Basis of Presentation - Schedule of Revision of Net Sales and Cost of Sales (Detail) - USD ($) $ in Millions	3 Months Ended							9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2017	Sep. 30, 2016
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Products net sales	$ 1,322.0	$ 1,237.4	$ 1,271.5	$ 1,452.9	$ 1,327.8	$ 1,215.1	$ 1,229.6	$ 3,830.9	$ 3,772.5
Total net sales	1,734.9	1,620.0	1,658.9	1,858.9	1,725.6	1,616.0	1,632.5	5,013.8	4,974.1
Products cost of sales	1,064.1	994.7	1,006.9	1,143.6	1,030.7	968.6	958.8	3,065.7	2,958.1
Total cost of sales	$ 1,410.5	1,316.9	1,331.1	1,495.2	1,361.4	1,299.6	1,300.0	$ 4,058.5	$ 3,961.0
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Products net sales		1,263.4	1,288.9	1,470.3	1,343.4	1,231.7	1,242.7
Total net sales		1,646.0	1,676.3	1,876.3	1,741.2	1,632.6	1,645.6
Products cost of sales		1,020.7	1,024.3	1,161.0	1,046.3	985.2	971.9
Total cost of sales		1,342.9	1,348.5	1,512.6	1,377.0	1,316.2	1,313.1
Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Products net sales		26.0	17.4	17.4	15.6	16.6	13.1
Total net sales		26.0	17.4	17.4	15.6	16.6	13.1
Products cost of sales		26.0	17.4	17.4	15.6	16.6	13.1
Total cost of sales		$ 26.0	$ 17.4	$ 17.4	$ 15.6	$ 16.6	$ 13.1