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Retirement Plans - Additional Information (Details) - U.S. Pension Plans [Member] - Voluntary Contribution [Member] - USD ($) $ in Millions		3 Months Ended
	Sep. 14, 2018	Aug. 31, 2018	Aug. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer		$ 250	$ 250
Subsequent Event [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan contributions by employer	$ 250

X

- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

+ References

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- Definition

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+ References

No definition available.

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