Business Optimization Business Optimization (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]
Business optimization charges as part of operating expenses	$ 24.7	$ 6.8
Incremental Implementation costs - business optimization	128.0
Restructuring and Related Cost, Expected in 2018	38.0
Other Nonoperating Income (Expense) [Member]
Restructuring Cost and Reserve [Line Items]
Business optimization charges as part of operating expenses	0.8
General and Administrative Expense [Member]
Restructuring Cost and Reserve [Line Items]
Business optimization charges as part of operating expenses	8.2
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Business optimization charges as part of operating expenses	$ 15.7