v3.21.1

INVESTMENT OPERATIONS - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) unrealized_loss_position	Dec. 31, 2020 USD ($)
Schedule of Investments [Line Items]
Unrealized loss, greater than 12 months	$ 71	$ 76
Total positions that were in an unrealized loss position \| unrealized_loss_position	845
Total positions that were in an unrealized loss position having allowance for credit loss established \| unrealized_loss_position	6
Fixed maturity securities - AFS	$ 67,710	70,119
Available-for-sale, amortized cost	64,222	63,220
Fixed maturity securities	2,833	2,958
Below investment grade
Schedule of Investments [Line Items]
Fixed maturity securities - AFS	3,000
Available-for-sale, amortized cost	3,000
Securities not publicly traded	508
Fixed maturity securities	134
Commercial mortgage-backed securities
Schedule of Investments [Line Items]
Unrealized loss, greater than 12 months	2	4
Fixed maturity securities - AFS	2,425	2,534
Available-for-sale, amortized cost	2,346	2,429
Fixed maturity securities	213	214
Other asset-backed securities
Schedule of Investments [Line Items]
Unrealized loss, greater than 12 months	$ 1	5
Underlying collateral percentage	9700.00%
Fixed maturity securities - AFS	$ 1,536	1,578
Available-for-sale, amortized cost	1,505	1,546
Fixed maturity securities	175	163
Corporate securities
Schedule of Investments [Line Items]
Unrealized loss, greater than 12 months	68	66
Fixed maturity securities - AFS	50,357	52,107
Available-for-sale, amortized cost	47,342	46,150
Fixed maturity securities	1,772	$ 1,860
Corporate securities \| Below investment grade
Schedule of Investments [Line Items]
Unrealized losses, greater than twelve months, credit related	$ 1

Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss, Credit Related

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PROTECTIVE LIFE INSURANCE CO 10-Q