Operating Leases - Charters-in (Detail) $ in Millions	12 Months Ended
Dec. 31, 2018 USD ($)
Property Subject to or Available for Operating Lease [Line Items]
Minimum commitments to be incurred by the company in current year	$ 116.3
Minimum commitments to be incurred by the company in second year	90.4
Minimum commitments to be incurred by the company in third year	53.4
Minimum commitments to be incurred by the company in fourth year	9.1
Minimum commitments to be incurred by the company in fifth year	9.1
Minimum commitments to be incurred by the company thereafter	5.6
Charters-in
Property Subject to or Available for Operating Lease [Line Items]
Total	283.9
Teekay Corporation
Property Subject to or Available for Operating Lease [Line Items]
Minimum commitments to be incurred by the company in current year	92.6
Minimum commitments to be incurred by the company in second year	74.3
Minimum commitments to be incurred by the company in third year	53.4
Minimum commitments to be incurred by the company in fourth year	9.1
Minimum commitments to be incurred by the company in fifth year	9.1
Minimum commitments to be incurred by the company thereafter	5.6
Teekay LNG - Marubeni Joint Venture \| Teekay LNG
Property Subject to or Available for Operating Lease [Line Items]
Minimum commitments to be incurred by the company in current year	23.7
Minimum commitments to be incurred by the company in second year	16.1
Minimum commitments to be incurred by the company in third year	0.0
Minimum commitments to be incurred by the company in fourth year	0.0
Minimum commitments to be incurred by the company in fifth year	0.0
Minimum commitments to be incurred by the company thereafter	$ 0.0
Ownership percentage	52.00%

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
-Subparagraph (Note 3)
-URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
-Subparagraph (Note 3)
-URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611443-123010

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