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Fair Value Measurements - Interest Rate Derivatives (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Apr. 29, 2020
Interest Rate Swap | Cash Flow Hedge | Designated as Hedging Instrument    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Asset value of the forward interest rate swap $ 11 $ 250