Analyzing and Interpreting Pension Disclosures E.I. Du Pont De Nemours and Co.'s 10-K report has the following disclosures related to its retirement plans ($ millions).

Obligations and Funded Status	Pension Benefits
December 31 ($ millions)	2012	2011
Change in benefit obligation
Benefit obligation at beginning of year	$ 27,083	$ 23,924
Service cost	277	249
Interest cost	1,165	1,253
Plan participants' contributions	24	21
Acturarial loss	2,245	3,062
Benefits paid	(1,593)	(1,610)
Amendments	(22)	2
Net effects of acquisitions/divestitures	--	182
Benefit obligation at end of year	$ 29,179	$ 27,083
Change in plan assets
Fair value of plan assets at beginning of year	$ 17,794	$ 18,403
Actual gain on plan assets	2,326	471
Employer contributions	848	341
Plan participants' contributions	24	21
Benefits paid	(1,593)	(1,610)
Net effects of acquisitions/divestitures	--	168
Fair value of plan assets at end of year	$ 19,399	$ 17,794
Funded status
U.S. plans with plan assets	$ (6,625)	$ 892
Non-U.S. plans with plan assets	(1,443)	(317)
All other plans	(1,712)	(1,515)
Total	$ (9,780)	$ (9,289)
Amount recognized in the Consolidated Balance
Sheets consist of:
Other assets	$5	(4)
Other accrued liabilities	(110)	(107)
Other liabilities	(9,303)	(9,186)
Liabilities related to assets held for sale	(372)	--
Net amount recognized	(9,780)	(9,289)

	Pension Benefits (in millions)
Components of net periodic benefit cost (credit) and amounts recognized in other comprehensive income	2012	2011	2010
Net periodic benefit
Service cost	$ 277	$ 249	$ 207
Interest cost	1,165	1,253	1,262
Expected return on plan assets	(1,517)	(1,475)	(1,435)
Amortization of loss	887	613	507
Amortization of prior service cost	13	16	16
Curtailment/settlement loss	7	--	--
Net periodic benefit cost	$ 832	$ 656	$ 557
Changes in plan assets and benefit obligations recognized in other comprehensive income
Net loss	1,433	$4,069	$635
Amortization of loss	(887)	(613)	(507)
Prior service (benefit) cost	(22)	2	--
Amortization of prior service cost	(13)	(16)	(16)
Curtailment/settlement loss	(7)	--	--
Total loss recognize in other comprehensive income	504	3,442	112
Noncontrolling interest	(1)	(11)	(1)
Accumulated other comprehensive income assumed from purchase of noncontrolling interest	25	--	--
Total loss recognized in other comprehensive income, attributable to DuPont	$ 528	$3,431	$111
Total recognized in net periodic benefit cost and other comprehensive income	$(1,360)	$4,087	$668

Weighted-avg. assumptions used for net periodic benefit cost for years ended Dec. 31	2012	2011	2010
Dicsount Rate	4.32%	5.32%	5.80%
Expected return on plan assets	8.61%	8.73%	8.64%
Rate of compensation increase	4.18%	4.24%	4.24%

The following benefit payments, which reflect future service, as appropriate, are expected to be paid:

($ millions)	Pension Benefits
2013	$1,629
2014	1,604
2015	1,629
2016	1,637
2017	1,667
Years 2018-2022	8,678

HINT: Do not use negative signs with your answers.

(a) How much pension expense (revenue) does DuPont report in its 2012 income statement?

(b) DuPont reports a $1,517 million expected return on pension plan assets as an offset to 2012 pension expense. Approximately, how is this amount computed (estimate from the numbers reported)?

(c)DuPont's pension plan is overfunded or underfunded?by how much ?