Condensed Consolidated Statements of Shareholders’ Equity (Unaudited) - USD ($) $ in Millions		Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock
Balance at beginning of period at Dec. 31, 2020		$ 3,441	$ 1	$ 1,655	$ 94	$ 1,691	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		(35)					(35)
Share-based compensation expense, net of forfeitures		11		11
Withholding tax on share-based compensation		(5)		(5)
Other comprehensive income (loss)		(9)			(9)
Cash dividends		(629)				(629)
Net income		763				763
Balance at end of period at Jun. 30, 2021		3,537	1	1,661	85	1,825	(35)
Balance at beginning of period at Mar. 31, 2021		3,308	1	1,657	80	1,570	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		(35)					(35)
Share-based compensation expense, net of forfeitures		4		4
Other comprehensive income (loss)		5			5
Cash dividends	[1]	(95)				(95)
Net income		350				350
Balance at end of period at Jun. 30, 2021		3,537	1	1,661	85	1,825	(35)
Balance at beginning of period at Dec. 31, 2021		3,093	1	1,672	61	1,727	(368)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		(204)					(204)
Treasury stock issued (in shares)		1					1
Share-based compensation expense, net of forfeitures		19		19
Withholding tax on share-based compensation		(12)		(12)
Other comprehensive income (loss)		(131)			(131)
Cash dividends		(243)				(243)
Net income		510				510
Balance at end of period at Jun. 30, 2022		3,033	1	1,679	(70)	1,994	(571)
Balance at beginning of period at Mar. 31, 2022		3,089	1	1,672	(11)	1,905	(478)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock repurchased		(94)					(94)
Treasury stock issued (in shares)		1					1
Share-based compensation expense, net of forfeitures		7		7
Other comprehensive income (loss)		(59)			(59)
Cash dividends	[1]	(120)				(120)
Net income		209				209
Balance at end of period at Jun. 30, 2022		$ 3,033	$ 1	$ 1,679	$ (70)	$ 1,994	$ (571)

[1] Cash dividends declared were $0.95 per share and $0.70 per share during the three months ended June 30, 2022 and 2021, respectively.