Nature of Operations and Significant Accounting Policies (Goodwill) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) segment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Goodwill [Line Items]
Goodwill	$ 1,609.0	$ 1,472.4	$ 1,403.7
Goodwill, Foreign Currency Translation Gain (Loss)	24.9	5.3
Goodwill, Acquired During Period	106.1	63.4
Goodwill, Purchase Accounting Adjustments	$ 5.6
Number of reporting units | segment	7
Estimated cost of capital, maximum	11.50%
Estimated cost of capital, minimum	9.50%
Estimated cost of capital, weighted	10.50%
Crane Currency [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period		54.7
Crane Currency [Member]
Goodwill [Line Items]
Goodwill, Acquired During Period		8.7
Fluid Handling
Goodwill [Line Items]
Goodwill	$ 360.0	240.9	240.8
Goodwill, Foreign Currency Translation Gain (Loss)	13.0	0.1
Goodwill, Acquired During Period	106.1	0.0
Payment & Merchandising Technologies
Goodwill [Line Items]
Goodwill	875.2	857.8	789.2
Goodwill, Foreign Currency Translation Gain (Loss)	11.8	5.2
Goodwill, Acquired During Period	0.0	63.4
Goodwill, Purchase Accounting Adjustments	5.6
Aerospace & Electronics
Goodwill [Line Items]
Goodwill	202.5	202.4	202.4
Goodwill, Foreign Currency Translation Gain (Loss)	0.1	0.0
Goodwill, Acquired During Period	0.0	0.0
Engineered Materials
Goodwill [Line Items]
Goodwill	171.3	171.3	$ 171.3
Goodwill, Foreign Currency Translation Gain (Loss)	0.0	0.0
Goodwill, Acquired During Period	$ 0.0	$ 0.0