Additional Information (Schedule Of Rental Commitments And Sublease Income Under Non-Cancelable Operating Leases) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Rental Commitments [Member]
Operating Leased Assets [Line Items]
2012	$ 56
2013	46
2014	37
2015	25
2016	21
Thereafter	110
Total	295
Sublease Income [Member]
Operating Leased Assets [Line Items]
2012	2
2013	3
2014	3
2015	4
2016	4
Thereafter	29
Total	$ 45

The total of future contractually required payments on leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within one year of the balance sheet date relating to leases defined as operating.

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- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fifth year of the balance sheet date relating to leases defined as operating.

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- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the fourth year of the balance sheet date relating to leases defined as operating.

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- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the third year of the balance sheet date relating to leases defined as operating.

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- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within the second year of the balance sheet date relating to leases defined as operating.

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- Definition

For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due after the fifth year from the balance sheet date on leases defined as operating.

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