CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (loss)	Retained Earnings	Noncontrolling Interest
Beginning balance at Nov. 30, 2016	$ 1,975,798	$ 41	$ 440,713	$ (67,262)	$ (93,116)	$ 1,695,400	$ 22
Beginning Balance (in shares) at Nov. 30, 2016		40,816		1,339
Cumulative effect of changes in accounting principles	4,536					4,536
Share-based compensation	17,368		17,368
Tax benefits from equity awards	5,546		5,546
Issuance of common stock on exercise of options, for employee stock purchase plan and vesting of restricted stock, net of shares withheld for employee taxes, value	(5,635)		4,236	$ (9,871)
Issuance of common stock on exercise of options, for employee stock purchase plan and vesting of restricted stock, net of shares withheld for employee taxes, shares		276		80
Cash dividends declared	(41,815)					(41,815)
Changes in ownership of noncontrolling interests	63		85				$ (22)
Other comprehensive income (loss)	31,197				31,197
Net income	300,240					300,240
Ending Balance at Nov. 30, 2017	2,287,298	$ 41	467,948	$ (77,133)	(61,919)	1,958,361
Ending Balance (in shares) at Nov. 30, 2017		41,092		1,419
Share-based compensation	22,678		22,678
Issuance of common stock on exercise of options, for employee stock purchase plan and vesting of restricted stock, net of shares withheld for employee taxes, value	(1,489)		4,924	$ (6,413)
Issuance of common stock on exercise of options, for employee stock purchase plan and vesting of restricted stock, net of shares withheld for employee taxes, shares		258		68
Repurchases of common stock, amount	(65,987)			$ (65,987)
Repurchases of common stock, shares				680
Cash dividends declared	(59,720)					(59,720)
Common stock issued for the acquisition of Convergys, net of stock issuance costs,value	1,016,664	$ 12	1,016,652
Common stock issued for the acquisition of Convergys, net of stock issuance costs, shares		11,511
Other comprehensive income (loss)	(64,369)				(64,369)
Net income	299,981					299,981
Ending Balance at Nov. 30, 2018	3,435,054	$ 53	1,512,201	$ (149,533)	(126,288)	2,198,621
Ending Balance (in shares) at Nov. 30, 2018		52,861		2,167
Cumulative effect of changes in accounting principles	(1,955)				(1,955)	1,955
Share-based compensation	27,959		27,959
Issuance of common stock on exercise of options, for employee stock purchase plan and vesting of restricted stock, net of shares withheld for employee taxes, value	(2,544)		5,367	$ (7,911)
Issuance of common stock on exercise of options, for employee stock purchase plan and vesting of restricted stock, net of shares withheld for employee taxes, shares		293		72
Repurchases of common stock, amount	(15,184)			$ (15,184)
Repurchases of common stock, shares				160
Cash dividends declared	(76,607)					(76,607)
Other comprehensive income (loss)	(80,834)				(80,834)
Stock issuance costs (related to the Convergys acquisition in fiscal year 2018)	(107)		(107)
Net income	500,712					500,712
Ending Balance at Nov. 30, 2019	$ 3,788,450	$ 53	$ 1,545,421	$ (172,627)	$ (209,077)	$ 2,624,680
Ending Balance (in shares) at Nov. 30, 2019		53,154		2,399