Condensed Consolidated Statement of Changes in Equity - USD ($) $ in Millions	Total	Common stock and paid-in capital	Accumulated Deficit	Accumulated other comprehensive (loss) income	Treasury stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity	$ 13,494	$ 21,245	$ (6,406)	$ (235)	$ (1,110)
Common stock dividends, amount per share	$ 0.26
Net income	$ 599		599
Share-based compensation	58	58
Other comprehensive income (loss)	398			398
Common stock repurchases	(380)				(380)
Common stock dividends	(115)		(115)
Equity	$ 13,082	21,273	(6,318)	(578)	(1,295)
Common stock dividends, amount per share	$ 0.13
Net income	$ 349		349
Share-based compensation	30	30
Other comprehensive income (loss)	70			70
Common stock repurchases	(195)				(195)
Common stock dividends	(57)		(57)
Equity	13,139	21,303	(6,026)	(648)	(1,490)
Equity	$ 13,268	21,345	(5,489)	(539)	(2,049)
Common stock dividends, amount per share	$ 0.34
Net income	$ 956		956
Share-based compensation	58	58
Other comprehensive income (loss)	(615)			(615)
Common stock repurchases	(440)				(440)
Common stock dividends	(139)		(139)
Equity	$ 13,699	21,379	(5,195)	(225)	(2,260)
Common stock dividends, amount per share	$ 0.17
Net income	$ 582		582
Share-based compensation	24	24
Other comprehensive income (loss)	(309)			(309)
Common stock repurchases	(229)				(229)
Common stock dividends	(69)		(69)
Equity	$ 14,316	$ 21,403	$ (4,682)	$ 84	$ (2,489)