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Stock Repurchase (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Oct. 25, 2021	Jan. 26, 2021	Dec. 31, 2020
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount					$ 900,000,000	$ 750,000,000
Shares repurchased during period (in shares)		9,804,958	0
Shares repurchased, average price (in usd per share)		$ 12.38
Total value of shares repurchased	$ 80,879,000	$ 121,557,000
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount				$ 1,900,000,000
Amount available under the current stock repurchase program				$ 1,123,738,000

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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