VPT Loans - Schedule of VPT Loans (Details) - USD ($) $ in Millions	Sep. 30, 2016	Oct. 02, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Available-for-sale securities	$ 95.3	$ 93.0
Notes Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
LT Notes	59.2	30.9
Commitment	11.4	95.6
NYPC loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commitment	0.0	72.8
NYPC loan | Notes Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
LT Notes	18.5	18.7
MPTC loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commitment	11.4	22.8
MPTC loan | Notes Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
LT Notes	40.7	12.2
CPTC loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commitment	1.1	0.0
Short-term Investments | CPTC loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Available-for-sale securities	95.3
Other Assets | CPTC loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Available-for-sale securities		83.9
Available-for-sale Securities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Available-for-sale securities	95.3	83.9
Commitment	$ 1.1	$ 0.0