Subsequent Events Subsequent Event (Narratives) (Details) $ in Millions, ₩ in Trillions	3 Months Ended
	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Apr. 10, 2020 USD ($)	Apr. 10, 2020 KRW (₩)	Dec. 31, 2019 USD ($)
Subsequent Event [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		$ (338)	$ 1,140
Net income (loss)		(270)	937
Derivative Asset, Fair Value, Gross Asset		35,064				$ 14,386
Income Tax Expense (Benefit)		(58)	232
The Prudential Life Insurance Company of Korea, Ltd.
Subsequent Event [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest		228	$ 53
Derivative Asset, Fair Value, Gross Asset		$ 70
Subsequent Event | The Prudential Life Insurance Company of Korea, Ltd.
Subsequent Event [Line Items]
Cash considerations for sale of a business				$ 1,900	₩ 2.3
Net income (loss)	$ 600
Income Tax Expense (Benefit)	$ 100