Derivative Instruments and Hedging Activities - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 9.5	$ 9.8
Derivative Liability, Fair Value, Gross Liability	55.8	86.1
Restricted cash	$ 6.8	22.3
Teekay Offshore \| Series D Warrant
Derivative [Line Items]
Number of shares available through exercise of stock purchase warrant	1,755,000
Stock purchase warrants	$ 0.2
Teekay Offshore \| Series D Warrant
Derivative [Line Items]
Stock purchase warrants		1.3
Brookfield Transaction \| Teekay Offshore \| Stock Purchase Warrants
Derivative [Line Items]
Number of shares available through exercise of stock purchase warrant	15,500,000
Stock purchase warrants	$ 11.8	$ 29.4

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

+ References

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