Income Taxes - Cash Tax Distributions (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Cash Tax Distributions
Cash tax distributions	$ 0.0	$ 0.0	$ 1.7	$ 20.0
Cash tax distributions, JEH to the Company			1.1	9.9
Cash tax distributions, JEH to Class B shareholders			$ 0.6	$ 10.1

Represents amount of cash outflow for distribution to members or limited partners of limited liability company (LLC) or limited partnership (LP), subject to reserves to be maintained as defined in operating or partnership agreement, or in a credit facility agreement.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration