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Leases, Other supplemental data related to operating leases (Details)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
Leases  
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 86.0
Right-of-use assets obtained in exchange for lease liabilities $ 98.6
Weighted Average Remaining Lease Term 6 years
Weighted Average Discount Rate 3.20%