Property and Equipment (Schedule of Geographic Information) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Long-lived assets	$ 8,808.5	$ 8,546.2
U.S. and Puerto Rico
Property, Plant and Equipment [Line Items]
Long-lived assets	5,595.4	5,425.0
Ireland
Property, Plant and Equipment [Line Items]
Long-lived assets	1,454.8	1,351.3
Other foreign countries
Property, Plant and Equipment [Line Items]
Long-lived assets	$ 1,758.3	$ 1,769.9