Commitments And Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Agreement	Dec. 31, 2011	Dec. 31, 2010	May 31, 2012	Mar. 09, 2010	Jul. 01, 2004
Contingencies And Commitments [Line Items]
Rent expense, net of sublease income	$ 145	$ 140	$ 143
Sublease rental income	5	5	4
Total outstanding letters of credit	504	410
Outstanding letters of credit	1	3
Number of existing real estate lease agreements	2
Purchase price of property on or before expiration date	28
Residual guarantee amount	23
Maximum amount of supplemental rent payment	5
Aggregate residual guarantee amount	23
Term for operating lease agreements (in years)	15 years
Fair market value of simulator systems, Minimum	7
Fair market value of simulator systems, Maximum	21
Additional rent to be paid for simulator systems after expiration date	3
Kalitta Air damages, minimum	235
Pre-judgment interest in Kalitta Air damages, minimum	240
Total damages sought						315
Punitive damages sought						150
Compensatory damages				$ 48.0	$ 6.7