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Comprehensive Income Parenthetical (Parentheticals) - USD ($) $ in Millions		3 Months Ended						12 Months Ended
	Apr. 01, 2017	Apr. 01, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net change in unrealized (losses) gains on available-for-sale securities, tax (benefit) provision		$ 0.0							$ (0.1)	$ (0.5)
Net unrealized gains (losses) on cash flow hedges, tax benefit								$ 0.0	85.9	72.2
Postretirement plans and workers' compensation obligations, tax (benefit) provision		0.0							(1.5)	36.2
Predecessor
Income (loss) from continuing operations, net of tax, including portion attributable to noncontrolling interest	$ (319.8)	(195.5)	$ 124.3	$ (175.2)	$ (97.7)	$ (223.2)	$ (167.7)		(663.8)	(1,783.2)
Net change in unrealized (losses) gains on available-for-sale securities, tax (benefit) provision		0.0							0.0	(0.1)
Net unrealized gains (losses) on cash flow hedges, tax benefit		9.1							85.9	72.2
Postretirement plans and workers' compensation obligations, tax (benefit) provision		2.5							(1.5)	36.2
Net income (loss)	(331.9)	(211.7)	120.2	(188.3)	(135.8)	(226.2)	(171.1)		(721.4)	(1,958.2)
Net Income (Loss) Attributable to Parent	$ (331.9)	$ (216.5)	$ 115.4	$ (192.7)	$ (137.6)	$ (227.9)	$ (171.1)		$ (729.3)	$ (1,965.3)
Income (Loss) from Continuing Operations, Per Basic and Diluted Share		$ (10.93)							$ (36.72)	$ (98.65)

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- Definition

Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.

+ References

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The amount of net income (loss) from continuing operations per each basic and diluted share of common stock or unit when the per share amount is the same for both basic and diluted shares.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount of tax expense (benefit), after reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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