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Stock-Based Compensation (Narratives) (Details) - USD ($) shares in Thousands, $ in Millions		12 Months Ended
	Jul. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense, accelerated vesting				$ 9.6
Purchase price of common stock, percent of market value, not less than (as a percent)		100.00%
Stock based compensation expense		$ 136.1	$ 117.0	101.2
Nonvested options granted, unrecognized compensation expense		$ 56.5
Nonvested options granted, period for recognition (in years)		1 year 8 months 12 days
Options exercised, total intrinsic value		$ 138.2	155.4	$ 109.4
Proceeds from stock options exercised		$ 104.7	$ 105.5
Nonvested shares granted (in shares)		228	285
Nonvested awards other than options granted, unrecognized compensation expense		$ 83.0
Nonvested awards other than options granted, weighted average period for recognition (in years)		1 year 7 months 6 days
Stock issued during period under employee stock purchase plan (in shares)		40	31	21
Proceeds from issuance of shares under employee stock purchase plan		$ 15.1	$ 10.5	$ 6.8
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum designated percent of eligible earnings per employee (as a percent)	10.00%
Discount percent (as a percent)	10.00%
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period (in years)		10 years
Stock based compensation expense		$ 45.0	38.6	29.9
Stock options | Weighted Average
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)		3 years
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 91.1	$ 77.5	$ 71.2
Restricted stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)		1 year
Restricted stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)		4 years
Incentive Plan 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares)		9,275

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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