Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 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 June 30,
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
Six Months Ended June 30,
Service cost	$	—		$	—		$	34		$	32
Interest cost	458			442			74			70
Expected return on plan assets	(452		)	(440		)	(36		)	(40		)
Amortization of prior service credit	—			—			(14		)	(14		)
Recognized net actuarial loss	118			116			12			12
Net periodic cost	$	124		$	118		$	70		$	60