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Redeemable Noncontrolling Interests (Tables) | 3 Months Ended
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Mar. 31, 2018
Noncontrolling Interest [Abstract] |
Redeemable Noncontrolling Interest | The following is a summary of the activity related to our Redeemable noncontrolling interests during the three months ended March 31, 2018 and 2017 (in millions):
| Three Months Ended March 31,
| 2018 |  | 2017
Balance at beginning of period | $ | 220.9 |  |  | $ | 138.3 |
Net income attributable to noncontrolling interests | 2.8 |  |  | 3.1 |
Distributions declared | (2.2 | ) |  | (1.9 | )
Purchase of redeemable noncontrolling interests | (65.1 | ) |  | — |
Change in fair value | 42.2 |  |  | 13.9 |
Balance at end of period | $ | 198.6 |  |  | $ | 153.4 |
Reconciliation of Noncontrolling Interests | The following table reconciles the net income attributable to nonredeemable Noncontrolling interests, as recorded in the shareholders’ equity section of the condensed consolidated balance sheets, and the net income attributable to Redeemable noncontrolling interests, as recorded in the mezzanine section of the condensed consolidated balance sheets, to the Net income attributable to noncontrolling interests presented in the condensed consolidated statements of operations for the three months ended March 31, 2018 and 2017 (in millions):
| Three Months Ended March 31,
| 2018 |  | 2017
Net income attributable to nonredeemable noncontrolling interests | $ | 18.6 |  |  | $ | 14.5 |
Net income attributable to redeemable noncontrolling interests | 2.8 |  |  | 3.1 |
Net income attributable to noncontrolling interests | $ | 21.4 |  |  | $ | 17.6 |

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- Definition Reconciliation of Net Income Attributable to Noncontrolling Interests [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of redeemable noncontrolling interest (as defined) included in the statement of financial position as either a liability or temporary equity. As of the date of the statement of financial position, such redeemable noncontrolling interest is currently redeemable, as defined, for cash or other assets of the entity at (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 entity. + References No definition available. + Details
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