XML 56 R46.htm IDEA: XBRL DOCUMENT v3.25.3

Settlement Assets and Obligations - Components of Investment Securities (Details) - USD ($) $ in Millions		Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024
Cash and cash equivalents
Amortized Cost		$ 947.8	$ 1,474.0	$ 1,097.6
Available-for-sale securities:
Fair Value		1,449.4
Settlement Assets
Available-for-sale securities:
Amortized Cost		1,450.8	1,372.9
Fair Value		1,449.4	1,332.3
Gross Unrealized Gains		21.8	6.1
Gross Unrealized Losses		(23.2)	(46.7)
Net Unrealized Gains/ (Losses)		(1.4)	(40.6)
Amortized Cost		1,478.9	1,405.5
Fair Value		1,477.5	1,364.9
Gross Unrealized Gains		21.8	6.1
Gross Unrealized Losses		(23.2)	(46.7)
Net Unrealized Gains/ (Losses)		(1.4)	(40.6)
Money market funds | Settlement Assets
Cash and cash equivalents
Amortized Cost		28.1	32.6
Fair Value		28.1	32.6
State and municipal debt securities | Settlement Assets
Available-for-sale securities:
Amortized Cost	[1]	1,131.7	1,069.5
Fair Value	[1]	1,123.0	1,029.0
Gross Unrealized Gains	[1]	12.6	2.7
Gross Unrealized Losses	[1]	(21.3)	(43.2)
Net Unrealized Gains/ (Losses)	[1]	(8.7)	(40.5)
Asset-backed securities | Settlement Assets
Available-for-sale securities:
Amortized Cost		167.1	208.6
Fair Value		170.0	211.2
Gross Unrealized Gains		2.9	2.6
Net Unrealized Gains/ (Losses)		2.9	2.6
Corporate debt securities | Settlement Assets
Available-for-sale securities:
Amortized Cost		147.6	87.5
Fair Value		152.1	85.0
Gross Unrealized Gains		6.3	0.8
Gross Unrealized Losses		(1.8)	(3.3)
Net Unrealized Gains/ (Losses)		4.5	(2.5)
United States government agency mortgage-backed securities | Settlement Assets
Available-for-sale securities:
Amortized Cost		4.4	7.3
Fair Value		4.3	7.1
Gross Unrealized Losses		(0.1)	(0.2)
Net Unrealized Gains/ (Losses)		$ (0.1)	$ (0.2)
[1] The majority of these securities are fixed-rate instruments.

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483467/210-10-45-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-4

+ Details

Name:	us-gaap_CashAndCashEquivalentsAtCarryingValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-11

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

Name:	us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount, before tax, of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- Definition

This item represents the cost of debt and equity securities, which are not categorized as trading. For available-for-sale securities this amount is net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any. For held-to-maturity securities, this amount is before other than temporary impairment (OTTI) accretion.

+ References

No definition available.

+ Details

Name:	wu_AvailableForSaleAndHeldToMaturitySecuritiesAmortizedCost
Namespace Prefix:	wu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value of investments in debt and equity securities classified as available-for-sale and held-to-maturity.

+ References

No definition available.

+ Details

Name:	wu_AvailableForSaleAndHeldToMaturitySecuritiesFairValue
Namespace Prefix:	wu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Total accumulated gross unrealized gain for securities classified as either available-for-sale or held-to-maturity. For available-for-sale securities, it is the amount before tax of unrealized gain in accumulated other comprehensive income on investments in debt and equity securities. For held-to-maturity securities, is is the amount of accumulated unrealized gain on investments in debt securities.

+ References

No definition available.

+ Details

Name:	wu_Availableforsaleandheldtomaturitysecuritiesaccumulatedgrossunrealizedgain
Namespace Prefix:	wu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Total accumulated gross unrealized gain (loss) for securities classified as either available-for-sale or held-to-maturity. For available for sale securities, it is the amount before tax of unrealized gain (loss) in accumulated other comprehensive income on investments in debt and equity securities. For held-to-maturity, it is the amount of the accumulated net unrecognized gain (loss) on investments in debt securities.

+ References

No definition available.

+ Details

Name:	wu_Availableforsaleandheldtomaturitysecuritiesaccumulatedgrossunrealizedgainloss
Namespace Prefix:	wu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Total accumulated gross unrealized loss for securities classified as either available-for-sale or held-to-maturity. For available-for-sale securities, it is the amount before tax of unrealized loss in accumulated other comprehensive income on investments in debt and equity securities. For held-to-maturity securities, it is the amount of accumulated unrealized loss on investments in debt securities.

+ References

No definition available.

+ Details

Name:	wu_Availableforsaleandheldtomaturitysecuritiesaccumulatedgrossunrealizedloss
Namespace Prefix:	wu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	wu_CashAmortizedCostAbstract
Namespace Prefix:	wu_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_BalanceSheetLocationAxis=wu_SettlementAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MoneyMarketFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: