Business Segments (Geographic Information on Certain Long-Lived Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Certain Long-Lived Assets	$ 9,757.6	$ 8,220.0	$ 8,316.2
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Certain Long-Lived Assets	6,634.3	5,050.5	5,121.6
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Certain Long-Lived Assets	1,644.6	1,635.9	1,451.4
Malaysia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Certain Long-Lived Assets	1,325.4	1,392.3	1,637.0
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Certain Long-Lived Assets	$ 153.3	$ 141.3	$ 106.2