Employee Pension Plans (Tables)

6 Months Ended

Jun. 30, 2011

PLUM CREEK TIMBER CO INC [Member]

Schedule of Net Benefit Costs [Table Text Block]

The components of pension cost were as follows for the quarterly and six-month periods ended June 30 (in millions):

	Quarter Ended June 30,
	2011			2010
Service Cost	$	2		$	2
Interest Cost	2			2
Expected Return on Plan Assets	(2		)	(2		)
Total Pension Cost	$	2		$	2
	Six Months Ended June 30,
	2011			2010
Service Cost	$	4		$	4
Interest Cost	4			4
Expected Return on Plan Assets	(4		)	(4		)
Total Pension Cost	$	4		$	4

PLUM CREEK TIMBERLANDS L P [Member]

Schedule of Net Benefit Costs [Table Text Block]

The components of pension cost were as follows for the quarterly and six-month periods ended June 30 (in millions):

	Quarter Ended June 30,
	2011			2010
Service Cost	$	2		$	2
Interest Cost	2			2
Expected Return on Plan Assets	(2		)	(2		)
Total Pension Cost	$	2		$	2
	Six Months Ended June 30,
	2011			2010
Service Cost	$	4		$	4
Interest Cost	4			4
Expected Return on Plan Assets	(4		)	(4		)
Total Pension Cost	$	4		$	4