Number of shares repurchased in the accelerated share repurchase program.

No definition available.

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- Definition

The value of a forward purchase contract reported in additional paid-in capital.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

This element represents the maximum amount authorized for share repurchase by the board of directors.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

Volume weighted average price of common stock over the term of an accelerated share repurchase program.

+ References

No definition available.

+ Details

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Namespace Prefix:	pfg_
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Balance Type:	na
Period Type:	duration

- Definition

Amount of cash receipt from (payment to) bank; or stock received from (issuance to) bank in the settlement of the accelerated share repurchase agreement.

+ References

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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- References

No definition available.

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- References

No definition available.

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- Definition

Number of shares issued which are neither cancelled nor held in the treasury.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of new stock issued during the period.

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Period Type:	duration

- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

+ Details

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- Details

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Stockholders' Equity - Common Stock Dividends and Reconciliation of Outstanding Common Shares (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended								12 Months Ended
	Feb. 28, 2025	Feb. 29, 2024	Sep. 30, 2022	Aug. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Jan. 31, 2022	Jun. 30, 2021	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Aug. 16, 2022
Common Stock Dividends
Dividends declared per common share (in dollars per share)									$ 2.85	$ 2.6	$ 2.56
Common stock share repurchase disclosures
Amount of forward contract recorded in additional paid in capital											$ 33.9
Common stock
Reconciliation of Outstanding Common Shares
Outstanding shares at beginning of period							261,673,076		236,438,294	243,549,782	261,673,076
Shares issued									2,455,503	2,469,841	4,937,910
Treasury stock acquired									(12,668,636)	(9,581,329)	(23,061,204)
Outstanding shares at end of period									226,225,161	236,438,294	243,549,782
Common stock share repurchase disclosures
Share repurchase program, maximum authorized amount (in dollars)	$ 1,500.0	$ 1,500.0					$ 1,600.0	$ 1,200.0
Common stock \| March 2022 Accelerated Share Repurchase Program
Common stock share repurchase disclosures
Share repurchase program, maximum authorized amount (in dollars)						$ 700.0
Number of shares repurchased					1,400,000	8,500,000
Initial cost of shares repurchased						$ 560.0
Amount of forward contract recorded in additional paid in capital						$ 140.0
Volume-weighted average price of our common stock					$ 70.53
Common stock \| August 2022 Accelerated Share Repurchase Program
Common stock share repurchase disclosures
Share repurchase program, maximum authorized amount (in dollars)				$ 400.0
Number of shares repurchased			1,200,000	4,100,000
Initial cost of shares repurchased												$ 320.0
Volume-weighted average price of our common stock			$ 76.48