Borrowings and Credit Arrangements - Company's Borrowings (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012	Sep. 29, 2012
Schedule Of Borrowings [Line Items]
Convertible Notes	$ 734,476
Current debt obligations, net of debt discount	798,937	64,435
Convertible Notes	839,828	1,558,660
Total long-term debt obligations	4,237,085	4,971,179
Total debt obligations	5,036,022	5,035,614
Term Loan A [Member]
Schedule Of Borrowings [Line Items]
Current debt obligations, net of debt discount	49,603	49,582
Long-term debt obligations, net of debt discount	930,066	942,065
Term Loan B [Member]
Schedule Of Borrowings [Line Items]
Current debt obligations, net of debt discount	14,858	14,853
Long-term debt obligations, net of debt discount	1,467,191	1,470,454
Senior Notes [Member]
Schedule Of Borrowings [Line Items]
Long-term debt obligations, net of debt discount	$ 1,000,000	$ 1,000,000