Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2016

Share-based Compensation [Abstract]

Net Periodic Pension and Postretirement Benefits Costs

Table 74: Net Periodic Pension and Postretirement Benefit Costs
	Qualified Pension Plan				Nonqualified Retirement Plans					Postretirement Benefits
Three months ended June 30
In millions	2016		2015			2016		2015			2016		2015
Net periodic costconsists of:
Service cost	$	25	$	26		$	1	$	1		$	2	$	2
Interest cost		47		45			3		3			3		3
Expected return on plan assets		(71)		(74)								(1)
Amortization of prior service credit		(1)		(2)								(1)
Amortization of actuarial losses		11		8			1		1
Net periodic cost/(benefit)	$	11	$	3		$	5	$	5		$	3	$	5
	Qualified Pension Plan				Nonqualified Retirement Plans					Postretirement Benefits
Six months ended June 30
In millions	2016		2015			2016		2015			2016		2015
Net periodic costconsists of:
Service cost	$	51	$	53		$	1	$	1		$	3	$	3
Interest cost		93		89			6		6			7		7
Expected return on plan assets		(141)		(148)								(2)
Amortization of prior service credit		(3)		(4)								(1)
Amortization of actuarial losses		22		15			2		3
Net periodic cost/(benefit)	$	22	$	5		$	9	$	10		$	7	$	10