Investments - OTTI losses by asset type (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Realized capital gains and losses by asset type
Gross	$ (16)	$ (4)	$ (44)	$ (8)
Included in OCI	2	(1)	1	(2)
Net	(14)	(5)	(43)	(10)
Municipal
Realized capital gains and losses by asset type
Gross	(2)	0	(2)	0
Included in OCI	2	0	2	0
Net	0	0	0	0
Corporate
Realized capital gains and losses by asset type
Gross	0	0	(5)	0
Included in OCI	0	0	(2)	0
Net	0	0	(7)	0
Asset-backed securities (“ABS”)
Realized capital gains and losses by asset type
Gross	0	0	(3)	(1)
Included in OCI	0	(1)	0	(1)
Net	0	(1)	(3)	(2)
Residential mortgage-backed securities (“RMBS”)
Realized capital gains and losses by asset type
Gross	0	0	0	(1)
Included in OCI	0	0	(1)	0
Net	0	0	(1)	(1)
Commercial mortgage-backed securities (“CMBS”)
Realized capital gains and losses by asset type
Gross	(1)	(2)	(3)	(2)
Included in OCI	0	0	2	(1)
Net	(1)	(2)	(1)	(3)
Fixed income securities
Realized capital gains and losses by asset type
Gross	(3)	(2)	(13)	(4)
Included in OCI	2	(1)	1	(2)
Net	(1)	(3)	(12)	(6)
Limited partnership interests
Realized capital gains and losses by asset type
Gross	(1)	(2)	(4)	(3)
Included in OCI	0	0	0	0
Net	(1)	(2)	(4)	(3)
Other
Realized capital gains and losses by asset type
Gross	(12)	0	(27)	(1)
Included in OCI	0	0	0	0
Net	$ (12)	$ 0	$ (27)	$ (1)

The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 8A
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Amount before tax of other than temporary impairment loss (OTTI) on investments in available-for-sale and held-to-maturity debt securities, recognized in other comprehensive loss and attributable to parent entity.

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