Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2016

Pension Plan, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Components of Pension Expense for Defined Benefit Pension Plan

Three Months Ended March 31,	2016			2015
	(in millions)
Service cost – benefits earned during the period	$	1		$	1
Interest cost on projected benefit obligation	12			12
Expected return on assets	(14		)	(16		)
Amortization of net actuarial loss	7			7
Pension expense	$	6		$	4

Other Postretirement Benefit Plan, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Components of Pension Expense for Defined Benefit Pension Plan

Three Months Ended March 31,	2016			2015
	(in millions)
Interest cost	$	1		$	1
Amortization of reduction in liability resulting from plan amendment	(2		)	—
Net periodic postretirement benefit cost	$	(1	)	$	1