Share-Based Payments - Performance Total Shareholder Return Units Narrative (Details) - Performance Total Shareholder Return Unit (PTSRUs) [Member] |
Dec. 29, 2017
$ / shares
shares
|
|---|---|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Grant price (in dollars per share) | $ / shares | $ 36.22 |
| Grant-date fair value (in dollars per share) | $ / shares | $ 5.83 |
| Board of Directors Chairman [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Deferred compensation arrangement, shares issued | shares | 1,372,213 |
| Head Of Innovative Health [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Deferred compensation arrangement, shares issued | shares | 343,053 |