Acquisitions and Dispositions - Acquired Entities (Details) - USD ($) $ in Millions				12 Months Ended
	Oct. 03, 2022	Jan. 31, 2022	Apr. 01, 2021	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Mar. 31, 2021	Mar. 09, 2020	Jul. 18, 2017
Business Acquisition [Line Items]
G4S intercompany payments				$ (36.3)	$ 139.2		$ 45.1
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Restricted cash				507.0	438.5
Right-of-use assets, net				337.7	314.5
Goodwill				1,473.8	1,450.9		1,411.7
Contingent consideration payment				11.1	2.8		4.0
Contingent consideration derecognition gain				(6.2)	0.0		0.0
Transaction Costs				4.2	5.6		6.5
NoteMachine
Business Acquisition [Line Items]
Acquisition date	Oct. 03, 2022
Percentage of shares acquired	100.00%
Annual revenues						$ 150.0
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Purchase consideration - cash paid				179.4
Contingent consideration	$ 14.8
Fair value of purchase consideration	194.2
Cash	6.8
Restricted cash	12.1
Accounts receivables	27.3
Other current assets	14.5
Property and Equipment, net	38.2
Intangible assets	84.2
Goodwill	64.2
Other noncurrent assets	11.1
Current liabilities	(37.0)
Noncurrent liabilities	(27.2)
Fair value of net assets acquired	194.2
Contingent consideration payment				10.3
NoteMachine | Post-Acquisition Collection of ATM Tax Rate Rebates
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Contingent consideration	10.5
Contingent consideration payment				10.0
NoteMachine | ATM Cash Withdrawal Interchange Fees
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Contingent consideration	4.3
Contingent consideration derecognition gain				4.8
NoteMachine | Europe
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill				63.0
NoteMachine | North America
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill				1.0
Touchpoint 21 LLC
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Fair value of purchase consideration		$ 15.0
Contingent consideration payment				0.8
PAI
Business Acquisition [Line Items]
Percentage of shares acquired			100.00%
Annual revenues								$ 94.0
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Purchase consideration - cash paid			$ 215.5
Fair value of purchase consideration			215.5
Cash			12.3
Accounts receivables			7.3
Other current assets			5.5
Property and Equipment, net			14.6
Intangible assets			95.0
Goodwill			126.1
Other noncurrent assets			4.5
Current liabilities			(41.2)
Noncurrent liabilities			(8.6)
Fair value of net assets acquired			215.5
Contingent consideration payment					2.8		1.1
PAI | North America
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill			2.0
G4Si
Business Acquisition [Line Items]
Percentage of shares acquired											100.00%
G4S
Business Acquisition [Line Items]
Percentage of shares acquired										100.00%
Annual revenues									$ 800.0
G4S intercompany payments				114.0
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Purchase consideration - cash paid				816.9
Contingent consideration				22.0
Liabilities assumed from seller				2.9
Indemnification assets				(15.9)
Fair value of purchase consideration				825.9
Cash				244.4
Restricted cash				30.1
Accounts receivables				145.8
Other current assets				30.8
Property and Equipment, net				123.8
Right-of-use assets, net				77.5
Intangible assets				207.0
Goodwill				534.1
Other noncurrent assets				16.2
Current liabilities				(296.3)
Lease liability				(68.1)
Noncurrent liabilities				(103.9)
Fair value of net assets acquired				941.4
Fair value of noncontrolling interest				(115.5)
Contingent consideration payment							$ 3.2
G4S | Europe
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill				191.0
G4S | Rest of World
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill				340.0
G4S | Latin America
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill				3.0
G4S Tranche III
Business Acquisition [Line Items]
Percentage of shares acquired										100.00%
Maco
Business Acquisition [Line Items]
Percentage of shares acquired												100.00%
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Severance Costs				$ 4.9	$ 12.5
Customer relationships | NoteMachine
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets	47.0
Remaining Amortization Period				13 years
Customer relationships | PAI
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets			$ 60.0
Remaining Amortization Period			10 years
Customer relationships | G4S
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets				$ 207.0
Remaining Amortization Period				15 years
Developed technology | NoteMachine
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets	27.0
Remaining Amortization Period				12 years
Developed technology | PAI
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets			$ 26.0
Remaining Amortization Period			12 years
Finite-lived trade names | NoteMachine
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets	$ 10.0
Remaining Amortization Period				5 years
Finite-lived trade names | PAI
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets			$ 9.0
Remaining Amortization Period			5 years