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Pay vs Performance Disclosure
12 Months Ended
Dec. 31, 2022
USD ($)
$ / shares
Dec. 31, 2021
USD ($)
$ / shares
Dec. 31, 2020
USD ($)
$ / shares
Pay vs Performance Disclosure [Table]      
Pay vs Performance [Table Text Block]
PAY VERSUS PERFORMANCE
In accordance with Item 402(v) of Regulation S-K, the Company is providing the following information:
 
Year
 
Summary
Compensation
Table Total for
PEO
(1)
 
 
Compensation
Actually Paid to
PEO
(2)(3)(4)
 
 
Average
Summary
Compensation
Table Total for
non-PEO
Named
Executive
Officers
(1)
 
 
Average
Compensation
Actually Paid to
non-PEO
Named
Executive
Officers
(2)(3)(4)
 
 
Value of Initial Fixed
$100 Investment Based
On:
 
 
Net
Income
(6)
 
 
Operating
Income
(6)
 
 
RONAEBIT
(7)
 
 
Total
Shareholder
Return
(5)
 
 
Peer Group
Total
Shareholder
Return
(5)
 
2022
 
$
9,484,660
 
 
$
12,577,620
 
 
$
2,687,596
 
 
$
3,520,186
 
 
$
145.95
 
 
$
127.15
 
 
$
911.7
 
 
$
954.7
 
 
 
35.5
2021
 
 
9,872,946
 
 
 
17,335,075
 
 
 
2,809,457
 
 
 
4,597,000
 
 
 
134.00
 
 
 
134.52
 
 
 
820.5
 
 
 
852.9
 
 
 
35.5
2020
 
 
7,933,529
 
 
 
3,713,918
 
 
 
2,398,651
 
 
 
1,274,781
 
 
 
104.01
 
 
 
111.06
 
 
 
627.0
 
 
 
630.9
 
 
 
27.8

(1)
Information for the principal executive officer (“PEO”) for all years presented relates to Nicholas T. Pinchuk, Chairman, President and Chief Executive Officer.
Information for the non-PEO Named Executive Officers for all years presented relates to:
 
 
 
Aldo J. Pagliari – Senior Vice President–Finance and Chief Financial Officer
 
 
 
Thomas J. Ward – Senior Vice President and President–Repair Systems and Information Group
 
 
 
Anup R. Banerjee – Senior Vice President–Human Resources and Chief Development Officer
 
 
 
Timothy L. Chambers – Senior Vice President and President–Snap-on Tools Group
 
(2)
The dollar amounts reported in the “Compensation Actually Paid to PEO” and “Average Compensation Actually Paid to Non-PEO Named Executive Officers” columns represent the amount of “compensation actually paid” to these executive officers as computed in accordance with Item 402(v) of Regulation S-K. The dollar amounts do not reflect the actual amount of compensation earned by or paid to these individuals during the applicable year.
Fair value or change in fair value, as applicable, of equity awards in the “Compensation Actually Paid” columns for the PEO and non-PEOs NEOs was determined by reference to: (i) for stock options, a Black-Scholes value as of the relevant measurement date; (ii) for outstanding RSU awards from 2021 and 2022, the closing price on the applicable year-end dates or, in the case of vesting dates, the actual vesting price; and (iii) for the 2020 RSUs and PSUs granted in 2020 through 2022, the same valuation methodology as RSU awards discussed above except that year-end values are multiplied by the probability of achievement as of each such date.
 
(3)
For the portion of compensation included in the “Compensation Actually Paid” columns that is based on year-end stock prices, the following prices were used: 2022—$228.49; 2021—$215.38; and 2020—$171.14. For PSUs that vested during the fiscal year, the values are based on the closing stock price on the vesting date, which was $211.67 in fiscal 2022, and $155.34 in fiscal 2020. For

  RSUs that vested during the fiscal year, the values are based on the closing stock price on the vesting date, which was $171.14 in fiscal 2020. For the PSUs that were forfeited in fiscal 2021, the value is based on the closing stock price as of the end of fiscal 2020—$171.14. The performance-based RSUs granted in fiscal 2020, which could have been earned based on fiscal 2020 consolidated financial performance, did not vest and were, therefore, forfeited. For further information regarding the valuation of equity awards, see Note 14 to our Consolidated Financial Statements.
 
(4)
The amounts reported in these columns for the periods presented reflect the following adjustments from total compensation as reported in the Summary Compensation Table (the “SCT”):
 
    
PEO
   
Average
Non-PEO
 
  Total Compensation Reported in 2022 SCT
 
$
9,484,660
 
 
$
2,687,596
 
Less: Value of Option Awards reported in SCT
    (1,179,998     (366,031
Less: Value of Stock Awards reported in SCT
    (4,673,039     (1,087,137
Less: Change in Pension Value in SCT
    (486,011     (78,544 )
Less: Fair value of awards granted in prior fiscal years that failed to vest
           
Plus: Year-end value of awards granted in the fiscal year that are unvested and outstanding
    5,044,374       1,173,525  
Plus: Change in fair value of prior year awards that are unvested and outstanding
    1,961,645       438,230  
Plus: Change in fair value of prior year awards that vested in the fiscal year
    (43,795     (10,476
Plus: Year-end value of options granted in fiscal year that are unvested and outstanding
    1,627,579       504,869  
Plus: Change in fair value of prior year options that are unvested and outstanding
    823,191       234,863  
Plus: Change in fair value of prior year options that vested in the fiscal year
    19,013       4,666  
Plus: Dividends paid on unvested awards
           
Plus: Pension service cost in the fiscal year
          18,625  
  Actual Compensation Paid for Fiscal Year 2022
 
$
12,577,620
 
 
$
3,520,186
 
 
    
PEO
   
Average
Non-PEO
 
  Total Compensation Reported in 2021 SCT
 
$
9,872,946
 
 
$
2,809,457
 
Less: Value of Option Awards reported in SCT
    (1,116,427     (358,976
Less: Value of Stock Awards reported in SCT
    (4,818,839     (1,162,032
Less: Change in Pension Value in SCT
    (365,210     (79,484
Less: Fair value of awards granted in prior fiscal years that failed to vest
           
Plus: Year-end value of awards granted in the fiscal year that are unvested and outstanding
    8,458,207       1,959,466  
Plus: Change in fair value of prior year awards that are unvested and outstanding
    2,486,223       605,915  
Plus: Change in fair value of prior year awards that vested in the fiscal year
           
Plus: Year-end value of options granted in fiscal year that are unvested and outstanding
    1,440,007       463,020  
Plus: Change in fair value of prior year options that are unvested and outstanding
    1,006,273       249,872  
Plus: Change in fair value of prior year options that vested in the fiscal year
    371,895       89,687  
Plus: Dividends paid on unvested awards
           
Plus: Pension service cost in the fiscal year
          20,075  
  Actual Compensation Paid for Fiscal Year 2021
 
$
17,335,075
 
 
$
4,597,000
 
 
    
PEO
   
Average
Non-PEO
 
  Total Compensation Reported in 2020 SCT
 
$
7,933,529
 
 
$
2,398,651
 
Less: Value of Option Awards reported in SCT
    (1,965,392     (490,999
Less: Value of Stock Awards reported in SCT
    (3,117,052     (769,088
Less: Change in Pension Value in SCT
    (228,126     (205,039
Less: Fair value of awards granted in prior fiscal years that failed to vest
    (1,214,582     (278,960
Plus: Year-end value of awards granted in the fiscal year that are unvested and outstanding
    1,717,048       423,700  
Plus: Change in fair value of prior year awards that are unvested and outstanding
    (250,790     (59,993
Plus: Change in fair value of prior year awards that vested in the fiscal year
    (228,108     (49,774
Plus: Year-end value of options granted in fiscal year that are unvested and outstanding
    1,933,364       482,998  
Plus: Change in fair value of prior year options that are unvested and outstanding
    (412,320     (98,840
Plus: Change in fair value of prior year options that vested in the fiscal year
    (453,653     (102,850
Plus: Dividends paid on unvested awards
           
Plus: Pension service cost in the fiscal year
          24,975  
  Actual Compensation Paid for Fiscal Year 2020
 
$
3,713,918
 
 
$
1,274,781
 
Pension service cost was calculated using the same methodology as used for the Company’s Consolidated Financial Statements, which is discussed in Note 12 to our Consolidated Financial Statements.
 
(5)
The share prices illustrate the cumulative total shareholder return (“TSR”) each year of Snap-on common stock and of the S&P 500 Industrials Index since December 31, 2019, of a $100 investment, assuming that dividends were reinvested quarterly.
 
(6)
Net income and Operating income are reported in millions. Operating income represents income from continuing operations, excluding financial services income and the effect of foreign currency translation.
 
(7)
Return on net assets employed before interest and taxes (“RONAEBIT”) is calculated using a thirteen-month average and represents return on net assets employed before interest and taxes, excluding financial services and the effect of foreign currency translation. This methodology is consistent with that employed to calculate a company’s weighted average cost of capital.
   
Company Selected Measure Name Operating income    
Named Executive Officers, Footnote [Text Block] Information for the principal executive officer (“PEO”) for all years presented relates to Nicholas T. Pinchuk, Chairman, President and Chief Executive Officer.
Information for the non-PEO Named Executive Officers for all years presented relates to:
 
 
 
Aldo J. Pagliari – Senior Vice President–Finance and Chief Financial Officer
 
 
 
Thomas J. Ward – Senior Vice President and President–Repair Systems and Information Group
 
 
 
Anup R. Banerjee – Senior Vice President–Human Resources and Chief Development Officer
 
 
 
Timothy L. Chambers – Senior Vice President and President–Snap-on Tools Group
   
Peer Group Issuers, Footnote [Text Block] The share prices illustrate the cumulative total shareholder return (“TSR”) each year of Snap-on common stock and of the S&P 500 Industrials Index since December 31, 2019, of a $100 investment, assuming that dividends were reinvested quarterly.    
PEO Total Compensation Amount $ 9,484,660 $ 9,872,946 $ 7,933,529
PEO Actually Paid Compensation Amount $ 12,577,620 17,335,075 3,713,918
Adjustment To PEO Compensation, Footnote [Text Block] The amounts reported in these columns for the periods presented reflect the following adjustments from total compensation as reported in the Summary Compensation Table (the “SCT”):
    
PEO
   
Average
Non-PEO
 
  Total Compensation Reported in 2022 SCT
 
$
9,484,660
 
 
$
2,687,596
 
Less: Value of Option Awards reported in SCT
    (1,179,998     (366,031
Less: Value of Stock Awards reported in SCT
    (4,673,039     (1,087,137
Less: Change in Pension Value in SCT
    (486,011     (78,544 )
Less: Fair value of awards granted in prior fiscal years that failed to vest
           
Plus: Year-end value of awards granted in the fiscal year that are unvested and outstanding
    5,044,374       1,173,525  
Plus: Change in fair value of prior year awards that are unvested and outstanding
    1,961,645       438,230  
Plus: Change in fair value of prior year awards that vested in the fiscal year
    (43,795     (10,476
Plus: Year-end value of options granted in fiscal year that are unvested and outstanding
    1,627,579       504,869  
Plus: Change in fair value of prior year options that are unvested and outstanding
    823,191       234,863  
Plus: Change in fair value of prior year options that vested in the fiscal year
    19,013       4,666  
Plus: Dividends paid on unvested awards
           
Plus: Pension service cost in the fiscal year
          18,625  
  Actual Compensation Paid for Fiscal Year 2022
 
$
12,577,620
 
 
$
3,520,186
 
 
    
PEO
   
Average
Non-PEO
 
  Total Compensation Reported in 2021 SCT
 
$
9,872,946
 
 
$
2,809,457
 
Less: Value of Option Awards reported in SCT
    (1,116,427     (358,976
Less: Value of Stock Awards reported in SCT
    (4,818,839     (1,162,032
Less: Change in Pension Value in SCT
    (365,210     (79,484
Less: Fair value of awards granted in prior fiscal years that failed to vest
           
Plus: Year-end value of awards granted in the fiscal year that are unvested and outstanding
    8,458,207       1,959,466  
Plus: Change in fair value of prior year awards that are unvested and outstanding
    2,486,223       605,915  
Plus: Change in fair value of prior year awards that vested in the fiscal year
           
Plus: Year-end value of options granted in fiscal year that are unvested and outstanding
    1,440,007       463,020  
Plus: Change in fair value of prior year options that are unvested and outstanding
    1,006,273       249,872  
Plus: Change in fair value of prior year options that vested in the fiscal year
    371,895       89,687  
Plus: Dividends paid on unvested awards
           
Plus: Pension service cost in the fiscal year
          20,075  
  Actual Compensation Paid for Fiscal Year 2021
 
$
17,335,075
 
 
$
4,597,000
 
    
PEO
   
Average
Non-PEO
 
  Total Compensation Reported in 2020 SCT
 
$
7,933,529
 
 
$
2,398,651
 
Less: Value of Option Awards reported in SCT
    (1,965,392     (490,999
Less: Value of Stock Awards reported in SCT
    (3,117,052     (769,088
Less: Change in Pension Value in SCT
    (228,126     (205,039
Less: Fair value of awards granted in prior fiscal years that failed to vest
    (1,214,582     (278,960
Plus: Year-end value of awards granted in the fiscal year that are unvested and outstanding
    1,717,048       423,700  
Plus: Change in fair value of prior year awards that are unvested and outstanding
    (250,790     (59,993
Plus: Change in fair value of prior year awards that vested in the fiscal year
    (228,108     (49,774
Plus: Year-end value of options granted in fiscal year that are unvested and outstanding
    1,933,364       482,998  
Plus: Change in fair value of prior year options that are unvested and outstanding
    (412,320     (98,840
Plus: Change in fair value of prior year options that vested in the fiscal year
    (453,653     (102,850
Plus: Dividends paid on unvested awards
           
Plus: Pension service cost in the fiscal year
          24,975  
  Actual Compensation Paid for Fiscal Year 2020
 
$
3,713,918
 
 
$
1,274,781
 
Pension service cost was calculated using the same methodology as used for the Company’s Consolidated Financial Statements, which is discussed in Note 12 to our Consolidated Financial Statements.
   
Non-PEO NEO Average Total Compensation Amount $ 2,687,596 2,809,457 2,398,651
Non-PEO NEO Average Compensation Actually Paid Amount $ 3,520,186 4,597,000 1,274,781
Adjustment to Non-PEO NEO Compensation Footnote [Text Block] The amounts reported in these columns for the periods presented reflect the following adjustments from total compensation as reported in the Summary Compensation Table (the “SCT”):
    
PEO
   
Average
Non-PEO
 
  Total Compensation Reported in 2022 SCT
 
$
9,484,660
 
 
$
2,687,596
 
Less: Value of Option Awards reported in SCT
    (1,179,998     (366,031
Less: Value of Stock Awards reported in SCT
    (4,673,039     (1,087,137
Less: Change in Pension Value in SCT
    (486,011     (78,544 )
Less: Fair value of awards granted in prior fiscal years that failed to vest
           
Plus: Year-end value of awards granted in the fiscal year that are unvested and outstanding
    5,044,374       1,173,525  
Plus: Change in fair value of prior year awards that are unvested and outstanding
    1,961,645       438,230  
Plus: Change in fair value of prior year awards that vested in the fiscal year
    (43,795     (10,476
Plus: Year-end value of options granted in fiscal year that are unvested and outstanding
    1,627,579       504,869  
Plus: Change in fair value of prior year options that are unvested and outstanding
    823,191       234,863  
Plus: Change in fair value of prior year options that vested in the fiscal year
    19,013       4,666  
Plus: Dividends paid on unvested awards
           
Plus: Pension service cost in the fiscal year
          18,625  
  Actual Compensation Paid for Fiscal Year 2022
 
$
12,577,620
 
 
$
3,520,186
 
 
    
PEO
   
Average
Non-PEO
 
  Total Compensation Reported in 2021 SCT
 
$
9,872,946
 
 
$
2,809,457
 
Less: Value of Option Awards reported in SCT
    (1,116,427     (358,976
Less: Value of Stock Awards reported in SCT
    (4,818,839     (1,162,032
Less: Change in Pension Value in SCT
    (365,210     (79,484
Less: Fair value of awards granted in prior fiscal years that failed to vest
           
Plus: Year-end value of awards granted in the fiscal year that are unvested and outstanding
    8,458,207       1,959,466  
Plus: Change in fair value of prior year awards that are unvested and outstanding
    2,486,223       605,915  
Plus: Change in fair value of prior year awards that vested in the fiscal year
           
Plus: Year-end value of options granted in fiscal year that are unvested and outstanding
    1,440,007       463,020  
Plus: Change in fair value of prior year options that are unvested and outstanding
    1,006,273       249,872  
Plus: Change in fair value of prior year options that vested in the fiscal year
    371,895       89,687  
Plus: Dividends paid on unvested awards
           
Plus: Pension service cost in the fiscal year
          20,075  
  Actual Compensation Paid for Fiscal Year 2021
 
$
17,335,075
 
 
$
4,597,000
 
    
PEO
   
Average
Non-PEO
 
  Total Compensation Reported in 2020 SCT
 
$
7,933,529
 
 
$
2,398,651
 
Less: Value of Option Awards reported in SCT
    (1,965,392     (490,999
Less: Value of Stock Awards reported in SCT
    (3,117,052     (769,088
Less: Change in Pension Value in SCT
    (228,126     (205,039
Less: Fair value of awards granted in prior fiscal years that failed to vest
    (1,214,582     (278,960
Plus: Year-end value of awards granted in the fiscal year that are unvested and outstanding
    1,717,048       423,700  
Plus: Change in fair value of prior year awards that are unvested and outstanding
    (250,790     (59,993
Plus: Change in fair value of prior year awards that vested in the fiscal year
    (228,108     (49,774
Plus: Year-end value of options granted in fiscal year that are unvested and outstanding
    1,933,364       482,998  
Plus: Change in fair value of prior year options that are unvested and outstanding
    (412,320     (98,840
Plus: Change in fair value of prior year options that vested in the fiscal year
    (453,653     (102,850
Plus: Dividends paid on unvested awards
           
Plus: Pension service cost in the fiscal year
          24,975  
  Actual Compensation Paid for Fiscal Year 2020
 
$
3,713,918
 
 
$
1,274,781
 
Pension service cost was calculated using the same methodology as used for the Company’s Consolidated Financial Statements, which is discussed in Note 12 to our Consolidated Financial Statements.
   
Compensation Actually Paid vs. Total Shareholder Return [Text Block] The graph below illustrates the relationship between the compensation actually paid to the Company’s CEO (referred to in the graphs below as the PEO) and the average of the compensation paid to the other NEOs, and the TSR of Snap-on common stock and the S&P 500 Industrials Index for the indicated fiscal years:
 
 

   
Compensation Actually Paid vs. Net Income [Text Block]
The graph below presents the relationship between the compensation actually paid to
the
Company’s CEO
an
d the average of the compensation paid to the other NEOs and the Company’s net income and operating income for the indicated fiscal years.
 
 

 
   
Compensation Actually Paid vs. Company Selected Measure [Text Block]
The graph below presents the relationship between the compensation actually paid to the Company’s CEO and the average of the compensation paid to the other NEOs and the Company’s RONAEBIT for the indicated fiscal years:
 
 

   
Tabular List [Table Text Block] The table below includes the metrics that the Company believes are the most important financial performance measures
u
sed to link compensation actually paid to Company performance for the most recently completed fiscal year:
 
Financial Performance Measure
 
Description
Operating income   Metric in annual incentive plan
RONAEBIT   Metric in annual incentive plan and PSUs
Sales   Metric in PSUs
Share price   Impacts value of stock options, PSUs and RSUs
   
Total Shareholder Return Amount $ 145.95 134 104.01
Peer Group Total Shareholder Return Amount 127.15 134.52 111.06
Net Income (Loss) $ 911,700,000 $ 820,500,000 $ 627,000,000
Company Selected Measure Amount 954,700,000 852,900,000 630,900,000
PEO Name Nicholas T. Pinchuk    
Year End Closing Stock Price | $ / shares $ 228.49 $ 215.38 $ 171.14
Closing Stock Price On The Vesting Date $ 211.67   $ 155.34
Measure [Axis]: 1      
Pay vs Performance Disclosure [Table]      
Measure Name Operating income    
Non-GAAP Measure Description [Text Block] Operating income represents income from continuing operations, excluding financial services income and the effect of foreign currency translation.    
Measure [Axis]: 2      
Pay vs Performance Disclosure [Table]      
Other Performance Measure Amount 0.355 0.355 0.278
Measure Name RONAEBIT    
Non-GAAP Measure Description [Text Block] Return on net assets employed before interest and taxes (“RONAEBIT”) is calculated using a thirteen-month average and represents return on net assets employed before interest and taxes, excluding financial services and the effect of foreign currency translation. This methodology is consistent with that employed to calculate a company’s weighted average cost of capital.    
Measure [Axis]: 3      
Pay vs Performance Disclosure [Table]      
Measure Name Sales    
Measure [Axis]: 4      
Pay vs Performance Disclosure [Table]      
Measure Name Share price    
RSUs [Member]      
Pay vs Performance Disclosure [Table]      
Closing Stock Price On The Vesting Date     $ 171.14
PEO [Member] | Value of Option Awards reported in SCT [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount $ (1,179,998) $ (1,116,427) (1,965,392)
PEO [Member] | Value of Stock Awards reported in SCT [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (4,673,039) (4,818,839) (3,117,052)
PEO [Member] | Change in Pension Value in SCT [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (486,011) (365,210) (228,126)
PEO [Member] | Fair value of awards granted in prior fiscal years that failed to vest [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount     (1,214,582)
PEO [Member] | Year-end value of awards granted in the fiscal year that are unvested and outstanding [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 5,044,374 8,458,207 1,717,048
PEO [Member] | Change in fair value of prior year awards that are unvested and outstanding [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 1,961,645 2,486,223 (250,790)
PEO [Member] | Change in fair value of prior year awards that vested in the fiscal year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (43,795)   (228,108)
PEO [Member] | Year-end value of options granted in fiscal year that are unvested and outstanding [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 1,627,579 1,440,007 1,933,364
PEO [Member] | Change in fair value of prior year options that are unvested and outstanding [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 823,191 1,006,273 (412,320)
PEO [Member] | Change in fair value of prior year options that vested in the fiscal year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 19,013 371,895 (453,653)
Non-PEO NEO [Member] | Value of Option Awards reported in SCT [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (366,031) (358,976) (490,999)
Non-PEO NEO [Member] | Value of Stock Awards reported in SCT [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (1,087,137) (1,162,032) (769,088)
Non-PEO NEO [Member] | Change in Pension Value in SCT [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (78,544) (79,484) (205,039)
Non-PEO NEO [Member] | Fair value of awards granted in prior fiscal years that failed to vest [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount     (278,960)
Non-PEO NEO [Member] | Year-end value of awards granted in the fiscal year that are unvested and outstanding [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 1,173,525 1,959,466 423,700
Non-PEO NEO [Member] | Change in fair value of prior year awards that are unvested and outstanding [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 438,230 605,915 (59,993)
Non-PEO NEO [Member] | Change in fair value of prior year awards that vested in the fiscal year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount (10,476)   (49,774)
Non-PEO NEO [Member] | Year-end value of options granted in fiscal year that are unvested and outstanding [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 504,869 463,020 482,998
Non-PEO NEO [Member] | Change in fair value of prior year options that are unvested and outstanding [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 234,863 249,872 (98,840)
Non-PEO NEO [Member] | Change in fair value of prior year options that vested in the fiscal year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount 4,666 89,687 (102,850)
Non-PEO NEO [Member] | Pension service cost in the fiscal year [Member]      
Pay vs Performance Disclosure [Table]      
Adjustment to Compensation Amount $ 18,625 $ 20,075 $ 24,975