Liability for Future Policy Benefit Activity (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023		Mar. 31, 2022		Dec. 31, 2022		Dec. 31, 2021	Mar. 31, 2021	Jan. 01, 2021		Dec. 31, 2020
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change		$ 49.3		$ (83.9)
Liability for Future Policy Benefits		39,351.5		46,474.7	[1]	$ 38,577.1	[2]
Liability for Future Policy Benefit, Gross Premium Income		2,390.0		2,345.7
Liability for Future Policy Benefit, Interest Expense		418.1		426.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		96,591.0		97,828.7
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		35,284.9		35,260.2
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 23,805.9		$ 23,907.2
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		4.80%		4.70%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		4.80%		3.40%		5.00%		2.50%
Liability for Future Policy Benefit, Weighted-Average Duration		10 years 10 months 24 days							10 years 9 months 18 days
Operating Segments
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		$ 12,426.2		$ 15,881.3
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance		12,695.3		13,186.2
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change						$ 0.0		$ 0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						(131.9)		(115.9)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						12,563.4		13,070.3
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		138.7		147.0
Liability for Future Policy Benefit, Expected Net Premium, Issuance		315.8		349.6
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change		3.4		(10.3)
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(393.7)		(418.8)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		12,627.6		13,137.8
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		(27.0)		1,371.4
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period		12,600.6		14,509.2
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		48,929.4		65,305.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance		49,529.9		50,251.2		49,689.0		50,397.2
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						(283.4)		(185.7)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						49,405.6		50,211.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[3]	1,131.4		1,208.1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		556.8		573.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(1,613.2)		(1,658.1)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change		49.3		(83.9)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of year		49,875.2		58,563.6
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		345.3		8,312.4
Liability for Future Policy Benefit, before Reinsurance		37,274.6		44,054.4
Liability for Future Policy Benefits		39,351.5		46,474.7
Liability for Future Policy Benefits, Other Contracts		1,849.5		2,196.7
Liability for Future Policy Benefit, before Reinsurance, after other		39,124.1		46,251.1								$ 45,704.4	[4]
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		8,148.2		9,424.6						$ 10,496.0	[5]
Liability for Future Policy Benefit, after Reinsurance		30,975.9		36,826.5						45,089.4
Unum US
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		2,071.1		2,619.1
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance		2,166.0		2,311.9
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						(98.5)		(76.2)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						2,067.5		2,235.7
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		19.3		21.2
Liability for Future Policy Benefit, Expected Net Premium, Issuance		134.5		150.1
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(82.5)		(94.0)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		2,138.8		2,313.0
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		(57.2)		106.6
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period		2,081.6		2,419.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		11,698.2		14,564.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance		11,981.2		12,600.5		12,177.3		12,671.7
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						(250.6)		(141.3)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						11,926.7		12,530.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		796.2		848.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		120.4		126.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(862.1)		(905.2)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of year		11,707.4		13,441.9
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(273.8)		841.4
Liability for Future Policy Benefit, before Reinsurance		9,625.8		11,022.3
Liability for Future Policy Benefits	[6]	9,671.3		11,093.3
Liability for Future Policy Benefits, Other Contracts		45.5		71.0
Liability for Future Policy Benefit, before Reinsurance, after other		9,671.3		11,093.3								12,184.6	[4]
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		255.8		308.2						357.7	[5]
Liability for Future Policy Benefit, after Reinsurance		9,415.5		10,785.1						12,503.7
Liability for Future Policy Benefit, Gross Premium Income		1,537.0		1,487.4
Liability for Future Policy Benefit, Interest Expense		101.1		105.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		17,632.6		17,986.6
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		9,481.2		9,720.3
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 6,864.4		$ 7,135.4
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		4.10%		4.10%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		4.50%		3.20%
Liability for Future Policy Benefit, Weighted-Average Duration		6 years 9 months 18 days		6 years 6 months
Unum International
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		$ 197.1		$ 260.5
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance		246.8		258.1
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						4.5		2.2
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						251.3		260.3
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		2.2		2.1
Liability for Future Policy Benefit, Expected Net Premium, Issuance		6.3		5.0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change		3.4		(10.3)
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(5.2)		(5.7)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		258.0		251.4
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		(38.4)		(27.2)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period		219.6		224.2
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		2,231.4		3,181.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance		2,549.5		2,640.4		2,495.5		2,703.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						2.2		15.7
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						2,497.7		2,719.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[7]	105.4		105.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		15.7		18.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(118.6)		(118.8)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of year		2,337.7		2,785.1
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(211.8)		144.7
Liability for Future Policy Benefit, before Reinsurance		2,118.1		2,560.9
Liability for Future Policy Benefits		2,148.6		2,592.1
Liability for Future Policy Benefits, Other Contracts		30.5		31.2
Liability for Future Policy Benefit, before Reinsurance, after other		2,148.6		2,592.1								2,969.8	[4]
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		74.7		101.0						132.5	[5]
Liability for Future Policy Benefit, after Reinsurance		2,073.9		2,491.1						3,070.9
Liability for Future Policy Benefit, Gross Premium Income		208.5		205.0
Liability for Future Policy Benefit, Interest Expense		13.5		15.9
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		3,988.8		4,181.4
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		995.8		902.4
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 657.2		$ 609.0
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		3.90%		3.90%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		4.80%		3.00%
Liability for Future Policy Benefit, Weighted-Average Duration		8 years 7 months 6 days		8 years 9 months 18 days
Colonial Life
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		$ 3,745.4		$ 4,597.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance		4,046.4		4,158.9
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						(46.3)		4.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						4,000.1		4,162.9
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		33.0		34.7
Liability for Future Policy Benefit, Expected Net Premium, Issuance		175.0		194.5
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(164.1)		(176.9)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		4,044.0		4,215.2
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		(229.5)		110.7
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period		3,814.5		4,325.9
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		5,581.1		7,054.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance		6,196.4		6,287.8		6,163.9		6,201.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						(39.5)		(7.3)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						6,124.4		6,194.2
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		184.9		203.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		55.4		56.7
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(168.3)		(166.5)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of year		5,735.9		6,536.6
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(460.5)		248.8
Liability for Future Policy Benefit, before Reinsurance		1,921.4		2,210.7
Liability for Future Policy Benefits		1,942.1		2,236.7
Liability for Future Policy Benefits, Other Contracts		20.7		26.0
Liability for Future Policy Benefit, before Reinsurance, after other		1,942.1		2,236.7								1,977.2	[4]
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		0.8		1.9						4.4	[5]
Liability for Future Policy Benefit, after Reinsurance		1,941.3		2,234.8						2,524.2
Liability for Future Policy Benefit, Gross Premium Income		412.2		412.6
Liability for Future Policy Benefit, Interest Expense		22.4		22.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		10,121.7		9,697.9
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		12,359.9		11,653.5
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 9,030.0		$ 8,717.0
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		4.30%		4.40%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		5.00%		3.60%
Liability for Future Policy Benefit, Weighted-Average Duration		17 years 4 months 24 days		16 years 6 months
Closed Block
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		$ 6,412.6		$ 8,404.7
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance		6,236.1		6,457.3
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						8.4		(45.9)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						6,244.5		6,411.4
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		84.2		89.0
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(141.9)		(142.2)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		6,186.8		6,358.2
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		298.1		1,181.3
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period		6,484.9		7,539.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		29,418.7		40,504.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance		28,802.8		28,722.5		28,852.3		28,820.2
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						4.5		(52.8)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						28,856.8		28,767.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		44.9		50.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		365.3		372.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(464.2)		(467.6)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of year		30,094.2		35,800.0
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		1,291.4		7,077.5
Liability for Future Policy Benefit, before Reinsurance		23,609.3		28,260.5
Liability for Future Policy Benefits		25,362.1		30,329.0
Liability for Future Policy Benefits, Other Contracts		1,752.8		2,068.5
Liability for Future Policy Benefit, before Reinsurance, after other		25,362.1		30,329.0								28,572.8	[4]
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		7,816.8		9,013.4						10,001.4	[5]
Liability for Future Policy Benefit, after Reinsurance		17,545.3		21,315.6						26,990.6
Liability for Future Policy Benefit, Gross Premium Income		232.3		240.7
Liability for Future Policy Benefit, Interest Expense		281.1		283.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		64,847.9		65,962.8
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		12,448.0		12,984.0
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 7,254.3		$ 7,445.8
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		5.20%		5.20%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		5.00%		3.60%
Liability for Future Policy Benefit, Weighted-Average Duration		12 years 3 months 18 days		12 years 7 months 6 days
Other Products
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefits		$ 227.4		$ 223.6
Group Disability | Unum US
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Issuance		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		0.0		0.0
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period		0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		5,533.3		6,725.7
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance		5,678.3		6,116.6		5,793.1		6,158.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						(107.5)		(56.4)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						5,685.6		6,101.9
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		425.3	[8]	448.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		52.2		58.3	[9]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(484.8)		(492.4)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of year		5,498.8		6,313.9
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(179.5)		197.3
Liability for Future Policy Benefit, before Reinsurance		5,498.8		6,313.9
Liability for Future Policy Benefits, Other Contracts		0.5		0.6
Liability for Future Policy Benefit, before Reinsurance, after other		5,499.3		6,314.5								7,409.0
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		42.5		58.0						58.3
Liability for Future Policy Benefit, after Reinsurance		5,456.8		6,256.5						7,237.4
Liability for Future Policy Benefit, Gross Premium Income		718.2		676.1
Liability for Future Policy Benefit, Interest Expense		52.2		58.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		6,834.2		7,396.0
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		0.0		0.0
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 0.0		$ 0.0
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		3.80%		3.90%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		4.60%		3.10%
Liability for Future Policy Benefit, Weighted-Average Duration		4 years 3 months 18 days		4 years 3 months 18 days
Group Life and AD&D | Unum US
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		$ 0.0		$ 0.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Issuance		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		0.0		0.0
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period		0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		972.6		1,124.1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance		952.4		1,006.1		998.5		1,058.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						(21.2)		(7.6)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						977.3		1,050.7
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		228.4	[8]	242.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		5.9		6.8	[9]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(259.2)		(294.2)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of year		933.6		1,030.7
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(18.8)		24.6
Liability for Future Policy Benefit, before Reinsurance		933.6		1,030.7
Liability for Future Policy Benefits, Other Contracts		0.9		0.8
Liability for Future Policy Benefit, before Reinsurance, after other		934.5		1,031.5								1,123.9
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		5.6		4.7						3.0
Liability for Future Policy Benefit, after Reinsurance		928.9		1,026.8						1,124.3
Liability for Future Policy Benefit, Gross Premium Income		462.2		460.1
Liability for Future Policy Benefit, Interest Expense		5.9		6.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		1,085.2		1,168.8
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		0.0		0.0
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 0.0		$ 0.0
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		2.20%		2.40%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		2.70%		2.00%
Liability for Future Policy Benefit, Weighted-Average Duration		2 years 8 months 12 days		3 years
Individual Disability | Unum US
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		$ 1,202.9		$ 1,494.3
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance		1,228.1		1,279.6
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						(24.9)		(22.1)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						1,203.2		1,257.5
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		12.3		13.4
Liability for Future Policy Benefit, Expected Net Premium, Issuance		48.8		48.3
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(44.7)		(45.7)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		1,219.6		1,273.5
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		(6.3)		105.8
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period		1,213.3		1,379.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		3,192.8		4,017.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance		3,230.7		3,257.1		3,244.5		3,253.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						(36.0)		(20.5)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						3,208.5		3,232.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		50.2		49.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		41.0		39.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(69.0)		(64.6)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of year		3,245.9		3,666.4
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		15.2		409.3
Liability for Future Policy Benefit, before Reinsurance		2,032.6		2,287.1
Liability for Future Policy Benefits, Other Contracts		27.5		54.4
Liability for Future Policy Benefit, before Reinsurance, after other		2,060.1		2,341.5								2,485.3
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		195.2		216.8						260.6
Liability for Future Policy Benefit, after Reinsurance		1,864.9		2,124.7						2,507.1
Liability for Future Policy Benefit, Gross Premium Income		157.3		148.4
Liability for Future Policy Benefit, Interest Expense		28.7		25.9
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		5,148.4		5,199.6
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		5,540.1		5,567.9
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 3,973.7		$ 3,953.4
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		5.10%		5.00%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		4.80%		3.40%
Liability for Future Policy Benefit, Weighted-Average Duration		9 years 4 months 24 days		9 years 6 months
Voluntary Benefits | Unum US
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		$ 868.2		$ 1,124.8
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance		937.9		1,032.3
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						(73.6)		(54.1)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						864.3		978.2
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		7.0		7.8
Liability for Future Policy Benefit, Expected Net Premium, Issuance		85.7		101.8
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(37.8)		(48.3)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		919.2		1,039.5
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		(50.9)		0.8
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period		868.3		1,040.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		1,999.5		2,697.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance		2,119.8		2,220.7		2,141.2		2,201.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						(85.9)		(56.8)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						2,055.3		2,145.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		92.3		107.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		21.3		22.1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(49.1)		(54.0)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of year		2,029.1		2,430.9
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(90.7)		210.2
Liability for Future Policy Benefit, before Reinsurance		1,160.8		1,390.6
Liability for Future Policy Benefits, Other Contracts		16.6		15.2
Liability for Future Policy Benefit, before Reinsurance, after other		1,177.4		1,405.8								1,154.9
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		12.5		28.7						35.7
Liability for Future Policy Benefit, after Reinsurance		1,164.9		1,377.1						1,623.5
Liability for Future Policy Benefit, Gross Premium Income		199.3		202.8
Liability for Future Policy Benefit, Interest Expense		14.3		14.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		4,564.8		4,222.2
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		3,941.1		4,152.4
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 2,890.7		$ 3,182.0
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		5.10%		5.10%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		5.00%		3.60%
Liability for Future Policy Benefit, Weighted-Average Duration		17 years 10 months 24 days		15 years 10 months 24 days
Other Insurance Product Line | Closed Block
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		$ 0.0		$ 0.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		0.0		0.0
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period		0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		8,218.8		10,414.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance		8,492.3		8,801.3		8,630.7		8,949.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						(8.1)		(2.3)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						8,622.6		8,947.1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		44.9	[10]	50.3	[11]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		90.6		95.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(265.8)		(291.5)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of year		8,235.9		9,454.2
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(256.4)		652.9
Liability for Future Policy Benefit, before Reinsurance		8,235.9		9,454.2
Liability for Future Policy Benefits, Other Contracts		1,727.5	[12]	2,041.2	[13]
Liability for Future Policy Benefit, before Reinsurance, after other		9,963.4		11,495.4								12,289.4
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		7,811.2		9,006.7						9,957.0
Liability for Future Policy Benefit, after Reinsurance		2,152.2		2,488.7						4,294.1
Liability for Future Policy Benefit, Gross Premium Income		57.2		65.9
Liability for Future Policy Benefit, Interest Expense		90.6		95.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		12,535.7		12,910.9
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		0.0		0.0
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 0.0		$ 0.0
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		4.60%		4.60%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		4.90%		3.50%
Liability for Future Policy Benefit, Weighted-Average Duration		7 years 4 months 24 days		7 years 3 months 18 days
Long-term Care | Closed Block
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		$ 6,412.6		$ 8,404.7
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance		6,236.1		6,457.3
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						8.4		(45.9)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						6,244.5		6,411.4
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		84.2		89.0
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(141.9)		(142.2)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		6,186.8		6,358.2
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		298.1		1,181.3
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance end of period		6,484.9		7,539.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		21,199.9		30,089.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance		20,310.5		19,921.2		20,221.6		19,870.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience						12.6		(50.5)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						$ 20,234.2		$ 19,820.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		274.7		277.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(198.4)		(176.1)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, balance end of year		21,858.3		26,345.8
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		1,547.8		6,424.6
Liability for Future Policy Benefit, before Reinsurance		15,373.4		18,806.3
Liability for Future Policy Benefits, Other Contracts		25.3		27.3
Liability for Future Policy Benefit, before Reinsurance, after other		15,398.7		18,833.6								$ 16,283.4
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		5.6		6.7						44.4
Liability for Future Policy Benefit, after Reinsurance		15,393.1		18,826.9						$ 22,696.5
Liability for Future Policy Benefit, Gross Premium Income		175.1		174.8
Liability for Future Policy Benefit, Interest Expense		190.5		188.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		52,312.2		53,051.9
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		12,448.0		12,984.0
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 7,254.3		$ 7,445.8
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		5.60%		5.50%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		5.00%		3.60%
Liability for Future Policy Benefit, Weighted-Average Duration		15 years 3 months 18 days		16 years 1 month 6 days

[1] 2We previously reported policy and contract benefits and reserves for future policy and contract benefits liabilities in our consolidated balance sheet as of March 31, 2022 of $1,874.2 million and $45,258.0 million, respectively, resulting in total policyholder liabilities of $47,132.2 million. These balances were reclassified into new line items, future policy benefits and policyholders' account balances, which would have reported balances of $41,368.2 million and $5,764.0 million, respectively, as of March 31, 2022, resulting in total policyholder liabilities of $47,132.2 million under the historical accounting method.

[2] 1We previously reported policy and contract benefits and reserves for future policy and contract benefits liabilities in our consolidated balance sheet as of December 31, 2022 of $1,839.8 million and $42,330.2 million, respectively, resulting in total policyholder liabilities of $44,170.0 million. These balances were reclassified into new line items, future policy benefits and policyholders' account balances, which would have reported balances of $38,443.2 million and $5,726.8 million, respectively, as of December 31, 2022, resulting in total policyholder liabilities of $44,170.0 million under the historical accounting method.

[3] 1Issuances include new policy issuances for most product lines. For our Unum US group disability, Unum US group life and AD&D and Closed Block - All Other product lines and certain of our Unum International product lines, this line represents new claim incurrals.

[4] 1We previously reported policy and contract benefits and reserves for future policy and contract benefits liabilities in our consolidated balance sheet as of December 31, 2020 of $1,855.4 million and $49,653.0 million, respectively, resulting in total policyholder liabilities of $51,508.4 million. These balances were reclassified into new line items, future policy benefits and policyholders' account balances, which would have reported balances of $45,704.4 million and $5,804.0 million as of December 31, 2020, respectively, resulting in total policyholder liabilities of $51,508.4 million under the historical accounting method. These balances were reclassified to more closely align with the new disclosure requirements of ASU 2018-12.

[5] 5These amounts represent the portion of reinsurance recoverable related to the liability for future policy benefits. These amounts include the adjustments for the removal of shadow adjustments and for the effect of change in discount rate assumptions for the liability for future policy benefits ceded to third party reinsurers.

[6] 1Unum US excludes dental & vision and medical stop-loss product lines and Closed Block excludes our participating fund account, which represents policies issued by one of our subsidiaries prior to its 1986 conversion from a mutual stock life insurance company. The liabilities associated with these products are included within Other products.

[7] 1Issuances for Unum International primarily represents new claim incurrals.

[8] 1Issuances include new policy issuances for most product lines. Issuances for Unum US group disability and Unum US group life and AD&D represents new claim incurrals.

[9] 1Issuances include new policy issuances for most product lines. Issuances for Unum US group disability and Unum US group life and AD&D represents new claim incurrals.

[10] 1Issuances for Closed Block - All Other represents new claim incurrals.

[11] 1Issuances for Closed Block - All Other represents new claim incurrals.

[12] 2Other for Closed Block - All Other primarily includes our closed block group pension products and certain of our ceded closed block individual life products.

[13] 2Other for Closed Block - All Other primarily includes our closed block group pension products and certain of our ceded closed block individual life products.