Revenue Earning Equipment (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Summary of revenue earning equipment
Cost	$ 10,536,606,000	$ 10,536,606,000	$ 10,086,939,000
Accumulated Depreciation	(3,606,141,000)	(3,606,141,000)	(3,596,102,000)
Net Book Value	6,930,465,000	6,930,465,000	6,490,837,000
Effect of change in estimated residual values of revenue earning equipment on pre tax earnings	6,300,000	12,500,000
Held for use: Full service lease [Member]
Summary of revenue earning equipment
Cost	7,699,750,000	7,699,750,000	7,436,093,000
Accumulated Depreciation	(2,564,790,000)	(2,564,790,000)	(2,537,077,000)
Net Book Value	5,134,960,000	5,134,960,000	4,899,016,000
Held for use: Commercial rental [Member]
Summary of revenue earning equipment
Cost	2,491,695,000	2,491,695,000	2,210,863,000
Accumulated Depreciation	(791,662,000)	(791,662,000)	(747,283,000)
Net Book Value	1,700,033,000	1,700,033,000	1,463,580,000
Held-for-sale [Member]
Summary of revenue earning equipment
Cost	345,161,000	345,161,000	439,983,000
Accumulated Depreciation	(249,689,000)	(249,689,000)	(311,742,000)
Net Book Value	$ 95,472,000	$ 95,472,000	$ 128,241,000