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Supplemental Cash Flow Information
 12 Months Ended
Dec. 28, 2014
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information
Supplemental Cash Flow Information 
Changes in operating assets and liabilities, net of acquisitions and the effect of deconsolidated entities, as disclosed in the statements of cash flows, for the fiscal years 2014, 2013 and 2012, respectively, were as follows: 
 
2014
 
2013
 
2012
 
(In millions of dollars)
Increase in trade accounts receivable
$
(155.4
)
 
$
(14.6
)
 
$
(57.9
)
Increase in prepaid expenses and other assets
(14.7
)
 
(11.8
)
 
(12.5
)
Increase in accounts payable and accrued liabilities
36.4

 
43.8

 
54.1

Increase in accrued payroll and related taxes
28.5

 
39.2

 
2.4

Decrease in accrued insurance
(2.7
)
 
(2.9
)
 
(8.7
)
Increase (decrease) in income and other taxes
10.9

 
5.5

 
(3.7
)
 
 
 
 
 
 
Total changes in operating assets and liabilities
$
(97.0
)
 
$
59.2

 
$
(26.3
)
 
The Company paid interest of $1.6 million, $2.0 million and $2.6 million in 2014, 2013 and 2012, respectively. The Company paid income taxes of $10.9 million in 2014, $16.9 million in 2013 and $18.8 million in 2012. 
During 2013, the Company determined that both cash and equivalents and accrued payroll and related taxes were understated by $4.8 million as of the 2012 year end. The Company determined that the impact of this error on the consolidated balance sheets and consolidated statements of cash flows was not material. As a result of correcting the error in 2013, changes in operating assets and liabilities and net cash from operating activities are both overstated by $4.8 million in the consolidated statements of cash flows for 2013. Additionally, in 2013, a cash payment of $1.4 million to TS Kelly was improperly classified in operating activities in the consolidated statements of cash flows, resulting in the understatement of operating activities and overstatement of investing activities in the consolidated statements of cash flows for 2013.