Business Restructuring and Cost Reduction Actions (Carrying Amount of Accrual) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015	Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]
Business restructuring and cost reduction actions	$ 0.0	$ 32.4
Business Realignment and Reorganization [Member]
Restructuring Cost and Reserve [Line Items]
Business restructuring and cost reduction actions		$ 32.4	$ 207.7
Amount reflected in pension liability			(14.0)
Noncash expenses			(47.4)
Cash expenditures	(13.1)		(114.7)
Currency translation adjustment	(0.5)		(0.4)
Accrued Balance	28.1		41.7	$ 10.5
Business Realignment and Reorganization [Member] | Severance And Other Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Business restructuring and cost reduction actions			151.9
Amount reflected in pension liability			(14.0)
Noncash expenses			0.0
Cash expenditures	(11.3)		(113.5)
Currency translation adjustment	(0.5)		(0.4)
Accrued Balance	22.7		34.5	10.5
Business Realignment and Reorganization [Member] | Asset Actions [Member]
Restructuring Cost and Reserve [Line Items]
Business restructuring and cost reduction actions			55.8
Amount reflected in pension liability			0.0
Noncash expenses			(47.4)
Cash expenditures	(1.8)		(1.2)
Currency translation adjustment	0.0		0.0
Accrued Balance	$ 5.4		$ 7.2	$ 0.0