Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 2017

Pension Plans, Defined Benefit [Member]

Schedule of Net Benefit Costs [Table Text Block]

Net pension and retiree health benefit (income) cost included the following components:

	Defined Benefit Pension Plans
	Three Months Ended March 31,
	2017			2016
Components of net periodic benefit cost:
Service cost	$	78.9		$	71.3
Interest cost	102.4			105.1
Expected return on plan assets	(194.0		)	(189.6		)
Amortization of prior service cost	1.4			6.0
Recognized actuarial loss	72.7			68.3
Net periodic benefit cost	$	61.4		$	61.1

Other Postretirement Benefit Plans, Defined Benefit [Member]

Schedule of Net Benefit Costs [Table Text Block]

	Retiree Health Benefit Plans
	Three Months Ended March 31,
	2017			2016
Components of net periodic benefit income:
Service cost	$	11.2		$	9.3
Interest cost	13.0			12.8
Expected return on plan assets	(40.3		)	(37.5		)
Amortization of prior service benefit	(22.5		)	(21.4		)
Recognized actuarial loss	4.1			5.2
Net periodic benefit income	$	(34.5	)	$	(31.6	)