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Pension and Other Postretirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2021

Components of Net Periodic Benefit Expense (Income) [Table Text Block]


	Pension		Other Postretirement
Components of Net Periodic Benefit Cost (Credit)	2021	2020	2021	2020
Millions
Quarter Ended September 30,
Service Cost	$2.7	$2.7	$0.9	$0.8
Non-Service Cost Components (a)
Interest Cost	6.1	6.9	1.1	1.2
Expected Return on Plan Assets	(10.8)	(10.6)	(2.4)	(2.4)
Amortization of Prior Service Credits	—	—	(1.9)	(2.0)
Amortization of Net Loss	4.7	3.2	0.7	0.3

Net Periodic Benefit Cost (Credit)	$2.7	$2.2	$(1.6)	$(2.1)

Nine Months Ended September 30,
Service Cost	$8.2	$8.0	$2.7	$2.5
Non-Service Cost Components (a)
Interest Cost	18.4	20.9	3.3	3.7
Expected Return on Plan Assets	(32.5)	(32.0)	(7.3)	(7.3)
Amortization of Prior Service Credits	(0.1)	(0.1)	(5.7)	(6.0)
Amortization of Net Loss	14.1	9.6	2.2	0.8

Net Periodic Benefit Cost (Credit)	$8.1	$6.4	$(4.8)	$(6.3)

(a)These components of net periodic benefit cost (credit) are included in the line item “Other” under Other Income (Expense) on the Consolidated Statement of Income.