Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets
Net operating loss and other tax attribute carryforwards	$ 242.0	$ 74.3
Accrued expenses	125.4	13.2
Pension and other retirement obligations	70.3	0.0
Other	65.2	13.4
Total deferred tax asset	502.9	100.9
Valuation allowance	(67.6)	(7.1)
Total deferred tax asset, net	435.3	93.8
Deferred tax liabilities
Intangible assets	(655.0)	(110.5)
Property & equipment	(541.7)	(41.9)
Other	(58.3)	(6.7)
Total deferred tax liability	(1,255.0)	(159.1)
Net deferred tax liability	$ (819.7)	$ (65.3)