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Derivative Financial Instruments - Foreign Exchange Rate Risk (Details) € in Millions, ¥ in Millions, $ in Millions | 9 Months Ended | 35 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2020 SGD ($) $ / bbl bbl | Sep. 30, 2020 SGD ($) $ / bbl bbl | Sep. 30, 2020 USD ($) $ / bbl | Sep. 30, 2020 EUR (€) $ / bbl | Sep. 30, 2020 JPY (¥) $ / bbl | Dec. 31, 2019 SGD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 JPY (¥)
Foreign Exchange Forward |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative contract term | 18 months |  |  |  |  |  |  |
Options Held |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, nonmonetary notional amount, volume | bbl | 137,035 | 439,732 |  |  |  |  |  |
Derivative, average price risk option strike price | $ / bbl | 60.47 | 60.47 | 60.47 | 60.47 | 60.47 |  |  |
USD | Forward Contracts |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | $ 13,400,000 |  |  |  | $ 13,400,000 |
USD | Foreign Exchange Forward | Long | Designated as Hedging Instrument |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | 74,700,000 |  |  |  |  |
USD | Foreign Exchange Forward | Short | Designated as Hedging Instrument |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | 0 | € 64.8 |  |  |  |
USD | Cross Currency Interest Rate Contract |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  | 90,000,000 |
USD | Cross Currency Interest Rate Contract | Net Investment Hedges |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  | $ 90,000,000 |
Yen | Foreign Exchange Forward | Long | Designated as Hedging Instrument |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount | ¥ |  |  |  |  | ¥ 9,876.6 |  |  |
Yen | Foreign Exchange Forward | Short | Designated as Hedging Instrument |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | 55,900,000 | 32.5 |  |  |  |
Yen | Cross Currency Interest Rate Contract |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount | ¥ |  |  |  |  |  |  |  | ¥ 9,800.0
SGD | Forward Contracts |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount | $ 601.5 | $ 601.5 |  |  |  | $ 601.5 |  |
SGD | Foreign Exchange Forward | Long | Designated as Hedging Instrument |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount | $ 57.9 | $ 57.9 |  |  |  |  |  |
SGD | Foreign Exchange Forward | Short | Designated as Hedging Instrument |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | $ 33,300,000 | € 7.2 |  |  |  |

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