XML 79 R68.htm IDEA: XBRL DOCUMENT v3.22.2

Derivatives - Undesignated Hedges (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Cash Flow and Fair Value Hedges
Foreign exchange losses on settlement assets and obligations, cash balances, and other assets and liabilities	$ 39.9	$ 3.2	$ 49.8	$ 25.0

X

- References

No definition available.

+ Details

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

X

- Definition

Represents Foreign Exchange Gain Loss on Settlement Assets and Obligations, Other Assets and Other Liabilities and Cash Balances

+ References

No definition available.

+ Details

Name:	wu_ForeignExchangeGainLossOnSettlementAssetsAndObligationsOtherAssetsAndOtherLiabilitiesAndCashBalances
Namespace Prefix:	wu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration