Organization, Description of Business and Basis of Presentation - Additional Information (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2017 USD ($) segment	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of reportable segments (in segments) | segment	2
Share-based compensation, excess tax benefit	$ 10.7
Total minimum lease payments			$ 2,144.3
Reclassification of net periodic benefit cost	(3,425.9)	$ (3,483.3)
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Release of reserves related to uncertain tax positions	2.6
Pro Forma | Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of net periodic benefit cost			$ 25.0
State and Local Jurisdiction | Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Release of valuation allowance	$ 3.3