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Consolidations and Transfers of Financial Assets (Tables)
12 Months Ended
Dec. 31, 2021
Consolidations and Transfers of Financial Assets [Abstract]  
Schedule of 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,
20212020
(Dollars in millions)
Assets and liabilities recorded in our consolidated balance sheets related to unconsolidated mortgage-backed trusts:
Assets:
Trading securities:
Fannie Mae$984 $1,611 
Non-Fannie Mae3,030 3,608 
Total trading securities4,014 5,219 
Available-for-sale securities:
Fannie Mae495 1,168 
Non-Fannie Mae200 318 
Total available-for-sale securities695 1,486 
Other assets35 41 
Other liabilities(41)(67)
Net carrying amount
$4,703 $6,679