The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin.

No definition available.

Variable Interest Entity - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended		12 Months Ended				1 Months Ended	12 Months Ended
	Sep. 30, 2011	Jun. 30, 2011	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013 Intial Term	Sep. 27, 2013 Extension Term	Apr. 30, 2010 C P T C	Sep. 27, 2013 Scripps Proton Therapy Center	Sep. 27, 2013 Scripps Proton Therapy Center Maximum
Variable Interest Entity [Line Items]
Value of CPTC proton therapy system agreement							$ 88
Duration of CPTC proton therapy system service agreement		10 years
Approximate value of CPTC proton therapy system service agreement		60
CPTC loan facility, Varian's maximum loan commitment	115.3
Pro rata share of the Company's obligation to fund the initial distribution and subsequent advances	69.75%
Loan to CPTC			62.7	49.7
CPTC loan facility, end of the drawdown period	2014
Loan facility to CPTC	165.3		165.3	165.3
CPTC loan facility, maturity			2015-09
CPTC loan facility, interest rate margin					6.25%	7.00%
CPTC loan facility, minimum interest rate during initial term			8.25%
CPTC loan facility, minimum interest rate during extension term			9.00%
CPTC loan facility, description of interest and principal payments			The loan, which matures in September 2015, bears interest at LIBOR plus 6.25% per annum with a minimum interest rate of 8.25% per annum. The loan can be extended for two additional one-year terms at the election of CPTC during which extensions interest will accrue at LIBOR plus 7.00% per annum with a minimum interest rate of 9.00% per annum
CPTC loan facility, amortization period over which monthly payments are calculated after July 1, 2014			15 years
CPTC loan facility, interest rate based on which monthly payments are calculated after July 1, 2014			8.25%
CPTC loan facility, commitment fee as a % of loan facility amount			1.50%
CPTC loan facility, exit fee as a % of principal paid			1.00%
The Company's subsidiary right to share revenues of the Scripps Proton Therapy Center (%)								4.00%
The Company's subsidiary right to share revenues of the Scripps Proton Therapy Center (period)								35 years
Percentage of the gross revenues of the Scripps Proton Therapy Center upon repayment.									1.00%
Loan repayment amount that results in reduction of revenue shares								71
Accounts receivable from CPTC			$ 43.5	$ 30.7