|
Investments (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2014
|
Apr. 03, 2015
|
|
| Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
| Available-for-sale Debt Securities, Gross Unrealized Loss | $ 101 | |
| Trading Securities | ||
| Trading Securities Unrealized Holding Gains (Losses) | 40 | 43 |
| Marketable Securities | 315 | 255 |
| Other Assets | 94 | 96 |
| Equity Securities [Member] | ||
| Schedule of Trading Securities and Other Trading Assets [Line Items] | ||
| Total trading securities | $ 409 | $ 351 |