Unaudited Condensed Consolidated Balance Sheets (Parentheticals) (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Balance Sheets Parentheticals [Line Items]
Receivables, allowance for doubtful accounts	$ 13	$ 27
Par value	$ 0.01
Common shares, authorized	100	500,000,000
Common shares, issued	100	295,000,000
Common shares, outstanding	100	295,000,000
PEC [Member]
Balance Sheets Parentheticals [Line Items]
Receivables, allowance for doubtful accounts	8	9
Common shares, authorized	200,000,000	200,000,000
Common shares, issued	160,000,000	160,000,000
Common shares, outstanding	160,000,000	160,000,000
PEF [Member]
Balance Sheets Parentheticals [Line Items]
Receivables, allowance for doubtful accounts	$ 5	$ 18
Common shares, authorized	60,000,000	60,000,000
Common shares, issued	100	100
Common shares, outstanding	100	100