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Investments - Tanker Investments Ltd - Additional Information (Detail) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2014 shares | Dec. 31, 2016 USD ($) member shares | Dec. 31, 2015 USD ($)
Net Investment Income [Line Items] |  |  |
Preferred stock, share issued (in shares) |  | 0 |
Percentage of combined ownership interest |  | 100.00% | 17.62%
Teekay and Teekay Tankers [Member] |  |  |
Net Investment Income [Line Items] |  |  |
Combined interest of shares held in investment owned |  | 19.55% | 17.62%
Tanker Investments Limited [Member] | Series A- One Preferred Stock [Member] |  |  |
Net Investment Income [Line Items] |  |  |
Preferred stock, share issued (in shares) | 1 |  |
Tanker Investments Limited [Member] | Series A- Two Preferred Stock [Member] |  |  |
Net Investment Income [Line Items] |  |  |
Preferred stock, share issued (in shares) | 1 |  |
Tanker Investments Limited [Member] | Warrant [Member] | Derivatives Not Designated as a Cash Flow Hedge [Member] |  |  |
Net Investment Income [Line Items] |  |  |
Derivatives not designated as a cash flow hedge | $ |  | $ 0.6 | $ 10.3
Tanker Investments Limited [Member] | Teekay Tankers [Member] |  |  |
Net Investment Income [Line Items] |  |  |
Number of board members | member |  | 1 |
Tanker Investments Limited [Member] | Teekay Tankers [Member] | Warrant [Member] |  |  |
Net Investment Income [Line Items] |  |  |
Number of shares available through exercise of stock purchase warrant | 1,500,000 |  |
Tanker Investments Limited [Member] | Teekay and Teekay Tankers [Member] |  |  |
Net Investment Income [Line Items] |  |  |
Percentage of combined ownership interest | 20.00% |  |

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