Consolidated Statements of Changes in Total Equity - USD ($) shares in Thousands, $ in Millions	Total	Total GCC Equity [Member]	Common Stock [Member]	Add'l Paid in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2013	$ 1,379.8	$ 1,280.2	$ 0.6	$ 699.6	$ (155.3)	$ 847.4	$ (112.1)	$ 99.6
Beginning Balance, shares at Dec. 31, 2013			49,598
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(773.6)	(778.9)				(627.6)	(151.3)	5.3
Common stock dividend	(35.4)	(35.4)				(35.4)
Sale of subsidiaries - noncontrolling interest	(31.5)							(31.5)
Stock option and RSU expense	14.5	14.5		14.5
Exercise of stock options	0.3	0.3		(0.1)	0.4
Exercise of stock options, shares			20
Treasury shares related to nonvested stock vesting	(1.8)	(1.8)			(1.8)
Treasury shares related to nonvested stock vesting, shares			(63)
Amortization of nonvested shares	0.2	0.2		0.2
Excess tax benefits (deficiencies) from stock-based compensation	(0.5)	(0.5)		(0.5)
Purchase of noncontrolling interest	(0.7)	(1.9)		(1.9)				1.2
Dividends paid to noncontrolling interest	(6.2)							(6.2)
Repurchase of common shares	(30.7)	(30.7)			(30.7)
Repurchase of common shares, shares			(1,000)
Other	(1.2)	6.1		3.0	3.1			(7.3)
Other, shares			128
Ending Balance at Dec. 31, 2014	513.2	452.1	$ 0.6	714.8	(184.3)	184.4	(263.4)	61.1
Ending Balance, shares at Dec. 31, 2014			48,683
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(220.9)	(198.7)				(121.9)	(76.8)	(22.2)
Common stock dividend	(35.3)	(35.3)				(35.3)
Sale of subsidiaries - noncontrolling interest	(21.5)							(21.5)
Stock option and RSU expense	7.5	7.5		7.5
Exercise of stock options	0.2	0.2		(0.1)	0.3
Exercise of stock options, shares			18
Treasury shares related to nonvested stock vesting	(0.7)	(0.7)			(0.7)
Treasury shares related to nonvested stock vesting, shares			(56)
Excess tax benefits (deficiencies) from stock-based compensation	(1.7)	(1.7)		(1.7)
Dividends paid to noncontrolling interest	(2.5)							(2.5)
Other	4.6	4.6			4.6
Other, shares			263
Ending Balance at Dec. 31, 2015	242.9	228.0	$ 0.6	720.5	(180.1)	27.2	(340.2)	14.9
Ending Balance, shares at Dec. 31, 2015			48,908
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(39.0)	(40.0)				(93.8)	53.8	1.0
Common stock dividend	(35.6)	(35.6)				(35.6)
Stock option and RSU expense	5.4	5.4		5.4
Exercise of stock options	1.2	1.2		0.1	1.1
Exercise of stock options, shares			60
Excess tax benefits (deficiencies) from stock-based compensation	(5.0)	(5.0)		(5.0)
Dividends paid to noncontrolling interest	(0.1)	0.0						(0.1)
Other	(0.9)	(0.9)		(10.0)	9.1
Other, shares			423
Ending Balance at Dec. 31, 2016	$ 168.9	$ 153.1	$ 0.6	$ 711.0	$ (169.9)	$ (102.2)	$ (286.4)	$ 15.8
Ending Balance, shares at Dec. 31, 2016			49,391