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Shareholders' Equity (Common Stock Issued With The Exercise Of Stock Options) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Stockholders' Equity Note [Abstract]
Shares issued (in shares)	0.2	0.0	0.6	0.1
Proceeds from the exercise of stock options	$ 7.7	$ 0.0	$ 28.9	$ 1.0
Average exercise price per share (in dollars per share)	$ 51.10	$ 0	$ 50.71	$ 18.12

X

- Definition

Amount of cash inflow from exercise of option under share-based payment arrangement.

+ References

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X

- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

No definition available.

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- Definition

Number of share options (or share units) exercised during the current period.

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