Borrowings - Credit Agreements (Details) - USD ($) |
Feb. 28, 2021 |
Mar. 31, 2020 |
Feb. 29, 2020 |
Jun. 30, 2019 |
Sep. 30, 2018 |
Aug. 31, 2018 |
|---|---|---|---|---|---|---|
| Schedule of Debt [Line Items] | ||||||
| Short-term borrowings | $ 0 | $ 238,900,000 | ||||
| 2019 Five-Year Term Facility | Unsecured debt | ||||||
| Schedule of Debt [Line Items] | ||||||
| Debt instrument, face amount | 491,300,000 | $ 491,300,000 | ||||
| Unsecured debt | $ 454,400,000 | |||||
| Interest rate | 1.00% | |||||
| LIBOR margin | 0.88% | |||||
| Revolving credit facility | ||||||
| Schedule of Debt [Line Items] | ||||||
| Debt instrument, face amount | $ 2,000,000,000.0 | $ 2,000,000,000.0 | $ 2,000,000,000.0 | $ 1,500,000,000 | ||
| Short-term borrowings | $ 0 | |||||
| Interest rate | 0.00% | |||||
| LIBOR margin | 0.00% | |||||
| Remaining borrowing capacity | $ 1,988,300,000 | |||||
| Letters of credit | ||||||
| Schedule of Debt [Line Items] | ||||||
| Debt instrument, face amount | 200,000,000.0 | |||||
| Outstanding letters of credit | $ 11,700,000 |
| X | ||||||||||
- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Weighted average interest rate of debt outstanding. No definition available.
|
| X | ||||||||||
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. No definition available.
|
| X | ||||||||||
- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|