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Financial Instruments - Schedule of Estimated Fair Value of Partnership's Financial Instruments on Recurring Basis (Parenthetical) (Detail) - BG Joint Venture [Member] - Shipbuilding supervision and crew training services [Member]
$ in Millions
12 Months Ended
Dec. 31, 2015
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Discount rate over remaining duration of contract 8.00%
Fair Value Asset (Liability) [Member] | Level 3 [Member]  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Long-term receivable included in accounts receivable and other assets $ 18.2