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Employee Benefit Plans
 6 Months Ended
Jun. 30, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Employee Benefit Plans EMPLOYEE BENEFIT PLANS
Net periodic defined benefit cost (credit) is comprised of service cost and other components of net benefit cost (credit). Service cost is included in salaries and benefits expense and other components of net benefit cost (credit) are included in other noninterest expenses on the Consolidated Statements of Comprehensive Income. For further information on the Corporation's employee benefit plans, refer to Note 17 to the consolidated financial statements in the Corporation's 2023 Annual Report.
The components of net periodic benefit cost (credit) for the Corporation's qualified pension plan, non-qualified pension plan and postretirement benefit plan are as follows.
Qualified Defined Benefit Pension PlanThree Months Ended June 30,Six Months Ended June 30,
(in millions)2024202320242023
Service cost$9 $7 $17 $15 
Other components of net benefit credit:
Interest cost21 22 42 43 
Expected return on plan assets(45)(42)(90)(83)
Amortization of prior service credit(4)(3)(7)(7)
Amortization of net loss 5 8 11 16 
Total other components of net benefit credit(23)(15)(44)(31)
Net periodic defined benefit credit$(14)$(8)$(27)$(16)
Non-Qualified Defined Benefit Pension PlanThree Months Ended June 30,Six Months Ended June 30,
(in millions)2024202320242023
Service cost$— $— $1 $1 
Other components of net benefit cost:
Interest cost2 2 4 4 
Amortization of prior service credit(1)(2)(3)(4)
Amortization of net loss1 1 2 2 
Total other components of net benefit cost2 1 3 2 
Net periodic defined benefit cost$2 $1 $4 $3 
Postretirement Benefit PlanThree Months Ended June 30,Six Months Ended June 30,
(in millions)2024202320242023
Other components of net benefit credit:
Expected return on plan assets$— $— $(1)$(1)
Net periodic defined benefit credit$— $— $(1)$(1)