Property and Equipment (Schedule of Geographic Information) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Long-lived assets	$ 9,648.2	$ 8,808.5
U.S. and Puerto Rico
Property, Plant and Equipment [Line Items]
Long-lived assets	6,113.6	5,595.4
Ireland
Property, Plant and Equipment [Line Items]
Long-lived assets	1,786.9	1,454.8
Other foreign countries
Property, Plant and Equipment [Line Items]
Long-lived assets	$ 1,747.7	$ 1,758.3