XML 127 R114.htm IDEA: XBRL DOCUMENT v3.5.0.2
Share-Based Compensation - Weighted-Average Assumptions Used for Grants of Stock Options and SARs (Detail) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Range of interest rates, minimum 0.02% 0.02% 0.02%
Range of interest rates, maximum 2.14% 2.61% 1.78%
Stock Option and Stock Appreciation Rights (SARs)      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected dividend yield 0.00% 0.00% 0.00%
Forfeiture rate 10.24% 10.32% 10.31%
Volatility 33.98% 34.92% 32.00%
Risk free interest rate 1.53% 1.73% 0.82%
Expected weighted-average life 5 years 3 months 25 days 5 years 4 months 10 days 5 years 5 months 1 day
Fair value of SARs granted (in millions) $ 12 $ 5 $ 5
Weighted-average grant date fair value of SARs granted (per underlying share) (in USD per share) $ 35.00 $ 24.98 $ 13.86