Significant Accounting Policies (Basis to Determine Earned Net Earnings Growth Restricted Stock Units) (Details) - Net Earnings Growth Performance Multiplier	12 Months Ended
	Sep. 30, 2016
5%
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Earnings Growth Performance Multiplier	50.00%
10%
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Earnings Growth Performance Multiplier	100.00%
15%
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Earnings Growth Performance Multiplier	150.00%
20%
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net Earnings Growth Performance Multiplier	200.00%