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Redeemable Noncontrolling Interest - Reconciliation of Changes in Redeemable Noncontrolling Interest (Details)
3 Months Ended
Mar. 31, 2017
USD ($)
Increase (Decrease) in Temporary Equity [Roll Forward]  
Balance, beginning of period $ 0
Initial fair value of redeemable noncontrolling interest of acquired business 45,000,000
Other comprehensive income (loss) attributable to redeemable noncontrolling interest (1,000,000)
Adjustment to redemption value 0
Balance, end of period $ 44,000,000