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Debt (ECAPS subordinated notes) (Details) - Subordinated | 1 Months Ended
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Dec. 31, 2005 USD ($)
Subordinated notes |
Debt Instrument [Line Items] |
Face amount | $ 1,000,000,000.0
ECAPS Subordinated Debt $400 Million Tranche |
Debt Instrument [Line Items] |
Face amount | $ 400,000,000.0
Spread over reference rate | 1.80%
ECAPS Subordinated Debt $600 Million Tranche |
Debt Instrument [Line Items] |
Face amount | $ 600,000,000.0
Spread over reference rate | 1.55%

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