Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Debt (ECAPS subordinated notes) (Details)

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Debt (ECAPS subordinated notes) (Details) - Subordinated
1 Months Ended
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%