Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

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Investments - Net Investment Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	$ 412	$ 399
Less: investment expense	18	17
Net investment income	394	382
Fixed maturities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	352	323
Investments in fixed maturities that did not produce net income	1		$ 1
Equity securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	2	1
Mortgage loans on real estate
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	54	53
Policy loans
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	2	2
Short-term investments and cash equivalents
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	1	1
Other
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Gross investment income	$ 1	$ 19