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Consolidations and Transfers of Financial Assets (Tables)
12 Months Ended
Dec. 31, 2020
Consolidations and Transfers of Financial Assets [Abstract]  
Unconsolidated Variable Interest Entities The following table displays the carrying amount and classification of our assets and liabilities that relate to our involvement with unconsolidated securitization and resecuritization trusts.
As of December 31,
20202019
(Dollars in millions)
Assets and liabilities recorded in our consolidated balance sheets related to unconsolidated mortgage-backed trusts:
Assets:
Trading securities:
Fannie Mae$1,611 $2,543 
Non-Fannie Mae3,608 5,100 
Total trading securities5,219 7,643 
Available-for-sale securities:
Fannie Mae1,168 1,524 
Non-Fannie Mae318 574 
Total available-for-sale securities1,486 2,098 
Other assets41 56 
Other liabilities(67)(78)
Net carrying amount
$6,679 $9,719