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Stockholders' Equity Parenthetical (Parentheticals)
$ in Millions
9 Months Ended
Dec. 31, 2017
USD ($)
Successor  
Net change in unrealized (losses) gains on available-for-sale securities, tax (benefit) provision $ 0.0
Net unrealized gains (losses) on cash flow hedges, tax benefit 0.0
Postretirement plans and workers' compensation obligations, tax (benefit) provision $ 0.0