Note 8 - Debt (Details) (USD $)				9 Months Ended					3 Months Ended		9 Months Ended																														9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 GSI	Sep. 30, 2012 Commercial Paper [Member]	Dec. 31, 2011 Commercial Paper [Member]	Sep. 30, 2012 Notes Payable, Other Payables [Member]	Dec. 31, 2011 Notes Payable, Other Payables [Member]	Sep. 30, 2012 Line of Credit [Member]	Sep. 30, 2012 Unsecured Debt [Member]	Sep. 30, 2011 Unsecured Debt [Member]	Sep. 30, 2012 Unsecured Debt [Member]	Sep. 30, 2011 Unsecured Debt [Member]	Jul. 31, 2012 Unsecured Debt [Member]	Dec. 31, 2011 Unsecured Debt [Member]	Sep. 30, 2012 Unsecured Debt [Member] Notes 2013 - October [Member]	Dec. 31, 2011 Unsecured Debt [Member] Notes 2013 - October [Member]	Dec. 31, 2010 Unsecured Debt [Member] Notes 2013 - October [Member]	Sep. 30, 2012 Unsecured Debt [Member] Notes 2015 - October [Member]	Dec. 31, 2011 Unsecured Debt [Member] Notes 2015 - October [Member]	Dec. 31, 2010 Unsecured Debt [Member] Notes 2015 - October [Member]	Sep. 30, 2012 Unsecured Debt [Member] Notes 2015 - July [Member]	Jul. 31, 2012 Unsecured Debt [Member] Notes 2015 - July [Member]	Dec. 31, 2011 Unsecured Debt [Member] Notes 2015 - July [Member]	Sep. 30, 2012 Unsecured Debt [Member] Notes 2017 [Member]	Jul. 31, 2012 Unsecured Debt [Member] Notes 2017 [Member]	Dec. 31, 2011 Unsecured Debt [Member] Notes 2017 [Member]	Sep. 30, 2012 Unsecured Debt [Member] Notes 2020 - October [Member]	Dec. 31, 2011 Unsecured Debt [Member] Notes 2020 - October [Member]	Dec. 31, 2010 Unsecured Debt [Member] Notes 2020 - October [Member]	Sep. 30, 2012 Unsecured Debt [Member] Notes 2022 [Member]	Jul. 31, 2012 Unsecured Debt [Member] Notes 2022 [Member]	Dec. 31, 2011 Unsecured Debt [Member] Notes 2022 [Member]	Sep. 30, 2012 Unsecured Debt [Member] Notes 2042 [Member]	Jul. 31, 2012 Unsecured Debt [Member] Notes 2042 [Member]	Dec. 31, 2011 Unsecured Debt [Member] Notes 2042 [Member]	Sep. 30, 2012 Unsecured Debt [Member] Fair Value, Inputs, Level 2 [Member]	Sep. 30, 2012 Notes Payable, Other Payables [Member]	Dec. 31, 2011 Notes Payable, Other Payables [Member]	Sep. 30, 2012 Capital Lease Obligations [Member]	Dec. 31, 2011 Capital Lease Obligations [Member]	Sep. 30, 2012 Capital Lease Obligations [Member] GSI	Sep. 30, 2012 Mortgages [Member]
Long-term Debt
Coupon Rate															0.875%	0.875%		1.625%	1.625%		0.70%			1.35%			3.25%	3.25%		2.60%			4.00%									6.30%
Long-term debt									$ 4,487,000,000		$ 4,487,000,000			$ 1,495,000,000	$ 400,000,000	$ 400,000,000		$ 598,000,000	$ 598,000,000		$ 250,000,000		$ 0	$ 999,000,000		$ 0	$ 498,000,000	$ 497,000,000		$ 999,000,000		$ 0	$ 743,000,000		$ 0		$ 13,000,000	$ 15,000,000	$ 6,000,000	$ 15,000,000
Total long-term debt	4,506,000,000	1,525,000,000
Effective Interest Rate															1.078%	1.078%		1.805%	1.805%		0.82%			1.456%			3.389%	3.389%		2.678%			4.114%
Short-term Debt
Short-term debt				0	550,000,000	2,000,000	2,000,000
Capital lease obligations, current	10,000,000	13,000,000
Total short-term debt	12,000,000	565,000,000
Total debt	4,518,000,000	2,090,000,000
Senior Notes
Debt Instrument, Face Amount									1,500,000,000		1,500,000,000		3,000,000,000				400,000,000			600,000,000		250,000,000			1,000,000,000				500,000,000		1,000,000,000			750,000,000
Interest expense									21,000,000	8,000,000	37,000,000	24,000,000
Estimated fair value of notes included in long-term debt																																				4,600,000,000
Capital Lease Obligations
Interest rate, minimum																																									3.00%
Interest rate, maximum																																									9.00%
Gross capital lease obligations			17,000,000
Imputed interest			(1,000,000)
Total present value of future minimum capital lease payments			16,000,000
Commercial Paper
Commercial paper program amount				2,000,000,000
Maximum days to maturity of debt instruments				397 days
Credit Agreement
Borrowings outstanding								0
Letters of credit outstanding								0
Maximum borrowing capacity on unsecured revolving credit facility								3,000,000,000
Commercial paper program amount				2,000,000,000
Available borrowing capacity								2,000,000,000
Line of credit facility remaining borrowing capacity								$ 1,000,000,000