Derivative Instruments and Hedging Activities Derivatives and Hedging Activities - FX Forwards (Details) $ in Thousands	Jun. 30, 2019 USD ($) € / $
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

- Definition

The amount of foreign currency that the entity has contractually agreed, or for which it has the option, to buy or sell with respect to the contract being described.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Expected maturity amounts of foreign currency derivatives in year two

+ References

No definition available.

+ Details

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Namespace Prefix:	tk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Average contractual rate at which a foreign currency can be purchased or sold.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

No definition available.

+ Details

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