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	$ 0.41
Net income	$ 973		973
Share-based compensation	77	77
Other comprehensive income (loss)	531			531
Common stock repurchases	(630)				(630)
Common stock dividends	(179)		(179)
Equity	$ 13,139	21,303	(6,026)	(648)	(1,490)
Common stock dividends, amount per share	$ 0.15
Net income	$ 374		374
Share-based compensation	19	19
Other comprehensive income (loss)	133			133
Common stock repurchases	(250)				(250)
Common stock dividends	(64)		(64)
Equity	13,085	21,322	(5,716)	(781)	(1,740)
Equity	$ 13,268	21,345	(5,489)	(539)	(2,049)
Common stock dividends, amount per share	$ 0.51
Net income	$ 1,337		1,337
Share-based compensation	72	72
Other comprehensive income (loss)	(721)			(721)
Common stock repurchases	(740)				(740)
Common stock dividends	(206)		(206)
Equity	$ 14,316	21,403	(4,682)	84	(2,489)
Common stock dividends, amount per share	$ 0.17
Net income	$ 381		381
Share-based compensation	14	14
Other comprehensive income (loss)	(106)			(106)
Common stock repurchases	(300)				(300)
Common stock dividends	(67)		(67)
Equity	$ 14,450	$ 21,417	$ (4,368)	$ 190	$ (2,789)