Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Comprehensive Loss [Member]
Balance, Beginning at Dec. 31, 2018	$ 1,700.0	$ 153.0	$ (378.0)	$ 458.0	$ 1,613.0	$ (146.0)
Balance, Beginning, Shares at Dec. 31, 2018		153,000,000	16,000,000
Net income	(5.0)				(5.0)
Payment of cash dividends	(65.0)				(65.0)
Issuance of shares for employee stock plans and stock-based compensation			0
Issuance of shares for employee stock plans and stock-based compensation, amount	(3.0)		$ (10.0)	(13.0)
Common stock, Shares acquired		(23,000,000)
Common stock, Value, Shares acquired		$ (23.0)
Treasury Stock, Shares, Acquired			2,000,000
Treasury Stock, Value, Acquired, Cost Method	(638.0)		$ (38.0)
Stock Repurchased and Retired During Period, Value					(577.0)
Compensation expense associated with stock awards	9.0			9.0
Other comprehensive loss	(7.0)					(7.0)
Balance, Ending, Shares at Dec. 31, 2019		130,000,000	18,000,000
Balance, Ending at Dec. 31, 2019	$ 991.0	$ 130.0	$ (406.0)	454.0	966.0	(153.0)
Common Stock, Dividends, Per Share, Cash Paid	$ 0.135
Net income	$ 499.0				499.0
Payment of cash dividends	(65.0)				(65.0)
Issuance of shares for employee stock plans and stock-based compensation			(1,000,000)
Issuance of shares for employee stock plans and stock-based compensation, amount	(3.0)		$ (9.0)	(12.0)
Common stock, Shares acquired		(6,000,000)
Common stock, Value, Shares acquired		$ (6.0)
Treasury Stock, Shares, Acquired			0
Treasury Stock, Value, Acquired, Cost Method	(200.0)		$ 0.0
Stock Repurchased and Retired During Period, Value					(194.0)
Compensation expense associated with stock awards	12.0			12.0
Noncontrolling Interest, Change in Redemption Value	2.0			2.0
Other comprehensive loss	2.0					2.0
Balance, Ending, Shares at Dec. 31, 2020		124,000,000	17,000,000
Balance, Ending at Dec. 31, 2020	$ 1,234.0	$ 124.0	$ (397.0)	452.0	1,206.0	(151.0)
Common Stock, Dividends, Per Share, Cash Paid	$ 0.145
Treasury Stock, Value	$ 397.0
Net income	1,377.0
Payment of cash dividends	(66.0)				(66.0)
Issuance of shares for employee stock plans and stock-based compensation			0
Issuance of shares for employee stock plans and stock-based compensation, amount	(5.0)		$ (7.0)	(12.0)
Common stock, Shares acquired		(21,000,000)
Common stock, Value, Shares acquired		$ (21.0)
Treasury Stock, Shares, Acquired			0
Treasury Stock, Value, Acquired, Cost Method	(1,300.0)		$ 0.0
Stock Repurchased and Retired During Period, Value					(1,279.0)
Compensation expense associated with stock awards	17.0			17.0
Noncontrolling Interest, Change in Redemption Value	1.0
Other comprehensive loss	$ (23.0)					(23.0)
Balance, Ending, Shares at Dec. 31, 2021	85,636,154	102,000,000	17,000,000
Balance, Ending at Dec. 31, 2021	$ 1,235.0	$ 102.0		$ 458.0	$ 1,239.0	$ (174.0)
Treasury Stock, Value	$ 390.0		$ 390.0