Annual report pursuant to Section 13 and 15(d)

Retirement Plans (Estimated Supplementary Retirement Plan Benefit Payments) (Details)

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Retirement Plans (Estimated Supplementary Retirement Plan Benefit Payments) (Details) (Supplementary Retirement Plan [Member], USD $)
In Millions, unless otherwise specified
Jan. 28, 2012
Supplementary Retirement Plan [Member]
 
2012 $ 55
2013 57
2014 59
2015 59
2016 62
2017-2021 $ 272