Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Sep. 30, 2021
Statement Of Financial Position [Abstract]
Accounts receivable net of allowances	$ 4	$ 3
Preferred stock no par value	$ 0.0001	$ 0.0001
Preferred Shares authorized	7,000,000	7,000,000
Preferred Shares issued	4,000,000	4,000,000
Preferred Shares outstanding	4,000,000	4,000,000
Common stock no par value	$ 0.0001	$ 0.0001
Common shares authorized	500,000,000	500,000,000
Common shares issued	168,000,000	224,000,000
Dividends declared in common shares	12,000,000

Amount of allowance for credit loss on accounts receivable, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Number of shares of common stock issued as dividends during the period. Excludes stock splits.

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