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Discontinued Operations (Summary Of Income From Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended									12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Discontinued Operations and Disposal Groups [Abstract]
Revenues									$ 0.0	$ 0.0	$ 0.0
Operating expenses									3.1	2.0	1.5
Operating (loss) income before income taxes									(3.1)	(2.0)	(1.5)
Income tax benefit									(10.1)	7.1	(2.1)
Gain on disposal of discontinued operations, net									1.1	1.0	0.4
DISCONTINUED OPERATIONS, NET	$ 0.0	$ 0.0	$ (8.0)	$ (0.1)	$ 1.4	$ (0.2)	$ 0.4	$ (0.6)	$ 8.1	$ (8.1)	$ 1.0	$ 8.1

X

- Definition

Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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- Definition

Amount of tax expense (benefit) attributable to income (loss) from operations classified as a discontinued operation. Excludes tax expense (benefit) for gain (loss) on disposal and for provision for gain (loss) until disposal.

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