Employee Benefit Plans

9 Months Ended

Sep. 30, 2017

Compensation And Retirement Disclosure [Abstract]

Employee Benefit Plans

Note 11—Employee benefit plans:

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

	Three months ended September  30,						Nine months ended September  30,
	2016			2017			2016			2017
	(In millions)
Service cost	$	2.5		$	3.0		$	7.5		$	8.5
Interest cost		4.5			4.1			13.4			11.8
Expected return on plan assets		(4.6	)		(3.3	)		(13.8	)		(9.7	)
Amortization of unrecognized prior service cost		.1			—			.2			.2
Recognized actuarial losses		3.3			3.9			10.2			11.2
Total	$	5.8		$	7.7		$	17.5		$	22.0

Other postretirement benefits – The components of our net periodic other postretirement benefit cost are presented in the table below.

	Three months ended September  30,						Nine months ended September  30,
	2016			2017			2016			2017
	(In millions)
Service cost	$	.1		$	—		$	.1		$	.1
Interest cost		.2			.1			.4			.3
Amortization of prior service credit		(.5	)		(.3	)		(1.4	)		(.8	)
Recognized actuarial gains		(.1	)		(.1	)		(.1	)		(.2	)
Total	$	(.3	)	$	(.3	)	$	(1.0	)	$	(.6	)

Contributions – We expect to contribute the equivalent of $16.0 million and $1.1 million, respectively, to all of our defined benefit pension plans and other postretirement benefit plans during 2017.