Retirement Benefits and Trusteed Assets

6 Months Ended

Jun. 30, 2012

Defined Benefit Plan, Assets for Plan Benefits [Abstract]

Pension and Other Postretirement Benefits Disclosure [Text Block]

RETIREMENT BENEFITS AND TRUSTEED ASSETS

The following details the components of net periodic benefit costs for pension benefits and other postretirement benefits (in millions):

	Pension Benefits						Other Postretirement Benefits
	2012			2011			2012			2011
Three Months Ended June 30
Service cost	$	17		$	15		$	14		$	13
Interest cost	39			38			23			24
Expected return on plan assets	(42		)	(42		)	(16		)	(15		)
Amortization of:
Net actuarial loss	30			24			14			10
Prior service cost (credit)	—			1			(4		)	(4		)
Settlements	—			2			—			—
Net periodic benefit cost	$	44		$	38		$	31		$	28

	Pension Benefits						Other Postretirement Benefits
	2012			2011			2012			2011
Six Months Ended June 30
Service cost	$	33		$	30		$	27		$	26
Interest cost	78			77			46			47
Expected return on plan assets	(83		)	(84		)	(31		)	(31		)
Amortization of:
Net actuarial loss	60			47			28			21
Prior service cost (credit)	—			2			(8		)	(8		)
Net transition liability	—			—			1			1
Settlements	2			2			—			—
Net periodic benefit cost	$	90		$	74		$	63		$	56

Pension and Other Postretirement Contributions

The Company contributed $80 million of DTE Energy common stock to its pension plans in the second quarter of 2012,

consisting of approximately 1.3 million shares valued at an average price of $59.94 per share.

At the discretion of management, and depending upon financial market conditions, the Company may make up to an additional $120 million contribution to its pension plans in 2012.

In January 2012, the Company contributed $95 million to its other postretirement benefit plans. At the discretion of

management, the Company may make up to an additional $120 million contribution to its postretirement benefit plans in 2012.