Net Earnings (Loss) per Common Share - Additional Information (Detail) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Diluted	213.9	214.2	[1]	192.8	[1]
Performance Stock Units [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Diluted	1.0	1.0		0

[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.