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Stock-Based Compensation Plans (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
	Apr. 03, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2018	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)		511,000	0	0
Stock-based compensation expense	$ 0.0
Total net cash received from option exercises		$ 4.4	$ 0.0	$ 0.0
Total cash received from option exercises		32.5	135.0	298.1
Tax benefit realized for tax deductions from option exercises		0.4	0.3	1.8
Total future compensation costs related to unvested share-based awards		3.0
Tax benefit for vesting of restricted share units		0.9	0.8	1.9
Performance-Based Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Modification liability		$ 1.9
Vesting period		3 years
Maximum payout potential if shareholder return is negative (percent)		100.00%
Performance-Based Restricted Share Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout potential (percent)		0.00%
Performance-Based Restricted Share Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout potential (percent)		200.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 4.8	1.9	2.0
Vesting period		4 years
Options expiration period		10 years
Historical volatility period		4 years
Total cash received from option exercises			1.6	1.5
Total future compensation costs related to awards, weighted-average period		2 years 6 months
Stock Options \| Share-Based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Stock Options \| Share-Based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Stock Options \| Share-Based Payment Arrangement, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Stock Options \| Share-Based Payment Arrangement, Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		4 years
Tax benefit for vesting of restricted share units		$ 0.5	0.5	0.1
Restricted Share Units \| Share-Based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Restricted Share Units \| Share-Based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Restricted Share Units \| Share-Based Payment Arrangement, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Restricted Share Units \| Share-Based Payment Arrangement, Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage		25.00%
Restricted Share Units and Performance-Based Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense		$ 5.5	$ 7.4	$ 6.6
Total future compensation costs related to awards, weighted-average period		2 years 29 days
Total future compensation costs related to restricted share unit and performance-based restricted share unit awards		$ 10.2
Crane NXT, Co. Stock-Based Compensation Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	500,000
SpinCo Stock-Based Compensation Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)	600,000
SpinCo Stock-Based Compensation Awards \| Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Further awards to be made (in shares)		611,932
SpinCo Stock-Based Compensation Awards \| Restricted Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Further awards to be made (in shares)		190,900
2013 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock authorized (in shares)						9,500,000
Further awards to be made (in shares)		0
2018 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock authorized (in shares)					6,500,000
Further awards to be made (in shares)		0
2021 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock authorized (in shares)				4,710,000