CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net loss	$ (94,640)	$ (47,944)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	109,417	102,576
Stock-based compensation	92,159	74,913
Non-cash interest expense	19,443	19,577
Deferred tax provision (benefit)	3,446	(24,228)
Other	(5,258)	(1,102)
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	6,518	30,281
Prepaid expenses and other assets	(11,695)	(11,517)
Accounts payable	(32,097)	2,147
Accrued expenses and other liabilities	(10,301)	9,501
Deferred revenue	88,190	61,830
Net cash provided by operating activities	165,182	216,034
Cash flows from investing activities:
Capital expenditures	(24,719)	(29,588)
Payments for business and technology acquisitions, net of cash acquired	(135,537)	(474,259)
Payments to Acquire Investments	11,504	0
Proceeds from sales and maturities of marketable securities and other investments	21,634	181
Net cash used in investing activities	(150,126)	(503,666)
Cash flows from financing activities:
Payments of debt	(2,516)	(146,123)
Proceeds from long-term debt, net of issuance costs	0	352,392
Payments for repurchase of common stock	(26,435)	0
Payments for settlement of share-based derivatives	(5,286)	(3,801)
Proceeds from (Payments for) Other Financing Activities	(1,519)	(1,320)
Proceeds from issuance of common stock from employee stock plans	11,922	13,085
Cash used to net share settle employee equity awards	(31,047)	(49,518)
Net cash (used in) provided by financing activities	(54,881)	164,715
Effects of exchange rate changes on cash and cash equivalents	9	(1,542)
Net decrease in cash and cash equivalents	(39,816)	(124,459)
Cash and cash equivalents at beginning of period	808,118	1,129,761
Cash and cash equivalents at end of period	$ 768,302	$ 1,005,302