Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2011

Employee Benefit Plans

Net Periodic Benefit Cost

	Pension Benefits						Other Postretirement Benefits
	2011			2010			2011			2010
(millions)
Three Months Ended June 30,
Service cost	$	27		$	25		$	12		$	14
Interest cost		65			68			24			25
Expected return on plan assets		(111	)		(106	)		(19	)		(18	)
Amortization of prior service cost (credit)		1			1			(4	)		(1	)
Amortization of net loss		24			15			3			3
Settlements and curtailments		—			—			(1	)		(1	)
Special termination benefits		—			1			—			—
Net periodic benefit cost	$	6		$	4		$	15		$	22
Six Months Ended June 30,
Service cost	$	54		$	52		$	24		$	28
Interest cost		129			134			47			50
Expected return on plan assets		(221	)		(205	)		(39	)		(35	)
Amortization of prior service cost (credit)		2			2			(7	)		(3	)
Amortization of net loss		48			30			6			6
Settlements and curtailments(1)		—			84			(1	)		37
Special termination benefits(2)		—			10			—			1
Net periodic benefit cost	$	12		$	107		$	30		$	84

(1) 2010 amounts relate to the sale of Peoples and a workforce reduction program.

(2) Represents a one-time special termination benefit for certain employees in connection with a workforce reduction program.