CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) shares in Millions, $ in Millions		Total	Common Stock Class A common stock		Common Stock Class B common stock	Additional Paid-In Capital	Accumulated Loss	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2015			180	[1]	719
Beginning balance at Dec. 31, 2015		$ 3,660	$ 2		$ 7	$ 12,910	$ (11,032)	$ (1,219)	$ 2,992
Increase (Decrease) in Stockholders' Equity
Dividends and distributions paid to noncontrolling interests	[2]	(50)							(50)
Net (loss) income	[1]	(14)					(56)		42
Other comprehensive (loss) income		(64)						(66)	2
Adjustment to redemption value of redeemable noncontrolling interest		4				4
Stock compensation expense		115				115
Stock activity under stock compensation plans and other (in shares)			3		5
Stock activity under stock compensation plans and other		(40)				(40)
Ending balance (in shares) at Mar. 31, 2016			183		724
Ending balance at Mar. 31, 2016		3,611	$ 2		$ 7	12,989	(11,088)	(1,285)	2,986
Beginning balance (in shares) at Dec. 31, 2016			368		544
Beginning balance at Dec. 31, 2016		4,131	$ 4		$ 5	13,149	(10,612)	(1,326)	2,911
Increase (Decrease) in Stockholders' Equity
Dividends and distributions paid to noncontrolling interests	[2]	(35)							(35)
Net (loss) income	[1]	71					36		35
Other comprehensive (loss) income		91						88	3
Adjustment to redemption value of redeemable noncontrolling interest		1				1
Stock compensation expense		65				65
Stock activity under stock compensation plans and other (in shares)			6
Stock activity under stock compensation plans and other		(47)				(47)
Ending balance (in shares) at Mar. 31, 2017			374		544
Ending balance at Mar. 31, 2017		$ 4,277	$ 4		$ 5	$ 13,168	$ (10,576)	$ (1,238)	$ 2,914

[1] The total net income (loss) presented in the unaudited consolidated statements of equity for the three months ended March 31, 2017 and 2016 is $8 million lower and $8 million higher, respectively, than the amounts presented in the unaudited consolidated statements of operations due to the net income attributable to the redeemable noncontrolling interest not included in equity.

[2] The total distribution presented in the unaudited consolidated statements of equity for the three months ended March 31, 2017 and 2016 excludes $8 million in distributions paid to redeemable non-controlling interest not included in equity.