Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	Class B Common Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance at Dec. 31, 2013	$ 865			$ 608	$ 402		$ (145)
Beginning balance, shares at Dec. 31, 2013		12,799,999	131,537,798				(2,120,709)
Net income	226				226
Other comprehensive loss	(31)					$ (31)
Issuance of common stock related to exercise of options and vesting of RSUs	3			3
Issuance of common stock related to exercise of options and vesting of RSUs, shares			777,667
Tax benefits on equity awards, net	$ 20			20
Repurchase of common stock, shares	0
Withholding taxes on net share settlements of equity awards	$ (33)			(33)
Fair value of stock options assumed in connection with acquisition (Note 3)	5			5
Stock-based compensation	70			70
Other, shares							(73,464)
Ending balance at Dec. 31, 2014	1,125			673	628	(31)	$ (145)
Ending balance, shares at Dec. 31, 2014		12,799,999	132,315,465				(2,194,173)
Net income	198				198
Other comprehensive loss	(32)					(32)
Issuance of common stock related to exercise of options and vesting of RSUs	12			12
Issuance of common stock related to exercise of options and vesting of RSUs, shares			1,520,777
Issuance of treasury stock as charitable contribution (Note 16)	67			14			$ 53
Issuance of treasury stock as charitable contribution, Shares (Note 16)							801,042
Tax benefits on equity awards, net	$ 35			35
Repurchase of common stock, shares	0
Withholding taxes on net share settlements of equity awards	$ (73)			(73)
Stock-based compensation	80			80
Ending balance at Dec. 31, 2015	$ 1,412			741	826	(63)	$ (92)
Ending balance, shares at Dec. 31, 2015	132,443,111	12,799,999	133,836,242				(1,393,131)
Net income	$ 120				120
Cumulative effect adjustment from adoption of ASU 2016-09 (Note 2)	(1)				(1)
Other comprehensive loss	(14)					(14)
Issuance of common stock related to exercise of options and vesting of RSUs	7			7
Issuance of common stock related to exercise of options and vesting of RSUs, shares			870,225
Repurchase of common stock	$ (105)						$ (105)
Repurchase of common stock, shares	(2,002,356)						(2,002,356)
Withholding taxes on net share settlements of equity awards	$ (15)			(15)
Stock-based compensation	98			98
Ending balance at Dec. 31, 2016	$ 1,502			$ 831	$ 945	$ (77)	$ (197)
Ending balance, shares at Dec. 31, 2016	131,310,980	12,799,999	134,706,467				(3,395,487)