Financing Arrangements - Notes Payable (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Notes payable	$ 12	$ 12
Short-term borrowings due to banks
Short-term Debt [Line Items]
Notes payable	$ 12	$ 12

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Balance Type:	credit
Period Type:	instant