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Redeemable Noncontrolling Interests - Reconciliation of Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Noncontrolling Interest [Abstract]
Net income attributable to nonredeemable noncontrolling interests	$ 18.2	$ 16.9	$ 54.4	$ 53.2
Net income attributable to redeemable noncontrolling interests	3.7	3.8	10.1	10.3
Net income attributable to noncontrolling interests	$ 21.9	$ 20.7	$ 64.5	$ 63.5

X

- Definition

Amount of Net Income (Loss) attributable to noncontrolling interest.

+ References

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- Definition

Portion of net income (loss) attributable to nonredeemable noncontrolling interest.

+ References

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Amount of Net Income (Loss) attributable to redeemable noncontrolling interest.

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