Retirement Benefits (Tables)

9 Months Ended

Sep. 30, 2016

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 September 30,						Nine Months Ended September 30,
	2016			2015			2016			2015
Components of net periodic benefit cost:
Service cost	$	70.2		$	82.8		$	212.2		$	245.3
Interest cost	104.2			117.1			314.4			351.4
Expected return on plan assets	(187.6		)	(195.7		)	(566.7		)	(579.7		)
Amortization of prior service cost	2.9			2.5			8.6			7.6
Recognized actuarial loss	71.0			91.5			213.4			274.8
Net periodic benefit cost	$	60.7		$	98.2		$	181.9		$	299.4

Other Postretirement Benefit Plans, Defined Benefit [Member]

Schedule of Net Benefit Costs [Table Text Block]

	Retiree Health Benefit Plans
	Three Months Ended September 30,						Nine Months Ended September 30,
	2016			2015			2016			2015
Components of net periodic benefit income:
Service cost	$	9.7		$	10.5		$	29.3		$	31.5
Interest cost	13.0			15.3			39.0			46.0
Expected return on plan assets	(37.6		)	(37.1		)	(112.7		)	(111.3		)
Amortization of prior service benefit	(21.5		)	(21.6		)	(64.3		)	(64.8		)
Recognized actuarial loss	5.2			9.4			15.5			28.3
Net periodic benefit income	$	(31.2	)	$	(23.5	)	$	(93.2	)	$	(70.3	)