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Investments - Net Investment Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net Investment Income [Line Items]
Investment expenses	$ (71)	$ (83)	$ (77)
Total net investment income	1,846	1,951	1,780
Total fixed maturities
Net Investment Income [Line Items]
Gross investment income	1,442	1,559	1,459
Equity securities
Net Investment Income [Line Items]
Gross investment income	39	46	32
Mortgage loans
Net Investment Income [Line Items]
Gross investment income	172	165	141
Limited partnerships and other alternative investments
Net Investment Income [Line Items]
Gross investment income	222	232	205
Other investments
Net Investment Income [Line Items]
Gross investment income	$ 42	$ 32	$ 20

X

- Definition

Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

+ References

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Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

+ References

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