Accounts Receivable, Net (Tables)

12 Months Ended

Dec. 31, 2017

Receivables [Abstract]

Reserve for discounts and doubtful accounts

Reserve for discounts and doubtful accounts:

(In millions)	2017			2016			2015
As of January 1,	$	169.6		$	55.8		$	48.5
Provision charged to operations	1,408.1			838.1			424.2
Payments/credits	(1,306.2		)	(724.3		)	(416.9		)
As of December 31,	$	271.5		$	169.6		$	55.8