XML 87 R68.htm IDEA: XBRL DOCUMENT v3.8.0.1
Earnings Per Share - Additional Information (Detail) - $ / shares
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Nov. 01, 2016
Oct. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Common stock shares included in the calculation of EPS 184,000,000 183,000,000 182,471,195    
Common stock shares issued 185,200,713 182,930,995   182,471,195 0
Common stock shares outstanding 185,200,713 182,930,995     0
Stock Awards and Stock Options [Member]          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Number of anti-dilutive securities   1,000,000      
Potential common shares that would have been included in diluted average shares outstanding   1,000,000      
CL Equity Unit Purchase Agreements [Member]          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Number of anti-dilutive securities   1,000,000      
Stock Options [Member]          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Weighted average exercise price of options   $ 33.05