Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Dec. 31, 2013

Compensation and Retirement Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures

The components of net periodic benefit cost are as follows:

	Pension Benefits						Other Postretirement Benefits
	Three Months Ended December 31,						Three Months Ended December 31,
	2013			2012			2013			2012
	(in millions)
Service cost	$	11		$	10		$	—		$	—
Interest cost	10			9			—			—
Expected return on assets	(17		)	(16		)	—			—
Amortization of:
Prior service credit	(2		)	(2		)	(1		)	(1		)
Actuarial loss	—			7			—			—
Settlement loss	1			—			—			—
Total net periodic benefit cost	$	3		$	8		$	(1	)	$	(1	)