Retirement Benefits (Tables)

6 Months Ended

Jun. 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 June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Components of net periodic benefit cost:
Service cost	$	70.6		$	85.5		$	142.0		$	162.5
Interest cost	105.1			117.2			210.2			234.3
Expected return on plan assets	(189.6		)	(192.2		)	(379.1		)	(384.0		)
Amortization of prior service (benefit) cost	(0.2		)	2.6			5.7			5.1
Recognized actuarial loss	74.0			90.9			142.4			183.3
Net periodic benefit cost	$	59.9		$	104.0		$	121.2		$	201.2

Other Postretirement Benefit Plans, Defined Benefit [Member]

Schedule of Net Benefit Costs [Table Text Block]

	Retiree Health Benefit Plans
	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Components of net periodic benefit income:
Service cost	$	10.3		$	11.2		$	19.6		$	21.0
Interest cost	13.2			15.3			26.0			30.7
Expected return on plan assets	(37.6		)	(37.1		)	(75.1		)	(74.2		)
Amortization of prior service benefit	(21.5		)	(21.6		)	(42.8		)	(43.2		)
Recognized actuarial loss	5.2			9.5			10.3			18.9
Net periodic benefit income	$	(30.4	)	$	(22.7	)	$	(62.0	)	$	(46.8	)