Borrowings - Narrative (Details)							12 Months Ended
	Jun. 16, 2021 USD ($)	May 28, 2021 USD ($)	May 17, 2021 USD ($)	May 27, 2020 USD ($)	Apr. 29, 2020 USD ($)	Jun. 23, 2015 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	May 31, 2019 USD ($)	Jun. 13, 2016 USD ($)
Line of Credit Facility [Line Items]
Less unaccreted debt discount							$ 1,400,000	$ 900,000
Interest							36,000,000.0	35,200,000	$ 36,700,000
Credit facility, term						5 years
Balance outstanding							$ 1,200,100,000	1,050,200,000
For 12 Months in Connection with Certain Acquisitions
Line of Credit Facility [Line Items]
Leverage ratio							4.00
Line of Credit
Line of Credit Facility [Line Items]
Current borrowing capacity						$ 700,000,000
Revolving facility, extension term						1 year
Revolving Credit Facility
Line of Credit Facility [Line Items]
Current borrowing capacity										$ 800,000,000
Aggregate lending commitments										$ 400,000,000
Minimum
Line of Credit Facility [Line Items]
Required percent for prepayment amount of aggregate principal amount											5.00%
Minimum | Revolving Credit Facility
Line of Credit Facility [Line Items]
Applicable leverage ratio							0.00%
Maximum | Revolving Credit Facility
Line of Credit Facility [Line Items]
Applicable leverage ratio							1.275%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Balance outstanding							$ 0
Outstanding letters of credit							7,200,000
Revolving facility, amount available to borrow							$ 792,800,000
Revolving Credit Facility | Minimum
Line of Credit Facility [Line Items]
Interest coverage ratio							3.0
Revolving Credit Facility | Maximum
Line of Credit Facility [Line Items]
Leverage ratio							3.50
Senior Notes | Maximum
Line of Credit Facility [Line Items]
Limitation of outstanding principal of higher preference debt as percent of consolidated assets											15.00%
Senior Notes | 4.20% Senior Notes, repaid in June 2021
Line of Credit Facility [Line Items]
Stated interest rate							4.20%
Extinguishment of debt		$ 350,000,000	$ 350,000,000
Redemption premium		6,700,000	6,700,000
Amount to be recognized from hedged transactions within 12 months, approximate	$ 1,300,000
Write off of deferred debt issuance cost			100,000
Write off of deferred debt remaining discount			100,000
Write-off deferred taxes			$ 400,000
Gain (loss) on extinguishment of debt							$ 8,600,000
Balance outstanding							$ 0	350,000,000.0
Senior Notes | 3.00% Senior Notes, due May 2030
Line of Credit Facility [Line Items]
Stated interest rate							3.00%
Proceeds from debt					$ 494,400,000
Less unaccreted debt discount					900,000
Underwriting commission					(3,300,000)
Offering expenses					$ (1,400,000)
Redemption price, percentage					101.00%
Balance outstanding					$ 500,000,000		$ 500,000,000.0	500,000,000.0
Senior Notes | 3.00% Senior Notes, due May 2030 | Minimum
Line of Credit Facility [Line Items]
Percent of outstanding amount owned for decision making					25.00%
Senior Notes | 2.625% Senior Notes, due 2031
Line of Credit Facility [Line Items]
Stated interest rate							2.625%
Debt instrument face amount		500,000,000.0
Proceeds from debt		494,700,000
Less unaccreted debt discount		600,000
Underwriting commission		3,300,000
Offering expenses		$ 1,400,000
Redemption price, percentage			101.00%
Senior Notes | 2.625% Senior Notes, due 2031 | Minimum
Line of Credit Facility [Line Items]
Percent of notes held							25.00%
Senior Notes | 3.20% Senior Notes, due June 2023
Line of Credit Facility [Line Items]
Stated interest rate							3.20%				3.20%
Debt instrument face amount											$ 100,000,000
Balance outstanding							$ 100,000,000.0	100,000,000.0
Senior Notes | 3.37% Senior Notes, due June 2025
Line of Credit Facility [Line Items]
Stated interest rate							3.37%				3.37%
Debt instrument face amount											$ 100,000,000
Balance outstanding							$ 100,000,000.0	100,000,000.0
Senior Notes | 4.50% Senior Notes, due December 2020
Line of Credit Facility [Line Items]
Stated interest rate							4.50%
Extinguishment of debt				$ 300,000,000	$ 300,000,000
Redemption premium				6,800,000
Amount to be recognized from hedged transactions within 12 months, approximate				1,400,000
Write off of deferred debt issuance cost				100,000
Write off of deferred debt remaining discount				100,000
Gain (loss) on extinguishment of debt								$ 8,400,000
Interest				$ 6,100,000
Letters of Credit | Line of Credit
Line of Credit Facility [Line Items]
Current borrowing capacity						$ 75,000,000
Swing line Loans | Line of Credit
Line of Credit Facility [Line Items]
Current borrowing capacity						$ 50,000,000