Other Current Assets (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2012
Other Assets [Abstract]
Financing Receivable, Allowance for Credit Losses			$ 11	$ 15
Unrealized gains on derivative contracts			897	969
Deferred receivables consideration			511	757
Customer Omnibus Receivable			1,532	1,298
Financing Receivable, Net			402	576
Other current assets			2,714	2,750
Total other current assets			6,056	6,350
Provision for Other Credit Losses			4
Allowance for credit losses adjustment			8
Interest on financing receivables	$ 15	$ 12	$ 23	$ 26	$ 26