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Note 13 - Income Taxes - Domestic and Foreign Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
U.S.	$ 834.0	$ 553.9	$ 700.2
Foreign	63.5	14.5	19.5
Total income before income taxes	$ 897.5	$ 568.4	$ 719.7

X

- Definition

The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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