Employee Benefits (Tables)

6 Months Ended

Jun. 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 June 30,
Service cost	$	1		—	2		—		—	2
Interest cost	107			7	10		117		8	9
Expected return on plan assets	(161		)	—	(9	)	(158	)	—	(9	)
Amortization of net actuarial loss (gain)	27			4	(1	)	23		2	(7	)
Amortization of prior service credit	—			—	—		—		—	—
Settlement loss	—			—	—		—		2	—
Net periodic benefit cost (income)	$	(26	)	11	2		(18	)	12	(5	)
Six months ended June 30,
Service cost	$	1		—	4		—		—	4
Interest cost	214			13	21		233		14	20
Expected return on plan assets	(322		)	—	(18	)	(315	)	—	(18	)
Amortization of net actuarial loss (gain)	54			9	(2	)	46		5	(14	)
Amortization of prior service credit	—			—	(1	)	—		—	(1	)
Settlement loss	—			13	—		—		2	—
Net periodic benefit cost (income)	$	(53	)	35	4		(36	)	21	(9	)