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Investments (Schedule Of Increase (Decrease) In Payables For Collateral On Investments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Increase (decrease) in payables for collateral on investments
Collateral payable for derivative investments	$ 1,588	$ 751	$ (128)
Securities pledged under securities lending agreements	2	26	(134)
Securities pledged under repurchase agreements		(150)	(380)
Investments pledged for FHLBI	(450)	(350)	1,030
Total increase (decrease) in payables for collateral on investments	$ 1,140	$ 277	$ 388

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- Definition

The net change during the reporting period in the amount of cash that is received related to collateral payable held for derivative instruments.

+ References

No definition available.

+ Details

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Period Type:	duration

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- Definition

The net change during the reporting period in the amount of cash that is received related to securities pledged under reverse repurchase agreements

+ References

No definition available.

+ Details

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- Definition

The net change during the reporting period in the amount of cash that is received related to securities pledged under securities lending agreements.

+ References

No definition available.

+ Details

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- Definition

The net change during the reporting period in the amount of cash that is received related to securities pledged for Federal Home Loan Bank of Indianapolis.

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No definition available.

+ Details

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X

- Definition

The increase (decrease) during the reporting period in the amount that is received as security when loaning securities.

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No definition available.

+ Details

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Namespace Prefix:	lnc_
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- References

No definition available.

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