Basis of Presentation and Significant Accounting Policies - Summary of Impact of Adoption of Topic 606 on Condensed Consolidated Statement of Operations and Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jan. 01, 2018	Dec. 31, 2017
Item Effected [Line Items]
Accounts receivable, net	$ 2,346.0			$ 2,674.0
Inventory, net	2,584.9			2,498.8
Prepaid expenses and other	427.3			415.5
Assets held for sale	2,654.1			4.0
Other accrued liabilities	1,617.3			1,705.4
Retained earnings	4,542.5			4,611.2
Net sales	3,017.4	$ 3,266.3
Cost of products sold	2,012.0	2,149.1
Selling, general and administrative expenses	880.4	931.5
Operating income	117.1	154.0
Income tax (benefit) expense	(51.3)	151.6
Net income	53.3	$ 638.5
Accounting Standards Update 2014-09 [Member]
Item Effected [Line Items]
Accounts receivable, net	2,190.3		$ 2,827.6
Inventory, net	2,586.4
Prepaid expenses and other	409.9		431.9
Assets held for sale	2,651.6
Other accrued liabilities	1,446.6		1,875.4
Retained earnings	4,539.1		$ 4,611.2
Net sales	3,063.6
Cost of products sold	2,060.3
Selling, general and administrative expenses	882.9
Operating income	112.5
Income tax (benefit) expense	(52.5)
Net income	49.9
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Item Effected [Line Items]
Accounts receivable, net	(155.7)			153.6
Inventory, net	1.5
Prepaid expenses and other	(17.4)			16.4
Assets held for sale	(2.5)
Other accrued liabilities	(170.7)			$ 170.0
Retained earnings	(3.4)
Net sales	46.2
Cost of products sold	48.3
Selling, general and administrative expenses	2.5
Operating income	(4.6)
Income tax (benefit) expense	(1.2)
Net income	(3.4)
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Item Effected [Line Items]
Accounts receivable, net	2,346.0
Inventory, net	2,584.9
Prepaid expenses and other	427.3
Assets held for sale	2,654.1
Other accrued liabilities	1,617.3
Retained earnings	4,542.5
Net sales	3,017.4
Cost of products sold	2,012.0
Selling, general and administrative expenses	880.4
Operating income	117.1
Income tax (benefit) expense	(51.3)
Net income	$ 53.3