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Financing - Schedule of Debt (Detail) - USD ($)
$ in Thousands
May 09, 2020
Mar. 30, 2020
Aug. 31, 2019
Debt Instrument [Line Items]      
Commercial paper     $ 1,030,000
Total debt before discounts and debt issuance costs $ 5,450,000   5,230,000
Less: Discounts and debt issuance costs 31,728   23,656
Long-term debt 5,418,272   5,206,344
4.000% Senior Notes due November 2020, effective interest rate of 4.43%      
Debt Instrument [Line Items]      
Senior notes 500,000   500,000
2.500% Senior Notes due April 2021, effective interest rate of 2.62%      
Debt Instrument [Line Items]      
Senior notes 250,000   250,000
3.700% Senior Notes due April 2022, effective interest rate of 3.85%      
Debt Instrument [Line Items]      
Senior notes 500,000   500,000
2.875% Senior Notes due January 2023, effective interest rate of 3.21%      
Debt Instrument [Line Items]      
Senior notes 300,000   300,000
3.125% Senior Notes due July 2023, effective interest rate of 3.26%      
Debt Instrument [Line Items]      
Senior notes 500,000   500,000
3.125% Senior Notes due April 2024, effective interest rate 3.32%      
Debt Instrument [Line Items]      
Senior notes 300,000   300,000
3.250% Senior Notes due April 2025, effective interest rate 3.36%      
Debt Instrument [Line Items]      
Senior notes 400,000   400,000
3.625% Senior Notes due April 2025, effective interest rate 3.78%      
Debt Instrument [Line Items]      
Senior notes 500,000 $ 500,000  
3.125% Senior Notes due April 2026, effective interest rate of 3.28%      
Debt Instrument [Line Items]      
Senior notes 400,000   400,000
3.750% Senior Notes due June 2027, effective interest rate of 3.83%      
Debt Instrument [Line Items]      
Senior notes 600,000   600,000
3.750% Senior Notes due April 2029, effective interest rate of 3.86%      
Debt Instrument [Line Items]      
Senior notes 450,000   $ 450,000
4.000% Senior Notes due April 2030, effective interest rate 4.09%      
Debt Instrument [Line Items]      
Senior notes $ 750,000 $ 750,000