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Income Taxes, Unrecognized tax benefits (Details)
$ in Millions
Jun. 30, 2019
USD ($)
Reconciliation of the gross amounts of unrecognized tax benefits  
Liability for unrecognized tax benefits, including penalties and interest, which if recognized would impact the effective tax rate $ 140.3
Unrecognized tax benefits, anticipated adjustment for changing facts and circumstances, over the next twelve month period $ 41.8