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Commitments And Contingencies minimum lease payments (Tables)
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Dec. 31, 2012
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| Commitments and Contingencies [Abstract] | |||||||||||||||||||||||||||||||||||||
| Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] |
A summary of future minimum lease payments under noncancelable operating leases as of December 31, 2012 follows (amounts in millions):
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