STOCKHOLDERS' EQUITY (Tables)

6 Months Ended

Jun. 30, 2020

Stockholders' Equity Note [Abstract]

Schedule of accumulated other comprehensive income (loss)

Changes in Accumulated Other Comprehensive Income (Loss)

The table below presents changes in AOCI by component for the three and six months ended June 30, 2020 and 2019. All amounts are net of tax (in millions).

	Three Months Ended June 30, 2020										Three Months Ended June 30, 2019
	CTA		Derivative Hedging Adj.		Debt & Equity Securities Adj.		Pension Liability Adj.		Total		CTA		Derivative Hedging Adj.		Debt & Equity Securities Adj.		Pension Liability Adj.		Total
Beginning balance	$	(263.0)	$	(5.0)	$	2.4	$	(48.1)	$	(313.7)	$	(227.7)	$	(5.5)	$	1.6	$	(55.5)	$	(287.1)
Other comprehensive income (loss) before reclassifications	19.5		(3.6)		1.2		(0.1)		17.0		(4.0)		0.6		0.5		0.7		(2.2)
Amounts reclassified from AOCI	—		1.5		—		0.4		1.9		—		1.4		—		0.6		2.0
Net other comprehensive income (loss)	19.5		(2.1)		1.2		0.3		18.9		(4.0)		2.0		0.5		1.3		(0.2)
Ending balance	$	(243.5)	$	(7.1)	$	3.6	$	(47.8)	$	(294.8)	$	(231.7)	$	(3.5)	$	2.1	$	(54.2)	$	(287.3)

	Six Months Ended June 30, 2020										Six Months Ended June 30, 2019
	CTA		Derivative Hedging Adj.		Debt & Equity Securities Adj.		Pension Liability Adj.		Total		CTA		Derivative Hedging Adj.		Debt & Equity Securities Adj.		Pension Liability Adj.		Total
Beginning balance	$	(208.2)	$	(0.8)	$	2.6	$	(51.1)	$	(257.5)	$	(225.6)	$	(4.4)	$	0.8	$	(55.6)	$	(284.8)
Other comprehensive income (loss) before reclassifications	(35.3)		(9.9)		1.0		2.5		(41.7)		(6.1)		(2.2)		1.3		0.2		(6.8)
Amounts reclassified from AOCI	—		3.6		—		0.8		4.4		—		3.1		—		1.2		4.3
Net other comprehensive income (loss)	(35.3)		(6.3)		1.0		3.3		(37.3)		(6.1)		0.9		1.3		1.4		(2.5)
Ending balance	$	(243.5)	$	(7.1)	$	3.6	$	(47.8)	$	(294.8)	$	(231.7)	$	(3.5)	$	2.1	$	(54.2)	$	(287.3)

Schedule of weighted-average assumptions used in the valuations

The following table presents the weighted-average assumptions used in the valuation:

	Grant date
	February 26, 2020
Dividend yields	2.12	%
Expected volatility	36.36	%
Risk free interest rate	1.14	%
Expected life (in years)	3