Accounts Receivable, Net (Summary of Reserve for Discounts and Allowances) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Provision for discounts and doubtful accounts
As of January 1,	$ 169.6	$ 55.8
Provision charged to operations	295.2	149.4
Payments/credits	(304.5)	(123.3)
As of March 31,	$ 160.3	$ 81.9