Customer Financing (Schedule of Customer Financing Carrying Values Related to Major Aircraft Concentrations) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Customer Financing [Line Items]
Gross customer financing	$ 3,582	$ 4,020
Operating lease equipment	1,677	1,734
717 Aircraft [Member]
Customer Financing [Line Items]
Gross customer financing	1,562	1,674
Operating lease equipment	421	444
B747 aircraft [Member]
Customer Financing [Line Items]
Gross customer financing	601	286
Operating lease equipment	601	183
757 Aircraft [Member]
Customer Financing [Line Items]
Gross customer financing	370	453
Operating lease equipment	349	402
MD-80 Aircraft [Member]
Customer Financing [Line Items]
Gross customer financing	358	411
Operating lease equipment
767 Aircraft [Member]
Customer Financing [Line Items]
Gross customer financing	158	207
Operating lease equipment	47	60
737 Aircraft [Member]
Customer Financing [Line Items]
Gross customer financing	156	210
Operating lease equipment	127	138
MD-11 Aircraft [Member]
Customer Financing [Line Items]
Gross customer financing	114	220
Operating lease equipment	114	220
787 Aircraft [Member]
Customer Financing [Line Items]
Gross customer financing		273
Operating lease equipment		$ 273