Statutory Net Income and Surplus and Dividend Restrictions (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	$ 262	$ 192	$ (503)
Statutory Accounting Practices, Statutory Capital and Surplus Required	1,665	1,461
Statutory surplus capacity to pay divided without prior approval in 2020	21
Statutory dividend paid to Prudential Insurance	250	$ 0	$ 250
Extra-ordinary dividend
Statutory Accounting Practices [Line Items]
Statutory dividend paid to Prudential Insurance	$ 104
Pruco Life Insurance
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices Dividends And Distributions Surplus Restriction	10.00%
Surplus dividends paid
Statutory Accounting Practices [Line Items]
Statutory dividend paid to Prudential Insurance	$ 146