Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Cash and cash equivalents ($69 and $118 attributable to VIEs)	$ 215	$ 906
Accounts receivable, net of allowance of $4 and $2	4	2
Restricted cash, current ($96 and $132 attributable to VIEs)	148	216
Property, plant and equipment, net ($3,993 and $4,062 attributable to VIEs)	13,341	13,012
Restricted cash, net of current portion ($20 and $11 attributable to VIEs)	20	12
Other assets ($115 and $119 attributable to VIEs)	887	1,040
Debt, current portion ($164 and $166 attributable to VIEs)	197	221
Debt, net of current portion ($3,031 and $3,096 attributable to VIEs)	$ 11,644	$ 11,716
Preferred Stock, Par or Stated Value Per Share	$ 0.001	$ 0.001
Preferred Stock, Shares Authorized	100,000,000	100,000,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Common Stock, Par or Stated Value Per Share	$ 0.001	$ 0.001
Common Stock, Shares Authorized	1,400,000,000	1,400,000,000
Common Stock, Shares, Issued	359,662,911	356,755,747
Common Stock, Shares, Outstanding	359,139,948	356,662,004
Treasury Stock, Shares	522,963	93,743
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents ($69 and $118 attributable to VIEs)	$ 69	$ 118
Restricted cash, current ($96 and $132 attributable to VIEs)	96	132
Property, plant and equipment, net ($3,993 and $4,062 attributable to VIEs)	3,993	4,062
Restricted cash, net of current portion ($20 and $11 attributable to VIEs)	20	11
Other assets ($115 and $119 attributable to VIEs)	115	119
Debt, current portion ($164 and $166 attributable to VIEs)	164	166
Debt, net of current portion ($3,031 and $3,096 attributable to VIEs)	$ 3,031	$ 3,143