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Retirement Plans
 9 Months Ended
Jun. 26, 2015
Compensation and Retirement Disclosure [Abstract]  
Retirement Plans
12.
Retirement Plans
The net periodic benefit cost for the Company's defined benefit pension plans was as follows:
 
Three Months Ended
 
Nine Months Ended
 
June 26,
2015
 
June 27,
2014
 
June 26,
2015
 
June 27,
2014
Service cost
$
1.2


$
1.3

 
$
3.6

 
$
3.8

Interest cost
4.4


4.9

 
13.3

 
14.8

Expected return on plan assets
(5.8
)

(6.1
)
 
(17.3
)
 
(18.3
)
Amortization of net actuarial loss
2.4


2.2

 
7.1

 
6.4

Amortization of prior service (credit) cost
(0.2
)

(0.2
)
 
(0.6
)
 
(0.5
)
Plan settlements
3.4

 
2.6

 
4.6

 
2.9

Net periodic benefit cost
$
5.4


$
4.7

 
$
10.7

 
$
9.1



The net periodic benefit credit for the Company's postretirement benefit plans for the three months ended June 26, 2015 and June 27, 2014 was $0.5 million and $1.7 million, respectively, and for the nine months ended June 26, 2015 and June 27, 2014 was $1.5 million and $5.3 million, respectively. The individual components of the credit were not material.
Net periodic benefit cost (credit) for the Company's defined benefit pension plans and postretirement benefit plans was included within cost of sales and selling, general and administrative expenses on the unaudited condensed consolidated statements of income.
The Company does not anticipate making material involuntary contributions in fiscal 2015, but may elect to make voluntary contributions to its defined benefit pension plans or its postretirement benefit plans during fiscal 2015.