Stockholders' Equity (Tables)

9 Months Ended

Jun. 30, 2018

Equity [Abstract]

Schedule of Activity in Noncontrolling Interests

The following table illustrates the noncontrolling interest activity for the periods presented:

	Nine Months Ended June 30
	2018			2017
	(In millions)
Noncontrolling interests at beginning of period	$	121		$	98
Net income (loss) attributable to noncontrolling interests		31			18
Foreign currency translation adjustment attributable to    noncontrolling interests, net of tax		—			—
Dividends declared to noncontrolling interests		(22	)		(14	)
Contribution from noncontrolling interest		—			2
Noncontrolling interests at end of period	$	130		$	104