Consolidated Balance Sheets Consolidated Balance Sheets Parentheticals (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Cash and cash equivalents ($242 and $109 attributable to VIEs)	$ 941	$ 1,284
Accounts Receivable, allowance for doubtful accounts	5	6
Restricted cash, current ($100 and $53 attributable to VIEs)	203	193
Property, plant and equipment, net ($4,191 and $4,192 attributable to VIEs)	12,995	13,005
Restricted cash, net of current portion ($68 and $59 attributable to VIEs)	69	60
Debt, current portion ($140 and $39 attributable to VIEs)	204	115
Debt, net of current portion ($2,923 and $2,660 attributable to VIEs)	10,908	10,635
Preferred Stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred Stock, authorized shares (in shares)	100,000,000	100,000,000
Preferred Stock, issued shares (in shares)	0	0
Preferred Stock, outstanding shares (in shares)	0	0
Common Stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common Stock, authorized shares (in shares)	1,400,000,000	1,400,000,000
Common Stock, issued shares (in shares)	497,841,056	492,495,100
Common Stock, outstanding shares (in shares)	429,038,988	457,048,970
Treasury Stock, shares (in shares)	68,802,068	35,446,130
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents ($242 and $109 attributable to VIEs)	242	109
Restricted cash, current ($100 and $53 attributable to VIEs)	100	53
Property, plant and equipment, net ($4,191 and $4,192 attributable to VIEs)	4,191	4,192
Restricted cash, net of current portion ($68 and $59 attributable to VIEs)	68	59
Debt, current portion ($140 and $39 attributable to VIEs)	140	39
Debt, net of current portion ($2,923 and $2,660 attributable to VIEs)	$ 2,923	$ 2,660