Commitments, Contingencies And Guarantees (Aircraft Acquisition Commitments) (Details)	Mar. 31, 2013
Property Subject to or Available for Operating Lease [Line Items]
Aircraft Purchase Committment Future Minimum Quantity Required Current	27
Aircraft Lease Commitment Future Minimum Quantity Required Current	20
Aircraft Purchase Committment Future Minimum Quantity Required in Two Year	24
Aircraft Lease Commitment Future Minimum Quantity Required In Two Year	39
Aircraft Purchase Committment Future Minimum Quantity Required In Three Year	13
Aircraft Lease Commitment Future Minimum Quantity Required In Three Year	50
Aircraft Purchase Committment Future Minimum Quantity Required In Four Year	15
Aircraft Lease Commitment Future Minimum Quantity Required In Four Year	45
Aircraft Purchase Committment Future Minimum Quantity Required In Five Year	19
Aircraft Lease Commitment Future Minimum Quantity Required In Five Year	40
Aircraft Purchase Committment Future Minimum Quantity Required Five and Thereafter	227
Aircraft Lease Commitment Future Minimum Quantity Required Five and Thereafter	0
Total, Purchase	325
Total, Lease	194
Embraer One Seven Five [Member]
Property Subject to or Available for Operating Lease [Line Items]
First Class Seats	12
Main Cabin Seats	64
Aircraft to be acquired by Republic Airlines	47
Boeing Seven Three Seven Family [Member]
Property Subject to or Available for Operating Lease [Line Items]
Option to Purchase Aircraft	40
Aircraft Purchase Committment Future Minimum Quantity Required Current	22
Aircraft Lease Commitment Future Minimum Quantity Required Current	0
Aircraft Purchase Committment Future Minimum Quantity Required in Two Year	16
Aircraft Lease Commitment Future Minimum Quantity Required In Two Year	4
Aircraft Purchase Committment Future Minimum Quantity Required In Three Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Three Year	20
Aircraft Purchase Committment Future Minimum Quantity Required In Four Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Four Year	20
Aircraft Purchase Committment Future Minimum Quantity Required In Five Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Five Year	20
Aircraft Purchase Committment Future Minimum Quantity Required Five and Thereafter	0
Aircraft Lease Commitment Future Minimum Quantity Required Five and Thereafter	0
Total, Purchase	38
Total, Lease	64
Boeing Seven Seven Seven Family [Member]
Property Subject to or Available for Operating Lease [Line Items]
Option to Purchase Aircraft	13
Boeing 777-300ER Aircraft [Member]
Property Subject to or Available for Operating Lease [Line Items]
Aircraft Purchase Committment Future Minimum Quantity Required Current	5
Aircraft Lease Commitment Future Minimum Quantity Required Current	0
Aircraft Purchase Committment Future Minimum Quantity Required in Two Year	6
Aircraft Lease Commitment Future Minimum Quantity Required In Two Year	0
Aircraft Purchase Committment Future Minimum Quantity Required In Three Year	2
Aircraft Lease Commitment Future Minimum Quantity Required In Three Year	0
Aircraft Purchase Committment Future Minimum Quantity Required In Four Year	2
Aircraft Lease Commitment Future Minimum Quantity Required In Four Year	0
Aircraft Purchase Committment Future Minimum Quantity Required In Five Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Five Year	0
Aircraft Purchase Committment Future Minimum Quantity Required Five and Thereafter	0
Aircraft Lease Commitment Future Minimum Quantity Required Five and Thereafter	0
Total, Purchase	15
Total, Lease	0
Airbus A320 Family [Member]
Property Subject to or Available for Operating Lease [Line Items]
Aircraft Purchase Committment Future Minimum Quantity Required Current	0
Aircraft Lease Commitment Future Minimum Quantity Required Current	20
Aircraft Purchase Committment Future Minimum Quantity Required in Two Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Two Year	35
Aircraft Purchase Committment Future Minimum Quantity Required In Three Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Three Year	30
Aircraft Purchase Committment Future Minimum Quantity Required In Four Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Four Year	25
Aircraft Purchase Committment Future Minimum Quantity Required In Five Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Five Year	20
Aircraft Purchase Committment Future Minimum Quantity Required Five and Thereafter	0
Aircraft Lease Commitment Future Minimum Quantity Required Five and Thereafter	0
Total, Purchase	0
Total, Lease	130
Boeing Seven Three Seven Max Aircraft [Member]
Property Subject to or Available for Operating Lease [Line Items]
Option to Purchase Aircraft	60
Aircraft to be acquired	100
Aircraft Purchase Committment Future Minimum Quantity Required Current	0
Aircraft Lease Commitment Future Minimum Quantity Required Current	0
Aircraft Purchase Committment Future Minimum Quantity Required in Two Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Two Year	0
Aircraft Purchase Committment Future Minimum Quantity Required In Three Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Three Year	0
Aircraft Purchase Committment Future Minimum Quantity Required In Four Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Four Year	0
Aircraft Purchase Committment Future Minimum Quantity Required In Five Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Five Year	0
Aircraft Purchase Committment Future Minimum Quantity Required Five and Thereafter	100
Aircraft Lease Commitment Future Minimum Quantity Required Five and Thereafter	0
Total, Purchase	100
Total, Lease	0
Boeing Seven Eight Seven Family [Member]
Property Subject to or Available for Operating Lease [Line Items]
Option to Purchase Aircraft	58
Aircraft Purchase Committment Future Minimum Quantity Required Current	0
Aircraft Lease Commitment Future Minimum Quantity Required Current	0
Aircraft Purchase Committment Future Minimum Quantity Required in Two Year	2
Aircraft Lease Commitment Future Minimum Quantity Required In Two Year	0
Aircraft Purchase Committment Future Minimum Quantity Required In Three Year	11
Aircraft Lease Commitment Future Minimum Quantity Required In Three Year	0
Aircraft Purchase Committment Future Minimum Quantity Required In Four Year	13
Aircraft Lease Commitment Future Minimum Quantity Required In Four Year	0
Aircraft Purchase Committment Future Minimum Quantity Required In Five Year	9
Aircraft Lease Commitment Future Minimum Quantity Required In Five Year	0
Aircraft Purchase Committment Future Minimum Quantity Required Five and Thereafter	7
Aircraft Lease Commitment Future Minimum Quantity Required Five and Thereafter	0
Total, Purchase	42
Total, Lease	0
Neo Airbus Aircraft [Member]
Property Subject to or Available for Operating Lease [Line Items]
Aircraft Purchase Committment Future Minimum Quantity Required Current	0
Aircraft Lease Commitment Future Minimum Quantity Required Current	0
Aircraft Purchase Committment Future Minimum Quantity Required in Two Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Two Year	0
Aircraft Purchase Committment Future Minimum Quantity Required In Three Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Three Year	0
Aircraft Purchase Committment Future Minimum Quantity Required In Four Year	0
Aircraft Lease Commitment Future Minimum Quantity Required In Four Year	0
Aircraft Purchase Committment Future Minimum Quantity Required In Five Year	10
Aircraft Lease Commitment Future Minimum Quantity Required In Five Year	0
Aircraft Purchase Committment Future Minimum Quantity Required Five and Thereafter	120
Aircraft Lease Commitment Future Minimum Quantity Required Five and Thereafter	0
Total, Purchase	130
Total, Lease	0
Maximum [Member] | Embraer One Seven Five [Member]
Property Subject to or Available for Operating Lease [Line Items]
Aircraft phased into operation each month	3
Minimum [Member] | Embraer One Seven Five [Member]
Property Subject to or Available for Operating Lease [Line Items]
Aircraft phased into operation each month	2