Commitments And Contingencies (Schedule Of Components Of Purchase Commitments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Long-term Purchase Commitment [Line Items]
Payments Due by Remainder Of Fiscal Year 2012	$ 320
Payments Due by Fiscal Year 2013	309
Payments Due by Fiscal Year 2014	281
Payments Due by Fiscal Year 2015	277
Payments Due by Fiscal Year 2016	249
Payments Due by Fiscal Year, Thereafter	3,083
Payments Due by Fiscal Year, Total	4,519
Core Segment [Member]
Long-term Purchase Commitment [Line Items]
Payments Due by Remainder Of Fiscal Year 2012	300
Payments Due by Fiscal Year 2013	274
Payments Due by Fiscal Year 2014	250
Payments Due by Fiscal Year 2015	246
Payments Due by Fiscal Year 2016	219
Payments Due by Fiscal Year, Thereafter	2,804
Payments Due by Fiscal Year, Total	4,093
Performance Segment [Member]
Long-term Purchase Commitment [Line Items]
Payments Due by Remainder Of Fiscal Year 2012	18
Payments Due by Fiscal Year 2013	34
Payments Due by Fiscal Year 2014	31
Payments Due by Fiscal Year 2015	31
Payments Due by Fiscal Year 2016	30
Payments Due by Fiscal Year, Thereafter	279
Payments Due by Fiscal Year, Total	423
New Business Segment [Member]
Long-term Purchase Commitment [Line Items]
Payments Due by Remainder Of Fiscal Year 2012	1
Payments Due by Fiscal Year 2013	1
Payments Due by Fiscal Year, Total	2
Specialty Fluids Segment [Member]
Long-term Purchase Commitment [Line Items]
Payments Due by Remainder Of Fiscal Year 2012	1
Payments Due by Fiscal Year, Total	$ 1