Pension and Other Postretirement Benefit Plans

9 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

Pension and Other Postretirement Benefit Plans [Text Block]

PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS

	Pension		Other Postretirement
Components of Net Periodic Benefit Cost (Credit)	2020	2019	2020	2019
Millions
Quarter Ended September 30,
Service Cost	$2.7	$2.3	$0.8	$1.0
Non-Service Cost Components (a)
Interest Cost	6.9	7.9	1.2	1.9
Expected Return on Plan Assets	(10.6)	(11.0)	(2.4)	(2.6)
Amortization of Prior Service Credits	—	—	(2.0)	(0.4)
Amortization of Net Loss	3.2	1.9	0.3	0.1
Net Periodic Benefit Cost (Credit)	$2.2	$1.1	$(2.1)	—
Nine Months Ended September 30,
Service Cost	$8.0	$7.0	$2.5	$2.8
Non-Service Cost Components (a)
Interest Cost	20.9	23.9	3.7	5.7
Expected Return on Plan Assets	(32.0)	(33.3)	(7.3)	(7.9)
Amortization of Prior Service Credits	(0.1)	(0.2)	(6.0)	(1.5)
Amortization of Net Loss	9.6	5.1	0.8	0.2
Net Periodic Benefit Cost (Credit)	$6.4	$2.5	$(6.3)	$(0.7)

(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.

Employer Contributions. For the nine months ended September 30, 2020, we contributed $10.7 million in cash to the defined benefit pension plans ($10.4 million for the nine months ended September 30, 2019); we do not expect to make additional contributions to our defined benefit pension plans in 2020. For the nine months ended September 30, 2020, and 2019, we made no contributions to our other postretirement benefit plans; we do not expect to make any contributions to our other postretirement benefit plans in 2020.