Condensed Consolidating Financial Information (Details 3) (USD $) In Millions, unless otherwise specified	1 Months Ended		3 Months Ended		9 Months Ended
	Aug. 31, 2011	May 31, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Condensed Consolidating Financial Information
Cash flows from operating activities			$ 786	$ 492	$ 1,785	$ 1,222
Cash flows from investing activities
Capital expenditures			(201)	(124)	(646)	(633)
Capital expenditures for discontinued operations			(24)	(13)	(75)	(37)
Investment in marketable security				(199)		(199)
Proceeds from disposal of assets, net			178	4	189	12
Proceeds from disposal of discontinued operations, net			5	84	196	353
Payment for settlement of forward exchange contract, net				(78)		(78)
Other, net			7	6	32	(27)
Net cash used in investing activities			(35)	(320)	(304)	(609)
Cash flows from financing activities
Changes in short-term borrowings, net				2	(260)	58
Proceeds from debt			1,493		1,493	5
Repayments of debt			(264)	(23)	(584)	(272)
Proceeds from restricted cash investments			106		298
Deposits to restricted cash investments			(42)		(158)
Distribution of qualifying additional paid-in capital	(508)	(508)		(254)	(278)	(508)
Other, net					(8)	(4)
Net cash provided by (used in) financing activities			1,286	(275)	503	(721)
Net increase (decrease) in cash and cash equivalents			2,037	(103)	1,984	(108)
Cash and cash equivalents at beginning of period			3,964	3,349	4,017	3,354
Cash and cash equivalents at end of period			6,001	3,246	6,001	3,246
Parent Guarantor
Condensed Consolidating Financial Information
Cash flows from operating activities					(58)	(41)
Cash flows from investing activities
Investing activities with affiliates, net					(165)	(875)
Net cash used in investing activities					(165)	(875)
Cash flows from financing activities
Distribution of qualifying additional paid-in capital					(278)	(508)
Financing activities with affiliates, net					523	1,387
Other, net					(16)
Net cash provided by (used in) financing activities					229	879
Net increase (decrease) in cash and cash equivalents					6	(37)
Cash and cash equivalents at beginning of period					3	38
Cash and cash equivalents at end of period			9	1	9	1
Subsidiary Issuer
Condensed Consolidating Financial Information
Cash flows from operating activities					(842)	(397)
Cash flows from investing activities
Investing activities with affiliates, net					(1,986)	(1,333)
Other, net					24	(29)
Net cash used in investing activities					(1,962)	(1,362)
Cash flows from financing activities
Changes in short-term borrowings, net						58
Proceeds from debt					1,493	5
Repayments of debt					(30)	(177)
Financing activities with affiliates, net					2,577	371
Other, net						(3)
Net cash provided by (used in) financing activities					4,040	254
Net increase (decrease) in cash and cash equivalents					1,236	(1,505)
Cash and cash equivalents at beginning of period					2,793	2,041
Cash and cash equivalents at end of period			4,029	536	4,029	536
Other Subsidiaries
Condensed Consolidating Financial Information
Cash flows from operating activities					2,685	1,660
Cash flows from investing activities
Capital expenditures					(646)	(633)
Capital expenditures for discontinued operations					(75)	(37)
Investment in marketable security						(199)
Proceeds from disposal of assets, net					189	12
Proceeds from disposal of discontinued operations, net					196	353
Payment for settlement of forward exchange contract, net						(78)
Investing activities with affiliates, net					(3,027)	(1,021)
Other, net					8	2
Net cash used in investing activities					(3,355)	(1,601)
Cash flows from financing activities
Changes in short-term borrowings, net					(260)
Repayments of debt					(554)	(95)
Proceeds from restricted cash investments					298
Deposits to restricted cash investments					(158)
Financing activities with affiliates, net					2,078	1,471
Other, net					8	(1)
Net cash provided by (used in) financing activities					1,412	1,375
Net increase (decrease) in cash and cash equivalents					742	1,434
Cash and cash equivalents at beginning of period					1,221	1,275
Cash and cash equivalents at end of period			1,963	2,709	1,963	2,709
Consolidating adjustments
Cash flows from investing activities
Investing activities with affiliates, net					5,178	3,229
Net cash used in investing activities					5,178	3,229
Cash flows from financing activities
Financing activities with affiliates, net					(5,178)	(3,229)
Net cash provided by (used in) financing activities					$ (5,178)	$ (3,229)