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Derivative Financial Instruments - Foreign Exchange Rate Risk (Details) € in Millions, ¥ in Millions, $ in Millions, $ in Millions | 6 Months Ended | 44 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2021 SGD ($) $ / bbl bbl | Jun. 30, 2021 SGD ($) $ / bbl bbl | Jun. 30, 2021 USD ($) $ / bbl | Jun. 30, 2021 EUR (€) $ / bbl | Jun. 30, 2021 JPY (¥) $ / bbl | Dec. 31, 2020 SGD ($) | Dec. 31, 2020 USD ($) | 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 | 171,634 | 552,686 |  |  |  |  |  |  |
Derivative, average price risk option strike price | $ / bbl | 65.77 | 65.77 | 65.77 | 65.77 | 65.77 |  |  |  |
USD | Forward Contracts |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | $ 13.4 |  |  |  | $ 13.4 |  |
USD | Foreign Exchange Forward | Long | Designated as Hedging Instrument |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | 38.7 |  |  |  |  |  |
USD | Foreign Exchange Forward | Short | Designated as Hedging Instrument |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | 0.0 | € 32.6 |  |  |  |  |
USD | Cross Currency Interest Rate Contract |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  |  | $ 86.6 |
USD | Cross Currency Interest Rate Contract | Net Investment Hedges: |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  |  | $ 90.0 |
Yen | Foreign Exchange Forward | Long | Designated as Hedging Instrument |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount | ¥ |  |  |  |  | ¥ 8,568.0 |  |  |  |
Yen | Foreign Exchange Forward | Short | Designated as Hedging Instrument |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | 35.5 | 38.0 |  |  |  |  |
Yen | Cross Currency Interest Rate Contract |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount | ¥ |  |  |  |  |  |  |  |  | ¥ 9,500.0
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 | $ 47.8 | $ 47.8 |  |  |  |  |  |  |
SGD | Foreign Exchange Forward | Short | Designated as Hedging Instrument |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Derivative, notional amount |  |  | $ 28.6 | € 5.8 |  |  |  |  |

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