Fair Value Measurements (Schedule Of Valuation Technique And Related Unobservable Inputs For Level 3 Assets Measured At Fair Value On A Nonrecurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Jun. 30, 2011
Fair Value Measurements Nonrecurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Equipment under operating leases & Assets held for sale or re-lease, Fair Value	$ 25		$ 64
Fair Value Nonrecurring Median [Member] | Aircraft Value Publications [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Equipment under operating leases & Assets held for sale or re-lease, Median	35
Fair Value Nonrecurring Net [Member] | Aircraft Condition Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Equipment under operating leases & Assets held for sale or re-lease, Net	(10)
Minimum [Member] | Fair Value Nonrecurring Range [Member] | Aircraft Value Publications [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Equipment under operating leases & Assets held for sale or re-lease, Range	24
Minimum [Member] | Fair Value Nonrecurring Range [Member] | Aircraft Condition Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Equipment under operating leases & Assets held for sale or re-lease, Range	(10)
Maximum [Member] | Fair Value Nonrecurring Range [Member] | Aircraft Value Publications [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Equipment under operating leases & Assets held for sale or re-lease, Range	53	[1]
Maximum [Member] | Fair Value Nonrecurring Range [Member] | Aircraft Condition Adjustments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Line Items]
Equipment under operating leases & Assets held for sale or re-lease, Range	$ 0	[2]

[1] (1) The range represents the sum of the highest and lowest values for all aircraft subject to fair value measurement, according to the third party aircraft valuation publications that we use in our valuation process.

[2] (2) The negative amount represents the sum for all aircraft subject to fair value measurement, of all downward adjustments based on consideration of individual aircraft attributes and condition. The positive amount represents the sum of all such upward adjustments.