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Shareholders' Equity (Details) - USD ($) shares in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Apr. 26, 2021
Class of Stock [Line Items]
Dividends	$ 36,814,000	$ 32,447,000	$ 74,139,000	$ 65,056,000
Payments for repurchase of common stock			$ 353,703,000	$ 95,676,000
Increase in share repurchase authorization					$ 1,000,000,000.0
Share repurchase plan
Class of Stock [Line Items]
Share repurchases (shares)			6.9	2.8
Payments for repurchase of common stock			$ 353,700,000	$ 95,700,000
Remaining value of stock repurchase programs authorization	$ 1,000,000,000.0		1,000,000,000.0
Shares withheld to pay taxes
Class of Stock [Line Items]
Payments for repurchase of common stock			$ 10,600,000	$ 14,900,000

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