Note 21 - Other Comprehensive (Loss) Income (Details) - Changes in Other Comprehensive (Loss) Income, by Component - USD ($) $ in Millions		4 Months Ended	8 Months Ended	12 Months Ended
		Dec. 31, 2013	Aug. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Successor [Member]
Note 21 - Other Comprehensive (Loss) Income (Details) - Changes in Other Comprehensive (Loss) Income, by Component [Line Items]
Currency translation adjustments		$ 1		$ (35)	$ (33)
Reclassification adjustment for losses included in Other charges (net), before tax				2
Reclassification adjustment for losses included in Other charges (net), net of tax				2
Pension and other postretirement benefit plan changes
Newly established prior service credit		6		4	61
Newly established net actuarial (loss) gain		95		(88)	(278)
Tax (benefit) provision		(3)		(5)	7
Newly established prior service credit and net actuarial (loss) gain, net of tax		$ 98		(89)	(210)
Reclassification adjustments:
Amortization of prior service credit (a)	[1]			(8)	(3)
Amortization of actuarial (gains) losses (a)	[1]			(2)	1
Recognition of losses due to settlements and curtailments (a)	[1]			1	10
Total reclassification adjustments				(9)	8
Reclassification adjustments, net of tax				(9)	8
Pension and other postretirement benefit plan changes, net of tax		$ 98		(98)	(202)
Other comprehensive (loss) income		$ 99		$ (131)	$ (235)
Predecessor [Member]
Note 21 - Other Comprehensive (Loss) Income (Details) - Changes in Other Comprehensive (Loss) Income, by Component [Line Items]
Currency translation adjustments			$ 4
Pension and other postretirement benefit plan changes
Newly established net actuarial (loss) gain			393
Tax (benefit) provision			(14)
Newly established prior service credit and net actuarial (loss) gain, net of tax			379
Reclassification adjustments:
Amortization of prior service credit (a)	[1]		(75)
Amortization of actuarial (gains) losses (a)	[1]		185
Recognition of losses due to settlements and curtailments (a)	[1]		1,563
Total reclassification adjustments			1,673
Tax (provision)			(448)
Reclassification adjustments, net of tax			1,225
Pension and other postretirement benefit plan changes, net of tax			1,604
Other comprehensive (loss) income			$ 1,608

[1] Reclassified to Pension (income) expense - refer to Note 16, "Retirement Plans" and Note 17, "Other Postretirement Benefits" for additional information.