Income Tax Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Non-current deferred tax assets:
Compensation related obligations	$ 22.2	$ 19.3
Pension and postretirement benefits	35.6	61.2
Tax credit carryforwards	13.0	1.5
Tax loss carryforwards	1,004.8	897.9
Accrued liabilities and other	46.1	32.3
Other	7.5	10.0
Valuation allowance	(901.7)	(824.9)
Total non-current deferred tax assets	227.5	197.3
Non-current deferred tax liabilities:
Fixed assets	72.5	69.7
Partnership investments	922.0	169.7
Foreign exchange gain/loss	43.0	48.7
Intangible assets	800.5	644.0
Other	13.8	13.9
Total non-current deferred tax liabilities	1,851.8	946.0
Deferred Tax Assets, Net, Noncurrent	0.0	0.0
Net non-current deferred tax liabilities	$ 1,624.3	$ 748.7