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Stock and Stock-Based Incentive Plans Stock And Stock-Based Incentive Plans (Expected Cash Settlement Range Upon Restricted Stock Unit Vesting) (Details) $ in Thousands	May 31, 2018 USD ($)
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fiscal 2020	$ 19,649
Fiscal 2021	22,359
Fiscal 2022	24,369
Total expected cash settlements	66,377
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fiscal 2020	52,399
Fiscal 2021	59,623
Fiscal 2022	64,985
Total expected cash settlements	$ 177,007

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Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected Cash Payouts Upon Vesting

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Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Expected Cash Payouts Upon Vesting In Next Fiscal Year

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