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Debt and Borrowing Arrangements - Short-Term Borrowings and Related Weighted-Average Interest Rates (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Short-term Debt [Line Items]    
Amount Outstanding $ 234 $ 29
Commercial paper    
Short-term Debt [Line Items]    
Amount Outstanding $ 184 $ 0
Weighted-Average Rate 0.10% 0.00%
Bank loans    
Short-term Debt [Line Items]    
Amount Outstanding $ 50 $ 29
Weighted-Average Rate 8.60% 4.80%