XML 34 R23.htm IDEA: XBRL DOCUMENT v3.22.2
PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Tables)
 6 Months Ended
Jun. 30, 2022
Retirement Benefits [Abstract]  
Net Periodic Benefit Cost for All Significant Plans The following table provides the components of the Corporation's net periodic benefit cost (credit) for all significant plans:
Net Periodic Benefit Cost (Credit) for All Significant Plans Three Months EndedSix Months Ended
In millionsJun 30, 2022Jun 30, 2021Jun 30, 2022Jun 30, 2021
Defined Benefit Pension Plans  
Service cost $9 $6 $18 $14 
Interest cost 23 21 46 40 
Expected return on plan assets (56)(56)(113)(107)
Amortization of prior service credit(1)— (1)— 
Amortization of net loss 27 28 54 58 
Curtailment gain— — — (7)
Net periodic benefit cost (credit)$2 $(1)$4 $(2)
Other Postretirement Benefit Plan
Interest cost $1 $1 $2 $2 
Amortization of net gain(2)(1)(4)(2)
Net periodic benefit cost (credit)$(1)$— $(2)$—