Employee Benefits (Tables)

9 Months Ended

Sep. 30, 2015

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Components of Net Periodic Benefit Cost

The net periodic benefit cost was:

	2015						2014
	Pension benefits						Pension benefits
(in millions)	Qualified			Non-qualified	Other benefits		Qualified		Non-qualified	Other benefits
Quarter ended September 30,
Service cost	$	1		—	1		1		—	1
Interest cost	107			5	11		116		6	12
Expected return on plan assets	(161		)	—	(8	)	(157	)	—	(9	)
Amortization of net actuarial loss (gain)	27			5	(1	)	22		4	(7	)
Amortization of prior service credit	—			—	(1	)	—		—	(1	)
Settlement loss	—			—	—		—		—	—
Net periodic benefit cost (income)	$	(26	)	10	2		(18	)	10	(4	)
Nine months ended September 30,
Service cost	$	2		—	5		1		—	5
Interest cost	321			18	32		349		20	32
Expected return on plan assets	(483		)	—	(26	)	(472	)	—	(27	)
Amortization of net actuarial loss (gain)	81			14	(3	)	68		9	(21	)
Amortization of prior service credit	—			—	(2	)	—		—	(2	)
Settlement loss	—			13	—		—		2	—
Net periodic benefit cost (income)	$	(79	)	45	6		(54	)	31	(13	)