Statutory Net Income and Surplus and Dividend Restrictions (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	$ (828)	$ 262	$ 192
Statutory Accounting Practices, Statutory Capital and Surplus Required	1,304	1,665
Statutory surplus capacity to pay divided without prior approval in 2021	0
Statutory dividend paid to Prudential Insurance	$ 0	250	$ 0
Extra-ordinary dividend
Statutory Accounting Practices [Line Items]
Statutory dividend paid to Prudential Insurance		104
Surplus dividends paid
Statutory Accounting Practices [Line Items]
Statutory dividend paid to Prudential Insurance		$ 146
Pruco Life Insurance
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices Dividends And Distributions Surplus Restriction	10.00%