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Equity (Narrative) (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
May. 14, 2014 | Jun. 30, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Feb. 29, 2016 | May. 31, 2015 | Feb. 28, 2015
Share Capital [Line Items] |  |  |  |  |  |  |
Share repurchase program, authorized amount |  |  |  |  |  | $ 750,000,000 | $ 250,000,000
Share repurchase program, authorized amount increase |  |  |  |  |  | $ 500,000,000 |
ILFC [Member] |  |  |  |  |  |  |
Share Capital [Line Items] |  |  |  |  |  |  |
Shares issued for acquisition | 97,560,976 |  |  |  |  |  |
Cash consideration | $ 2,400,000,000 |  |  |  |  |  |
Percentage of voting interest sold by counterparty |  |  | 100.00% |  |  |  |
AIG [Member] |  |  |  |  |  |  |
Share Capital [Line Items] |  |  |  |  |  |  |
Approximate price per share |  | $ 47.77 |  |  |  |  |
Cash consideration for share repurchase |  | $ 250,000,000 |  |  |  |  |
Stock repurchase program, expense |  |  | $ 11,200,000 |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |
Share Capital [Line Items] |  |  |  |  |  |  |
Share repurchase program, authorized amount |  |  |  |  | $ 400,000,000 |  |
Ordinary Share Capital [Member] |  |  |  |  |  |  |
Share Capital [Line Items] |  |  |  |  |  |  |
Shares issued for acquisition |  |  |  | 97,560,976 |  |  |
Share cancellation, shares |  |  | (9,698,588) |  |  |  |

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