Restructuring Restructuring (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Oct. 21, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 93.4	$ 93.4	$ 0.0	$ 0.0
Previously accrued incentive compensation	15.9
Restructuring amounts paid	(72.0)
Restructuring reserve	37.3	37.3			$ 109.3
Workforce reduction
Restructuring Cost and Reserve [Line Items]
Restructuring charges	86.2
Previously accrued incentive compensation	15.9
Restructuring amounts paid	(68.4)
Restructuring reserve	33.7	33.7			102.1
Pipeline programs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	7.2
Previously accrued incentive compensation	0.0
Restructuring amounts paid	(3.6)
Restructuring reserve	$ 3.6	$ 3.6			$ 7.2