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Pension Plans and Postretirement Benefits
 9 Months Ended
Sep. 30, 2020
Retirement Benefits [Abstract]  
Pension Plans and Postretirement Benefits PENSION PLANS AND POSTRETIREMENT BENEFITS
We record the service cost component of net periodic benefit cost within Operating income on our condensed consolidated statements of income. For the three months ended September 30, 2020 and 2019, these amounts were $2.5 million and $2.1 million, respectively. For the nine months ended September 30, 2020 and 2019, these amounts were $8.5 million and $7.3 million, respectively. All other components of net periodic benefit cost are included in Other – net within the condensed consolidated statements of income. For the three months ended September 30, 2020 and 2019, these amounts were $(9.5) million and $(5.3) million, respectively. For the nine months ended September 30, 2020 and 2019, these amounts were $(28.5) million and $(15.8) million, respectively. Components of net periodic benefit cost included in net income were as follows:
 Pension BenefitsOther Benefits
Three Months Ended
September 30,		Nine Months Ended
September 30,		Three Months Ended
September 30,		Nine Months Ended
September 30,
 20202019202020192020201920202019
 (In thousands)
Service cost$2,382 $1,914 $7,980 $6,839 $153 $145 $480 $434 
Interest cost9,359 11,567 27,882 34,722 393 586 1,207 1,756 
Expected return on plan assets
(19,368)(17,490)(57,943)(52,344)(675)(627)(2,019)(1,882)
Amortization of prior service cost (credit)
877 727 2,527 2,177 (48)(78)(145)(233)
Net periodic benefit (income) cost
$(6,750)$(3,282)$(19,554)$(8,606)$(177)$26 $(477)$75