Note 17 - Other Postretirement Benefits (Details) - Changes in Benefit Obligations Recognized in Other Comprehensive (Loss) (USD $) In Millions, unless otherwise specified	4 Months Ended	12 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Aug. 31, 2013	Dec. 31, 2012
Successor [Member] | Other Postretirement Benefit Plans [Member]
Note 17 - Other Postretirement Benefits (Details) - Changes in Benefit Obligations Recognized in Other Comprehensive (Loss) [Line Items]
Newly established (loss) gain	$ 2	$ (2)
Amortization of:
Total income (loss) recognized in Other comprehensive income (loss) before fresh start accounting	2	(2)
Predecessor [Member] | Other Postretirement Benefit Plans [Member]
Note 17 - Other Postretirement Benefits (Details) - Changes in Benefit Obligations Recognized in Other Comprehensive (Loss) [Line Items]
Newly established (loss) gain			49
Amortization of:
Prior service credit			(77)
Net actuarial loss			4
Prior service credit recognized due to curtailment			(5)
Total income (loss) recognized in Other comprehensive income (loss) before fresh start accounting			(29)
Effect of application of fresh start accounting			(1,031)
Predecessor [Member]
Amortization of:
Prior service credit recognized due to curtailment				$ 9