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Consolidated Balance Sheets (Parenthetical) $ in Millions	Sep. 30, 2021 USD ($) shares	Sep. 30, 2021 SFr / shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2020 SFr / shares
Allowance for credit losses | $	$ 119		$ 126
Common stock, par or stated value per share | SFr / shares		SFr 0.10		SFr 0.10
Ordinary shares, authorized	2,495,000,000		2,495,000,000
Ordinary shares, issued	1,209,000,000		1,202,000,000
Treasury shares	106,000,000		106,000,000

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

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