Commitments, Contingencies and Off-Balance Sheet Arrangements (Tables)

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Contractual Obligations

Our future minimum cash payments, including interest, associated with our contractual obligations pursuant to the Senior Notes, Note purchase agreements, Credit Agreement, Premium Financing Debt Facility, operating leases and purchase commitments at December 31, 2023 were as follows (in millions):

	Payments Due by Period
Contractual Obligations	2023			2024			2025			2026			2027			Thereafter			Total
Senior Notes	$	—		$	—		$	—		$	—		$	—		$	3,550.0		$	3,550.0
Note purchase agreements		425.0			200.0			640.0			478.0			200.0			2,005.0			3,948.0
Credit Agreement		245.0			—			—			—			—			—			245.0
Premium Financing Debt Facility		289.0			—			—			—			—			—			289.0
Interest on debt		311.9			317.9			299.1			280.6			261.3			3,374.8			4,845.6
Total debt obligations		1,270.9			517.9			939.1			758.6			461.3			8,929.8			12,877.6
Operating lease obligations		108.9			100.4			84.0			67.6			50.6			81.8			493.3
Less sublease arrangements		(2.4	)		(1.8	)		(1.7	)		(1.6	)		(1.1	)		(0.8	)		(9.4	)
Outstanding purchase obligations		116.5			59.0			24.9			20.2			15.0			47.1			282.7
Total contractual obligations	$	1,493.9		$	675.5		$	1,046.3		$	844.8		$	525.8		$	9,057.9		$	13,644.2

Off-Balance Sheet Commitments

Off-Balance Sheet Commitments - Our total unrecorded commitments associated with outstanding letters of credit, financial guarantees and funding commitments at December 31, 2023 were as follows (in millions):

													Total
	Amount of Commitment Expiration by Period												Amounts
Off-Balance Sheet Commitments	2024		2025		2026		2027		2028		Thereafter		Committed
Letters of credit	$	—	$	—	$	—	$	—	$	—	$	21.2	$	21.2
Financial guarantees		2.0		0.2		0.1		0.1		—		—		2.4
Total commitments	$	2.0	$	0.2	$	0.1	$	0.1	$	—	$	21.2	$	23.6

Outstanding Letters of Credit and Funding Commitments

Our commitments associated with outstanding letters of credit, financial guarantees and funding commitments at December 31, 2023 were as follows (all dollar amounts in table are in millions):

Description, Purpose and Trigger	Collateral	Compensation to Us	Maximum Exposure		Liability Recorded
Other investments
Funding commitment to an equity investment -    to be funded in 2024	None	None	$	—	$	—
Trigger - Agreed conditions met
Other
Credit support under letters of credit (LOC) for    deductibles due by us on our own insurance    coverages - expires after 2028	None	None		9.3		13.7
Trigger - We do not reimburse the insurance    companies for deductibles the insurance companies    advance on our behalf
Credit enhancement under letters of credit for our    captive insurance operations to meet minimum    statutory capital requirements - expires after 2024 and 2028	None	Reimbursement of LOC fees		10.5		—
Trigger - Dissolution or catastrophic financial    results of the operation
Collateral related to claims funds held in a fiduciary    capacity by a recent acquisition - expires 2028	None	None		0.9		—
Trigger - Claim payments are not made
Credit support under letters of credit in lieu of security    deposits for one lease from acquisitions - expires after 2028	None	None		0.5		—
Trigger - Lease payments do not get made
Financial guarantees of loans to 5 Canadian-based    employees - expires when loan balances are reduced    to zero through May 2029 - Principal and interest    are paid quarterly	(1)	None		0.6		—
Trigger - Default on loan payments
Financial guarantee of external loan to subsidiary in    Chile - expires when loan balance is reduced to    zero through July 2024 - Principal and interest are    paid quarterly	None	None		1.8		—
Trigger - Default on loan payments
			$	23.6	$	13.7

(1)The guarantees are collateralized by shares in minority holdings of our Canadian operating companies.