Pension and Other Benefits (Tables)

6 Months Ended

Jun. 30, 2018

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Schedule of net pension and other benefit costs

The following table sets forth the components of net pension and other benefit costs for the three and six months ended June 30, 2018 and 2017 (in millions):

	Pension Benefits						Other Benefits
	2018			2017			2018			2017
Three Months Ended June 30,
Service cost	$	1.1		$	1.5		$	0.1		$	—
Interest cost	8.6			9.3			0.3			0.3
Expected return on plan assets	(8.5		)	(8.5		)	—			—
Amortization of prior service cost	—			—			(0.3		)	(0.2		)
Amortization of actuarial losses	2.7			2.7			0.1			—
Settlement and curtailment losses	—			0.5			—			—
NET PERIODIC BENEFIT COST	$	3.9		$	5.5		$	0.2		$	0.1
Six Months Ended June 30,
Service cost	$	2.2		$	3.0		$	0.1		$	—
Interest cost	17.2			18.5			0.5			0.4
Expected return on plan assets	(17.0		)	(17.0		)	—			—
Amortization of prior service cost	—			—			(0.5		)	(0.4		)
Amortization of actuarial losses	5.5			5.5			0.1			—
Settlement and curtailment losses	—			0.5			—			—
NET PERIODIC BENEFIT COST	$	7.9		$	10.5		$	0.2		$	—