Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2023

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Components of our accumulated other comprehensive loss, after tax, and related changes are as follows:

	Net Unrealized Gain (Loss) on Securities		Effect of Change in Discount Rate Assumptions on the LFPB1		Net Gain (Loss) on Hedges		Foreign Currency Translation Adjustment		Unrecognized Pension and Postretirement Benefit Costs		Total
	(in millions of dollars)
Balance at January 1, 2021, As Adjusted	$	5,315.8	$	(10,932.5)	$	97.8	$	(261.3)	$	(530.0)	$	(6,310.2)
Other Comprehensive Income (Loss) Before Reclassifications	(1,260.7)		2,361.8		14.7		(12.8)		116.3		1,219.3
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	(40.7)		—		(50.7)		—		17.7		(73.7)
Net Other Comprehensive Income (Loss)	(1,301.4)		2,361.8		(36.0)		(12.8)		134.0		1,145.6
Balance at December 31, 2021	4,014.4		(8,570.7)		61.8		(274.1)		(396.0)		(5,164.6)
Other Comprehensive Income (Loss) Before Reclassifications	(7,066.0)		8,884.6		(30.4)		(116.0)		49.7		1,721.9
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	23.2		—		(41.0)		—		12.2		(5.6)
Net Other Comprehensive Income (Loss)	(7,042.8)		8,884.6		(71.4)		(116.0)		61.9		1,716.3
Balance at December 31, 2022	(3,028.4)		313.9		(9.6)		(390.1)		(334.1)		(3,448.3)
Other Comprehensive Income (Loss) Before Reclassifications	1,069.3		(962.3)		(37.4)		69.0		(16.9)		121.7
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	40.0		—		(26.7)		—		5.3		18.6
Net Other Comprehensive Income (Loss)	1,109.3		(962.3)		(64.1)		69.0		(11.6)		140.3
Balance at December 31, 2023	$	(1,919.1)	$	(648.4)	$	(73.7)	$	(321.1)	$	(345.7)	$	(3,308.0)
1Liability for Future Policy Benefits

Schedule of Reclassification out of Accumulated Other Comprehensive Income (Loss)

Amounts reclassified from accumulated other comprehensive income (loss) were recognized in our consolidated statements of income as follows:

	Year Ended December 31
	2023		2022		2021
	(in millions of dollars)
Net Unrealized Gain (Loss) on Securities
Net Investment Gain (Loss)
Gain (Loss) on Sales on Securities	$	(48.7)	$	(24.8)	$	60.8
Credit Losses on Fixed Maturity Securities	(2.2)		(4.6)		(9.3)
	(50.9)		(29.4)		51.5
Income Tax Expense (Benefit)	(10.9)		(6.2)		10.8
Total	$	(40.0)	$	(23.2)	$	40.7
Net Gain (Loss) on Hedges
Net Investment Income
Gain on Interest Rate Swaps and Forwards	$	34.7	$	51.1	$	60.6
Gain (Loss) on Foreign Exchange Contracts	(0.5)		(1.0)		1.7
Net Investment Gain (Loss)
Gain on Interest Rate Swaps	—		—		2.0
Gain (Loss) on Foreign Exchange Contracts	(0.4)		1.8		(0.1)
	33.8		51.9		64.2
Income Tax Expense	7.1		10.9		13.5
Total	$	26.7	$	41.0	$	50.7
Unrecognized Pension and Postretirement Benefit Costs
Other Expenses
Amortization of Net Actuarial Loss	$	(7.2)	$	(15.7)	$	(22.6)
Amortization of Prior Service Credit	0.2		0.2		0.2
	(7.0)		(15.5)		(22.4)
Income Tax Benefit	(1.7)		(3.3)		(4.7)
Total	$	(5.3)	$	(12.2)	$	(17.7)