Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities (USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	$ 4	[1]	$ 3	[1]
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	1		1
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	1	[1]	1	[1]
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1]		[1]
Cash and Cash Equivalents [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	5	[1]	4	[1]
Percent of Total	1.00%	[1]		[1]
Cash and Cash Equivalents [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	1		1
Percent of Total	1.00%		1.00%
US Large Cap [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	95	[1],[2]	93	[1],[2]
US Large Cap [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[2]		[2]
US Large Cap [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	203	[1],[2]	205	[1],[2]
US Large Cap [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	51	[2]	52	[2]
US Large Cap [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[2]		[1],[2]
US Large Cap [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[2]		[2]
US Large Cap [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	298	[1],[2]	298	[1],[2]
Percent of Total	33.00%	[1],[2]	33.00%	[1],[2]
US Large Cap [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	51	[2]	52	[2]
Percent of Total	57.00%	[2]	62.00%	[2]
US Small Cap [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	76	[1],[2]	72	[1],[2]
US Small Cap [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[2]		[2]
US Small Cap [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	24	[1],[2]	29	[1],[2]
US Small Cap [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[2]		[2]
US Small Cap [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[2]		[1],[2]
US Small Cap [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[2]		[2]
US Small Cap [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	100	[1],[2]	101	[1],[2]
Percent of Total	11.00%	[1],[2]	11.00%	[1],[2]
US Small Cap [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[2]		[2]
Percent of Total		[2]		[2]
International Companies [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[3]		[1],[3]
International Companies [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[3]		[3]
International Companies [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	123	[1],[3]	139	[1],[3]
International Companies [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	16	[3]	14	[3]
International Companies [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[3]		[1],[3]
International Companies [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[3]		[3]
International Companies [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	123	[1],[3]	139	[1],[3]
Percent of Total	13.00%	[1],[3]	15.00%	[1],[3]
International Companies [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	16	[3]	14	[3]
Percent of Total	18.00%	[3]	17.00%	[3]
Emerging Markets [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[4]		[1],[4]
Emerging Markets [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[4]		[4]
Emerging Markets [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	31	[1],[4]	34	[1],[4]
Emerging Markets [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[4]		[4]
Emerging Markets [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[4]		[1],[4]
Emerging Markets [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[4]		[4]
Emerging Markets [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	31	[1],[4]	34	[1],[4]
Percent of Total	3.00%	[1],[4]	4.00%	[1],[4]
Emerging Markets [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[4]		[4]
Percent of Total		[4]		[4]
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	171	[1]	165	[1]
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	381	[1]	407	[1]
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	67		66
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1]		[1]
Equity Securities [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	552		572
Percent of Total	60.00%	[1]	63.00%	[1]
Equity Securities [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	67		66
Percent of Total	75.00%		79.00%
Equity Securities [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Percent of Total	71.00%		74.00%
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[5]		[1],[5]
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[5]		[5]
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	233	[1],[5]	207	[1],[5]
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	22	[5]	17	[5]
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[5]		[1],[5]
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[5]		[5]
Corporate Debt Securities [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	233	[1],[5]	207	[1],[5]
Percent of Total	25.00%	[1],[5]	23.00%	[1],[5]
Corporate Debt Securities [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	22	[5]	17	[5]
Percent of Total	24.00%	[5]	20.00%	[5]
US Treasury and Government [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1]		[1]
US Treasury and Government [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	33	[1]	29	[1]
US Treasury and Government [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1]		[1]
US Treasury and Government [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	33	[1]	29	[1]
Percent of Total	4.00%	[1]	3.00%	[1]
Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1]		[1]
Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	266	[1]	236	[1]
Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	22		17
Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1]		[1]
Fixed Income Securities [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	266		236
Percent of Total	29.00%	[1]	26.00%	[1]
Fixed Income Securities [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	22		17
Percent of Total	24.00%		20.00%
Fixed Income Securities [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Percent of Total	29.00%		26.00%
Hedge Funds, Global Opportunity [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[6]		[1],[6]
Hedge Funds, Global Opportunity [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[6]		[6]
Hedge Funds, Global Opportunity [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[6]		[1],[6]
Hedge Funds, Global Opportunity [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[6]		[6]
Hedge Funds, Global Opportunity [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	29	[1],[6]	43	[1],[6]
Hedge Funds, Global Opportunity [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[6]		[6]
Hedge Funds, Global Opportunity [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	29	[1],[6]	43	[1],[6]
Percent of Total	3.00%	[1],[6]	5.00%	[1],[6]
Hedge Funds, Global Opportunity [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[6]		[6]
Percent of Total		[6]		[6]
Absolute Return [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[7]		[1],[7]
Absolute Return [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[7]		[7]
Absolute Return [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[7]		[1],[7]
Absolute Return [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[7]		[7]
Absolute Return [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	42	[1],[7]	39	[1],[7]
Absolute Return [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[7]		[7]
Absolute Return [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	42	[1],[7]	39	[1],[7]
Percent of Total	5.00%	[1],[7]	4.00%	[1],[7]
Absolute Return [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[7]		[7]
Percent of Total		[7]		[7]
Private Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[8]		[1],[8]
Private Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[8]		[8]
Private Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1],[8]		[1],[8]
Private Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[8]		[8]
Private Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	20	[1],[8]	22	[1],[8]
Private Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[8]		[8]
Private Equity Funds [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	20	[1],[8]	22	[1],[8]
Percent of Total	2.00%	[1],[8]	2.00%	[1],[8]
Private Equity Funds [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[8]		[8]
Percent of Total		[8]		[8]
Other Types of Investments [Member] | Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1]		[1]
Other Types of Investments [Member] | Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets		[1]		[1]
Other Types of Investments [Member] | Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	91	[1]	104	[1]
Other Types of Investments [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	91		104
Percent of Total	10.00%	[1]	11.00%	[1]
Fair Value, Inputs, Level 1 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	175	[1]	168	[1]
% of Fair Value of Plan Assets	19.00%	[1]	19.00%	[1]
Fair Value, Inputs, Level 1 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	1		1
% of Fair Value of Plan Assets	1.00%		1.00%
Fair Value, Inputs, Level 2 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	648	[1]	644	[1]
% of Fair Value of Plan Assets	71.00%	[1]	70.00%	[1]
Fair Value, Inputs, Level 2 [Member] | Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	89		83
% of Fair Value of Plan Assets	99.00%		99.00%
Fair Value, Inputs, Level 3 [Member] | Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	91	[1]	104	[1]
% of Fair Value of Plan Assets	10.00%	[1]	11.00%	[1]
Pension Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	914	[1]	916	[1]
Percent of Total	100.00%	[1]	100.00%	[1]
% of Fair Value of Plan Assets	100.00%	[1]	100.00%	[1]
Other Postretirement Benefit Plan [Member]
Note 4 - Fair Value Measurements (Details) - Derivative Assets and Liabilities [Line Items]
Fair Value of Plan Assets	$ 90		$ 84
Percent of Total	100.00%		100.00%
% of Fair Value of Plan Assets	100.00%		100.00%

[1] Includes $9 million at December 31, 2014 and December 31, 2013 of medical benefit (health and welfare) component for 401h accounts to fund a portion of the other retirement benefits.

[2] Includes funds that invest primarily in U.S. common stocks.

[3] Includes funds that invest primarily in foreign equity and equity-related securities.

[4] Includes funds that invest primarily in common stocks of emerging markets.

[5] Includes funds that invest primarily in investment grade debt and fixed income securities.

[6] Includes funds that invest in limited / general partnerships, managed accounts, and other investment entities issued by non-traditional firms or "hedge funds."

[7] Includes funds that invest primarily in investment vehicles and commodity pools as a "fund of funds."

[8] Includes funds that invest in private equity and small buyout funds, partnership investments, direct investments, secondary investments, directly / indirectly in real estate and may invest in equity securities of real estate related companies, real estate mortgage loans, and real estate mezzanine loans.