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Commitments, Guarantees and Contingencies (Tables)
6 Months Ended
Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Guarantor Obligations
These credit-risk-related contingent features stipulate that if the subsidiary were to be downgraded or lose its investment grade credit rating (based on its senior unsecured debt rating), it would be required to provide additional collateral. The following table discloses the potential additional credit rating contingent contractual collateral obligations as of June 30, 2020:
Potential Collateral ObligationsUtilities and FETFE Total
 (In millions)
Contractual Obligations for Additional Collateral
Upon Further Downgrade$47  $—  $47  
Surety Bonds (Collateralized Amount) (1)
66  257  323  
Total Exposure from Contractual Obligations$113  $257  $370  
(1)Surety Bonds are not tied to a credit rating. Surety Bonds’ impact assumes maximum contractual obligations (typical obligations require 30 days to cure).