Accounting Pronouncements (Details) - USD ($) $ in Millions		Mar. 31, 2019	Jan. 01, 2019
Accounting Pronouncements [Abstract]
Operating Lease, Right-of-Use Asset	[1]	$ 44.1	$ 34.5
Operating Lease, Liability	[2]	$ 48.8	$ 39.1

[1] Included in Property, Plant and Equipment in the 2019 Condensed Consolidated Balance Sheet.

[2] Included in Other Deferred Credits and Other Liabilities in the 2019 Condensed Consolidated Balance Sheet.