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Income Tax (Provision for Income Tax Expense) (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Income Tax Disclosure [Abstract]        
Effective Income Tax Rate Reconciliation, Percent 34.30% 25.50% 27.30% 26.30%