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Fair Value Measurements - Schedule of Fair Value, Assets and Liabilities Measured on a Recurring Basis (Details) - Recurring - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Equity securities	$ 81.2	$ 72.6
Redeemable noncontrolling interests	32.5	31.6
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Equity securities	4.0	0.0
Redeemable noncontrolling interests	0.0	0.0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Equity securities	77.2	72.6
Redeemable noncontrolling interests	0.0	0.0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring Basis [Abstract]
Equity securities	0.0	0.0
Redeemable noncontrolling interests	$ 32.5	$ 31.6

X

- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
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- References

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- Definition

The aggregate fair value as of the reporting date of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.

+ References

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-Topic 480
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