Weighted Average Common Shares

6 Months Ended

Mar. 31, 2018

Weighted Average Number of Shares Outstanding Reconciliation [Abstract]

Weighted Average Common Shares

Reconciliations of weighted-average shares for basic and diluted earnings per common share follow. Earnings allocated to participating securities were inconsequential.

	Three Months Ended March 31,		Six Months Ended March 31,
	2017	2018	2017	2018
Basic shares outstanding	643.6	632.6	643.2	635.4
Dilutive shares	1.2	3.4	1.3	2.9
Diluted shares outstanding	644.8	636.0	644.5	638.3