Fair Value Measurements (Details) (USD $) In Millions	Jul. 01, 2011 Level 1 inputs Fair Value	Dec. 31, 2010 Level 1 inputs Fair Value	Jul. 01, 2011 Level 1 inputs Fair Value Less than 1 year	Dec. 31, 2010 Level 1 inputs Fair Value Less than 1 year	Jul. 01, 2011 Level 1 inputs Fair Value 1 - 2 years		Dec. 31, 2010 Level 1 inputs Fair Value 1 - 2 years		Jul. 01, 2011 Level 1 inputs Fair Value 1 - 2 years Callable Bonds	Jun. 25, 2010 Level 1 inputs Fair Value 1 - 2 years Callable Bonds	Jul. 01, 2011 Level 1 inputs Fair Value 2 - 5 years		Dec. 31, 2010 Level 1 inputs Fair Value 2 - 5 years		Jul. 01, 2011 Level 1 inputs Fair Value 2 - 5 years Callable Bonds	Jun. 25, 2010 Level 1 inputs Fair Value 2 - 5 years Callable Bonds	Jul. 01, 2011 Level 1 inputs Fair Value Greater than 5 years	Dec. 31, 2010 Level 1 inputs Fair Value Greater than 5 years	Jul. 01, 2011 Level 1 inputs Carrying Value	Dec. 31, 2010 Level 1 inputs Carrying Value	Jul. 01, 2011 Level 2 inputs Fair Value	Dec. 31, 2010 Level 2 inputs Fair Value	Jul. 01, 2011 Level 2 inputs Carrying Value	Dec. 31, 2010 Level 2 inputs Carrying Value
Fair Value, by Balance Sheet Grouping
Investments	$ 151	$ 123	$ 30	$ 44	$ 59	[1]	$ 45	[1]	$ 5	$ 5	$ 62	[1]	$ 31	[1]	$ 5	$ 5	$ 0	$ 3	$ 150	$ 121
Long-term Debt Including Current Maturities																					$ 9,632	$ 9,624	$ 8,680	$ 8,664

[1] The 1-2 year category and the 2-5 year category include callable bonds of approximately $5 million for both 2011 and 2010, which are classified as short-term investments on the consolidated balance sheet.