CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock	Capital in Excess of Par Value	Treasury Stock, at Cost	Accumulated Other Comprehensive Loss	Retained Earnings
Stockholders' Equity at Dec. 31, 2018	$ 3,751	$ 1	$ 232	$ (568)	$ (448)	$ 4,534
Common Stock Outstanding at Dec. 31, 2018		123,194,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Impact of Adoption of ASC 842	3				0	3
Net Income (Loss)	769					769
Other comprehensive income (loss)	$ (17)				(17)
Common stock repurchase (in shares)	(1,192,820)	(1,193,000)
Common stock repurchase	$ (75)		0	(75)
Stock-based compensation	36		36
Cash dividend declared ($1.40 per share)	(173)					(173)
Stock issued for employee stock purchase plan (in shares)		785,000
Stock issued for employee stock purchase plan	40		40
Stock issued under stock plans (in shares)		214,000
Stock issued under stock plans	(3)		(3)
Stockholders' Equity at Dec. 31, 2019	4,331	$ 1	305	(643)	(465)	5,133
Common Stock Outstanding at Dec. 31, 2019		123,000,000.000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	(1,324)					(1,324)
Other comprehensive income (loss)	$ (29)				(29)
Common stock repurchase (in shares)	(538,078)	(538,000)
Common stock repurchase	$ (31)		0	(31)
Stock-based compensation	34		34
Cash dividend declared ($1.40 per share)	(45)					(45)
Stock issued for employee stock purchase plan (in shares)		1,524,000
Stock issued for employee stock purchase plan	41		41
Stock issued under stock plans (in shares)		231,000
Stock issued under stock plans	(3)		(3)
Stockholders' Equity at Dec. 31, 2020	$ 2,988	$ 1	391	(674)	(494)	3,764
Common Stock Outstanding at Dec. 31, 2020	124,217,590	124,217,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss)	$ 478					478
Other comprehensive income (loss)	232				232
Stock-based compensation	44		44
Adjustments to Additional Paid in Capital, Warrant Issued	16		16
Stock issued for employee stock purchase plan (in shares)		1,255,000
Stock issued for employee stock purchase plan	48		48
Stock issued under stock plans (in shares)		424,000
Stock issued under stock plans	(5)		(5)
Stockholders' Equity at Dec. 31, 2021	$ 3,801	$ 1	$ 494	$ (674)	$ (262)	$ 4,242
Common Stock Outstanding at Dec. 31, 2021	125,905,864	125,906,000