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Stock Incentive Plans (Tables)
 12 Months Ended
Dec. 31, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Status of outstanding stock options [Text Block]
A summary of the plans’ shares under option at December 31, 2011, 2010 and 2009 is as follows:
 
 
Shares (thousands)
 
Weighted average exercise price
 
Weighted average remaining contractual life
(in years)
 
Aggregate intrinsic value
(in millions)
Outstanding at January 1, 2009
5,798

 
$
27.86

 
6.7

 
$
6.0

Exercised
(381
)
 
$
23.89

 
 

 
$
3.4

Forfeited
(240
)
 
$
32.16

 
 

 
 

Outstanding at December 31, 2009
5,177

 
$
27.98

 
5.8

 
$
29.7

Exercised
(1,888
)
 
$
26.73

 
 

 
$
50.3

Forfeited
(36
)
 
$
33.95

 
 

 
 

Outstanding at December 31, 2010
3,253

 
$
28.64

 
4.9

 
$
142.2

Exercised
(1,033
)
 
$
27.15

 
 

 
$
48.4

Outstanding at December 31, 2011
2,220

 
$
29.36

 
4.1

 
$
76.3

 
 
 
 
 
 
 
 
Options exercisable at December 31, 2011
2,220

 
$
29.36

 
4.1

 
$
76.3
Summarize information about stock options outstanding [Text Block]
The following table summarizes information about the stock options outstanding and exercisable at December 31, 2011: 

 
 
Options outstanding and exercisable
Range of Exercise Prices
 
Number outstanding and exercisable
(thousands)
 
Weighted average remaining contractual life (years)
 
Weighted average exercise price
$12.07 - $16.52
 
155

 
1.1

 
$
14.55

$22.15 - $34.95
 
2,065

 
4.3

 
$
30.46

 
 
2,220

 
4.1

 
$
29.36
Proceeds from stock option exercises [Text Block]
Proceeds from stock option exercises for the years ended December 31, 2011, 2010 and 2009 were as follows:

 
Year Ended December 31,
(millions of dollars)
2011
 
2010
 
2009
Proceeds from stock options exercised — gross
$
28.6

 
$
55.4

 
$
9.4

Tax benefit (loss)
24.4

 
11.7

 
(0.7
)
Proceeds from stock options exercised, net of tax
$
53.0

 
$
67.1

 
$
8.7
Restricted stock compensation expense [Text Block]
Restricted stock compensation expense reduced earnings before income taxes and noncontrolling interest, net earnings and earnings per share for the years ended December 31, 2011, 2010 and 2009 by:

 
Year Ended December 31,
(millions of dollars, except per share data)
2011
 
2010
 
2009
Earnings before income taxes and noncontrolling interest
$
15.1

 
$
18.9

 
$
14.8

Net earnings
$
11.4

 
$
14.7

 
$
11.4

Earnings per share — basic
$
0.10

 
$
0.13

 
$
0.10

Earnings per share — diluted
$
0.09

 
$
0.11

 
$
0.10
Status of nonvested restricted stock [Text Block]
A summary of the status of the Company’s nonvested restricted stock for employees and non-employee directors at December 31, 2011, 2010 and 2009 is as follows:
 
 
Shares subject to restriction
(thousands)
 
Weighted average price
Nonvested at January 1, 2009
662

 
$
45.29

Granted
1,044

 
$
20.61

Vested
(24
)
 
$
51.03

    Forfeited
(135
)
 
$
29.79

Nonvested at December 31, 2009
1,547

 
$
29.90

Granted
603

 
$
36.16

Vested
(188
)
 
$
44.80

Forfeited
(91
)
 
$
27.10

Nonvested at December 31, 2010
1,871

 
$
30.55

Granted
274

 
$
70.57

Vested
(609
)
 
$
27.39

Forfeited
(106
)
 
$
38.05

Nonvested at December 31, 2011
1,430

 
$
39.02
Amounts expensed under plan and share issuances [Text Block]
The amounts expensed under the plan and the share issuances for the three-year measurement periods ended December 31, 2011, 2010 and 2009 were as follows:

 
Year Ended December 31,
 (millions of dollars, except share data)
2011
 
2010
 
2009
Expense
$
26.3

 
$
23.9

 
$
10.7

Number of shares*
538,180

 
104,205

 
269,896


________________
*Shares are issued in February of the following year.