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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