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v3.20.1

Financing - Schedule of Debt (Parenthetical) (Detail) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 15, 2020 | Aug. 31, 2019
Commercial paper, weighted average interest rate of 1.72% and 2.28% at February 15, 2020 and August 31, 2019, respectively [Member] |  |
Debt Instrument [Line Items] |  |
Weighted average interest rate of commercial paper | 1.72% | 2.28%
4.000% Senior Notes due November 2020, effective interest rate of 4.43% [Member] |  |
Debt Instrument [Line Items] |  |
Stated interest rate percentage | 4.00% | 4.00%
Effective interest rate | 4.43% | 4.43%
Debt instrument maturity, month and year | 2020-11 | 2020-11
2.500% Senior Notes due April 2021, effective interest rate of 2.62% [Member] |  |
Debt Instrument [Line Items] |  |
Stated interest rate percentage | 2.50% | 2.50%
Effective interest rate | 2.62% | 2.62%
Debt instrument maturity, month and year | 2021-04 | 2021-04
3.700% Senior Notes due April 2022, effective interest rate of 3.85% [Member] |  |
Debt Instrument [Line Items] |  |
Stated interest rate percentage | 3.70% | 3.70%
Effective interest rate | 3.85% | 3.85%
Debt instrument maturity, month and year | 2022-04 | 2022-04
2.875% Senior Notes due January 2023, effective interest rate of 3.21% [Member] |  |
Debt Instrument [Line Items] |  |
Stated interest rate percentage | 2.875% | 2.875%
Effective interest rate | 3.21% | 3.21%
Debt instrument maturity, month and year | 2023-01 | 2023-01
3.125% Senior Notes due July 2023, effective interest rate of 3.26% [Member] |  |
Debt Instrument [Line Items] |  |
Stated interest rate percentage | 3.125% | 3.125%
Effective interest rate | 3.26% | 3.26%
Debt instrument maturity, month and year | 2023-07 | 2023-07
3.125% Senior Notes due April 2024, effective interest rate 3.32% [Member] |  |
Debt Instrument [Line Items] |  |
Stated interest rate percentage | 3.125% | 3.125%
Effective interest rate | 3.32% | 3.32%
Debt instrument maturity, month and year | 2024-04 | 2024-04
3.250% Senior Notes due April 2025, effective interest rate 3.36% [Member] |  |
Debt Instrument [Line Items] |  |
Stated interest rate percentage | 3.25% | 3.25%
Effective interest rate | 3.36% | 3.36%
Debt instrument maturity, month and year | 2025-04 | 2025-04
3.125% Senior Notes due April 2026, effective interest rate of 3.28% [Member] |  |
Debt Instrument [Line Items] |  |
Stated interest rate percentage | 3.125% | 3.125%
Effective interest rate | 3.28% | 3.28%
Debt instrument maturity, month and year | 2026-04 | 2026-04
3.750% Senior Notes due June 2027, effective interest rate of 3.83% [Member] |  |
Debt Instrument [Line Items] |  |
Stated interest rate percentage | 3.75% | 3.75%
Effective interest rate | 3.83% | 3.83%
Debt instrument maturity, month and year | 2027-06 | 2027-06
3.750% Senior Notes due April 2029, effective interest rate of 3.86% [Member] |  |
Debt Instrument [Line Items] |  |
Stated interest rate percentage | 3.75% | 3.75%
Effective interest rate | 3.86% | 3.86%
Debt instrument maturity, month and year | 2029-04 | 2029-04

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