Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2019	Jan. 31, 2020	Jun. 29, 2019
Cover page.
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	1-1657
Entity Registrant Name	CRANE CO.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-1952290
Entity Address, Address Line One	100 First Stamford Place
Entity Address, City or Town	Stamford
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06902
City Area Code	203
Local Phone Number	363-7300
Title of 12(b) Security	Common Stock, par value $1.00
Trading Symbol	CR
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 5,002,100,003
Entity Common Stock, Shares Outstanding		59,149,706
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Central Index Key	0000025445
Current Fiscal Year End Date	--12-31