Benefit Plans (Details 8) (USD $) In Millions, unless otherwise specified	Feb. 25, 2012
Pension Benefits [Member]
The estimated future benefit payments to be paid from the Company's defined benefit pension plans and other postretirement benefit plans
2013	$ 106
2014	116
2015	122
2016	130
2017	139
Years 2018-2022	840
Other Postretirement Benefits [Member]
The estimated future benefit payments to be paid from the Company's defined benefit pension plans and other postretirement benefit plans
2013	7
2014	7
2015	7
2016	8
2017	8
Years 2018-2022	$ 42