Consolidated Condensed Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Cash and cash equivalents ($70 and $242 attributable to VIEs)	$ 515	$ 941
Allowance for Doubtful Accounts Receivable, Current	5	5
Restricted cash, current ($115 and $100 attributable to VIEs)	195	203
Property, plant and equipment, net ($4,568 and $4,191 attributable to VIEs)	13,598	12,995
Restricted cash, net of current portion ($70 and $68 attributable to VIEs)	71	69
Debt, current portion ($129 and $140 attributable to VIEs)	189	204
Debt, net of current portion ($3,322 and $2,923 attributable to VIEs)	11,286	10,908
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	499,765,622	497,841,056
Common Stock, Shares, Outstanding	423,242,107	429,038,988
Treasury Stock, Shares	76,523,515	68,802,068
Variable Interest Entity, Primary Beneficiary [Member]
Cash and cash equivalents ($70 and $242 attributable to VIEs)	70	242
Restricted cash, current ($115 and $100 attributable to VIEs)	115	100
Property, plant and equipment, net ($4,568 and $4,191 attributable to VIEs)	4,568	4,191
Restricted cash, net of current portion ($70 and $68 attributable to VIEs)	70	68
Debt, current portion ($129 and $140 attributable to VIEs)	129	140
Debt, net of current portion ($3,322 and $2,923 attributable to VIEs)	$ 3,322	$ 2,923