Guarantee of Securities of Subsidiaries Supplemental Condensed Statements of Cash Flow (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended												3 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Parent Company [Member]	Jun. 30, 2012 Parent Company [Member]	Jun. 30, 2013 Guarantor Subsidiaries [Member]	Jun. 30, 2012 Guarantor Subsidiaries [Member]	Jun. 30, 2013 Subsidiary Issuer [Member]	Jun. 30, 2012 Subsidiary Issuer [Member]	Jun. 30, 2013 Non-Guarantor Subsidiaries [Member]	Jun. 30, 2012 Non-Guarantor Subsidiaries [Member]	Jun. 30, 2013 Consolidation, Eliminations [Member]	Jun. 30, 2012 Consolidation, Eliminations [Member]	Mar. 31, 2013 Scenario, Previously Reported [Member] Parent Company [Member]	Sep. 30, 2012 Scenario, Previously Reported [Member] Parent Company [Member]	Dec. 31, 2012 Scenario, Previously Reported [Member] Parent Company [Member]	Sep. 30, 2012 Scenario, Previously Reported [Member] Guarantor Subsidiaries [Member]	Dec. 31, 2012 Scenario, Previously Reported [Member] Guarantor Subsidiaries [Member]	Mar. 31, 2013 Scenario, Previously Reported [Member] Subsidiary Issuer [Member]	Sep. 30, 2012 Scenario, Previously Reported [Member] Subsidiary Issuer [Member]	Dec. 31, 2012 Scenario, Previously Reported [Member] Subsidiary Issuer [Member]	Mar. 31, 2013 Scenario, Previously Reported [Member] Non-Guarantor Subsidiaries [Member]	Sep. 30, 2012 Scenario, Previously Reported [Member] Non-Guarantor Subsidiaries [Member]	Dec. 31, 2012 Scenario, Previously Reported [Member] Non-Guarantor Subsidiaries [Member]	Mar. 31, 2013 Scenario, Previously Reported [Member] Consolidation, Eliminations [Member]	Sep. 30, 2012 Scenario, Previously Reported [Member] Consolidation, Eliminations [Member]	Dec. 31, 2012 Scenario, Previously Reported [Member] Consolidation, Eliminations [Member]	Mar. 31, 2013 Scenario, As Revised [Member] Parent Company [Member]	Sep. 30, 2012 Scenario, As Revised [Member] Parent Company [Member]	Dec. 31, 2012 Scenario, As Revised [Member] Parent Company [Member]	Sep. 30, 2012 Scenario, As Revised [Member] Guarantor Subsidiaries [Member]	Dec. 31, 2012 Scenario, As Revised [Member] Guarantor Subsidiaries [Member]	Mar. 31, 2013 Scenario, As Revised [Member] Subsidiary Issuer [Member]	Sep. 30, 2012 Scenario, As Revised [Member] Subsidiary Issuer [Member]	Dec. 31, 2012 Scenario, As Revised [Member] Subsidiary Issuer [Member]	Mar. 31, 2013 Scenario, As Revised [Member] Non-Guarantor Subsidiaries [Member]	Sep. 30, 2012 Scenario, As Revised [Member] Non-Guarantor Subsidiaries [Member]	Dec. 31, 2012 Scenario, As Revised [Member] Non-Guarantor Subsidiaries [Member]	Mar. 31, 2013 Scenario, As Revised [Member] Consolidation, Eliminations [Member]	Sep. 30, 2012 Scenario, As Revised [Member] Consolidation, Eliminations [Member]	Dec. 31, 2012 Scenario, As Revised [Member] Consolidation, Eliminations [Member]
Guarantor Obligations [Line Items]
Net Cash Provided by (Used in) Operating Activities	$ 1,717	$ 1,013	$ 699	$ 363	$ 0	$ 0	$ 29	$ (554)	$ 2,075	$ 1,898	$ (1,086)	$ (694)	$ 325	$ 413	$ 1,108	$ (29)	$ (19)	$ 6	$ (324)	$ (305)	$ 968	$ 2,997	$ 3,624			$ (1,613)	$ 335	$ 725	$ 1,014	$ 0	$ 0	$ 11	$ (429)	$ (404)	$ 953	$ 2,761	$ 3,792			$ (1,607)
Net Cash Provided by (Used in) Investing Activities	(1,100)	(5,790)	825	(5,555)	0	0	(328)	16	(2,670)	(1,071)	1,073	820	964	(1,812)	(2,074)	(9)	(25)	(1)	6,359	6,362	(1,093)	(5,168)	(3,895)	14	(5,735)	(5,452)	899	(2,204)	(2,517)	0	0	(172)	(291)	(941)	(1,270)	(5,289)	(4,665)	427	1,419	3,039
Net Cash Provided by (Used in) Financing Activities	$ (294)	$ 5,043	$ (1,419)	$ 5,214	$ 0	$ 0	$ 255	$ 581	$ 857	$ (626)	$ 13	$ (126)	$ (1,174)	$ 1,452	$ 967	$ 38	$ 44	$ (50)	$ (5,964)	$ (6,012)	$ 453	$ 2,398	$ 520	$ 518	$ 6,865	$ 7,065	$ (1,119)	$ 1,532	$ 1,504	$ 0	$ 0	$ 116	$ 791	$ 1,390	$ 645	$ 2,755	$ 1,122	$ 105	$ (289)	$ (1,432)