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Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2022
Accounting Policies [Abstract]  
Supplemental Cash Flow Information
Supplemental Cash Flow Information
Significant noncash activities are presented in Table 1.1.

Table 1.1: Supplemental Cash Flow Information
Quarter ended March 31,
(in millions)20222021
Available-for-sale debt securities purchased from securitization of LHFS (1)$1,053 — 
Held-to-maturity debt securities purchased from securitization of LHFS (1)638 10,252 
Transfers from loans to LHFS2,827 6,249 
Transfers from available-for-sale debt securities to held-to-maturity debt securities14,651 16,617 
(1)Predominantly represents agency mortgage-backed securities purchased upon settlement of the sale and securitization of our conforming residential mortgage loans. See Note 8 (Securitizations and Variable Interest Entities) for additional information.