Pensions and Other Employee Benefits (Details 5) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Pension Plans [Member]
Estimated Future Benefit Payments
2012	$ 102
2013	99
2014	110
2015	119
2016	128
Years 2017-2021	809
Postretirement Benefit Plans [Member]
Estimated Future Benefit Payments
2012	12
2013	13
2014	13
2015	14
2016	14
Years 2017-2021	83
Subsidy Receipts, 2012	1
Subsidy Receipts, 2013	1
Subsidy Receipts, 2014	1
Subsidy Receipts, 2015	1
Subsidy Receipts, 2016	1
Subsidy Receipts, Years 2017-2021	$ 5

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The amount of the aggregate benefits expected to be paid in the five fiscal years thereafter (the aggregate amount of benefits expected to be paid in years 6 through 10 after the date of the latest statement of financial position).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

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- Definition

The amount of the benefits expected to be paid in Year 5.

+ References

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- Definition

The amount of the benefits expected to be paid in Year 4.

+ References

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The amount of the benefits expected to be paid in Year 1.

+ References

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The amount of the benefits expected to be paid in Year 3.

+ References

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The amount of the benefits expected to be paid in Year 2.

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- Definition

Aggregate amount for the next five fiscal years following the first five fiscal years (that is the aggregate of fiscal years six through ten) following the balance sheet date of the prescription drug subsidy receipts expected to be received.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 60

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6414203&loc=d3e39716-114964

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS106-2

-Paragraph 22

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

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Amount of the prescription drug subsidy receipts expected to be received in Year 5 after the balance sheet date.

+ References

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Amount of the prescription drug subsidy receipts expected to be received in Year 4 after the balance sheet date.

+ References

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Amount of the prescription drug subsidy receipts expected to be received in Year 1 after the balance sheet date.

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Amount of the prescription drug subsidy receipts expected to be received in Year 3 after the balance sheet date.

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Amount of the prescription drug subsidy receipts expected to be received in Year 2 after the balance sheet date.

+ References

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