Business Acquisitions - Additional Information Mandatorily Redeemable Preferred Interests (Details) $ in Millions	Dec. 31, 2016 USD ($) JointVenture	Dec. 31, 2015 USD ($)
Redeemable Noncontrolling Interest [Line Items]
Other long-term liabilities	$ 215.1	$ 186.9
Mandatorily Redeemable Noncontrolling Interests [Member]
Redeemable Noncontrolling Interest [Line Items]
Other long-term liabilities	$ 109.3
Number of joint ventures | JointVenture	2