VPT LOANS - Loans and Commitments (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 30, 2016	Sep. 30, 2016
Long-term notes receivable and Available-for-sale Securities [Line Items]
Fair Value	$ 68.5		$ 95.3
Commitment	0.0		1.1
Original CPTC loans
Long-term notes receivable and Available-for-sale Securities [Line Items]
Fair Value	60.5	$ 98.1	95.3
Commitment	0.0		1.1
DRTC loans
Long-term notes receivable and Available-for-sale Securities [Line Items]
Fair Value	8.0		0.0
Commitment	0.0		0.0
Loans Receivable
Long-term notes receivable and Available-for-sale Securities [Line Items]
Long-term	82.7		59.2
Commitment	2.2		11.4
NYPC loan | Loans Receivable
Long-term notes receivable and Available-for-sale Securities [Line Items]
Long-term	18.5		18.5
Commitment	0.0		0.0
MPTC loans | Loans Receivable
Long-term notes receivable and Available-for-sale Securities [Line Items]
Long-term	56.1		40.7
Commitment	0.0		11.4
Original CPTC loans | Loans Receivable
Long-term notes receivable and Available-for-sale Securities [Line Items]
Long-term	5.1		0.0
Commitment	2.2		0.0
Proton International | Loans Receivable
Long-term notes receivable and Available-for-sale Securities [Line Items]
Long-term	3.0		0.0
Commitment	$ 0.0		$ 0.0