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Consolidated Balance Sheets (Parenthetical)	Dec. 31, 2021 $ / shares shares	Dec. 31, 2020 $ / shares shares	Dec. 31, 2020 £ / shares shares
Common shares, par value | $ / shares	$ 0.01
Common shares, shares issued	75,000,000
Common Stock, Shares Authorized	700,000,000
Treasury shares, shares held		6,600,000	6,600,000
Class A Ordinary Shares, U.S. [Member]
Common shares, par value | $ / shares		$ 0.40
Common shares, shares issued		206,100,000	206,100,000
Common Class B, Par Value In GBP [Member]
Common shares, par value | £ / shares			£ 1
Common shares, shares issued		50,000,000,000	50,000,000,000
Preferred Stock
Common shares, par value | $ / shares	$ 0.01
Common shares, shares issued	0
Common Stock, Shares Authorized	150,000,000

X

- Definition

Face amount or stated value per share of common stock.

+ References

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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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 common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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