Financial Instruments (Fair Value Measurements) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2013 Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2013 Foreign Exchange Contract [Member] Assets [Member] Fair Value, Inputs, Level 2 [Member]	Sep. 30, 2013 Foreign Exchange Contract [Member] Assets [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2013 Foreign Exchange Contract [Member] Other Liabilities [Member] Fair Value, Inputs, Level 2 [Member]	Sep. 30, 2013 Foreign Exchange Contract [Member] Other Liabilities [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2013 Commodity Contract [Member] Assets [Member] Fair Value, Inputs, Level 2 [Member]	Sep. 30, 2013 Commodity Contract [Member] Assets [Member] Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2013 Commodity Contract [Member] Other Liabilities [Member] Fair Value, Inputs, Level 2 [Member]	Sep. 30, 2013 Commodity Contract [Member] Other Liabilities [Member] Fair Value, Inputs, Level 2 [Member]
Derivatives, Fair Value [Line Items]
Collateral posted to counterparties	$ 0
Maximum collateral balance could have been required to post	5
Fair value of long-term debt			4,456
Fair value of long-term debt compared with carrying value		(370)
Fair value of derivative assets				18	18			4	2
Fair value of derivative liabilities						$ 15	$ 17			$ 5	$ 8