Short-Term and Long-Term Debt (Short-Term Debt) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Short-term Debt [Line Items]
Short-term debt	$ 2,539	$ 1,933
Weighted average interest rate on outstanding short-term debt	0.79%	1.61%
Commercial paper
Short-term Debt [Line Items]
Short-term debt	$ 1,153	$ 549
Weighted average maturity of outstanding commercial paper, in days	9 days	6 days
Long-term debt
Short-term Debt [Line Items]
Short-term debt	$ 1,370	$ 1,371
Borrowings due overnight \| Commercial paper
Short-term Debt [Line Items]
Short-term debt	576	224
Daily average outstanding \| Commercial paper
Short-term Debt [Line Items]
Short-term debt	1,495	1,702
Prudential Financial
Short-term Debt [Line Items]
Short-term debt	1,632	1,204
Prudential Financial \| Commercial paper
Short-term Debt [Line Items]
Short-term debt	453	25
Prudential Funding, LLC \| Commercial paper
Short-term Debt [Line Items]
Short-term debt	700	524
Mortgages
Short-term Debt [Line Items]
Short-term debt	191	192
Line of Credit
Short-term Debt [Line Items]
Short-term debt	16	13
Senior notes
Short-term Debt [Line Items]
Short-term debt	1,500	$ 1,179
Long-term Debt, Current Maturities	$ 1,179

Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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+ References

No definition available.

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+ References

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+ References

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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