Revenue from Contracts with Customers - Contract Cost Balances (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 29, 2018 |
Sep. 29, 2018 |
Jan. 01, 2018 |
Dec. 31, 2017 |
|
Capitalized Contract Cost [Line Items] | ||||
Current contract cost assets | $ 57,000,000 | $ 57,000,000 | $ 62,000,000 | $ 62,000,000 |
Non-current contract cost assets | 95,000,000 | 95,000,000 | $ 85,000,000 | $ 0 |
Contract cost, amortization | $ 11,000,000 | $ 34,000,000 | ||
Minimum | ||||
Capitalized Contract Cost [Line Items] | ||||
Capitalized contract cost, amortization period | 1 year | |||
Maximum | ||||
Capitalized Contract Cost [Line Items] | ||||
Capitalized contract cost, amortization period | 4 years |