Note 8 - Equity (Details) - Other Comprehensive Income (Loss) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
As of beginning of period				$ (206)
OCI, before reclassifications		$ 25		27	$ 4
Amounts reclassified from accumulated OCI		4	$ (1)	4	(5)
Net current-period other comprehensive income (loss)		29	(1)	31	(1)
Net current-period other comprehensive income (loss)		4	3	7	4
Net current-period other comprehensive income (loss)		33	2	38	3
As of end of period		(169)	(133)	(169)	(133)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
As of beginning of period	[1]	(4)	1	(6)	1
As of beginning of period	[1]	(197)	(136)	(200)	(137)
As of beginning of period	[1]	(201)	$ (135)	(206)	(136)
OCI, before reclassifications	[1]	$ 25		$ 27	$ 4
OCI, before reclassifications	[1]
OCI, before reclassifications	[1]	$ 25		$ 27	$ 4
Amounts reclassified from accumulated OCI	[1]	3	$ (1)	3	(5)
Amounts reclassified from accumulated OCI	[1]	4	3	7	4
Amounts reclassified from accumulated OCI	[1]	7	2	10	(1)
Net current-period other comprehensive income (loss)	[1]	28	(1)	30	(1)
Net current-period other comprehensive income (loss)	[1]	4	3	7	4
Net current-period other comprehensive income (loss)	[1]	32	$ 2	37	$ 3
As of end of period	[1]	24		24
As of end of period	[1]	(193)	$ (133)	(193)	$ (133)
As of end of period	[1]	$ (169)	$ (133)	$ (169)	$ (133)

[1] All amounts are net of income taxes and noncontrolling interest. Amounts in parentheses indicate debits to accumulated other comprehensive loss.