CONSOLIDATED STATEMENTS OF SHAREHOLDERS' (DEFICIT) EQUITY - USD ($) $ in Millions	Total	Common Stock Class A Common Stock		Additional Paid-in- Capital	Retained Earnings	Treasury Stock, at Cost	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 28, 2012	$ (1,285)	$ 5		$ 2,585	$ 3,509	$ (7,340)	$ (44)
Beginning balance, shares at Dec. 28, 2012		310,900,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	626	$ 0		0	626	0	0
Other comprehensive income (loss)	0	0		0	0	0	0
Dividends	(195)	0		0	(195)	0	0
Employee stock plan	269	$ 0		131	(103)	241	0
Employee stock plan issuance, shares		7,100,000
Purchase of treasury stock	(830)	$ 0		0	0	(830)	0
Purchase of treasury stock, shares		(20,000,000)
Ending balance at Dec. 31, 2013	(1,415)	$ 5		2,716	3,837	(7,929)	(44)
Ending balance, shares at Dec. 31, 2013		298,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	753	$ 0		0	753	0	0
Other comprehensive income (loss)	(26)	0		0	0	0	(26)
Dividends	(223)	0		0	(223)	0	0
Employee stock plan	211	$ 0		86	(81)	206	0
Employee stock plan issuance, shares		6,100,000
Purchase of treasury stock	(1,500)	$ 0		0	0	(1,500)	0
Purchase of treasury stock, shares		(24,200,000)
Ending balance at Dec. 31, 2014	(2,200)	$ 5		2,802	4,286	(9,223)	(70)
Ending balance, shares at Dec. 31, 2014		279,900,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	859	$ 0		0	859	0	0
Other comprehensive income (loss)	(126)	0		0	0	0	(126)
Dividends	(253)	0		0	(253)	0	0
Employee stock plan	70	$ 0		19	(14)	65	0
Employee stock plan issuance, shares		2,100,000
Purchase of treasury stock	(1,940)	$ 0		0	0	(1,940)	0
Purchase of treasury stock, shares		(25,700,000)
Ending balance at Dec. 31, 2015	$ (3,590)	$ 5		$ 2,821	$ 4,878	$ (11,098)	$ (196)
Ending balance, shares at Dec. 31, 2015	265,300,000.0	256,300,000	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, authorized (in shares)	800,000,000
Common stock, par value (in USD per share)	$ 0.01
Preferred authorized (in shares)	10,000,000
Preferred stock outstanding (in shares)	0

[1] Our restated certificate of incorporation authorizes 800 million shares of our common stock, with a par value of $.01 per share and 10 million shares of preferred stock, without par value. At year-end 2015, we had 265.3 million of these authorized shares of our common stock and no preferred stock outstanding.