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Income Taxes (Tables)
9 Months Ended
Sep. 30, 2021
Income Tax Disclosure [Abstract]  
Schedule of Effective Tax Rate
The effective tax rate is as follows:
 Three Months Ended September 30,Nine Months Ended September 30,
In millions2021202020212020
Effective tax rate10.5 %90.0 %24.0 %559.3 %