Stockholders' Equity - Narrative - Share Repurchases (Details) - USD ($) shares in Millions, $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2017 |
Jan. 01, 2017 |
Jan. 03, 2016 |
May 04, 2017 |
Jul. 28, 2016 |
|
| Class of Stock [Line Items] | |||||
| Common stock repurchases | $ 251 | $ 249 | $ 274 | ||
| Common stock [Member] | |||||
| Class of Stock [Line Items] | |||||
| Repurchase of common shares (in shares) | 1.4 | 1.8 | 1.7 | ||
| Common stock repurchases | $ 251 | $ 249 | $ 274 | ||
| Dollar amount remaining in authorized stock repurchase program | $ 100 | ||||
| Common stock [Member] | July 2016 Share Repurchase Plan [Member] | |||||
| Class of Stock [Line Items] | |||||
| Stock repurchase program authorized amount | $ 250 | ||||
| Common stock [Member] | May 2017 Share Repurchase Plan [Member] | |||||
| Class of Stock [Line Items] | |||||
| Stock repurchase program authorized amount | $ 250 | ||||