Pension and Other Employee Benefits (Schedule of Marketable Securities) (Details) - USD ($) $ in Millions |
Oct. 02, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Fair Value, Inputs, Level 1 [Member] | Marketable Securities in Trust [Member] | ||
| Marketable Securities [Line Items] | ||
| Marketable securities held in trust | $ 545 | $ 525 |