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Redeemable Noncontrolling Interest
 3 Months Ended
Mar. 31, 2017
Noncontrolling Interest [Abstract]  
Redeemable Noncontrolling Interest
Redeemable Noncontrolling Interest
 
One of the Company's noncontrolling interests is redeemable at the option of the holder and is presented outside of equity and carried at its estimated redemption value.

The following table presents a summary of the redeemable noncontrolling interest activity during the periods presented:
(in millions)
 
2017
 
2016
Balance as of January 1,
 
$
73

 
$
77

Distributions
 
(8
)
 
(8
)
Share of income
 
8

 
8

Adjustment to redemption value of redeemable noncontrolling interest
 
(1
)
 
(4
)
Balance as of March 31,
 
$
72

 
$
73