Discontinued Operations Discontinued Operations (Cash Flows Table) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net cash provided from discontinued operations (Note 19)	$ 157.0	$ 23.6	$ 248.4
Net cash provided from (used for) investing activities — discontinued operations (Note 19)	3.0	241.4	(100.5)
Net cash used for financing activities — discontinued operations (Note 19)	(61.9)	(93.8)	(100.7)
Effect of exchange rate changes on cash	0.0	0.0	(4.5)
Net cash provided from operations	98.1	171.2	42.7
Cash balance at beginning of year	80.2	72.0	145.7
Net change in cash during the period - continuing operations	16.0	7.9	(74.8)
Cash balance at end of year	97.1	80.2	72.0
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash balance at beginning of year	70.5	245.4	203.8
Net change in cash during the period - continuing operations	(0.9)	(0.3)	(1.1)
Cash sold as part of sale of consolidated subsidiaries	(167.7)	(345.8)	0.0
Cash balance at end of year	$ 0.0	$ 70.5	$ 245.4