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Revenue (Details) $ / shares in Units, contract in Thousands, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 02, 2017 USD ($) contract $ / shares | Apr. 03, 2016 USD ($) $ / shares | Dec. 31, 2016 USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Operating earnings | $ 1,035 | $ 924 |
Diluted | $ / shares | $ 2.48 | $ 2.04 |
Unbilled revenue | $ 25,979 |  | $ 25,543
Number of active contracts | contract | 10 |  |
Revenue recognized in contract liability balance | $ 1,700 | $ 1,400 |
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Operating earnings | $ 50 | $ 58 |
Diluted | $ / shares | $ 0.11 | $ 0.12 |
Unbilled revenue | $ 72 | $ 68 |
Transferred over Time |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Revenue, Percentage from Products and Services Transferred to Customers | 70.00% | 73.00% |
Transferred at Point in Time |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |
Revenue, Percentage from Products and Services Transferred to Customers | 30.00% | 27.00% |

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