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Employee Benefit Plans
3 Months Ended
Mar. 31, 2018
Employee Benefit Plans  
Employee Benefit Plans

17. Employee Benefit Plans

The Firm sponsors various retirement plans for the majority of its U.S. employees. The Firm provides certain other postretirement benefits, primarily health care and life insurance, to eligible U.S. employees.

Components of Net Periodic Benefit Expense (Income) for Pension and Other Postretirement Plans
Three Months Ended
March 31,
$ in millions20182017
Service cost, benefits earned during the period $4$4
Interest cost on projected benefit obligation 3437
Expected return on plan assets (28)(29)
Net amortization of prior service credit(4)
Net amortization of actuarial loss 64
Net periodic benefit expense (income)$16$12