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CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Amortized cost of investments	$ 21,468.5	$ 19,810.0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	700,000,000	600,000,000
Common stock, shares issued (in shares)	508,000,000	468,000,000
Common stock, shares outstanding (in shares)	508,000,000	468,000,000

X

- Definition

Face amount or stated value per share of common stock.

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-Topic 210
-SubTopic 10
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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Cost of the investment.

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