Customer Financing (Carrying Values Related to Major Aircraft Concentrations) (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Customer Financing [Line Items]
Customer financing carrying value	$ 4,123	$ 4,211
Operating leases	1,723	1,922
B-717 [Member]
Customer Financing [Line Items]
Customer financing carrying value	1,233	1,282
Operating leases	296	301
B747-8 [Member]
Customer Financing [Line Items]
Customer financing carrying value	1,071	1,111
Operating leases	948	1,086
MD 80 Aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	263	259
B-757 [Member]
Customer Financing [Line Items]
Customer financing carrying value	241	246
Operating leases	42	43
B-777 [Member]
Customer Financing [Line Items]
Customer financing carrying value	177	165
Operating leases	16
B-767 [Member]
Customer Financing [Line Items]
Customer financing carrying value	161	170
Operating leases	80	85
B747-400 aircraft [Member]
Customer Financing [Line Items]
Customer financing carrying value	144	149
Operating leases	82	149
B-737 [Member]
Customer Financing [Line Items]
Customer financing carrying value	105	103
Operating leases	$ 100	$ 103