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Redeemable Noncontrolling Interest (Tables)
6 Months Ended
Jun. 30, 2020
Temporary Equity Disclosure [Abstract]  
Summary of Redeemable Noncontrolling Interest
At June 30, 2020, the redeemable noncontrolling interest was determined as follows:

In millions
Balance at December 31, 2019$304.3  
Net Loss Attributable to Redeemable Noncontrolling Interest(5.2) 
Other Comprehensive Income, Net of Tax8.6  
Redemption of IP's Ownership Interest(250.0) 
Redeemable Noncontrolling Interest Redemption Value Adjustment(12.7) 
Distributions of Membership Interest(1.2) 
Balance at June 30, 2020$43.8