COMBINED AND CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Allowance for doubtful accounts	$ 8.0	$ 1.2
Preferred stock par value per share	$ 0.01	$ 0
Preferred stock shares authorized	20,000,000us-gaap_PreferredStockSharesAuthorized	0us-gaap_PreferredStockSharesAuthorized
Preferred stock shares issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Preferred stock shares outstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Common Class A
Common stock par value per share	$ 0.01	$ 0
Common stock shares authorized	120,000,000	0
Common stock shares issued	3,000,000	0
Common stock shares outstanding	3,000,000	0
Common Class B
Common stock par value per share	$ 0.01	$ 0
Common stock shares authorized	60,000,000	0
Common stock shares issued	10,750,000	0
Common stock shares outstanding	10,750,000	0

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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