Business Description and Organization (Details)	12 Months Ended
	Dec. 31, 2011
Schedule of Limited Partnership Ownership Interest By Partners [Line Items]
Limited Partners or Members Ownership Interest in Company (in hundredths)	100.00%
AXA and its Subsidiaries Ownership Interest in Holding Company (in hundredths)	1.40%
General partnership information [Abstract]
General Partnership number of general partnership units owned in Holding Company (in units)	100,000
General Partner's general partnership interest in Company (in hundredths)	1.00%
AXA and its subsidiaries economic interest in Company (in hundredths)	64.40%
AXA And Its Subsidiaries [Member]
Schedule of Limited Partnership Ownership Interest By Partners [Line Items]
Limited Partners or Members Ownership Interest in Company (in hundredths)	60.90%
Holdings [Member]
Schedule of Limited Partnership Ownership Interest By Partners [Line Items]
Limited Partners or Members Ownership Interest in Company (in hundredths)	37.50%
Unaffiliated Holders [Member]
Schedule of Limited Partnership Ownership Interest By Partners [Line Items]
Limited Partners or Members Ownership Interest in Company (in hundredths)	1.60%