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Stockholder's Equity (Tables)
 12 Months Ended
Dec. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Common Stock and Treasury Stock Share Activity
Common stock and treasury stock activity:
 
Common Stock
 
Treasury Stock
Balance, January 3, 2016
 
37,697,865

 
3,183,266

Acquired
 
—

 
138,831

Issued
 
—

 
(734,994
)
Balance, January 1, 2017
 
37,697,865

 
2,587,103

Issued
 
—
 
(429,471
)
Balance, December 31, 2017
 
37,697,865

 
2,157,632

Issued
 
—

 
(547,064
)
Balance, December 30, 2018
 
37,697,865

 
1,610,568
Stock Options Valuation Assumptions
Stock option valuation assumptions:
2018
 
2017
 
2016
Expected dividend yield
—

 
—

 
—

Expected volatility
31.0
%
 
32.3
%
 
32.7
%
Risk-free interest rate
1.99% to 2.58%

 
1.0% to 2.5%

 
1.5
%
Expected life in years
6.8

 
7.2

 
7.2
Stock Option Transactions for Stock Option Plans
Stock option transactions for Teledyne’s stock option plans are summarized as follows:
 
2018
 
2017
 
2016
 
Shares
 
Weighted Average Exercise Price
 
Shares
 
Weighted Average Exercise Price
 
Shares
 
Weighted Average Exercise Price
Beginning balance
2,285,703
 
$
83.73

 
2,175,442

 
$
70.44

 
2,383,870

 
$
63.74

Granted
376,065

 
$
192.28

 
543,880

 
$
123.40

 
520,310

 
$
78.46

Exercised
(516,927
)
 
$
71.95

 
(390,835
)
 
$
63.96

 
(687,018
)
 
$
52.54

Canceled or expired
(80,101
)
 
$
129.85

 
(42,784
)
 
$
92.79

 
(41,720
)
 
$
82.49

Ending balance
2,064,740

 
$
104.66

 
2,285,703

 
$
83.73

 
2,175,442

 
$
70.44

Options exercisable at end of period
1,257,766

 
$
78.26

 
1,443,241

 
$
70.35

 
1,530,847

 
$
65.52
Stock Options Outstanding and Stock Options Exercisable Under Stock Option Plans
The following table provides certain information with respect to stock options outstanding and stock options exercisable at December 30, 2018, under the stock option plans: 
 
  
Stock Options Outstanding
 
Stock Options Exercisable
Range of Exercise Prices
  
Shares
 
Weighted Average Exercise Price
 
Remaining life in years
 
Shares
 
Weighted Average Exercise Price
$20.70-$49.99
  
230,366

 
$
43.29

 
1.8
 
230,366

 
$
43.29

$50.00-$99.99
  
1,032,206

 
$
80.13

 
5.5
 
892,430

 
$
80.40

$100.00-$149.99
  
447,694

 
$
123.40

 
8.2
 
134,248

 
$
123.39

$150.00-$199.99
  
351,894

 
$
192.01

 
9.2
 
722

 
$
192.00

Over $199.99
  
2,580

 
$
231.98

 
9.7
 
—

 
$
—

 
  
2,064,740

 
$
104.66

 
6.3
 
1,257,766

 
$
78.26
Summary of Restricted Stock Activity
The following table shows restricted stock award activity for grants made to non-employee directors:
Directors Restricted stock:
 
Shares
 
Weighted average fair value per share
Balance, January 3, 2016
 
9,534

 
$
108.95

Granted
 
10,305

 
$
96.00

Issued
 
(8,532
)
 
$
108.93

Balance, January 1, 2017
 
11,307

 
$
97.16

Granted
 
7,371

 
$
134.26

Issued
 
(10,305
)
 
$
96.00

Balance, December 31, 2017
 
8,373

 
$
131.25

Granted
 
5,112

 
$
193.39

Issued
 
(5,733
)
 
$
134.26

Balance, December 30, 2018
 
7,752

 
$
170.00

The following table shows restricted stock award activity for grants made to employees:
Restricted stock:
  
Shares
 
Weighted average fair value per share
Balance, January 3, 2016
 
99,636

 
$
81.15

Granted
 
37,104

 
$
72.91

Issued
 
(39,357
)
 
$
67.15

Forfeited/Canceled
 
(339
)
 
$
79.93

Balance, January 1, 2017
 
97,044

 
$
83.68

Granted
 
24,232

 
$
114.42

Issued
 
(30,704
)
 
$
87.98

Forfeited/Canceled
 
(2,136
)
 
$
82.53

Balance, December 31, 2017
 
88,436

 
$
90.63

Granted
 
16,733

 
$
171.80

Issued
 
(28,855
)
 
$
92.74

Forfeited/Canceled
 
(2,094
)
 
$
133.20

Balance, December 30, 2018
 
74,220

 
$
106.92