Note 10. Employee Retirement Plans Employee Retirement Plans (Tables)

12 Months Ended

Dec. 31, 2020

Schedule of Allocation of Plan Assets [Table Text Block]

The estimated fair value of the plans' assets at December 31, 2019, indicating input levels used to determine fair value are as follows:


	Fair Value Measurement as of December 31, 2019
	(in millions)
	Level 1		Level 2		Level 3		Total
Temporary cash investments	$	13.5	$	—	$	—	$	13.5
Fixed Income – Government and agencies	—		121.7		—		121.7
Fixed Income – Corporate	—		370.5		—		370.5
Fixed Income – Asset-backed securities	—		2.2		—		2.2
Fixed Income – Collateralized mortgage-backed	—		4.1		—		4.1
Equity common trust funds	—		29.1		—		29.1
Debt common trust funds	—		—		7.4		7.4
	$	13.5	$	527.6	$	7.4	$	548.5

Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

Amounts recognized in other comprehensive income (loss)


	Year Ended December 31,
	2020		2019		2018
	(in millions)
Settlement of pension plan	$	151.5	$	—	$	—
Actuarial gain (loss)	10.4		(37.7)		(12.5)
Amortization of actuarial loss	6.0		4.6		4.8
Amortization of prior service cost	1.2		—		—
New prior service cost base	—		(1.5)		—
Total before income taxes	169.1		(34.6)		(7.7)
Income tax (benefit) expense	39.2		(7.9)		(1.8)
Net amount recognized in other comprehensive income (loss)	$	129.9	$	(26.7)	$	(5.9)

Defined Benefit Plan, Assumptions [Table Text Block]

Actuarial assumptions


	Year Ended December 31,
	2020		2019		2018
Assumptions used to determine benefit obligations at the annual measurement date were:
Obligation discount rate	N/A		2.73	%	4.45	%

Assumptions used to determine net periodic benefit costs were:
Obligation discount rate	2.71	%	4.45	%	3.79	%
Long-term rate of return on plan assets	3.90	%	4.90	%	5.65	%

Schedule of Costs of Retirement Plans [Table Text Block]

Components of Net Periodic Benefit Cost and Other Retirement Expenses


	Year Ended December 31,
	2020		2019		2018
	(in millions)
Expense Components
Service cost	$	—	$	0.1	$	0.1
Interest	14.8		19.7		18.3
Expected return on plan assets	(20.9)		(23.0)		(27.4)
Amortization of actuarial loss	6.0		4.6		4.8
Amortization of prior service cost	1.2		—		—
Settlement loss	151.5		—		—
Other	—		—		0.6
Net periodic benefit cost	152.6		1.4		(3.6)
Profit sharing	9.0		11.0		11.1
Net expense	$	161.6	$	12.4	$	7.5

Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan [Table Text Block]

Obligations and funded status

Information regarding the terminated Pension Plan and the Supplemental Executive Retirement Plan ("SERP") based upon a December 31 measurement date is as follows:


	Year Ended December 31,
	2020		2019
	(in millions)
Accumulated Benefit Obligations	$	15.5	$	557.9
Projected Benefit Obligations:
Beginning of year	$	557.9	$	453.2
Service cost	—		0.1
Interest	14.8		19.7
Benefits paid	(23.0)		(22.2)
Actuarial (gain) loss	18.0		105.6
Plan amendments	—		1.5
Settlements	(552.2)		—

End of year	$	15.5	$	557.9
Plans' Assets:
Beginning of year	$	548.5	$	478.7
Actual return on assets	49.3		90.9
Employer contributions	1.0		1.1
Benefits paid	(23.0)		(22.2)

Settlements	(552.2)		—
End of year	$	23.6	$	548.5

Consolidated Balance Sheet Components:
Pension Plan:
Other assets	$	23.6	$	5.5
Accrued liabilities	—		—
Net funded status	$	23.6	$	5.5

SERP:
Other assets	$	—	$	—
Accrued liabilities	(15.5)		(14.9)
Net funded status	$	(15.5)	$	(14.9)