Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	May 31, 2014	May 31, 2013
Operating activities:
Net income	$ 87,914	$ 67,561
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	98,779	65,356
Stock-based compensation expense	79,996	70,561
Impairment of assets	0	1,629
Excess tax benefit from stock-based compensation	(10,327)	(11,802)
Net periodic pension and postretirement expense	5,670	4,482
Pension and postretirement contributions	(1,650)	(11,876)
Deferred income taxes	28,907	(26,462)
Change in assets and liabilities:
Accounts receivable, net	38,871	37,053
Other current assets	(23,153)	(15,803)
Accounts payable	119	(10,430)
Accrued expenses	(16,666)	(11,585)
Income tax payable	(20,656)	27,561
Deferred revenue	105,570	75,998
Other liabilities	1,600	(1,077)
Net cash provided by operating activities	374,974	261,166
Investing activities:
Capital expenditures on property and equipment	(51,036)	(42,436)
Acquisitions of businesses, net of cash acquired	0	(155,505)
Intangible assets acquired	(714)	0
Change in other assets	2,762	(2,317)
Settlements of forward contracts	1,309	128
Net cash used in investing activities	(47,679)	(200,130)
Financing activities:
Proceeds from borrowings	30,000	45,000
Repayment of borrowings	(348,086)	(97,001)
Excess tax benefit from stock-based compensation	10,327	11,802
Proceeds from the exercise of employee stock options	0	285
Repurchases of common stock	(47,429)	(83,365)
Net cash used in financing activities	(355,188)	(123,279)
Foreign exchange impact on cash balance	(9,476)	(15,634)
Net decrease in cash and cash equivalents	(37,369)	(77,877)
Cash and cash equivalents at the beginning of the period	258,367	345,008
Cash and cash equivalents at the end of the period	$ 220,998	$ 267,131