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Shareholders' Equity - Redomestication Narrative (Details) - USD ($) | Feb. 23, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Aug. 31, 2015 | Nov. 30, 2014
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Subsequent Event [Line Items] |  |  |  |  |
Distributable reserves available amount |  | $ 1,600,000,000 | $ 2,100,000,000 |  |
Share Repurchase Program of 2014 |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Share repurchase authorization limit |  |  |  | $ 5,000,000,000 | $ 5,000,000,000.0
Share Repurchase Program of 2014 | Subsequent Event |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Share repurchase authorization limit | $ 5,000,000,000.0 |  |  |  |

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- Definition Represents the amount of distributable reserves maintained by the entity. + References No definition available. + Details
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Details
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- Details
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