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Supplemental Disclosures of Cash Flow (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Supplemental Disclosures of Cash Flow Data [Abstract]
Interest paid	$ 283	$ 281	$ 281
Income taxes paid (received)	22	260	90
Significant non-cash investing and financing transactions:
Equity securities received in exchange of fixed maturity AFS securities	$ 19
Reduction of other investments in connection with the expiration of a repurchase agreement		$ (150)
Investments received in financing transactions			$ 263

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The total value of stock received in a non-cash transaction from stock options exercised through stock swap transactions

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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Amount of assets, classified as other, acquired in a noncash or part noncash acquisition.

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Value of investments transferred from the entity's investments in noncash transactions.

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