Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2013

Defined Benefit Pension Plans

Components of Net Periodic Benefit Cost

Defined benefit plans - The components of net periodic defined benefit pension cost are presented in the table below.

	Three months ended September 30,								Nine months ended September 30,
	2012			2013				2012					2013
	(In millions)
Service cost	$	2.5		$	3.2		$			7.7		$		9.7
Interest cost		5.6			5.4					17.2				16.2
Expected return on plan assets		(4.5	)		(4.9	)				(13.7	)			(14.9	)
Amortization of prior service cost		.4			.4					1.2				1.2
Amortization of net transition obligations		.1			.1					.3				.3
Recognized actuarial losses		1.9			3.1					5.9				9.3
Total	$	6.0		$	7.3		$			18.6		$		21.8

OPEB

Components of Net Periodic Benefit Cost

Postretirement benefits - The components of net periodic postretirement benefits other than pension (OPEB) cost are presented in the table below.

	Three months ended September 30,								Nine months ended September 30,
	2012			2013				2012					2013
	(In millions)
Service cost	$	.1		$	.1		$			.2		$		.3
Interest cost		.1			.  2					.4				.4
Amortization of prior service credit		(.2	)		(.2	)				(.5	)			(.5	)
Recognized actuarial loss		.1			.1					.3				.3
Total	$	.1		$	.  2		$			.4		$		.5