Pension Benefits (Accumulated Benefit Obligatons) (Details) (Pension [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Jan. 01, 2011
Pension [Member]
Projected benefit obligation	$ 3,077	$ 248
Accumulated benefit obligation	2,882	207
Fair value of plan assets	$ 2,505	$ 11

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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- Definition

If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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