SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Guaranteed Living Withdrawal Benefits (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Variable annuity \| Guaranteed living withdrawal benefits (GLWB)
Guaranteed Minimum Withdrawal Benefits
Guaranteed living withdrawal benefits liability held, net	$ 475	$ 822

Represents the amount of expected guaranteed benefits in short of the projected account balances for minimum guaranteed benefit contracts, net of reinsurance recoverables, as of the balance sheet date.

No definition available.

Name:	plico_LiabilitiesForGuaranteesOnLongDurationContractsGuaranteedBenefitAssetNet
Namespace Prefix:	plico_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant