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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended					3 Months Ended
	Mar. 31, 2020	Nov. 30, 2019	Aug. 31, 2019	May 31, 2019	Mar. 31, 2019	May 02, 2020	May 04, 2019
Summary of Significant Accounting Policies [Line Items]
Operating lease assets obtained in exchange for new operating lease liabilities						$ 165.0	$ 207.8
Cash dividends declared per share (in dollars per share)	$ 0.285	$ 0.255	$ 0.255	$ 0.255	$ 0.255		$ 0.255
Property, Plant and Equipment
Summary of Significant Accounting Policies [Line Items]
Property and equipment purchased but not yet paid						$ 34.5	$ 14.8