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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Share-Based Compensation Expense

			Year Ended December 31,
(in millions)			2023			2022			2021
Restricted stock unit awards			$	65.9		48.5			37.7
Performance stock unit awards			9.0			26.8			42.4
Total			$	74.9		75.3			80.1

Restricted Stock Unit Activity

			RSU Shares (in 000's)			PSU Shares (in 000's)						Total Shares (in 000's)						Weighted Average Grant Date Fair Value			Weighted Average Remaining Contractual Life (in years)
Unvested as of December 31, 2020			1,096.2			531.5						1,627.7						$	137.42		1.69
Granted			335.7			218.9						554.6						189.40
Vested			(471.1)			(79.0)						(550.1)						145.54
Forfeited			(48.4)			(25.4)						(73.8)						148.97
Unvested as of December 31, 2021			912.4			646.0						1,558.4						152.27			1.99
Granted			353.2			116.5						469.7						204.05
Vested			(395.7)			(175.1)						(570.8)						147.78
Forfeited			(28.6)			(20.4)						(49.0)						168.92
Unvested as of December 31, 2022			841.3			567.0						1,408.3						170.78			1.79
Granted			520.5			185.2						705.7						143.64
Vested			(296.8)			(257.2)						(554.0)						126.28
Forfeited			(74.9)			(36.9)						(111.8)						164.42
Unvested as of December 31, 2023			990.1			458.1						1,448.2						$	175.07		1.66

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- Definition

Schedule of Share-based Compensation, Restricted and Performance Stock Units Award Activity [Table Text Block]

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No definition available.

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- Definition

Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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