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Contingencies - Summary of Insurance Receivable Balances and Activity Related to Cumulative Trauma Product Liability Losses (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Movement in Loss Contingency Receivable, Increase (Decrease) [Roll Forward]    
Balance beginning of period $ 134.7 $ 159.9
Additions 0.5 94.6
Collections and settlements converted to notes receivable (3.8) $ (119.8)
Balance end of period $ 131.4