Other Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
(Losses) gains on sales of businesses and investments																	$ (39.7)	$ (49.6)	$ 0.8
Loss on early extinguishment of debt																	0.0	0.0	(10.4)
Other income, net																	2.4	2.9
Other expense, net																			(0.6)
Total other expense, net	$ 26.2		$ (6.1)		$ 0.1		$ 17.1		$ 10.3		$ 37.2		$ (0.5)		$ (0.3)		$ (37.3)	$ (46.7)	$ (10.2)

[1] The three months ended March 31 and December 31, 2016 included pre-tax losses of $16.3 and $25.3, respectively, on sales of businesses. The three months ended September 30 and December 31, 2015 included pre-tax losses of $38.0 and $12.0, respectively, on sales of businesses.