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Retirement Plans (Tables)
9 Months Ended
Jun. 30, 2022
Retirement Benefits [Abstract]  
Schedule of Net Periodic Benefit Cost The following table contains the components of net periodic benefit cost:
Three Months Ended
June 30,
Nine Months Ended
June 30,
(in millions)2022202120222021
Service cost$$$$
Interest cost
Expected return on plan assets(3)(6)(11)(14)
Net actuarial and settlement/curtailment (gain) loss(3)(1)(3)(1)
Net periodic benefit cost$(3)$(2)$(1)$(2)