| **Subsequent Events**            | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
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| **Subsequent Events [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| Subsequent Events                | Subsequent EventsWe monitor significant events occurring after the balance sheet date and prior to the issuance of the financial statements to determine the impacts, if any, of events on the financial statements to be issued. All subsequent events of which we are aware were evaluated. For information on subsequent event disclosure items related to regulatory matters, short-term debt instruments, employee share-based plans and equity method investments, see Note 3, Note 6, Note 11 and Note 13, respectively, to the consolidated financial statements. |

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| - Definition
The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.
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