Variable Interest Entities (Narrative) (Details) - USD ($)		Mar. 31, 2020		Dec. 31, 2019
Variable Interest Entity [Line Items]
Total liabilities		$ 812,640,000,000		$ 832,833,000,000
Other invested assets	[2]	18,071,000,000	[1]	15,606,000,000
Other Unconsolidated VIEs
Variable Interest Entity [Line Items]
Total liabilities		0
Other Unconsolidated VIEs | Fixed maturities, available-for-sale, Fixed maturities, trading, Equity securities and Other invested assets
Variable Interest Entity [Line Items]
Maximum exposure to loss resulting from investment in unconsolidated VIEs		824,000,000		1,021,000,000
LPs/LLCs
Variable Interest Entity [Line Items]
Other invested assets		11,288,000,000		11,157,000,000
LPs/LLCs | VIEs and Non-VIEs
Variable Interest Entity [Line Items]
Other invested assets		$ 11,288,000,000		$ 11,157,000,000

[1] March 31, 2020 amounts include the impacts of the January 1, 2020 adoption of ASU 2016-13. See Note 2 for details.

[2] See Note 4 for details of balances associated with variable interest entities.