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Share-Based Compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based compensation expense $ 25.0 $ 16.0 $ 81.0 $ 147.0 $ 69.0
Tax benefit     31.0 31.0 $ 14.0
Share-based compensation liability accrued     15.0 $ 7.0  
Unrecognized compensation costs related to unvested awards $ 171.0   $ 83.0    
Unrecognized compensation costs related to unvested awards, weighted-average period 2 years 5 months   1 year 8 months 12 days    
Shares of common stock reserved for future issuance 29,922,923   21,823,633    
2015 and 2016 performance shares conversion percentage to restricted stock units 100.00%   100.00%    
Incremental expense related to the modification of grants $ 0.0   $ 0.3    
Incremental expense related to modification of grants recognized over the remaining terms of the awards     $ 5.6    
Conversion from Performance Shares to Restricted Stock Units upon completion of the spin-offs 671,604        
Deferred Share Units [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
DSU shares issued     11,393 6,179  
Weighted average grant date fair value, granted     $ 66.12 $ 84.96  
Employee stock option [member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted average remaining contractual term     8 years 2 months 12 days    
Vesting period 3 years        
Options, expiration period 10 years        
Options, grants in period, grant date fair value $ 13.86   $ 16.41 25.17 $ 22.74
Restricted stock units (RSUs) [member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted average grant date fair value, granted $ 58.02   59.73 82.38 64.59
Conversion from Performance Shares to Restricted Stock Units upon completion of the spin-offs [1] 671,604        
Restricted stock units (RSUs) [member] | Minimum [member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 2 years        
Restricted stock units (RSUs) [member] | Maximum [member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 3 years        
Performance shares [member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Anticipated achievement percentage 100.00%        
Free cash flow CAGR [member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted average grant date fair value, granted $ 58.02        
Vesting rights, percentage 50.00%        
EBITDA CAGR [member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted average grant date fair value, granted $ 58.02   $ 58.83 $ 82.38 $ 64.59
Conversion from Performance Shares to Restricted Stock Units upon completion of the spin-offs 335,802        
Vesting rights, percentage 50.00%        
[1] Represents all performance shares outstanding as of December 31, 2016.