v3.10.0.1
Share-based Compensation - Additional Information (Detail)
12 Months Ended 36 Months Ended
Jul. 26, 2018
$ / shares
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2017
€ / shares
Dec. 31, 2016
€ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Tax (expense) benefits recognized for stock-based compensation   $ 27,000,000 $ 51,000,000 $ 58,000,000      
Excess tax benefit related to share-based compensation   4,000,000 27,000,000        
Amount received on stock options exercised   $ 39,000,000 233,000,000 115,000,000      
Long Term Incentive Plans [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Shares authorized and available for awards | shares   2,500,000     2,500,000    
Charges for plan   $ 307,000,000 $ 272,000,000 $ 331,000,000      
Risk-free interest rate, minimum   0.80% 0.80% 0.80%      
Risk-free interest rate, maximum   2.10% 2.80% 2.80%      
Expected dividend payments   $ 0          
Stock options, Granted | shares   0 0   0    
Weighted average grant date fair value of stock options | $ / shares       $ 34.59      
Intrinsic value of exercised options   $ 59,000,000 $ 311,000,000 $ 145,000,000      
Amount received on stock options exercised   30,000,000 137,000,000 88,000,000      
Tax benefit realized from exercise of stock options   34,000,000 83,000,000 $ 79,000,000      
Unrecognized compensation cost   $ 7,000,000 $ 25,000,000   $ 7,000,000    
Weighted-average period for recognition of compensation cost   9 months 18 days 1 year 2 months 12 days        
Long Term Incentive Plans [Member] | Maximum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Expected life   6 years 3 months          
Volatility rate   50.00%          
Long Term Incentive Plans [Member] | Minimum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Expected life   5 years 9 months 3 days          
Volatility rate   40.00%          
Long Term Incentive Plans [Member] | Performance Share Units [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Weighted average grant date fair value of units granted | $ / shares $ 121.37            
Compensation cost recognized period 3 years            
Weighted-average period for recognition of compensation cost   2 years 7 months 6 days 1 year 3 months 18 days 1 year 9 months 18 days      
Fair value of vested shares   $ 6,000,000 $ 39,000,000 $ 147,000,000      
Unrecognized compensation cost   $ 143,000,000 $ 4,000,000 $ 12,000,000 143,000,000    
Long Term Incentive Plans [Member] | Performance Share Units [Member] | Financial Performance Conditions [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Weighted average grant date fair value of units granted | $ / shares   $ 0.00 $ 0.00 $ 82.53      
Shares, Granted | shares   0 0        
Long Term Incentive Plans [Member] | Performance Share Units [Member] | Market Performance Conditions [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Weighted average grant date fair value of units granted | $ / shares   $ 121.18          
Shares, Granted | shares   1,484,882          
Long Term Incentive Plans [Member] | Performance Share Units [Member] | Maximum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period   3 years          
Granted common shares per target units | shares 2            
Long Term Incentive Plans [Member] | Performance Share Units [Member] | Minimum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period   1 year          
Granted common shares per target units | shares 0            
Long Term Incentive Plans [Member] | Restricted Share Units [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period   3 years          
Weighted average grant date fair value of units granted | $ / shares   $ 84.77 $ 115.05 $ 98.16      
Weighted-average period for recognition of compensation cost   1 year 6 months 1 year 7 months 6 days 1 year 7 months 6 days      
Shares, Granted | shares   3,552,823          
Fair value of vested shares   $ 263,000,000 $ 328,000,000 $ 334,000,000      
Unrecognized compensation cost   $ 484,000,000 483,000,000 422,000,000 $ 484,000,000    
Long Term Incentive Plans [Member] | Special Termination Benefits [Member] | Maximum [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period   1 year          
Management Equity Stock Option Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Charges for plan   $ 0 0 0      
Stock options, Granted | shares   0          
Intrinsic value of exercised options   $ 16,000,000 206,000,000 13,000,000      
Amount received on stock options exercised   $ 9,000,000 $ 60,000,000 $ 7,000,000      
Number of vested stock options | shares   0 231,924 2,534,272 0    
Weighted average exercise price of vested options | € / shares           € 35.72 € 23.67