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Redeemable Noncontrolling Interests (Tables)
 12 Months Ended
Dec. 31, 2017
Temporary Equity Disclosure [Abstract]  
Redeemable Noncontrolling Interest [Table Text Block]
Reconciliation of changes in redeemable noncontrolling interests —
December 31, 2017
 
Twelve Months Ended
Balance, beginning of period
 
$
—

Initial fair value of redeemable noncontrolling interests of acquired businesses
 
44

Purchase of redeemable noncontrolling interest
 
(1
)
Comprehensive income (loss) adjustments:
 

Net income (loss) attributable to redeemable noncontrolling interests
 
(5
)
Other comprehensive income (loss) attributable to redeemable noncontrolling interests
 
3

Retained earnings adjustments:
 

Adjustment to redemption value
 
6

Balance, end of period
 
$
47