Restatement of Previously Reported Consolidated Annual Financial Statements - Impact Of The Restatement (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income (loss) from continuing operations, net of tax, attributable to parent	$ (148.0)	$ (393.0)	$ (497.0)	$ (331.0)	$ (87.0)	$ 211.0	$ (339.0)	$ (328.0)	$ (828.0)		$ (1,221.0)		$ (1,369.0)	$ (543.0)	$ (1,311.0)
Continuing operations (in dollars per share)	$ (0.58)	$ (1.52)	$ (1.92)	$ (1.28)	$ (0.33)	$ 0.79	$ (1.25)	$ (1.22)	$ (3.19)		$ (4.72)		$ (5.31)	$ (2.04)	$ (4.79)
Other charges	$ 25.0	$ 13.0	$ 12.0	$ 14.0	$ 117.0	$ 12.0	$ 29.0	$ 17.0	$ 26.0		$ 39.0		$ 64.0	$ 175.0	$ 90.0
Income (loss) from continuing operations before income taxes, noncontrolling interest	377.0	523.0	659.0	446.0	131.0	(426.0)	630.0	444.0	1,105.0	$ 1,074.0	1,628.0	$ 648.0	2,005.0	779.0	1,745.0
Environmental remediation charge													0.0	82.0	0.0
Discontinued operations (in dollars per share)	3.0	217.0	(1.0)	$ 6.0	$ 253.0	$ 27.0	$ 31.0	$ 19.0	5.0		222.0		225.0	330.0	$ 95.0
Earned payout if the target performance is achieved				150.00%	100.00%	150.00%
Share-based compensation expense		9.0				$ 11.0					26.0	$ 37.0
Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income (loss) from continuing operations, net of tax, attributable to parent	$ (1.0)	$ (1.0)	$ 7.0	$ (3.0)	$ 4.0				$ 4.0		$ 3.0		$ 2.0	$ 4.0
Continuing operations (in dollars per share)	$ (0.00)	$ (0.00)	$ 0.03	$ (0.01)	$ 0.01				$ 0.02		$ 0.01		$ 0.01	$ 0.01
Other charges				$ 0.0					$ 0.0		$ 0.0		$ 0.0
Income (loss) from continuing operations before income taxes, noncontrolling interest	$ 1.0	$ 2.0	$ (12.0)	6.0	$ (7.0)				(6.0)		(4.0)		(3.0)	$ (7.0)
Environmental remediation charge				0.5									0.5
Prior period reclassification adjustment, discontinued operations to continuing operations	4.7		2.5
Discontinued operations (in dollars per share)	$ 3.0	$ 0.0	$ 2.0	0.0	0.0				$ 2.0		$ 2.0		5.0	0.0
Restructuring reserve, accrual adjustment					3.4									3.4
Share-based compensation expense				6.8	(6.8)
Share-based Compensation | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income (loss) from continuing operations before income taxes, noncontrolling interest				(6.8)	$ (6.8)									$ (6.8)
Other Expense
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Environmental remediation charge				0.5									0.5
Under Reported Customer Rebates | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income (loss) from continuing operations before income taxes, noncontrolling interest													1.8
Incorrect Share Based Compensation Payout Assumptions | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income (loss) from continuing operations before income taxes, noncontrolling interest				$ (6.8)
Glass Segment | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Income (loss) from continuing operations before income taxes, noncontrolling interest													7.2
Discontinued operations (in dollars per share)													$ 4.5