XML 40 R27.htm IDEA: XBRL DOCUMENT v3.22.1
Employee Benefits (Tables)
3 Months Ended
Mar. 31, 2022
Retirement Benefits [Abstract]  
Schedule of net periodic benefit cost
The components of net periodic benefit cost for our retirement plans and postretirement plans for the three months ended March 31 are as follows: 
(in millions)20222021
Service cost$$
Interest cost12 10 
Expected return on assets(22)(26)
Amortization of prior service credit / actuarial loss
Net periodic benefit cost$(6)$(11)