Commitments (Details 4) (USD $) In Millions, unless otherwise specified	6 Months Ended
Nov. 30, 2013
Other Commitment Disclosures [Abstract]
Deposit and Progress Payments	$ 237
Other Aircraft Commitments Disclosure [Line Items]
Boeing 777F Conditional Aircraft Commitments	9
Boeing 767F Conditional Aircraft Commitments	4
Subsequent Event [Line Items]
Subsequent Boeing 777 Options Deferred Two Years	11
Subsequent Aircraft Purchase Commitment Boeing 767 Delivery 2016 And 2017	2

The number of Boeing 767F aircraft committed to be purchased which are conditional on certain events.

No definition available.

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The number of Boeing 777F aircraft committed to be purchased which are conditional on certain events.

No definition available.

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Balance of deposits and progress payments on aircraft purchases and other planned aircraft-related transactions.

No definition available.

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Aircraft purchase commitments for Boeing 767 with delivery in 2016 and 2017 subsequent to the balance sheet date

No definition available.

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Number of Boeing 777 options deferred two years subsequent to the balance sheet date

No definition available.

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