Related Party (Affiliated Asset Administration Fee Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Related Party Transactions [Abstract]
AST Revenue Sharing Income	$ 55.8	$ 64.9	$ 112.9	$ 129.5

Income associated with the Pruco-AST revenue sharing agreement.

No definition available.

Name:	cik881453_AstRevenueSharingIncome
Namespace Prefix:	cik881453_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration