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Long-term incentive compensation - Additional Information (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
9 Months Ended
Nov. 04, 2019
Sep. 30, 2019
Sep. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Long-term incentive program (LTIP) expense   $ 82,469 $ 74,077
Stock-based compensation expense   47,811 59,605
Estimated tax benefits recorded for stock-based compensation   6,798 10,887
Unrecognized compensation cost related to outstanding LTIP awards   166,502  
Unrecognized compensation cost related to nonvested stock-based compensation arrangements under equity compensation and stock purchase plans   $ 151,805  
Unrecognized compensation cost related to nonvested stock-based compensation arrangements under performance-based cash component of LTIP costs, weighted average remaining period (in years)   7 months 6 days  
Unrecognized compensation cost related to nonvested stock-based compensation arrangements under stock-based component of LTIP costs, weighted average remaining period (in years)   1 year 7 months 6 days  
Share-based Payment Arrangement, Expense, Tax Benefit   $ 2,791 7,919
Restricted and Performance Stock Units      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock-settled awards granted (in shares)   1,921  
Aggregate grant-date fair value   $ 96,472  
Weighted-average expected life (in years)   3 years 4 months 24 days  
Stock Appreciation Rights      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock-settled awards granted (in shares)   2,390  
Aggregate grant-date fair value   $ 33,545  
Weighted-average expected life (in years)   4 years  
General and Administrative Expense      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock-based compensation expense   $ 43,666 $ 60,461
Subsequent Event | Premium Priced Stock-Settled Stock Appreciation Rights      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock-settled awards granted (in shares) 2,500    
Premium Priced Award Base Price Per Share $ 67.80    
Premium To The Tender Offer Share Purchase Price 20.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 5 years    
Subsequent Event | Vesting period, tranche one | Premium Priced Stock-Settled Stock Appreciation Rights      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 50.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years    
Subsequent Event | Vesting period, tranche two | Premium Priced Stock-Settled Stock Appreciation Rights      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 50.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years