Pension Plans and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule Of Defined Benefit Plans Disclosures [Table Text Block]

For the three month periods ended June 30, 2016 and 2015, 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 June 30,						Three months ended June 30,
	2016			2015			2016			2015
Service cost - benefits earned during the year	$	5.1		$	5.7		$	0.7		$	0.7
Interest cost on benefits earned in prior years	31.3			30.2			3.9			4.5
Expected return on plan assets	(37.1		)	(42.0		)	—			—
Amortization of prior service cost (credit)	0.3			0.3			(0.8		)	1.2
Amortization of net actuarial loss	16.4			15.1			2.4			3.6
Total retirement benefit expense	$	16.0		$	9.3		$	6.2		$	10.0

For the six month periods ended June 30, 2016 and 2015, 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
	Six months ended June 30,						Six months ended June 30,
	2016			2015			2016			2015
Service cost - benefits earned during the year	$	10.3		$	11.4		$	1.3		$	1.4
Interest cost on benefits earned in prior years	62.7			60.5			8.0			9.0
Expected return on plan assets	(74.3		)	(84.1		)	—			—
Amortization of prior service cost (credit)	0.6			0.6			(0.2		)	2.4
Amortization of net actuarial loss	32.7			30.2			4.8			7.2
Total retirement benefit expense	$	32.0		$	18.6		$	13.9		$	20.0