Debt (Details 4) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Long-term debt maturities
2012	$ 1,220
2013	1,596
2014	1,967
2015	1,824
2016	950
2017	715
2018	1,116
2019	904
2020	702
2021	173
Thereafter	155
Total principal due	11,322
Unamortized net (discounts) premiums	(60)	59,300
Net carrying balance	11,382
Wholly Owned [Member]
Long-term debt maturities
2012	859
2013	997
2014	951
2015	1,802
2016	813
2017	713
2018	1,052
2019	903
2020	701
2021	172
Thereafter	153
Total principal due	9,116
Unamortized net (discounts) premiums	(21)
Net carrying balance	9,137
Wholly Owned [Member] \| Senior Debt [Member]
Long-term debt maturities
2012	76
2013	376
2014	374
2015	287
2016	638
2017	700
2018	900
2019	647
2020	690
2021	0
Thereafter	0
Total principal due	4,688
Unamortized net (discounts) premiums	(84)
Net carrying balance	4,772
Wholly Owned [Member] \| Exchangeable Notes [Member]
Long-term debt maturities
2012	458
2013	482
2014	0
2015	460
Total principal due	1,400
Unamortized net (discounts) premiums	85
Net carrying balance	1,315
Wholly Owned [Member] \| Credit Facilities [Member]
Long-term debt maturities
2012	0
2013	0
2014	291
2015	644
Total principal due	935
Unamortized net (discounts) premiums	(2)
Net carrying balance	937
Wholly Owned [Member] \| Other debt [Member]
Long-term debt maturities
2012	162
2013	1
2014	1
2015	202
2016	1
2017	1
2018	1
2019	1
2020	1
Thereafter	10
Total principal due	381
Unamortized net (discounts) premiums	(6)
Net carrying balance	387
Wholly Owned [Member] \| Mortgage Debt [Member]
Long-term debt maturities
2012	163
2013	138
2014	285
2015	209
2016	174
2017	12
2018	151
2019	255
2020	10
2021	172
Thereafter	143
Total principal due	1,712
Unamortized net (discounts) premiums	(14)
Net carrying balance	1,726
Consolidated Investees [Member]
Long-term debt maturities
2012	361
2013	599
2014	1,016
2015	22
2016	137
2017	2
2018	64
2019	1
2020	1
2021	1
Thereafter	2
Total principal due	2,206
Unamortized net (discounts) premiums	(39)
Net carrying balance	$ 2,245

Long-term debt maturities repayments of principal in year eight.

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Long-term debt maturities repayments of principal in year nine

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Long-term debt maturities repayments of principal in year seven.

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Long-term debt maturities repayments of Principal in year six.

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Long-term debt maturities repayments of principal in year ten.

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Total principal of long-term debt outstanding, excludes any discounts or premiums.

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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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-Article 7

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Amount of long-term debt maturities after year five following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates.

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Amount of long-term debt maturing within the next twelve months following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates.

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Amount of long-term debt maturing in year five following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates.

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Amount of long-term debt maturing in year four following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates.

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Amount of long-term debt maturing in year three following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed of determinable prices and dates.

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Amount of long-term debt maturing in year two following the date of the latest balance sheet presented in the financial statements, which may include maturities of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates.

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