| Proceeds from (Repayments of) Long-Term Debt and Capital Securities | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Proceeds from (Repayments of) Long-Term Debt and Capital Securities, Total | en-US | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Amount of cash inflow (outflow) from long-term debt, including capital lease obligations and mandatory redeemable capital securities. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |