Commitments (Details 4) (USD $) In Millions, unless otherwise specified	3 Months Ended
Aug. 31, 2013
Other Commitment Disclosures [Abstract]
Deposit and Progress Payments	$ 416
Other Aircraft Commitments Disclosure [Line Items]
Boeing 777F Conditional Aircraft Commitments	9
Boeing 767F Conditional Aircraft Commitments	4
B757 Aircraft Options Exercised	16

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

No definition available.

Name:	fec_DepositAndProgressPayments
Namespace Prefix:	fec_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant