$ 100,000,000
Convertible Senior Notes due 2023 [Member] | Convertible Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Convertible, Conversion Ratio	85.4701
Debt Instrument, Convertible, If-converted Value in Excess of Principal	$ 1,000
Debt Instrument, Convertible, Conversion Price | $ / shares										$ 11.70
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	20.00%
Sale of Stock, Price Per Share | $ / shares										9.75
Common Stock | Convertible Senior Notes due 2023 [Member] | Convertible Debt [Member]
Debt Instrument [Line Items]
Dividends payable, amount per share (in USD per share) | $ / shares										$ 0.055
Minimum [Member]
Debt Instrument [Line Items]
Vessel Market Value To Loan Ratio				135.00%		135.00%	135.00%
Vessel Market Value to Loan Required Ratio				115.00%		115.00%	115.00%
Undrawn Revolving Credit Facilities Time To Maturity				6 months
Minimum [Member] | Revolving Credit Facilities
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.40%
Minimum [Member] | Term Loan One [Member]
Debt Instrument [Line Items]
Free Liquidity And Undrawn Revolving Credit Line As Percentage Of Debt				7.50%		7.50%	7.50%
Maximum
Debt Instrument [Line Items]
Vessel Market Value To Loan Ratio				511.00%		511.00%	511.00%
Vessel Market Value to Loan Required Ratio				135.00%		135.00%	135.00%
Maximum | Revolving Credit Facilities
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				3.95%
Teekay LNG
Debt Instrument [Line Items]
Minimum Level Of Free Cash Maintained Per Loan Agreements				$ 35,000,000
Teekay LNG | Euro Denominated Term Loans Due Through Two Thousand Twenty Three [Member]
Debt Instrument [Line Items]
Total debt				$ 180,100,000	193,800,000		€ 158.4		€ 169
Number Of Debt Instruments | term_loan				2
Number Of Vessels Held As Collateral | vessel				2		2	2
Number of Subsidiaries | subsidiary				1
Teekay LNG | Common Class A [Member] | Revolving Credit Facilities
Debt Instrument [Line Items]
Common Unit, Issued | shares				25.2		25.2	25.2
Teekay LNG | Minimum [Member] | Euro Denominated Term Loans Due Through Two Thousand Twenty Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				0.60%
Teekay LNG | Maximum | Euro Denominated Term Loans Due Through Two Thousand Twenty Three [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				1.95%
Teekay Tankers [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Debt Guaranteed				$ 155,800,000
Teekay Tankers [Member] | 2016 Debt Facility Maturing in January 2021 [Member]
Debt Instrument [Line Items]
Debt Covenant Minimum Free Liquidity And Undrawn Revolving Credit Line				$ 35,000,000
Debt Covenant Minimum Free Liquidity And Undrawn Revolving Credit Line As Percentage Of Debt				5.00%		5.00%	5.00%
Teekay Tankers [Member] | Common Class A [Member] | Revolving Credit Facilities
Debt Instrument [Line Items]
Common Unit, Issued | shares				40.3		40.3	40.3
Teekay Tankers [Member] | Minimum [Member]
Debt Instrument [Line Items]
Free Liquidity And Undrawn Revolving Credit Line As Percentage Of Debt				5.00%		5.00%	5.00%
Teekay Tankers [Member] | Minimum [Member] | 2016 Debt Facility Maturing in January 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Term				6 months
Parent Company [Member] | Convertible Senior Notes due 2023 [Member] | Convertible Debt [Member]
Debt Instrument [Line Items]
Proceeds from Convertible Debt	$ 104,600,000
Debt instrument, principal amount										$ 125,000,000
Debt Instrument, Interest Rate, Stated Percentage										5.00%
Debt Instrument, Convertible Term	5 years
Debt Instrument, Convertible, Carrying Amount of Equity Component										$ 16,100,000
Parent Company [Member] | Common Stock
Debt Instrument [Line Items]
Sale of Stock, Price Per Share | $ / shares				$ 9.75
Nibor Loan [Member] | Teekay LNG | Norwegian Kroner Denominated Bonds Due Through October Two Thousand Twenty One [Member] [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount | kr											kr 3,050,000,000
Unsecured Debt | kr						kr 3,100,000,000
Senior Notes				$ 357,500,000	$ 353,000,000
Derivative, Notional Amount				$ 382,500,000
Nibor Loan [Member] | Teekay LNG | Minimum [Member] | Norwegian Kroner Denominated Bonds Due Through October Two Thousand Twenty One [Member] [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				3.70%
Derivative, Fixed Interest Rate				5.92%		5.92%	5.92%
Nibor Loan [Member] | Teekay LNG | Maximum | Norwegian Kroner Denominated Bonds Due Through October Two Thousand Twenty One [Member] [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				6.00%
Derivative, Fixed Interest Rate				7.89%		7.89%	7.89%
Fixed Rate [Member] | Remaining Term Loans [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Number Of Debt Instruments | term_loan				2
Three Month London Interbank Offered Rate [Member] | Minimum [Member] | Remaining Term Loans [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				0.30%	0.30%
Three Month London Interbank Offered Rate [Member] | Maximum | Remaining Term Loans [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate				3.25%	3.50%
Debt Instrument, Redemption, Period One [Member] | Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				100.00%
Debt Instrument, Redemption, Period Two [Member] | Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				104.625%
Debt Instrument, Redemption, Period Three [Member] | Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				102.313%
Debt Instrument, Redemption, Period Four [Member] | Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Redemption Price, Percentage				100.00%

Long-Term Debt Narrative (Detai

Long-Term Debt Narrative (Details) $ / shares in Units, € in Millions, shares in Millions	Jan. 31, 2018USD ($)	Jan. 27, 2010USD ($)	May 31, 2019USD ($)vessel	Nov. 30, 2015USD ($)	Jun. 30, 2019USD ($)vesselSecurityLoanterm_loan$ / sharesshares	Mar. 31, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)subsidiaryvesselSecurityLoancredit_facilityterm_loan$ / sharesshares	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)vessel	Dec. 31, 2014USD ($)	Jun. 30, 2019NOK (kr)vesselSecurityLoanterm_loanshares	Jun. 30, 2019EUR (€)vesselSecurityLoanterm_loanshares	Dec. 31, 2018EUR (€)vessel	Mar. 31, 2018USD ($)	Jan. 26, 2018USD ($)$ / shares	May 31, 2015NOK (kr)
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal after Year Five					$ 528,400,000			$ 528,400,000
Gain (Loss) on Extinguishment of Debt					(10,700,000)
Repayments of Senior Debt						$ 10,900,000
Long-term debt, gross					2,891,199,000			2,891,199,000		$ 3,363,127,000
Long-term Debt					2,843,325,000			2,843,325,000		$ 3,319,523,000
Foreign exchange (loss) gain (notes 9 and 15)					$ (5,851,000)		$ 12,529,000	$ (8,481,000)	$ 12,551,000
Long-term Debt, Weighted Average Interest Rate, at Point in Time					4.90%			4.90%		5.10%		4.90%	4.90%	5.10%
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year					$ 120,100,000			$ 120,100,000
Long-term Debt, Maturities, Repayments of Principal in Year Two					703,800,000			703,800,000
Long-term Debt, Maturities, Repayments of Principal in Year Three					826,800,000			826,800,000
Long-term Debt, Maturities, Repayments of Principal in Year Four					373,100,000			373,100,000
Long-term Debt, Maturities, Repayments of Principal in Year Five					$ 339,000,000			$ 339,000,000
Number Of Loan Agreements | SecurityLoan					5			5				5	5
Minimum [Member]
Debt Instrument [Line Items]
Vessel Market Value To Loan Ratio					135.00%			135.00%				135.00%	135.00%
Vessel Market Value to Loan Required Ratio					115.00%			115.00%				115.00%	115.00%
Undrawn Revolving Credit Facilities Time To Maturity								6 months
Maximum
Debt Instrument [Line Items]
Vessel Market Value To Loan Ratio					511.00%			511.00%				511.00%	511.00%
Vessel Market Value to Loan Required Ratio					135.00%			135.00%				135.00%	135.00%
Term Loan One [Member]
Debt Instrument [Line Items]
Minimum Level Of Free Cash Maintained Per Loan Agreements					$ 100,000,000			$ 100,000,000
Term Loan One [Member] | Minimum [Member]
Debt Instrument [Line Items]
Free Liquidity And Undrawn Revolving Credit Line As Percentage Of Debt					7.50%			7.50%				7.50%	7.50%
Term Loan Two [Member]
Debt Instrument [Line Items]
Minimum Level Of Free Cash Maintained Per Loan Agreements					$ 50,000,000			$ 50,000,000
Secured Debt [Member]
Debt Instrument [Line Items]
Number Of Debt Instruments | term_loan								10
Long-term debt, gross					$ 1,400,000,000			$ 1,400,000,000		$ 1,500,000,000
Number Of Debt Instruments With Balloon Or Bullet Payments | term_loan					8			8				8	8
Number Of Vessels Held As Collateral | vessel					24			24		24		24	24	24
Secured Debt [Member] | Remaining Term Loans [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					4.49%			4.49%				4.49%	4.49%
Secured Debt [Member] | Remaining Term Loans [Member] | Fixed Rate [Member]
Debt Instrument [Line Items]
Number Of Debt Instruments | term_loan								2
Secured Debt [Member] | Remaining Term Loans [Member] | Three Month London Interbank Offered Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate								0.30%		0.30%
Secured Debt [Member] | Remaining Term Loans [Member] | Three Month London Interbank Offered Rate [Member] | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate								3.25%		3.50%
Secured Debt [Member] | Remaining Secured Debt [Member]
Debt Instrument [Line Items]
Number Of Debt Instruments | credit_facility								2
Senior Notes (8.5%) due January 15, 2020
Debt Instrument [Line Items]
Long-term debt, percentage bearing fixed interest, percentage rate		8.50%		8.50%	8.50%			8.50%				8.50%	8.50%
Debt instrument, principal amount		$ 450,000,000		$ 200,000,000
Percentage Of Par At Which Notes Sold		99.20%		99.01%
Debt Instrument, Interest Rate, Effective Percentage					8.67%			8.67%				8.67%	8.67%
Repayments of Senior Debt			$ 460,900,000							$ 84,100,000	$ 57,300,000
Debt Instrument, Redemption Price, Percentage								100.00%
Long-term debt, gross					$ 36,712,000			$ 36,712,000		508,577,000
Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Long-term debt, percentage bearing fixed interest, percentage rate			9.25%		9.25%			9.25%				9.25%	9.25%
Debt instrument, principal amount			$ 250,000,000
Long-term debt, gross					$ 250,000,000			$ 250,000,000		0
Convertible Debt [Member] | Convertible Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Debt Instrument, Convertible, Conversion Ratio	85.4701
Debt Instrument, Convertible, If-converted Value in Excess of Principal	$ 1,000
Debt Instrument, Convertible, Conversion Price | $ / shares																$ 11.70
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger	20.00%
Sale of Stock, Price Per Share | $ / shares																9.75
Revolving Credit Facilities
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity					886,779,169			886,779,169
Line of Credit Facility, Remaining Borrowing Capacity					400,000,000			400,000,000
Line Of Credit Reduction Of Available Borrowing Capacity Remainder Of Fiscal Year					17,400,000			17,400,000
Line Of Credit Reduction Of Available Borrowing Capacity In Year Two					372,400,000			372,400,000
Line Of Credit Reduction Of Available Borrowing Capacity In Year Three					329,200,000			329,200,000
Line Of Credit Reduction Of Available Borrowing Capacity In Year Four					$ 167,800,000			$ 167,800,000
Debt Instrument, Collateral, Number of Vessels | vessel					36			36				36	36
Long-term debt, gross					$ 500,930,000			$ 500,930,000		642,997,000
Number Of Credit Facilities | term_loan					5			5				5	5
Revolving Credit Facilities | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate								1.40%
Revolving Credit Facilities | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate								3.95%
Revolving Credit Facilities | Secured Debt [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity					$ 150,000,000			$ 150,000,000
Teekay Offshore [Member] | Revolving Credit Facilities
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity															$ 125,000,000
Teekay LNG
Debt Instrument [Line Items]
Minimum Level Of Free Cash Maintained Per Loan Agreements					35,000,000			35,000,000
Teekay LNG | Norwegian Kroner Denominated Bonds Due Through October Two Thousand Twenty One [Member] [Member] | Nibor Loan [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount | kr																	kr 3,050,000,000
Unsecured Debt | kr												kr 3,100,000,000
Senior Notes					357,500,000			357,500,000		353,000,000
Notional Amount					$ 382,500,000			$ 382,500,000
Teekay LNG | Norwegian Kroner Denominated Bonds Due Through October Two Thousand Twenty One [Member] [Member] | Nibor Loan [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate								3.70%
Derivative, Fixed Interest Rate					5.92%			5.92%				5.92%	5.92%
Teekay LNG | Norwegian Kroner Denominated Bonds Due Through October Two Thousand Twenty One [Member] [Member] | Nibor Loan [Member] | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate								6.00%
Derivative, Fixed Interest Rate					7.89%			7.89%				7.89%	7.89%
Teekay LNG | Euro Denominated Term Loans Due Through Two Thousand Twenty Three [Member]
Debt Instrument [Line Items]
Number Of Debt Instruments | term_loan								2
Number Of Vessels Held As Collateral | vessel					2			2				2	2
Long-term Debt					$ 180,100,000			$ 180,100,000		$ 193,800,000			€ 158.4	€ 169
Number of Subsidiaries | subsidiary								1
Teekay LNG | Euro Denominated Term Loans Due Through Two Thousand Twenty Three [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate								0.60%
Teekay LNG | Euro Denominated Term Loans Due Through Two Thousand Twenty Three [Member] | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate								1.95%
Teekay Tankers [Member]
Debt Instrument [Line Items]
Number Of Vessels | vessel										6
Teekay Tankers [Member] | Minimum [Member]
Debt Instrument [Line Items]
Free Liquidity And Undrawn Revolving Credit Line As Percentage Of Debt					5.00%			5.00%				5.00%	5.00%
Teekay Tankers [Member] | 2016 Debt Facility Maturing in January 2021 [Member]
Debt Instrument [Line Items]
Debt Covenant Minimum Free Liquidity And Undrawn Revolving Credit Line					$ 35,000,000			$ 35,000,000
Debt Covenant Minimum Free Liquidity And Undrawn Revolving Credit Line As Percentage Of Debt					5.00%			5.00%				5.00%	5.00%
Teekay Tankers [Member] | 2016 Debt Facility Maturing in January 2021 [Member] | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Term								6 months
Teekay Tankers [Member] | Long-term Debt [Member]
Debt Instrument [Line Items]
Debt Guaranteed					$ 155,800,000			$ 155,800,000
Common Class A [Member] | Teekay LNG | Revolving Credit Facilities
Debt Instrument [Line Items]
Common Unit, Issued | shares					25.2			25.2				25.2	25.2
Common Class A [Member] | Teekay Tankers [Member] | Revolving Credit Facilities
Debt Instrument [Line Items]
Common Unit, Issued | shares					40.3			40.3				40.3	40.3
Common Stock | Convertible Debt [Member] | Convertible Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Dividends payable, amount per share (in USD per share) | $ / shares																$ 0.055
Parent Company [Member] | Convertible Debt [Member] | Convertible Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount																$ 125,000,000
Debt Instrument, Interest Rate, Stated Percentage																5.00%
Proceeds from Convertible Debt	$ 104,600,000
Debt Instrument, Convertible Term	5 years
Debt Instrument, Convertible, Carrying Amount of Equity Component																$ 16,100,000
Parent Company [Member] | Teekay Offshore [Member] | Revolving Credit Facilities
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity															$ 25,000,000
Parent Company [Member] | Common Stock
Debt Instrument [Line Items]
Sale of Stock, Price Per Share | $ / shares					$ 9.75			$ 9.75
FPSO contracts
Debt Instrument [Line Items]
Number Of Vessels | vessel			2
FPSO contracts | Asset Pledged as Collateral [Member]
Debt Instrument [Line Items]
Number Of Vessels | vessel			3

Capital Stock - Capital Stock (

Capital Stock - Capital Stock (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	6 Months Ended
	Apr. 30, 2019	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Class of Stock [Line Items]
Preferred stock, share authorized (in shares)		25,000,000		25,000,000
Preferred stock, par value (in usd per share)		$ 1		$ 1
Common stock, share authorized (in shares)		725,000,000		725,000,000
Common stock, par value (in usd per share)		$ 0.001		$ 0.001
Preferred stock, share issued (in shares)		0
Stock options granted (in shares)		2,646,903	1,048,916
Stock option per share value (in usd per share)		$ 3.98	$ 8.67
Restricted stock units
Class of Stock [Line Items]
Number of shares or units granted equity based compensation awards (in shares)		796,733	625,878
Fair value of granted stock		$ 3.3	$ 5.4
Vesting period		3 years
Restricted stock awards
Class of Stock [Line Items]
Number of shares or units granted equity based compensation awards (in shares)		144,441	79,869
Fair value of granted stock		$ 0.5	$ 0.7
Stock option
Class of Stock [Line Items]
Period Of Historical Data Used To Calculate Expected Volatility In Year		5 years
Stock option, term		10 years
Vesting period		3 years
Weighted-average grant-date fair value of options granted (in usd per share)		$ 1.47
Expected volatility used in computing fair value of options granted		65.20%
Expected life used in computing fair value of options granted, years		5 years 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate		5.90%
Risk-free interest rate used in computing fair value of options granted		2.50%
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Estimated Forfeiture Rate		6.00%
Parent Company [Member] | Common Stock
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		10,000,000
Sale of Stock, Price Per Share		$ 9.75
Net proceeds from equity issuances of subsidiaries		$ 93
Continuous Offering Program [Member]
Class of Stock [Line Items]
Sale of Stock, Offering Amount	$ 63
Continuous Offering Program [Member] | Parent Company [Member]
Class of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		1,100,000
Sale of stock, consideration received per transaction		$ 10.7

Capital Stock - Share-based Com

Capital Stock - Share-based Compensation of Subsidiaries (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	6 Months Ended
	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)		2,646,903	1,048,916
Stock option per share value (in usd per share)		$ 3.98	$ 8.67
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares or units granted equity based compensation awards (in shares)		796,733	625,878
Vesting period		3 years
Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Teekay LNG | Phantom unit awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares or units granted equity based compensation awards (in shares)		80,100	62,283
Teekay LNG | Non-management directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares or units issued related to the exercise of share based compensation during the period (in shares)		35,419	17,498
Teekay Tankers [Member] | Restricted stock units | Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares or units granted equity based compensation awards (in shares)		633,134	762,640
Teekay Tankers [Member] | Non-management directors | Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares or units issued related to the exercise of share based compensation during the period (in shares)		159,375	168,029
Teekay Tankers [Member] | Non-management directors | Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)	504,097		470,765
Teekay Tankers [Member] | Officer | Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Stock options granted (in shares)	736,327	1,380,173
Stock option per share value (in usd per share)	$ 1.22		$ 1
Maximum contractual term	10 years
Teekay LNG and Teekay Tankers [Member] | Restricted Stock And Phantom Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common units aggregate value, granted		$ 1.8	$ 2.1
Teekay LNG and Teekay Tankers [Member] | Non-management directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common units aggregate value, granted		$ 0.7	$ 0.5
Teekay Offshore Teekay Lng And Teekay Tankers | Restricted Stock And Phantom Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years

Vessels Under Construction (Det

Vessels Under Construction (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Long-term Purchase Commitment [Line Items]
Loss Contingency, Receivable, Proceeds	$ 45,000	$ 0
Payments made towards commitments for construction of certain carriers and tankers	0		$ 86,942
Teekay LNG
Long-term Purchase Commitment [Line Items]
Loss Contingency, Receivable, Proceeds	45,000
Expected cost of project	410,267
Estimated remaining payments required to be made under newbuilding contract remainder of 2018	359,665
Estimated remaining payments required to be made under newbuilding contract in 2019	9,733
Unrecorded Unconditional Purchase Obligation, Due within Three Years	27,191
Unrecorded Unconditional Purchase Obligation, Due within Four Years	13,678
Teekay LNG | Consolidated Entities [Member]
Long-term Purchase Commitment [Line Items]
Expected cost of project	60,586
Estimated remaining payments required to be made under newbuilding contract remainder of 2018	9,984
Estimated remaining payments required to be made under newbuilding contract in 2019	9,733
Unrecorded Unconditional Purchase Obligation, Due within Three Years	27,191
Unrecorded Unconditional Purchase Obligation, Due within Four Years	13,678
Teekay LNG | Equity Method Investments [Member]
Long-term Purchase Commitment [Line Items]
Expected cost of project	349,681
Purchase Commitment, Remaining Minimum Amount Committed	349,681
Estimated remaining payments required to be made under newbuilding contract in 2019	0
Unrecorded Unconditional Purchase Obligation, Due within Three Years	0
Unrecorded Unconditional Purchase Obligation, Due within Four Years	$ 0

Equity-Accounted Investments (D

Equity-Accounted Investments (Detail) $ in Millions	Jun. 30, 2019USD ($)
Equity Method Investments [Member] | Teekay LNG | Newbuildings | Supply Commitment
Long-term Purchase Commitment [Line Items]
Credit facility, maximum borrowing capacity	$ 301

Liquidity (Details)

Liquidity (Details)	May 08, 2019USD ($)	May 31, 2019USD ($)vessel	Apr. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Jun. 30, 2018USD ($)	Mar. 31, 2018USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2014USD ($)	Nov. 30, 2015USD ($)	Jan. 27, 2010USD ($)
Debt Instrument [Line Items]
Gain (Loss) on Extinguishment of Debt				$ (10,700,000)
Net loss				34,111,000	$ 61,464,000	$ 39,647,000	$ 9,980,000	$ 95,575,000	$ 49,627,000
Net operating cash flow								178,924,000	110,434,000
Working capital deficit				365,900,000				365,900,000
Current portion of long-term debt				540,440,000				540,440,000		$ 242,137,000
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest	49.00%
Current portion of loans to equity-accounted investments (note 4)				$ 93,924,000				93,924,000		169,197,000
Proceeds from sale of equity-accounted investments and related assets (note 4)								$ 100,000,000	$ 54,438,000
Repayments of Senior Debt					$ 10,900,000
Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Debt instrument, principal amount		$ 250,000,000
Senior Notes (8.5%) due January 15, 2020
Debt Instrument [Line Items]
Debt instrument, principal amount												$ 200,000,000	$ 450,000,000
Repayments of Senior Debt		460,900,000								$ 84,100,000	$ 57,300,000
Teekay Offshore [Member]
Debt Instrument [Line Items]
Current portion of loans to equity-accounted investments (note 4)	$ 25,000,000
Proceeds from sale of equity-accounted investments and related assets (note 4)	100,000,000	$ 100,000,000
Gain (Loss) on Sale of Equity Investments	$ 8,900,000
FSO | Asset Pledged as Collateral [Member]
Debt Instrument [Line Items]
Number Of Vessels | vessel		2
FPSO contracts
Debt Instrument [Line Items]
Number Of Vessels | vessel		2
FPSO contracts | Asset Pledged as Collateral [Member]
Debt Instrument [Line Items]
Number Of Vessels | vessel		3
Continuous Offering Program [Member]
Debt Instrument [Line Items]
Sale of Stock, Offering Amount			$ 63,000,000

Financial Instruments Fair Valu

Financial Instruments Fair Value of Financial Instruments and Other Non-Financial Assets (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	May 08, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Mar. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Assets Held-for-sale, Not Part of Disposal Group, Current	$ 12,300		$ 12,300				$ 0
Cash, cash equivalents, restricted cash and restricted cash equivalents	322,883	$ 545,026	322,883	$ 545,026			505,639		$ 552,174
Interest rate swap agreements – liabilities	(56,172)		(56,172)				(56,352)
Cross currency interest swap agreements – liabilities	(101)		(101)
Derivative Liability, Current	28,481		28,481				12,205
Other
Loans to equity-accounted investees and joint venture partners - Current	93,924		93,924				169,197
Short-term Debt	15,000		15,000				0
Long-term debt	(2,843,325)		(2,843,325)				(3,319,523)
Obligations related to finance leases, including current portion (note 6)	(1,826,732)		(1,826,732)				(1,673,845)
Accrued liabilities, fair value disclosure	2,600		2,600				3,200
Recurring | Level 3 | Stock purchase warrants
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss)	24,584	6,206	26,900	4,522
Unrealized gain included in earnings	(25,559)	0	(25,559)	0
Stock purchase warrants	0	$ 35,271	0	$ 35,271		$ 14,342	12,026	$ 29,065	$ 30,749
Carrying Amount Asset (Liability)
Other
Loans to equity-accounted investees and joint venture partners - Current	93,924		93,924				169,197
Line of Credit, Amount Extended	62,196		62,196				62,207
Carrying Amount Asset (Liability) | Level 1 | Public
Other
Long-term debt	(627,981)		(627,981)				(856,986)
Carrying Amount Asset (Liability) | Level 2 | Public
Other
Short-term Debt	15,000		15,000				0
Carrying Amount Asset (Liability) | Level 2 | Non-public
Other
Long-term debt	(2,215,344)		(2,215,344)				(2,462,537)
Obligations related to finance leases, including current portion (note 6)	(1,826,732)		(1,826,732)				(1,673,845)
Carrying Amount Asset (Liability) | Recurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash, cash equivalents, restricted cash and restricted cash equivalents	322,883		322,883				505,639
Carrying Amount Asset (Liability) | Recurring | Level 2 | Interest rate swap agreements
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap agreements – assets	1,896		1,896				9,640
Interest rate swap agreements – liabilities	(56,663)		(56,663)				(43,175)
Carrying Amount Asset (Liability) | Recurring | Level 2 | Cross currency interest swap agreement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cross currency interest swap agreements – liabilities	(31,006)		(31,006)				(29,122)
Carrying Amount Asset (Liability) | Recurring | Level 2 | Foreign currency contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cross currency interest swap agreement and Foreign currency contracts	(101)		(101)				0
Carrying Amount Asset (Liability) | Recurring | Level 2 | Freight forward agreements
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset, Current	61		61
Derivative Liability, Current							(57)
Carrying Amount Asset (Liability) | Recurring | Level 3 | Stock purchase warrants
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stock purchase warrants	0		0				12,026
Fair Value Asset (Liability) | Level 1 | Public
Other
Long-term debt	(658,046)		(658,046)				(851,470)
Fair Value Asset (Liability) | Level 2 | Public
Other
Short-term Debt, Fair Value	15,000		15,000				0
Fair Value Asset (Liability) | Level 2 | Non-public
Other
Long-term debt	(2,168,252)		(2,168,252)				(2,395,300)
Obligations related to finance leases, including current portion (note 6)	(1,872,238)		(1,872,238)				(1,652,345)
Fair Value Asset (Liability) | Recurring | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash, cash equivalents, restricted cash and restricted cash equivalents	322,883		322,883				505,639
Fair Value Asset (Liability) | Recurring | Level 2 | Interest rate swap agreements
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Interest rate swap agreements – assets	1,896		1,896				9,640
Interest rate swap agreements – liabilities	(56,663)		(56,663)				(43,175)
Fair Value Asset (Liability) | Recurring | Level 2 | Cross currency interest swap agreement
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cross currency interest swap agreements – liabilities	(31,006)		(31,006)				(29,122)
Fair Value Asset (Liability) | Recurring | Level 2 | Foreign currency contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cross currency interest swap agreement and Foreign currency contracts	(101)		(101)				0
Fair Value Asset (Liability) | Recurring | Level 2 | Freight forward agreements
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset, Current	61		61
Derivative Liability, Current							(57)
Fair Value Asset (Liability) | Recurring | Level 3 | Stock purchase warrants
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stock purchase warrants	$ 0		$ 0				$ 12,026
Measurement Input, Discount Rate | Royal Dutch Shell Plc [Member] | Supply Commitment
Other
Receivable measurement input							0.080
Teekay Offshore [Member]
Other
Loans to equity-accounted investees and joint venture partners - Current					$ 25,000
Line of Credit, Amount Extended					$ 25,000

Financial Instruments Narrative

Financial Instruments Narrative (Detail) - $ / shares	May 08, 2019	Jun. 30, 2019	Dec. 31, 2018
Derivative [Line Items]
Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest	49.00%
Common stock, par value (in usd per share)		$ 0.001	$ 0.001
Teekay Offshore [Member] | Stock purchase warrants | Brookfield Business Partners L.P. [Member]
Derivative [Line Items]
Number of shares available through exercise of stock purchase warrant (in shares)	15,500,000
Teekay Offshore [Member] | Series D Warrant
Derivative [Line Items]
Number of shares available through exercise of stock purchase warrant (in shares)	1,755,000

Financial Instruments Warrants

Financial Instruments Warrants change in Fair Value (Detail) - USD ($) $ in Thousands, shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	May 08, 2019	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Level 3 | Recurring | Stock purchase warrants
Derivative [Line Items]
Stock purchase warrants	$ 0	$ 35,271	$ 0	$ 35,271		$ 14,342	$ 12,026	$ 29,065	$ 30,749
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Unrealized gain included in earnings	(25,559)	0	(25,559)	0
Teekay Offshore [Member] | Stock purchase warrants | Brookfield Business Partners L.P. [Member]
Derivative [Line Items]
Number of shares available through exercise of stock purchase warrant (in shares)					15.5
Stock purchase warrants | Level 3 | Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Sales	$ (13,367)	$ 0	$ (13,367)	$ 0

Financial Instruments Financing

Financial Instruments Financing Receivables (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Direct Financing Lease, Net Investment in Lease	$ 564,685	$ 575,163
Other loan receivables
Total direct financing leases and other loan receivables	727,662	822,261
Performing | Payment activity
Financing Receivable, Credit Quality Indicator [Line Items]
Direct Financing Lease, Net Investment in Lease	564,685	575,163
Other loan receivables
Long-term receivable and accrued revenue included in accounts receivable and other assets	6,857	15,694
Performing | Other internal metrics
Other loan receivables
Loans to equity-accounted investments and joint venture partners	$ 156,120	$ 231,404

Restructuring Reversals (Char_2

Restructuring Reversals (Charges) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Restructuring and Related Activities [Abstract]
Restructuring charges	$ 1,369	$ 1,114	$ 9,990	$ 3,252
Restructuring liability	$ 1,300		$ 1,300		$ 800

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Loss	$ 2,672,625	$ 2,756,090	$ 2,867,028	$ 2,933,613	$ 2,984,111	$ 2,879,656
Accumulated other comprehensive loss	(21,143)		(2,273)
Unrealized (loss) gain on qualifying cash flow hedging instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(17,801)		903
Pension adjustments, net of tax recoveries
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax	(3,342)		(3,176)
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ (21,143)	$ (11,124)	$ (2,273)	$ 5,163	$ 2,438	$ (5,995)

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Commitment of Cross Currency Swaps (Detail) - Cross Currency Interest Rate Contract [Member] kr in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2019NOK (kr)
Derivative [Line Items]
Fair Value / Carrying Amount of Asset / (Liability)	$ (31,006)
NIBOR | Six Point Zero Margin [Member]
Derivative [Line Items]
Notional Amount	$ 146,500	kr 1,200,000
Receivable Margin	6.00%	6.00%
Derivative, Fixed Interest Rate	7.72%	7.72%
Fair Value / Carrying Amount of Asset / (Liability)	$ (5,785)
Remaining Term (years)	2 years 3 months 18 days
NIBOR | 4.60%
Derivative [Line Items]
Notional Amount	$ 102,000	kr 850,000
Receivable Margin	4.60%	4.60%
Derivative, Fixed Interest Rate	7.89%	7.89%
Fair Value / Carrying Amount of Asset / (Liability)	$ (8,088)
Remaining Term (years)	4 years 2 months 12 days
NIBOR | Three Point Seven Zero Margin [Member]
Derivative [Line Items]
Notional Amount	$ 134,000	kr 1,000,000
Receivable Margin	3.70%	3.70%
Derivative, Fixed Interest Rate	5.92%	5.92%
Fair Value / Carrying Amount of Asset / (Liability)	$ (17,133)
Remaining Term (years)	10 months 24 days

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities - Interest Rate Swap Agreements (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)interest_rate_swaps
U.S. Dollar-denominated interest rate swaps | LIBOR
Derivative [Line Items]
Principal Amount	$ 1,011,178
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	$ (44,855)
Weighted-Average Remaining Term (Years)	3 years 7 months 6 days
Derivative, Fixed Interest Rate	3.00%
Euro-denominated interest rate swaps | EURIBOR
Derivative [Line Items]
Principal Amount	$ 81,059
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	$ (9,912)
Weighted-Average Remaining Term (Years)	4 years 2 months 1 day
Derivative, Fixed Interest Rate	3.80%
Interest rate swap agreements
Derivative [Line Items]
Interest Rate Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net	$ (54,767)
Derivative, Number of Instruments Held | interest_rate_swaps	2
Minimum [Member] | Interest rate swap agreements
Derivative [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.30%
Maximum | Interest rate swap agreements
Derivative [Line Items]
Debt Instrument, Basis Spread on Variable Rate	3.95%

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities - Location and Fair Value Amounts of Derivative Instruments (Detail) $ in Thousands	Jun. 30, 2019USD ($)€ / $	May 08, 2019shares	Dec. 31, 2018USD ($)
Derivatives, Fair Value [Line Items]
Expected maturity amounts of foreign currency derivatives in year two	$ 6,750
Investment Foreign Currency, Contract, Foreign Currency Amount	9,240
Prepaid Expenses and Other	$ 108,274		$ 69,882
Derivative, Average Forward Exchange Rate | € / $	1
Foreign Currency Contracts, Liability, Fair Value Disclosure	$ 101
Expected maturity amount of foreign currency derivatives in next fiscal year	3,952
Interest Rate Swaps, Cross Currency Swaps Agreement and Foreign Currency Forward Contracts [Member]
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, gross asset	1,900
Derivative liability, fair value, gross liability	66,200
Derivatives not designated as a cash flow hedge | Forward freight agreements
Derivatives, Fair Value [Line Items]
Prepaid Expenses and Other			0
Other Non-Current Assets			0
Accounts Payable, Accrued Liabilities and Other			0
Current Portion of Derivative Liabilities			(57)
Derivative Liabilities			0
Derivative
Derivatives, Fair Value [Line Items]
Prepaid Expenses and Other	1,229		3,699
Other Non-Current Assets	240		17,361
Accounts Payable, Accrued Liabilities and Other	(2,629)		(3,191)
Current Portion of Derivative Liabilities	(28,481)		(12,205)
Derivative Liabilities	(56,172)		(56,352)
Derivative | Derivatives designated as a cash flow hedge | Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Prepaid Expenses and Other	0		784
Other Non-Current Assets	0		2,362
Accounts Payable, Accrued Liabilities and Other	(3)		(20)
Current Portion of Derivative Liabilities	(497)		0
Derivative Liabilities	(3,758)		0
Derivative | Derivatives not designated as a cash flow hedge | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Prepaid Expenses and Other	0
Other Non-Current Assets	0
Accounts Payable, Accrued Liabilities and Other	0
Current Portion of Derivative Liabilities	(101)
Derivative Liabilities	0
Derivative | Derivatives not designated as a cash flow hedge | Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Prepaid Expenses and Other	1,168		2,915
Other Non-Current Assets	240		2,973
Accounts Payable, Accrued Liabilities and Other	(2,094)		(2,498)
Current Portion of Derivative Liabilities	(8,996)		(7,419)
Derivative Liabilities	(40,833)		(32,672)
Derivative | Derivatives not designated as a cash flow hedge | Cross Currency Swap Agreements
Derivatives, Fair Value [Line Items]
Prepaid Expenses and Other	0		0
Other Non-Current Assets	0		0
Accounts Payable, Accrued Liabilities and Other	(538)		(713)
Current Portion of Derivative Liabilities	(18,887)		(4,729)
Derivative Liabilities	(11,581)		(23,680)
Derivative | Derivatives not designated as a cash flow hedge | Stock Purchase Warrants
Derivatives, Fair Value [Line Items]
Prepaid Expenses and Other			0
Other Non-Current Assets			12,026
Accounts Payable, Accrued Liabilities and Other			0
Current Portion of Derivative Liabilities			0
Derivative Liabilities			$ 0
Derivative | Derivatives not designated as a cash flow hedge | Forward freight agreements
Derivatives, Fair Value [Line Items]
Prepaid Expenses and Other	61
Other Non-Current Assets	0
Accounts Payable, Accrued Liabilities and Other	0
Current Portion of Derivative Liabilities	0
Derivative Liabilities
Series D Warrant | Teekay Offshore [Member]
Derivatives, Fair Value [Line Items]
Number of securities called by warrants or rights (in shares) | shares		1,755,000
Brookfield Business Partners L.P. [Member] | Stock Purchase Warrants | Teekay Offshore [Member]
Derivatives, Fair Value [Line Items]
Number of securities called by warrants or rights (in shares) | shares		15,500,000

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities - Effective Portion of Gains (Losses) on Interest Rate Swap Agreements (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative [Line Items]
Unrealized (loss) gain on qualifying cash flow hedging instruments	$ (30,743)	$ 7,054	$ (52,252)	$ 9,676
Interest Expense
Derivative [Line Items]
Unrealized (loss) gain on qualifying cash flow hedging instruments				5,090
Effective Portion Recognized in AOCI	(4,570)	1,534	(7,402)
Effective Portion Reclassified from AOCI	$ 157	2	$ 408	248
Ineffective Portion		$ 0		$ 740

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities - Effect of Gain (Loss) on Derivatives Not Designated as Hedging Instruments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Prepaid Expenses and Other	$ 108,274		$ 108,274		$ 69,882
Realized losses relating to
Derivative instruments not designated as hedging instruments realized (loss) gain net	(27,373)	$ (4,049)	(29,074)	$ (8,858)
Unrealized gains (losses) relating to
Derivative instruments not designated as hedging instruments unrealized gain (loss) net	16,409	14,772	12,687	29,007
Total realized and unrealized gains (losses) on derivative instruments	(10,964)	10,723	(16,387)	20,149
Interest rate swap agreements
Realized losses relating to
Derivative instruments not designated as hedging instruments realized (loss) gain net	(1,785)	(4,031)	(3,473)	(8,840)
Unrealized gains (losses) relating to
Derivative instruments not designated as hedging instruments unrealized gain (loss) net	(8,195)	8,532	(14,216)	24,451
Foreign currency forward contracts
Unrealized gains (losses) relating to
Derivative instruments not designated as hedging instruments unrealized gain (loss) net	(101)	0	(101)	0
Stock purchase warrants
Realized losses relating to
Derivative instruments not designated as hedging instruments realized (loss) gain net	(25,559)	0	(25,559)	0
Unrealized gains (losses) relating to
Derivative instruments not designated as hedging instruments unrealized gain (loss) net	24,584	6,206	26,900	4,522
Forward freight agreements
Realized losses relating to
Derivative instruments not designated as hedging instruments realized (loss) gain net	(29)	(18)	(42)	(18)
Unrealized gains (losses) relating to
Derivative instruments not designated as hedging instruments unrealized gain (loss) net	$ 121	$ 34	$ 104	$ 34

Derivative Instruments and He_8

Derivative Instruments and Hedging Activities - Effect of Gains (Losses) on Cross Currency Swaps (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Total realized and unrealized gains (losses) on derivative instruments	$ (10,964)	$ 10,723	$ (16,387)	$ 20,149
Cross Currency Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized losses	(1,087)	(1,798)	(2,521)	(3,182)
Unrealized (losses) gains	(140)	(16,566)	(2,060)	5,768
Total realized and unrealized gains (losses) on derivative instruments	$ (1,227)	$ (18,364)	$ (4,581)	$ 2,586

Derivative Instruments and He_9

Derivative Instruments and Hedging Activities Derivatives and Hedging Activities - FX Forwards (Details) $ in Thousands	Jun. 30, 2019USD ($)€ / $
Derivative [Line Items]
Investment Foreign Currency, Contract, Foreign Currency Amount	$ 9,240
Derivative, Average Forward Exchange Rate | € / $	1
Expected maturity amounts of foreign currency derivatives in year two	$ 6,750

Income Tax Expense (Recovery)

Income Tax Expense (Recovery) - Components of Provision for Income Tax (Expense) Recovery (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Current	$ (3,219)	$ (8,410)	$ (8,072)	$ (11,221)
Deferred	(185)	(336)	(368)	(1,642)
Income tax expense	$ (3,404)	$ (8,746)	$ (8,440)	$ (12,863)

Income Tax Expense (Recovery)_2

Income Tax Expense (Recovery) - Unrecognized Tax Benefits, Recorded in Other Long-Term Liabilities (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	$ 2,106	$ 2,047
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	40,556	31,061
Increases for positions related to the current year	4,121	2,337
Decrease related to statute of limitations	0	(312)
Ending balance	$ 46,783	$ 35,133

Net Loss Per Share - Schedule o

Net Loss Per Share - Schedule of Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net loss attributable to the shareholders of Teekay Corporation – basic and diluted	$ (39,485)	$ (28,324)	$ (123,742)	$ (48,879)
Basic and Diluted (in shares)	100,783,496	100,434,512	100,652,685	98,892,574
Common stock and common stock equivalents (in shares)	100,783,496	100,434,512	100,652,685	98,892,574
Loss per common share – basic and diluted
Earnings Per Share, Basic and Diluted	$ (0.39)	$ (0.28)	$ (1.23)	$ (0.49)

Net Loss Per Share - Additional

Net Loss Per Share - Additional Information (Detail) - shares shares in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Anti-dilutive effect on calculation of diluted loss per common share attributable to outstanding stock-based awards (in shares)	6.1	3.9

Supplementary Cash Flow Infor_3

Supplementary Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Extinguishment of Debt [Line Items]
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 211,600
Cash and cash equivalents	235,199	$ 454,933	$ 424,169	$ 445,452
Restricted cash – current (note 18)	50,798	55,466	40,493	38,179
Restricted cash – non-current (note 18)	36,886	34,627	40,977	68,543
Cash, cash equivalents, restricted cash and restricted cash equivalents	322,883	545,026	$ 505,639	$ 552,174
Toledo Spirit [Member] | Obligations [Member]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount	$ 23,600
Teide Spirit and Toledo Spirit [Member] | Obligations [Member]
Extinguishment of Debt [Line Items]
Extinguishment of Debt, Amount		$ 23,100