Net Earnings (Loss) Per Common Share - Revised Diluted Weighted Average Number of Common Shares Outstanding (Detail) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended						6 Months Ended		9 Months Ended	12 Months Ended	3 Months Ended						6 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014 Scenario, Previously Reported	Mar. 31, 2014 Scenario, Previously Reported	Dec. 31, 2013 Scenario, Previously Reported	Sep. 30, 2013 Scenario, Previously Reported	Jun. 30, 2013 Scenario, Previously Reported	Mar. 31, 2013 Scenario, Previously Reported	Jun. 30, 2014 Scenario, Previously Reported	Jun. 30, 2013 Scenario, Previously Reported	Jun. 30, 2013 Scenario, Previously Reported	Dec. 31, 2013 Scenario, Previously Reported	Jun. 30, 2014 Restatement Adjustment	Mar. 31, 2014 Restatement Adjustment	Dec. 31, 2013 Restatement Adjustment	Sep. 30, 2013 Restatement Adjustment	Jun. 30, 2013 Restatement Adjustment	Mar. 31, 2013 Restatement Adjustment	Jun. 30, 2014 Restatement Adjustment	Jun. 30, 2013 Restatement Adjustment	Jun. 30, 2013 Restatement Adjustment	Dec. 31, 2013 Restatement Adjustment
Disclosure - Net Earnings (Loss) Per Common Share - Revised Diluted Weighted Average Number of Common Shares Outstanding (Detail) [Line Items]
Diluted	213.5	215.3	215.3	214.9	214.7	214.5	213.9	213.7	213.6	212.7	214.6	213.2	213.4	213.5	216.4	216.0	215.4	215.3	215.0	214.3	216.2	214.7	214.9	215.1