Consolidated Statements of Cash Flows - Significant Non Cash Transactions (Parenthetical) $ in Millions	12 Months Ended
Dec. 31, 2014 USD ($)
Statement of Cash Flows [Abstract]
Decrease From Reinsurance Amendments During Noncash or Partial Noncash Transaction	$ 178
Decrease From Noncash Tax Settlement With Affiliate	$ 61

Decrease From Reinsurance Amendments During Noncash or Partial Noncash Transaction

No definition available.

Name:	cik777917_DecreaseFromReinsuranceAmendmentsDuringNoncashorPartialNoncashTransaction
Namespace Prefix:	cik777917_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration