Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule of net benefit costs

The following table shows the components of net periodic cost:

	Pension Benefits						Other Postretirement and Postemployment Benefits
(in millions)	2016			2015			2016			2015
Three Months Ended March 31,
Service cost	$	—		$	—		$	17		$	16
Interest cost	229			221			37			35
Expected return on plan assets	(226		)	(220		)	(18		)	(20		)
Amortization of prior service credit	—			—			(7		)	(7		)
Recognized net actuarial loss	59			58			6			6
Net periodic cost	$	62		$	59		$	35		$	30