Commitments and Contingencies (Litigation and Environmental) (Narrative) (Details) In Millions, unless otherwise specified	6 Months Ended			1 Months Ended	6 Months Ended
	Mar. 31, 2014	Mar. 31, 2014 Environmental [Member] USD ($)	Sep. 30, 2013 Environmental [Member] USD ($)	Sep. 30, 2010 Alleged Anticompete Litigation [Member] BRL	Mar. 31, 2014 Alleged Anticompete Litigation [Member] USD ($)	Mar. 31, 2014 Alleged Anticompete Litigation [Member] BRL
Loss Contingencies [Line Items]
Civil fines imposed				179.2	$ 79.0
Provision for litigation					0
Maximum of loss contingency range subject to interest					79.0	179.2
Approximate number of sites on which settlement has not been reached		34
Accrual for environmental loss contingencies		85.4	86.7
Accrual for environmental loss contingencies, Maximum payout period, years	30 years
Accrual for environmental loss contingencies, Minimum exposure		85
Accrual for environmental loss contingencies, Maximum exposure		$ 99