Pensions, Other Post-employment Benefits and Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule of Net Periodic Benefit Costs

Components of net periodic benefit cost for the three and six months ended June 30, 2016 and 2015 are as follows:

	Pension Benefits						OPEB
	Three Months Ended June 30,						Three Months Ended June 30,
	2016			2015			2016			2015
	(in millions)
Service cost	$	4		$	5		$	—		$	—
Interest cost	17			16			3			4
Expected return on plan assets	(15		)	(18		)	—			—
Amortization of actuarial losses	6			7			—			—
Amortization of prior service credit	—			—			(1		)	(1		)
	$	12		$	10		$	2		$	3

	Pension Benefits						OPEB
	Six Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
	(in millions)
Service cost	$	8		$	10		$	—		$	—
Interest cost	34			32			6			7
Expected return on plan assets	(29		)	(35		)	—			—
Amortization of actuarial losses	11			14			1			2
Amortization of prior service credit	—			—			(2		)	(2		)
	$	24		$	21		$	5		$	7