Defined Benefit Plan, Plan Assets, Reimbursement from CTA

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- Definition

Defined Benefit Plan, Period of Return for Fixed Income Investments From Discount Rate Assumptions

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- Definition

Defined Benefits Plan, Expected Future Reimbursement from CTA, Net Fiscal Year

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- Definition

Amount of gross other benefits from an other postretirement benefit plan expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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- Definition

Plan Asset Underlying Investment Redemption Notice

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- Definition

Plan Assets Redemptions per Period

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No definition available.

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- Definition

Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

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- Definition

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year.

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- Definition

Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status.

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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement.

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- Definition

Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement.

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Amount of payment, which decreases plan assets of defined benefit plan, for irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Transaction constituting settlement includes, but is not limited to, making lump-sum cash payment to participant in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contract.

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- Definition

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

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- Definition

Year ultimate health care cost trend rate is expected to be reached, in CCYY format.

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- Definition

Amount of cost for defined contribution plan.

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The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

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Benefit Plans Benefit Plans - Textuals (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) years	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Healthcare cost trend rate assumed for next year	6.30%	6.50%
Year that rate reaches ultimate trend rate	2025	2025
Expected rate of return period	20
Cost recognized	$ 6.9	$ 0.7	$ 10.3
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	34.5
Defined Benefits Plan, Expected Future Reimbursement from CTA, Net Fiscal Year	17.0
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	27.8
Benefit Plan, Plan Assets, Reimbursement from CTA	13.5
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Settlement loss	$ 0.0	$ 0.0	$ 0.0
Discount rate	5.17%	5.70%
Actuarial loss (gain)	$ 1.3	$ (1.8)
Settlements, plan assets	0.0	0.0
Employer contributions	0.7	0.8
2021, gross	0.9
Settlements	$ 0.0	0.0
Other common collective trusts
Defined Benefit Plan Disclosure [Line Items]
Plan Asset Underlying Investment Redemption Notice	1 day
Multi-strategy hedge funds
Defined Benefit Plan Disclosure [Line Items]
Plan Assets Redemptions per Period \| years	0.5
Plan Asset Underlying Investment Redemption Notice	95 days
Private equity funds
Defined Benefit Plan Disclosure [Line Items]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	$ 2.4	$ 2.4
Real estate
Defined Benefit Plan Disclosure [Line Items]
Plan Assets Redemptions per Period \| years	0.25
Plan Asset Underlying Investment Redemption Notice	30 days
Fixed Income Securities [Member] \| Other common collective trusts
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	41.00%	44.00%
Retail [Member] \| Real estate
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	21.00%	24.00%
Collateralized Mortgage Backed Securities [Member] \| Other common collective trusts
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	25.00%	24.00%
Corporate Debt Securities [Member] \| Other common collective trusts
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	55.00%	46.00%
US Treasury and Government [Member] \| Other common collective trusts
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	20.00%	30.00%
Residential [Member] \| Real estate
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	22.00%	21.00%
Buyout Private Equity Funds [Member] \| Private equity funds
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	46.00%	44.00%