Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 2017

Compensation and Retirement Disclosure [Abstract]

Schedule Of Defined Benefit Plans Disclosures [Table Text Block]

For the three month periods ended March 31, 2017 and 2016, the components of pension and other postretirement benefit expense for the Company’s defined benefit plans included the following (in millions):



	Pension Benefits						Other Postretirement Benefits
	Three months ended March 31,						Three months ended March 31,
	2017			2016			2017			2016
Service cost - benefits earned during the year	$	3.5		$	5.2		$	0.6		$	0.6
Interest cost on benefits earned in prior years	29.2			31.4			3.7			4.1
Expected return on plan assets	(36.7		)	(37.2		)	—			—
Amortization of prior service cost (credit)	0.3			0.3			(0.7		)	0.6
Amortization of net actuarial loss	15.6			16.3			2.2			2.4
Total retirement benefit expense	$	11.9		$	16.0		$	5.8		$	7.7