Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Discontinued operations pre tax income loss				$ (12)
Tax benefit on business disposal				115
Discontinued Operation gain loss on disposal				(14)
Revenues from discontinued operations			0	49
Pre-tax losses from discontinued operations			(383)	(23)
Income tax provision			1	13
Net earnings losses from discontinued operations	(3)	0	(382)	(10)
Tax benefit on disposal amount recognized			75
Offset to qualifying future cash taxes			40
Earnout dispute charge			(383)
Disposed Business [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Tax benefit from contingent consideration			$ 135