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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

Share-Based Compensation Expense

Stock-based compensation expense by award type is presented below.

			Year Ended December 31,
(in millions)			2022			2021			2020
Restricted stock unit awards			$	48.5		37.7			41.8
Performance stock unit awards			26.8			42.4			5.5
SAYE			—			—			0.2
Total			$	75.3		80.1			47.5

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, 2019			1,532.3			286.8						1,819.1						$	141.51		2.39
Granted			173.1			276.4						449.5						124.98
Vested			(571.1)			—						(571.1)						137.99
Forfeited			(38.1)			(31.7)						(69.8)						136.00
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

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- Definition

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

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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