CONSOLIDATED STATEMENTS OF STOCKHOLDERS' (DEFICIT) EQUITY - USD ($) $ in Millions	Total	Class A Common Stock Class A Common Stock		Additional Paid-in- Capital	Retained Earnings	Treasury Stock, at Cost	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2020	$ 430	$ 5		$ 5,851	$ 9,206	$ (14,497)	$ (135)
Beginning balance (in shares) at Dec. 31, 2020		324,400,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,099				1,099
Other comprehensive income (loss)	(207)						(207)
Stock-based compensation plans (in shares)		1,900,000
Stock-based compensation plans	92			41		51
Ending balance at Dec. 31, 2021	1,414	$ 5		5,892	10,305	(14,446)	(342)
Ending balance (in shares) at Dec. 31, 2021		326,300,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,358				2,358
Other comprehensive income (loss)	(387)						(387)
Dividends	(321)				(321)
Stock-based compensation plans (in shares)		1,100,000
Stock-based compensation plans	104			73		31
Purchase of treasury stock	(2,600)					(2,600)
Purchase of treasury stock (in shares)		(16,800,000)
Ending balance at Dec. 31, 2022	568	$ 5		5,965	12,342	(17,015)	(729)
Ending balance (in shares) at Dec. 31, 2022		310,600,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,083				3,083
Other comprehensive income (loss)	82						82
Dividends	(587)				(587)
Stock-based compensation plans (in shares)		1,400,000
Stock-based compensation plans	126			86		40
Purchase of treasury stock	(3,954)					(3,954)
Purchase of treasury stock (in shares)		(21,500,000)
Ending balance at Dec. 31, 2023	$ (682)	$ 5		$ 6,051	$ 14,838	$ (20,929)	$ (647)
Ending balance (in shares) at Dec. 31, 2023	290,539,975	290,500,000	[1]

[1] Our restated certificate of incorporation authorizes 800,000,000 shares of our common stock, with a par value of $0.01 per share and 10,000,000 shares of preferred stock, without par value. At year-end 2023, we had 290,539,975 of these authorized shares of our common stock and no preferred stock outstanding.