Commitments, Contingencies and Off-Balance Sheet Arrangements - Contractual Obligations (Detail) $ in Millions	Dec. 31, 2023 USD ($)
Senior Notes [Member]
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]
Contractual Obligations, Payments Due by Period, Thereafter	$ 3,550.0
Contractual Obligations, Payments Due by Period, Total	3,550.0
Note Purchase Agreements [Member]
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]
Contractual Obligations, Payments Due by Period, 2023	425.0
Contractual Obligations, Payments Due by Period, 2024	200.0
Contractual Obligations, Payments Due by Period, 2025	640.0
Contractual Obligations, Payments Due by Period, 2026	478.0
Contractual Obligations, Payments Due by Period, 2027	200.0
Contractual Obligations, Payments Due by Period, Thereafter	2,005.0
Contractual Obligations, Payments Due by Period, Total	3,948.0
Credit Agreement [Member]
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]
Contractual Obligations, Payments Due by Period, 2023	245.0
Contractual Obligations, Payments Due by Period, Total	245.0
Premium Financing Debt Facility [Member]
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]
Contractual Obligations, Payments Due by Period, 2023	289.0
Contractual Obligations, Payments Due by Period, Total	289.0
Interest On Debt [Member]
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]
Contractual Obligations, Payments Due by Period, 2023	311.9
Contractual Obligations, Payments Due by Period, 2024	317.9
Contractual Obligations, Payments Due by Period, 2025	299.1
Contractual Obligations, Payments Due by Period, 2026	280.6
Contractual Obligations, Payments Due by Period, 2027	261.3
Contractual Obligations, Payments Due by Period, Thereafter	3,374.8
Contractual Obligations, Payments Due by Period, Total	4,845.6
Total Debt Obligations [Member]
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]
Contractual Obligations, Payments Due by Period, 2023	1,270.9
Contractual Obligations, Payments Due by Period, 2024	517.9
Contractual Obligations, Payments Due by Period, 2025	939.1
Contractual Obligations, Payments Due by Period, 2026	758.6
Contractual Obligations, Payments Due by Period, 2027	461.3
Contractual Obligations, Payments Due by Period, Thereafter	8,929.8
Contractual Obligations, Payments Due by Period, Total	12,877.6
Operating Lease Obligations [Member]
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]
Contractual Obligations, Payments Due by Period, 2023	108.9
Contractual Obligations, Payments Due by Period, 2024	100.4
Contractual Obligations, Payments Due by Period, 2025	84.0
Contractual Obligations, Payments Due by Period, 2026	67.6
Contractual Obligations, Payments Due by Period, 2027	50.6
Contractual Obligations, Payments Due by Period, Thereafter	81.8
Contractual Obligations, Payments Due by Period, Total	493.3
Less Sublease Arrangements [Member]
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]
Contractual Obligations, Payments Receivable by Period, 2023	(2.4)
Contractual Obligations, Payments Receivable by Period, 2024	(1.8)
Contractual Obligations, Payments Receivable by Period, 2025	(1.7)
Contractual Obligations, Payments Receivable by Period, 2026	(1.6)
Contractual Obligations, Payments Receivable by Period, 2027	(1.1)
Contractual Obligations, Payments Receivable by Period, Thereafter	(0.8)
Contractual Obligations, Payments Receivable by Period, Total	(9.4)
Outstanding Purchase Obligations [Member]
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]
Contractual Obligations, Payments Due by Period, 2023	116.5
Contractual Obligations, Payments Due by Period, 2024	59.0
Contractual Obligations, Payments Due by Period, 2025	24.9
Contractual Obligations, Payments Due by Period, 2026	20.2
Contractual Obligations, Payments Due by Period, 2027	15.0
Contractual Obligations, Payments Due by Period, Thereafter	47.1
Contractual Obligations, Payments Due by Period, Total	282.7
Total Contractual Obligations [Member]
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]
Contractual Obligations, Payments Due by Period, 2023	1,493.9
Contractual Obligations, Payments Due by Period, 2024	675.5
Contractual Obligations, Payments Due by Period, 2025	1,046.3
Contractual Obligations, Payments Due by Period, 2026	844.8
Contractual Obligations, Payments Due by Period, 2027	525.8
Contractual Obligations, Payments Due by Period, Thereafter	9,057.9
Contractual Obligations, Payments Due by Period, Total	$ 13,644.2

Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]

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Recorded unconditional purchase obligation receivable.

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Recorded unconditional purchase obligation receivable after fifth year.

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Recorded unconditional purchase obligation receivable in fifth year.

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Recorded unconditional purchase obligation receivable in fourth year.

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Recorded unconditional purchase obligation receivable in second year.

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Recorded unconditional purchase obligation receivable in third year.

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Recorded unconditional purchase obligation receivable within one year.

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- Definition

Amount of the recorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 440
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482648/440-10-50-6

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Amount of recorded unconditional purchase obligation maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 440
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482648/440-10-50-6

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Amount of recorded unconditional purchase obligation to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of recorded unconditional purchase obligation to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of recorded unconditional purchase obligation to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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- Definition

Amount of recorded unconditional purchase obligation to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of recorded unconditional purchase obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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