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	$ 13,268	$ 21,345	$ (5,489)	$ (539)	$ (2,049)
Common stock dividends, amount per share	$ 0.17
Net income	$ 374		374
Share-based compensation	34	34
Other comprehensive income (loss)	(306)			(306)
Common stock repurchases	(211)				(211)
Common stock dividends	(70)		(70)
Equity	13,699	21,379	(5,195)	(225)	(2,260)
Equity	$ 14,416	21,438	(4,057)	123	(3,088)
Common stock dividends, amount per share	$ 0.19
Net income	$ (319)		(319)
Share-based compensation	32	32
Other comprehensive income (loss)	(583)			(583)
Common stock repurchases	(104)				(104)
Common stock dividends	(72)		(72)
Equity	$ 13,519	$ 21,470	$ (5,465)	$ 706	$ (3,192)