Summarized Quarterly Financial Information (Unaudited, in millions, except share data) (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 1,973.7	$ 1,975.5	$ 1,973.6	$ 1,827.7	$ 2,012.5	$ 1,912.0	$ 1,937.4	$ 1,828.9	$ 7,750.5	$ 7,690.8	[1]	$ 7,559.2	[1]
Gross profit	672.3	696.1	679.6	639.6	668.6	650.4	656.6	614.3	2,687.6	2,589.9	[1]	2,520.5	[1]
Net earnings from continuing operations	66.3	60.8	60.1	70.9	5.0	35.5	52.7	2.1	258.1	95.3	[1],[2]	(1,619.0)	[1],[2]
Net earnings from discontinued operations					24.0	2.5	2.0	2.0		7.6	[1]	28.7	[1]
Net earnings available to common stockholders	$ 66.3	$ 60.8	$ 60.1	$ 70.9	$ 29.0	$ 38.0	$ 54.7	$ 4.1	$ 258.1	$ 125.8	[1]	$ (1,411.4)	[1]
Basic net earnings per common share
Continuing operations	$ 0.31	$ 0.29	$ 0.28	$ 0.34	$ 0.03	$ 0.18	$ 0.27	$ 0.01	$ 1.22	$ 0.49	[1]	$ (8.40)	[1]
Discontinued operations					$ 0.12	$ 0.01	$ 0.01	$ 0.01		$ 0.16	[1]	$ 1.08	[1]
Net earnings (loss) per common share - basic	$ 0.31	$ 0.29	$ 0.28	$ 0.34	$ 0.15	$ 0.19	$ 0.28	$ 0.02	$ 1.22	$ 0.65	[1]	$ (7.32)	[1]
Diluted net earnings per common share
Continuing operations	$ 0.31	$ 0.28	$ 0.28	$ 0.33	$ 0.02	$ 0.17	$ 0.24	$ 0.01	$ 1.20	$ 0.44	[1]	$ (8.40)	[1]
Discontinued operations					$ 0.11	$ 0.01	$ 0.01	$ 0.01		$ 0.14	[1]	$ 1.08	[1]
Net earnings (loss) per common share - diluted	$ 0.31	$ 0.28	$ 0.28	$ 0.33	$ 0.13	$ 0.18	$ 0.25	$ 0.02	$ 1.20	$ 0.58	[1]	$ (7.32)	[1]

[1] Certain amounts have been revised to reflect the retrospective application of the Company’s change in inventory costing method for certain U.S. inventories to the FIFO method from the LIFO method. Refer to Note 2, “Summary of Significant Accounting Policies - Inventories,” of the notes to consolidated financial statements for further details surrounding this accounting policy change.

[2] Certain amounts have been revised to reflect the retrospective application of the Company’s change in inventory costing method for certain U.S. inventories to the FIFO method from the LIFO method. Refer to Note 2, “Summary of Significant Accounting Policies - Inventories,” of the notes to consolidated financial statements for further details surrounding this accounting policy change.