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General Information - Additional Information (Detail)
 3 Months Ended
Mar. 31, 2017
USD ($)
segment
$ / shares
shares
Mar. 31, 2016
USD ($)
$ / shares
Feb. 28, 2017
USD ($)
General Information Disclosures [Line Items]      
Number of business segments | segment 2    
Common stock shares issued (in shares) | shares 2,485,478    
Proceeds as a result of the exercise and settlement of employee equity-based awards $ 12,000,000    
Common stock cash dividend paid per share (in dollars per share) | $ / shares $ 0.14 $ 0.13  
Common stock cash dividend paid $ 39,000,000 $ 36,000,000  
Amount authorized to be repurchased     $ 500,000,000
Number of shares repurchased (in shares) | shares 532,500    
Value of shares repurchased $ 12,000,000    
Restricted Stock [Member]      
General Information Disclosures [Line Items]      
Payment of income tax withholdings related to settlement of share based awards $ 10,000,000