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Long-Term Debt And Notes Payable (Narrative) (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Jan. 10, 2018
EUR (€)
Jan. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2013
USD ($)
Nov. 30, 2006
USD ($)
Jun. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2018
EUR (€)
Feb. 05, 2018
USD ($)
Mar. 31, 2013
USD ($)
Debt Instrument [Line Items]                    
Line of Credit Facility, Amended Maximum Borrowing Capacity                   $ 500,000,000
Long-term debt     $ 494,100,000       $ 942,300,000      
Total debt to capitalization ratio             0.38 0.38    
4.45% Notes Due 2023 [Member]                    
Debt Instrument [Line Items]                    
Notes issued, term       10 years            
Notes issued       $ 300,000,000            
Debt instrument interest rate     4.45%              
Long-term Debt     $ 298,400,000       $ 298,600,000      
Percentage of principal amount Company may be required to buy back at       101.00%            
Annualized interest rate including debt issuance cost amortization             4.56% 4.56%    
2.75% Notes Due 2018 [Member]                    
Debt Instrument [Line Items]                    
Notes issued       $ 250,000,000            
Debt instrument interest rate     2.75%              
Debt Instrument, Face Amount     $ 250,000,000              
6.55% Notes Due 2036 [Member]                    
Debt Instrument [Line Items]                    
Notes issued, term         30 years          
Notes issued         $ 200,000,000          
Debt instrument interest rate         6.55%          
Long-term Debt     $ 198,100,000       $ 198,200,000      
Percentage of principal amount Company may be required to buy back at         101.00%          
Annualized interest rate including debt issuance cost amortization             6.67% 6.67%    
2017 Facility [Member] | Minimum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Covenant, Debt to Capital Ratio             0.65 0.65    
2017 Facility [Member] | Maximum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Covenant, Debt to Capital Ratio             1.00 1.00    
Building Loan Facility [Member]                    
Debt Instrument [Line Items]                    
Line of Credit Facility, Maximum Borrowing Capacity | € € 27,000,000                  
Long-term Line of Credit | € € 22,400,000             € 23,300,000    
Line of Credit Facility, Interest Rate During Period 1.50%                  
Line of Credit Facility, Periodic Payment | € € 400,000                  
Base Rate [Member] | 2017 Facility [Member] | Minimum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate             0.00%      
Base Rate [Member] | 2017 Facility [Member] | Maximum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate             0.50%      
Base Rate [Member] | 364 Day Credit Agreement [Member] | Minimum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate     0.00%       0.00%      
Base Rate [Member] | 364 Day Credit Agreement [Member] | Maximum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate     0.75%       0.75%      
Base Rate [Member] | 3 Year Term Loan Agreement [Member] | Minimum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate     0.00%       0.07%      
Base Rate [Member] | 3 Year Term Loan Agreement [Member] | Maximum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate     0.75%       0.25%      
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate             1.05%      
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate             1.475%      
London Interbank Offered Rate (LIBOR) [Member] | 2017 Facility [Member] | Minimum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate             0.805%      
London Interbank Offered Rate (LIBOR) [Member] | 2017 Facility [Member] | Maximum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate             1.50%      
London Interbank Offered Rate (LIBOR) [Member] | 364 Day Credit Agreement [Member] | Minimum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate     0.875%       0.875%      
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage     0.07%              
London Interbank Offered Rate (LIBOR) [Member] | 364 Day Credit Agreement [Member] | Maximum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate     1.75%       1.75%      
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage     0.25%              
London Interbank Offered Rate (LIBOR) [Member] | 3 Year Term Loan Agreement [Member] | Minimum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate     0.875%              
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage     0.07%              
London Interbank Offered Rate (LIBOR) [Member] | 3 Year Term Loan Agreement [Member] | Maximum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate     1.75%              
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage     0.25%              
Federal Funds Rate [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate             0.50%      
Adjusted London Interbank Offered Rate [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate             1.00%      
Adjusted London Interbank Offered Rate [Member] | Minimum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate             0.05%      
Adjusted London Interbank Offered Rate [Member] | Maximum [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate             0.475%      
Senior Notes [Member] | Senior Notes Due 2048 [Member]                    
Debt Instrument [Line Items]                    
Debt instrument interest rate                 4.20%  
Long-term Debt     $ 0       $ 345,900,000      
Percentage of principal amount Company may be required to buy back at             101.00%      
Annualized interest rate including debt issuance cost amortization             4.29% 4.29%    
Debt Instrument, Face Amount                 $ 350,000,000  
Commercial Paper [Member] | Line of Credit [Member] | CP Program [Member]                    
Debt Instrument [Line Items]                    
Proceeds from Issuance of Debt   $ 340,000,000                
Revolving Credit Facility [Member] | Line of Credit [Member] | 2017 Facility [Member]                    
Debt Instrument [Line Items]                    
Line of Credit Facility, Maximum Borrowing Capacity     550,000,000       $ 550,000,000      
Letter of Credit [Member] | Line of Credit [Member] | Letter of Credit Reimbursement Agreement [Member]                    
Debt Instrument [Line Items]                    
Line of Credit Facility, Maximum Borrowing Capacity             165,500,000      
Line of Credit [Member] | 364 Day Credit Agreement [Member]                    
Debt Instrument [Line Items]                    
Line of Credit Facility, Maximum Borrowing Capacity     150,000,000              
Proceeds from Lines of Credit   100,000,000                
Long-term Line of Credit             0      
Line of Credit [Member] | Line of Credit [Member] | 3 Year Term Loan Agreement [Member]                    
Debt Instrument [Line Items]                    
Line of Credit Facility, Maximum Borrowing Capacity     $ 200,000,000              
Proceeds from Lines of Credit   $ 200,000,000       $ 200,000,000        
Long-term Line of Credit             0      
Standby Letters of Credit [Member] | Line of Credit [Member]                    
Debt Instrument [Line Items]                    
Line of Credit Facility, Maximum Borrowing Capacity             57,900,000      
Crane Currency Malta [Member] | Syndicated Loan Facility [Member]                    
Debt Instrument [Line Items]                    
Long-term Debt             76,100,000      
Line of Credit Facility, Maximum Borrowing Capacity | € 72,000,000                  
Long-term Line of Credit | € 59,000,000             € 71,100,000    
Crane Currency Malta [Member] | Building Loan Facility [Member]                    
Debt Instrument [Line Items]                    
Long-term Debt             $ 25,100,000      
Crane Currency Malta [Member] | Syndicated Loan Facility One [Member]                    
Debt Instrument [Line Items]                    
Line of Credit Facility, Maximum Borrowing Capacity | € 49,000,000                  
Long-term Line of Credit | €               48,100,000    
Line of Credit Facility, Periodic Payment | € 300,000                  
Crane Currency Malta [Member] | Syndicated Loan Facility Two [Member]                    
Debt Instrument [Line Items]                    
Line of Credit Facility, Maximum Borrowing Capacity | € 23,000,000                  
Long-term Line of Credit | €               € 23,000,000    
Line of Credit Facility, Periodic Payment | € € 100,000                  
Crane Currency Malta [Member] | EURIBOR [Member] | Syndicated Loan Facility [Member]                    
Debt Instrument [Line Items]                    
Debt Instrument, Basis Spread on Variable Rate 3.50%