|
Investments (Details 2) (USD $)
In Millions, unless otherwise specified
|
3 Months Ended |
12 Months Ended |
|
Apr. 03, 2015
|
Dec. 31, 2014
|
| Available-for-sale securities, by type |
|
|
| Available-for-sale Debt Securities, Gross Unrealized Loss |
|
$ 101 |
| Available-for-sale Securities, Amortized Cost Basis |
6,848 |
6,483 |
| Available-for-sale Securities, Gross Unrealized Gain |
1,182 |
1,531 |
| Available-for-sale Securities, Gross Unrealized Losses |
(44) |
(135) |
| Available-for-sale Securities Fair Value |
7,986 |
7,879 |
| Equity Securities |
|
|
| Available-for-sale securities, by type |
|
|
| Available-for-sale Securities, Amortized Cost Basis |
3,426 |
2,687 |
| Available-for-sale Securities, Gross Unrealized Gain |
1,073 |
1,463 |
| Available-for-sale Securities, Gross Unrealized Losses |
(20) |
(29) |
| Available-for-sale Securities Fair Value |
4,479 |
4,121 |
| Debt Securities |
|
|
| Available-for-sale securities, by type |
|
|
| Available-for-sale Securities, Amortized Cost Basis |
3,422 |
3,796 |
| Available-for-sale Securities, Gross Unrealized Gain |
109 |
68 |
| Available-for-sale Securities, Gross Unrealized Losses |
(24) |
(106) |
| Available-for-sale Securities Fair Value |
$ 3,507 |
$ 3,758 |