Stock-based Compensation (Tables)

12 Months Ended

Sep. 30, 2016

Sep. 30, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of allocation of share-based compensation costs by plan

A summary of the expense related to stock-based compensation by award type is as follows for the periods presented:

	Fiscal Year Ended September 30,
(In millions)	2016			2015			2014
Stock options expense	$	534		$	697		$	833
Restricted stock awards expense	7,425			5,408			1,741
Before tax stock-based compensation expense	7,959			6,105			2,574
Tax benefit	(2,832		)	—		(a)	—		(a)
After tax stock-based compensation expense	$	5,127		$	6,105		$	2,574

^(a)Tax impact is zero due to the existence of a valuation allowance on our deferred tax assets in prior year periods.

Schedule of assumptions for stock option activity

We used the following assumptions for stock options granted, which derived the weighted average fair value shown, for the period presented:

	Fiscal Year Ended September 30,
	2016			2015	2014
Expected life of options	4.9 years			N/A(a)	5.1 years
Expected volatility	46.49		%	N/A	45.99		%
Expected dividends	—			N/A	—
Weighted average risk-free interest rate	1.36		%	N/A	1.42		%
Weighted average fair value	$	4.03		N/A	$	7.97

^(a) N/A - Not applicable, as no stock options were granted during the period.

Schedule of stock options and SSARs outstanding

Activity related to stock options is as follows for the periods presented:

	2016				2015				2014
	Shares		Weighted- Average Exercise Price		Shares		Weighted- Average Exercise Price		Shares		Weighted- Average Exercise Price
Outstanding at beginning of period	643,907		$	18.13	650,223		$	18.12	560,784		$	33.01
Granted	125,449		9.19		—		—		161,010		19.11
Exercised	—		—		(1,209	)	12.07		(2,788	)	14.29
Expired	(86,606	)	19.70		—		—		(55,811	)	170.32
Forfeited	(10,081	)	10.98		(5,107	)	19.05		(12,972	)	19.85
Outstanding at end of period	672,669		$	16.49	643,907		$	18.13	650,223		$	18.12
Exercisable at end of period	503,594		$	17.76	491,029		$	18.40	355,703		$	19.74
Vested or expected to vest in the future	672,669		$	16.49	643,877		$	18.13	649,773		$	18.12

Schedule of stock options and SSARS outstanding and exercisable

The following table summarizes information about stock options outstanding and exercisable as of September 30, 2016:

	Stock Options Outstanding				Stock Options Exercisable
Range of Exercise Price	Number Outstanding	Weighted Average Contractual Remaining Life (Years)	Weighted Average Exercise Price		Number Exercisable	Weighted Average Contractual Remaining Life (Years)	Weighted Average Exercise Price
$1 - $15	371,983	4.91	$	11.55	253,381	3.71	$	12.28
$16 - $20	158,263	4.99	19.08		107,790	4.94	19.07
$21- $30	142,423	0.81	26.51		142,423	0.81	26.51
$1- $30	672,669	4.06	$	16.49	503,594	3.15	$	17.76

Schedule of nonvested stock awards and performance shares

Activity relating to all restricted stock awards is as follows for the periods presented:

	Fiscal Year Ended September 30,
	2016				2015				2014
	Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value
Beginning of period	956,283		$	18.27	746,567		$	15.76	280,416		$	12.32
Granted (a)	491,443		14.69		410,192		19.01		595,567		18.68
Vested (b)	(127,993	)	18.58		(64,719	)	15.96		(113,320	)	22.55
Forfeited	(63,916	)	10.62		(135,757	)	7.77		(16,096	)	15.93
End of period	1,255,817		$	17.23	956,283		$	18.27	746,567		$	15.76

^(a) The shares granted for the years ended September 30, 2016, 2015 and 2014 include 231,624, 201,157 and 28,690 performance-based restricted shares, respectively. The remaining shares granted are time-based restricted shares.

^(b) No performance-based restricted shares vested during the years ended September 30, 2016, 2015 and 2014.