Discontinued Operations - Net Change Cash From Discontinued Operations (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Net Cash Provided by (Used in) Discontinued Operations [Abstract]
Cash balances at beginning of period	$ 80.2	$ 72.0
Cash balances at end of period	48.6	111.2
Net income tax payment to national governments	0.0	0.0
Discontinued Operations
Net Cash Provided by (Used in) Discontinued Operations [Abstract]
Net cash provided from operations - discontinued operations	157.0	38.1
Net cash provided from investing activities - discontinued operations	3.0	269.7
Net cash used for financing activities - discontinued operations	(61.9)	(72.7)
Net change in cash during the period	98.1	235.1
Cash balances at beginning of period	70.5	245.4
Cash balances at end of period	0.0	137.3
Interest paid	0.0	(7.7)
Net income tax payment to national governments	0.0	(18.3)
Discontinued Operations, Held-for-sale
Net Cash Provided by (Used in) Discontinued Operations [Abstract]
Cash balances at beginning of period	70.5	245.4
Cash balances at end of period	0.0	137.3
Disposal Group, Held-for-sale, Not Discontinued Operations
Net Cash Provided by (Used in) Discontinued Operations [Abstract]
Net change in cash held for sale	(0.9)	2.6
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations
Net Cash Provided by (Used in) Discontinued Operations [Abstract]
Cash sold as part of sale of consolidated subsidiaries	$ 167.7	$ 345.8