Pensions and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2013

Other Postretirement Benefit Plans, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Net Periodic Benefit Cost

	Other Postretirement Benefits
	Three Months Ended June 30						Six Months Ended June 30
	2013			2012			2013			2012
	(Millions)
Service cost	$	5		$	4		$	10		$	9
Interest cost	13			12			25			26
Amortization of prior service credit	(3		)	(3		)	(5		)	(4		)
Amortization of actuarial losses	7			6			14			15
Net periodic other postretirement benefit cost	$	22		$	19		$	44		$	46

Pension Plans, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Net Periodic Benefit Cost

net periodic benefit costs for the three and six months ended June 30, 2013 and 2012 were as follows:

	Pensions
	Three Months Ended June 30						Six Months Ended June 30
	2013			2012			2013			2012
	(Millions)
Service cost	$	14		$	13		$	29		$	28
Interest cost	54			56			106			112
Expected return on plan assets	(75		)	(67		)	(139		)	(134		)
Amortization of actuarial losses	32			34			60			66
Settlement losses	—			—			18			—
Net periodic pension cost	$	25		$	36		$	74		$	72

PPG