Liability for Future Policy Benefit Activity (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2026		Jun. 30, 2025		Dec. 31, 2025	Dec. 31, 2024
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Future Policy Benefits		$ 37,610.7				$ 38,017.0
Operating Segments
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		14,416.5		$ 13,930.6
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of period		14,393.0		14,266.9
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						(285.7)	(191.5)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						14,107.3	14,075.4
Liability for Future Policy Benefit, Expected Net Premium, Issuance		747.2		697.7
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		321.5		323.1
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(891.0)		(852.7)
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change		(17.7)		47.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		14,267.3		14,290.5
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		(165.9)		(125.3)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change		14,101.4		14,165.2
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		50,683.1		48,920.1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, beginning of period		51,638.5		50,778.2
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						(209.5)	(267.2)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						$ 51,429.0	$ 50,511.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[1]	2,040.0		1,951.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		1,157.0		1,136.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(2,980.6)		(2,915.4)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change		(67.4)		284.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, end of period		51,578.0		50,968.5
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(1,547.0)		(1,382.5)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, end of year		50,031.0		49,586.0
Liability for Future Policy Benefit, before Reinsurance, before Other		35,929.6		35,420.8
Liability for Future Policy Benefit, Other	[2]	1,497.8		1,558.5
Liability for Future Policy Benefit, before Reinsurance, after Other		37,427.4		36,979.3
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		9,896.9		6,791.9
Liability for Future Policy Benefit, after Reinsurance		27,530.5		30,187.4
Liability for Future Policy Benefit, Gross Premium Income		5,516.6		5,233.9
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		835.5		813.7
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		101,513.9		102,952.0
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		39,698.9		39,814.8
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 26,351.3		$ 26,214.6
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		5.00%		4.90%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		5.30%		5.20%		5.10%	5.30%
Liability for Future Policy Benefit, Weighted-Average Duration		11 years		11 years 3 months 18 days
Future Policy Benefits		$ 37,610.7		$ 37,182.9
Unum US
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		2,622.0		2,442.7
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of period		2,679.8		2,566.0
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						(45.0)	(101.2)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						2,634.8	2,464.8
Liability for Future Policy Benefit, Expected Net Premium, Issuance		417.5		405.5
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		52.4		49.8
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(225.0)		(204.2)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		2,879.7		2,715.9
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		(86.9)		(80.9)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change		2,792.8		2,635.0
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		11,067.3		11,030.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, beginning of period		11,365.9		11,565.8
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						(106.2)	(195.6)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						11,259.7	11,370.2
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		1,407.1		1,394.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		211.2		216.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(1,372.0)		(1,369.3)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, end of period		11,506.0		11,611.2
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(416.4)		(395.5)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, end of year		11,089.6		11,215.7
Liability for Future Policy Benefit, before Reinsurance, before Other		8,296.8		8,580.7
Liability for Future Policy Benefit, Other		32.1		30.9
Liability for Future Policy Benefit, before Reinsurance, after Other		8,328.9		8,611.6
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		418.1		115.9
Liability for Future Policy Benefit, after Reinsurance		7,910.8		8,495.7
Liability for Future Policy Benefit, Gross Premium Income		3,589.3		3,403.1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		158.8		166.2
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		17,718.4		17,777.4
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		12,746.8		12,149.6
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 8,586.0		$ 8,275.0
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		4.40%		4.40%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		4.80%		4.60%
Liability for Future Policy Benefit, Weighted-Average Duration		7 years		7 years 1 month 6 days
Future Policy Benefits	[3]	$ 8,328.9		$ 8,611.6
Unum International
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		352.8		276.1
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of period		378.0		314.2
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						(0.9)	2.1
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						377.1	316.3
Liability for Future Policy Benefit, Expected Net Premium, Issuance		20.0		17.7
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		7.2		6.5
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(17.9)		(16.1)
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change		(17.7)		47.0
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		368.7		371.4
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		(24.8)		(34.2)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change		343.9		337.2
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		2,699.0		2,391.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, beginning of period		2,923.4		2,641.5
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						3.9	1.8
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						2,927.3	2,643.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[4]	259.5		212.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		39.8		36.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(260.5)		(243.4)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change		(67.4)		284.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, end of period		2,898.7		2,933.2
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(253.3)		(243.6)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, end of year		2,645.4		2,689.6
Liability for Future Policy Benefit, before Reinsurance, before Other		2,301.5		2,352.4
Liability for Future Policy Benefit, Other		49.3		50.1
Liability for Future Policy Benefit, before Reinsurance, after Other		2,350.8		2,402.5
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		85.9		73.1
Liability for Future Policy Benefit, after Reinsurance		2,264.9		2,329.4
Liability for Future Policy Benefit, Gross Premium Income		584.4		506.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		32.6		29.9
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		4,686.3		4,760.1
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		1,641.3		1,562.1
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 1,013.8		$ 982.5
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		4.10%		4.10%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		5.10%		4.90%
Liability for Future Policy Benefit, Weighted-Average Duration		8 years 8 months 12 days		8 years 10 months 24 days
Future Policy Benefits		$ 2,350.8		$ 2,402.5
Colonial Life
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		3,709.0		3,553.3
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of period		3,850.9		3,793.8
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						(22.8)	5.9
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						3,828.1	3,799.7
Liability for Future Policy Benefit, Expected Net Premium, Issuance		309.7		274.5
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		73.0		72.1
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(326.5)		(319.5)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		3,884.3		3,826.8
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		(176.4)		(180.1)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change		3,707.9		3,646.7
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		5,710.4		5,434.9
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, beginning of period		6,179.4		6,026.2
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						(43.2)	(5.5)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						6,136.2	6,020.7
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		331.2		295.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		122.6		119.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(331.1)		(327.5)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, end of period		6,258.9		6,108.4
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(519.7)		(516.6)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, end of year		5,739.2		5,591.8
Liability for Future Policy Benefit, before Reinsurance, before Other		2,031.3		1,945.1
Liability for Future Policy Benefit, Other		29.6		23.8
Liability for Future Policy Benefit, before Reinsurance, after Other		2,060.9		1,968.9
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		1.4		1.1
Liability for Future Policy Benefit, after Reinsurance		2,059.5		1,967.8
Liability for Future Policy Benefit, Gross Premium Income		919.5		888.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		49.6		47.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		11,363.5		10,685.1
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		13,462.5		12,887.4
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 9,456.5		$ 9,187.4
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		4.40%		4.40%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		5.40%		5.30%
Liability for Future Policy Benefit, Weighted-Average Duration		17 years 6 months		17 years 2 months 12 days
Future Policy Benefits		$ 2,060.9		$ 1,968.9
Closed Block
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		7,732.7		7,658.5
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of period		7,484.3		7,592.9
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						(217.0)	(98.3)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						7,267.3	7,494.6
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		188.9		194.7
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(321.6)		(312.9)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		7,134.6		7,376.4
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		122.2		169.9
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change		7,256.8		7,546.3
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		31,206.4		30,063.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, beginning of period		31,169.8		30,544.7
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						(64.0)	(67.9)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						31,105.8	30,476.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		42.2		49.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		783.4		764.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(1,017.0)		(975.2)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, end of period		30,914.4		30,315.7
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(357.6)		(226.8)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, end of year		30,556.8		30,088.9
Liability for Future Policy Benefit, before Reinsurance, before Other		23,300.0		22,542.6
Liability for Future Policy Benefit, Other		1,386.8		1,453.7
Liability for Future Policy Benefit, before Reinsurance, after Other		24,686.8		23,996.3
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		9,391.5		6,601.8
Liability for Future Policy Benefit, after Reinsurance		15,295.3		17,394.5
Liability for Future Policy Benefit, Gross Premium Income		423.4		435.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		594.5		570.1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		67,745.7		69,729.4
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		11,848.3		13,215.7
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 7,295.0		$ 7,769.7
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		5.30%		5.30%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		5.50%		5.50%
Liability for Future Policy Benefit, Weighted-Average Duration		12 years 1 month 6 days		12 years 8 months 12 days
Future Policy Benefits	[3]	$ 24,686.8		$ 23,996.3
Other Products [Member]
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Future Policy Benefits	[3]	183.3		203.6
Group Disability | Unum US
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
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, balance at beginning of period		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, Issuance		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		0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		4,588.1		4,735.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, beginning of period		4,656.9		4,907.5
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						(29.4)	(63.7)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						4,627.5	4,843.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		710.1	[5]	697.5	[6]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		72.1		78.9
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(792.5)		(783.8)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, end of period		4,617.2		4,836.4
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(114.8)		(112.0)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, end of year		4,502.4		4,724.4
Liability for Future Policy Benefit, before Reinsurance, before Other		4,502.4		4,724.4
Liability for Future Policy Benefit, Other		0.1		0.2
Liability for Future Policy Benefit, before Reinsurance, after Other		4,502.5		4,724.6
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		23.3		25.3
Liability for Future Policy Benefit, after Reinsurance		4,479.2		4,699.3
Liability for Future Policy Benefit, Gross Premium Income		1,646.5		1,574.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		72.1		78.9
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		5,569.3		5,839.5
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		4.30%		4.20%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		4.70%		4.60%
Liability for Future Policy Benefit, Weighted-Average Duration		3 years 10 months 24 days		4 years
Group Life and AD&D | Unum US
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
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, balance at beginning of period		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, Issuance		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		0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		801.6		835.2
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, beginning of period		807.5		852.6
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						(27.3)	(20.3)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						780.2	832.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		260.9	[5]	269.5	[6]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		8.5		9.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(266.8)		(300.6)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, end of period		782.8		810.2
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(10.8)		(10.7)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, end of year		772.0		799.5
Liability for Future Policy Benefit, before Reinsurance, before Other		772.0		799.5
Liability for Future Policy Benefit, Other		0.8		0.8
Liability for Future Policy Benefit, before Reinsurance, after Other		772.8		800.3
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		6.8		5.4
Liability for Future Policy Benefit, after Reinsurance		766.0		794.9
Liability for Future Policy Benefit, Gross Premium Income		1,118.5		1,048.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		8.5		9.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		886.3		921.0
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		2.50%		2.40%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		2.80%		2.70%
Liability for Future Policy Benefit, Weighted-Average Duration		2 years 4 months 24 days		2 years 6 months
Individual Disability | Unum US
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		$ 1,236.5		$ 1,202.5
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of period		1,232.5		1,230.7
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						(9.2)	(39.0)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						1,223.3	1,191.7
Liability for Future Policy Benefit, Expected Net Premium, Issuance		82.5		117.6
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		25.9		25.7
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(94.9)		(91.4)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		1,236.8		1,243.6
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		(11.7)		(7.4)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change		1,225.1		1,236.2
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		3,140.7		3,096.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, beginning of period		3,150.4		3,191.1
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						(11.3)	(48.0)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						3,139.1	3,143.1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		86.7		124.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		72.7		73.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(147.4)		(145.6)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, end of period		3,151.1		3,195.0
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(52.5)		(42.8)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, end of year		3,098.6		3,152.2
Liability for Future Policy Benefit, before Reinsurance, before Other		1,873.5		1,916.0
Liability for Future Policy Benefit, Other		26.3		27.1
Liability for Future Policy Benefit, before Reinsurance, after Other		1,899.8		1,943.1
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		375.3		72.1
Liability for Future Policy Benefit, after Reinsurance		1,524.5		1,871.0
Liability for Future Policy Benefit, Gross Premium Income		345.6		339.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		46.8		47.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		5,076.4		5,148.8
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		5,818.2		5,820.4
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 4,192.8		$ 4,182.1
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		5.10%		5.10%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		5.20%		5.00%
Liability for Future Policy Benefit, Weighted-Average Duration		9 years 3 months 18 days		9 years 6 months
Voluntary Benefits | Unum US
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		$ 1,385.5		$ 1,240.2
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of period		1,447.3		1,335.3
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						(35.8)	(62.2)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						1,411.5	1,273.1
Liability for Future Policy Benefit, Expected Net Premium, Issuance		335.0		287.9
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		26.5		24.1
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(130.1)		(112.8)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		1,642.9		1,472.3
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		(75.2)		(73.5)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change		1,567.7		1,398.8
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		2,536.9		2,362.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, beginning of period		2,751.1		2,614.6
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						(38.2)	(63.6)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						2,712.9	2,551.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		349.4		303.3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		57.9		54.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(165.3)		(139.3)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, end of period		2,954.9		2,769.6
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(238.3)		(230.0)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, end of year		2,716.6		2,539.6
Liability for Future Policy Benefit, before Reinsurance, before Other		1,148.9		1,140.8
Liability for Future Policy Benefit, Other		4.9		2.8
Liability for Future Policy Benefit, before Reinsurance, after Other		1,153.8		1,143.6
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		12.7		13.1
Liability for Future Policy Benefit, after Reinsurance		1,141.1		1,130.5
Liability for Future Policy Benefit, Gross Premium Income		478.7		440.9
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		31.4		30.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		6,186.4		5,868.1
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		6,928.6		6,329.2
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 4,393.2		$ 4,092.9
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		5.00%		5.00%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		5.60%		5.50%
Liability for Future Policy Benefit, Weighted-Average Duration		18 years 1 month 6 days		18 years 2 months 12 days
Other Insurance Product Line | Closed Block
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
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, balance at beginning of period		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		0.0		0.0
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		6,785.8		7,138.4
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, beginning of period		7,056.2		7,591.0
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						(11.2)	(22.5)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						7,045.0	7,568.5
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance		42.2	[7]	49.3	[8]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		153.7		165.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(425.6)		(458.8)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, end of period		6,815.3		7,324.0
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(355.6)		(338.9)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, end of year		6,459.7		6,985.1
Liability for Future Policy Benefit, before Reinsurance, before Other		6,459.7		6,985.1
Liability for Future Policy Benefit, Other		1,382.5	[9]	1,452.8	[10]
Liability for Future Policy Benefit, before Reinsurance, after Other		7,842.2		8,437.9
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		6,141.1		6,598.2
Liability for Future Policy Benefit, after Reinsurance		1,701.1		1,839.7
Liability for Future Policy Benefit, Gross Premium Income		69.8		83.6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		153.7		165.0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		9,854.3		10,667.0
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		4.60%		4.60%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		5.30%		5.20%
Liability for Future Policy Benefit, Weighted-Average Duration		7 years		7 years 2 months 12 days
Long-term Care | Closed Block
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change, balance beginning of year		$ 7,732.7		$ 7,658.5
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at beginning of period		7,484.3		7,592.9
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						(217.0)	(98.3)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change						7,267.3	7,494.6
Liability for Future Policy Benefit, Expected Net Premium, Interest Income		188.9		194.7
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected		(321.6)		(312.9)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance, balance at end of period		7,134.6		7,376.4
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax		122.2		169.9
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change		7,256.8		7,546.3
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, beginning of year		24,420.6		22,925.2
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, beginning of period		24,113.6		22,953.7
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						(52.8)	(45.4)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change						$ 24,060.8	$ 22,908.3
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		629.7		599.8
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment		(591.4)		(516.4)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance, end of period		24,099.1		22,991.7
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax		(2.0)		112.1
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change, end of year		24,097.1		23,103.8
Liability for Future Policy Benefit, before Reinsurance, before Other		16,840.3		15,557.5
Liability for Future Policy Benefit, Other		4.3		0.9
Liability for Future Policy Benefit, before Reinsurance, after Other		16,844.6		15,558.4
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance		3,250.4		3.6
Liability for Future Policy Benefit, after Reinsurance		13,594.2		15,554.8
Liability for Future Policy Benefit, Gross Premium Income		353.6		352.2
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense		440.8		405.1
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance		57,891.4		59,062.4
Liability for Future Policy Benefit, Expected Future Gross Premium, Undiscounted, before Reinsurance		11,848.3		13,215.7
Liability for Future Policy Benefit, Expected Future Gross Premium, Discounted, before Reinsurance		$ 7,295.0		$ 7,769.7
Liability for Future Policy Benefit, Weighted-Average Interest Accretion Rate		5.60%		5.60%
Liability for Future Policy Benefit, Current Weighted-Average Discount Rate		5.60%		5.60%
Liability for Future Policy Benefit, Weighted-Average Duration		14 years 2 months 12 days		15 years 3 months 18 days
Liability for Future Policy Benefit, Adverse Development, Expense		$ 63.6		$ (26.4)

[1] 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.

[2] 2Other primarily relates to our Closed Block - All Other product line.

[3] 1Unum US excludes the dental and vision product line and medical stop-loss products, Unum International excludes certain products in our supplemental product line and Closed Block excludes our participating fund account, which represents policies issued by one of our subsidiaries prior to its conversion from a mutual stock life insurance company. The liabilities associated with these products are included within Other products.

[4] 1Issuances for Unum International primarily represent new claim incurrals.

[5] 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.

[6] 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.

[7] 1Issuances for Closed Block - All Other represents new claim incurrals.

[8] 1Issuances for Closed Block - All Other represents new claim incurrals.

[9] 2Other for Closed Block - All Other primarily includes our closed block group pension products and certain of our ceded closed block individual life products.

[10] 2Other for Closed Block - All Other primarily includes our closed block group pension products and certain of our ceded closed block individual life products.