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Derivative Financial Instruments - Foreign Exchange Rate Risk (Details)
€ in Millions, ¥ in Millions, $ in Millions, $ in Millions
9 Months Ended 47 Months Ended
Sep. 30, 2021
SGD ($)
$ / bbl
bbl
Sep. 30, 2021
SGD ($)
$ / bbl
bbl
Sep. 30, 2021
USD ($)
$ / bbl
Sep. 30, 2021
EUR (€)
$ / bbl
Sep. 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 182,495 596,367              
Derivative, average price risk option strike price | $ / bbl 70.40 70.40 70.40 70.40 70.40        
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     28.8            
USD | Foreign Exchange Forward | Short | Designated as Hedging Instrument                  
Derivative [Line Items]                  
Derivative, notional amount     0.0 € 24.0          
USD | Cross Currency Interest Rate Contract                  
Derivative [Line Items]                  
Derivative, notional amount               $ 86.1  
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 | ¥         ¥ 6,131.7        
Yen | Foreign Exchange Forward | Short | Designated as Hedging Instrument                  
Derivative [Line Items]                  
Derivative, notional amount     24.6 27.7          
Yen | Cross Currency Interest Rate Contract                  
Derivative [Line Items]                  
Derivative, notional amount | ¥                 ¥ 9,400.0
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 $ 28.7 $ 28.7              
SGD | Foreign Exchange Forward | Short | Designated as Hedging Instrument                  
Derivative [Line Items]                  
Derivative, notional amount     $ 17.8 € 3.0