Liabilities for Unpaid Claims and Claims Expenses (Tables)

9 Months Ended

Sep. 30, 2018

Group Disability and Life, Global Supplemental Beneftits and Other Operations [Member]

Liability For Unpaid Claims And Claims Adjustment Expense [Line Items]

Liability balance details

(In millions)	September 30, 2018		September 30, 2017
Group Disability and Life	$	4,584	$	4,442
Global Supplemental Benefits		496		453
Other Operations		179		182
Unpaid claims and claim expenses	$	5,259	$	5,077

Group Disability and Life and Global Supplemental Benefits [Member]

Liability For Unpaid Claims And Claims Adjustment Expense [Line Items]

Liability balance details

	Nine Months Ended
(In millions)	September 30, 2018		September 30, 2017
Beginning balance	$	4,975	$	4,726
Less: Reinsurance		137		121
Beginning balance, net		4,838		4,605
Incurred claims related to:
Current year		3,590		3,290
Prior years:
Interest accretion		115		119
All other incurred		(130)		(59)
Total incurred		3,575		3,350
Paid claims related to:
Current year		2,060		1,880
Prior years		1,390		1,327
Total paid		3,450		3,207
Foreign currency		(16)		13
Ending balance, net		4,947		4,761
Add: Reinsurance		133		134
Ending balance	$	5,080	$	4,895