Retirement Benefits (Tables)

6 Months Ended

Feb. 28, 2017

Compensation and Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost

Components of net periodic pension costs for the defined benefit pension plans (in millions):

	Three Months Ended						Six Months Ended
	February 28, 2017			February 29, 2016			February 28, 2017			February 29, 2016
Service costs	$	—		$	—		$	2		$	2
Interest costs	43			77			86			159
Expected returns on plan assets	(36		)	(62		)	(73		)	(127		)
Curtailments	2			—			2			—
Total net periodic pension costs	$	9		$	15		$	17		$	34