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Income Taxes (Summary Of Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]        
Gross unrecognized tax benefits $ 316.4 $ 328.2 $ 388.5 $ 396.2
Unrecognized tax benefits, net of tax impacts in other jurisdictions 293.1 302.4 359.6  
Interest and penalties related to uncertain tax positions 42.8 43.6 53.3  
Interest and penalties recognized in the consolidated statements of income $ 5.3 $ 7.7 $ (1.5)