Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	May 31, 2016	May 31, 2015
Operating activities:
Net income	$ 95,146	$ 90,472
Reconciliation of net income to net cash provided by operating activities:
Depreciation and amortization	124,809	114,829
Stock-based compensation expense	64,439	67,834
Gain on sale of assets	(43,255)	0
Impairment of assets	0	1,243
Excess tax benefit from stock-based compensation	(60)	(5,193)
Net periodic pension and postretirement expense	813	993
Pension and postretirement contributions	(1,656)	(2,285)
Deferred income taxes	25,609	(3,944)
Change in assets and liabilities:
Accounts receivable, net	13,036	67,628
Other current assets	(28,829)	(29,725)
Accounts payable	(19,873)	(7,002)
Accrued expenses	(15,598)	(53,476)
Income tax	24,839	20,242
Deferred revenue	80,764	70,140
Other liabilities	8,384	2,528
Net cash provided by operating activities	328,568	334,284
Investing activities:
Capital expenditures on property and equipment	(52,660)	(69,038)
Acquisitions of businesses, net of cash acquired	(1,113,440)	(369,908)
Proceeds from sale of assets	190,215	0
Change in other assets	4,272	(339)
Settlements of forward contracts	(4,148)	2,419
Net cash used in investing activities	(975,761)	(436,866)
Financing activities:
Proceeds from borrowings	1,100,000	440,000
Repayment of borrowings	(269,882)	(153,263)
Payment of debt issuance costs	(15,430)	0
Excess tax benefit from stock-based compensation	60	5,193
Repurchases of common stock	(106,015)	(105,247)
Net cash provided by financing activities	708,733	186,683
Foreign exchange impact on cash balance	(9,148)	(11,378)
Net increase in cash and cash equivalents	52,392	72,723
Cash and cash equivalents at the beginning of the period	291,580	153,156
Cash and cash equivalents at the end of the period	$ 345,540	$ 225,879