XML 65 R50.htm IDEA: XBRL DOCUMENT v3.22.0.1

Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2021

Stock-Based Compensation Plans

Stock-Based Compensation Disclosures (Table)

​

​	​	​	​	​	​	​	​	​	​	​
​	​	For the year ended December 31,
​		2021			2020			2019
​	​	(in millions)
Compensation cost	​	$	95.2	​	$	86.7	​	$	78.7	​
Related income tax benefit	​	​	19.9	​		17.1	​		16.8	​
Capitalized as part of an asset	​	​	1.4	​		1.5	​		1.7	​

Nonqualified Stock Options Status (Table)

​

​	​	​	​	​	​	​	​	​	​
​	​	​	​	Weighted-		​	​	​
​	​	​	​	average		​	​	​
​		Number of options		exercise price			Intrinsic value
​	​	(in millions)	​	​	​	​	(in millions)
Options outstanding as of January 1, 2021		6.5	​	$	49.52	​	​	​	​
Granted	​	0.8	​	​	58.68	​	​	​	​
Exercised	​	1.0	​	​	41.92	​	​	​	​
Canceled	​	0.1	​	​	56.93	​	​	​	​
Options outstanding as of December 31, 2021	​	6.2	​	$	51.89	​	$	126.9	​
Options vested or expected to vest as of December 31, 2021	​	6.2	​	$	51.88	​	$	126.7	​
Options exercisable as of December 31, 2021	​	4.6	​	$	50.76	​	$	99.2	​

Nonqualified Stock Options Remaining Contractual Lives and Range of Exercise Prices (Table)

​

​	​	​	​	​	​
​	​	​	​	Weighted-
​	​	Number of options	​	average remaining
Range of exercise prices		outstanding		contractual life
​	​	(in millions)	​	​
$27.46 - $48.11	​	1.4	​	2.5	​
$48.12 - $52.41	​	1.6	​	7.0	​
$52.42 - $55.89	​	1.1	​	7.2	​
$55.90 - $62.75	​	0.8	​	9.1	​
$62.76 - $63.98	​	1.3	​	5.7	​
$27.46 - $63.98	​	6.2	​	​	​

Nonqualified Stock Options Fair Value (Table)

​

​	​	​	​	​	​	​	​	​	​	​
​	​	For the year ended December 31,
Options		2021			2020			2019
Expected volatility	​	​	34.2	%	​	25.7	%	​	23.3	%
Expected term (in years)	​	​	7.0	​	​	7.0	​	​	7.0	​
Risk-free interest rate	​	​	1.2	%	​	1.3	%	​	2.6	%
Expected dividend yield	​	​	3.82	%	​	4.33	%	​	4.07	%
Weighted average estimated fair value	​	$	15.67	​	$	9.64	​	$	10.00	​

Nonvested Performance Share Awards Activity (Table)

​

​	​	​	​	​	​	​
​	​	Number of	​	Weighted-
​	​	performance	​	average grant-date
​		share awards		fair value
​	​	(in millions)	​	​	​
Nonvested performance share awards as of January 1, 2021		0.7	​	$	55.28	​
Granted	​	0.2	​	​	58.68	​
Vested	​	0.1	​	​	63.98	​
Canceled	​	0.1	​	​	62.16	​
Nonvested performance share awards as of December 31, 2021	​	0.7	​	$	54.37	​

Nonvested Restricted Stock Units Activity (Table)

​

​	​	​	​	​	​	​
​	​	Number of	​	Weighted-
​	​	restricted	​	average grant-date
​		stock units		fair value
​	​	(in millions)	​	​	​
Nonvested restricted stock units as of January 1, 2021		2.8	​	$	54.86	​
Granted	​	1.1	​	​	59.17	​
Vested	​	0.8	​	​	62.01	​
Canceled	​	0.1	​	​	55.50	​
Nonvested restricted stock units as of December 31, 2021	​	3.0	​	$	54.50	​

X

- Definition

Tabular disclosure of compensation-related costs for share-based compensation, including amounts charged to income and amount capitalized as part of an asset.

+ References

No definition available.

+ Details

Name:	pfg_ScheduleOfCompensationRelatedCostsChargedToIncomeOrCapitalizedAsAssetTableTextBlock
Namespace Prefix:	pfg_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the changes in outstanding nonvested performance-based units.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfNonvestedPerformanceBasedUnitsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the changes in outstanding nonvested restricted stock units.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration