Fair Value Measurements (Tables)
 6 Months Ended
Mar. 28, 2015
Fair Value Disclosures [Abstract]  
Fair Value Assets and Liabilities Measured on Recurring Basis
Assets and liabilities measured and recorded at fair value on a recurring basis consisted of the following at March 28, 2015: 
 
 
 
Fair Value at Reporting Date Using
 
Balance as of March 28, 2015
 
Quoted Prices in
Active Market for
Identical Assets
(Level 1)
 
Significant
Other
Observable
Inputs (Level 2)
 
Significant
Unobservable
Inputs (Level 3)
Assets:
 
 
 
 
 
 
 
Marketable securities:
 
 
 
 
 
 
 
Equity securities
$
21.8

 
$
21.8

 
$
—

 
$
—

Mutual funds
8.3

 
8.3

 
—

 
—

Interest rate cap - derivative
3.6

 
—

 
3.6

 
—

Total
$
33.7

 
$
30.1

 
$
3.6

 
$
—

Liabilities:
 
 
 
 
 
 
 
Deferred compensation liabilities
$
37.2

 
$
37.2

 
$
—

 
$
—

Total
$
37.2

 
$
37.2

 
$
—

 
$
—
Estimated Fair Values of Convertible Notes
The estimated fair values of the Company’s Convertible Notes at March 28, 2015 were as follows:
 
2010 Notes
$
652.3

2012 Notes
613.3

2013 Notes
430.2

 
$
1,695.8