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Fair Value Measurements (Tables)
12 Months Ended
Jan. 03, 2016
Fair Value Disclosures [Abstract]  
Fair Value Measurements on a Recurring Basis
The following tables present the assets carried at fair value as of year-end 2015 and 2014 on the consolidated balance sheet by fair value hierarchy level, as described below. 
Level 1 measurements consist of unadjusted quoted prices in active markets for identical assets or liabilities.  Level 2 measurements include quoted prices in markets that are not active or model inputs that are observable either directly or indirectly for substantially the full term of the asset or liability. Level 3 measurements include significant unobservable inputs. 
 
 
Fair Value Measurements on a Recurring Basis
As of Year-End 2015
Description
 
Total
 
Level 1
 
Level 2
 
Level 3
 
 
(In millions of dollars)
Money market funds
 
$
3.7

 
$
3.7

 
$

 
$

Available-for-sale investment
 
142.3

 
142.3

 

 

 
 
 
 
 
 
 
 
 
Total assets at fair value
 
$
146.0

 
$
146.0

 
$

 
$

 
 
Fair Value Measurements on a Recurring Basis
As of Year-End 2014
Description
 
Total
 
Level 1
 
Level 2
 
Level 3
 
 
(In millions of dollars)
Money market funds
 
$
3.3

 
$
3.3

 
$

 
$

Available-for-sale investment
 
97.9

 
97.9

 

 

 
 
 
 
 
 
 
 
 
Total assets at fair value
 
$
101.2

 
$
101.2

 
$

 
$