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Derivative Financial Instruments - Summary of Potential Effect of Offsetting Derivatives (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Derivative Asset [Abstract]    
Gross Amounts of Recognized Assets/Liabilities $ 76 $ 37
Gross Amounts Offset on our Condensed Consolidated Balance Sheets 0 0
Amounts of Assets/Liabilities Presented on our Condensed Consolidated Balance Sheets 76 37
Derivative Financial Instruments (5) (6)
Cash Collateral Received/ Pledged 0 0
Net Amount (Legal Offset) 71 31
Derivative Liability [Abstract]    
Gross Amounts of Recognized Assets/Liabilities (5) (8)
Gross Amounts Offset on our Condensed Consolidated Balance Sheets 0 0
Amounts of Assets/Liabilities Presented on our Condensed Consolidated Balance Sheets (5) (8)
Derivative Financial Instruments 5 7
Cash Collateral Received/ Pledged 0 0
Net Amount (Legal Offset) $ 0 $ (1)