Consolidated Condensed Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Cash and cash equivalents ($48 and $118 attributable to VIEs)	$ 244	$ 906
Accounts receivable, net of allowance of $3 and $2	3	2
Restricted cash, current ($110 and $132 attributable to VIEs)	167	216
Property, plant and equipment, net ($4,024 and $4,062 attributable to VIEs)	13,407	13,012
Restricted cash, net of current portion ($17 and $11 attributable to VIEs)	17	12
Other assets ($107 and $166 attributable to VIEs)	951	1,040
Debt, current portion ($165 and $166 attributable to VIEs)	205	221
Debt, net of current portion ($3,055 and $3,143 attributable to VIEs)	$ 11,672	$ 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	359,542,565	356,755,747
Common Stock, Shares, Outstanding	359,027,395	356,662,004
Treasury Stock, Shares	515,170	93,743
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents ($48 and $118 attributable to VIEs)	$ 48	$ 118
Restricted cash, current ($110 and $132 attributable to VIEs)	110	132
Property, plant and equipment, net ($4,024 and $4,062 attributable to VIEs)	4,024	4,062
Restricted cash, net of current portion ($17 and $11 attributable to VIEs)	17	11
Other assets ($107 and $166 attributable to VIEs)	107	166
Debt, current portion ($165 and $166 attributable to VIEs)	165	166
Debt, net of current portion ($3,055 and $3,143 attributable to VIEs)	$ 3,055	$ 3,143