Accounting Pronouncement (Details) - USD ($) $ in Millions	Dec. 31, 2019		Jan. 01, 2019
Accounting Pronouncement Details [Abstract]
Operating Lease, Right-of-Use Asset	$ 39.6	[1]	$ 32.3
Operating Lease, Liability	$ 44.3	[2]	$ 36.9

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

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