Related Party Transactions (Details) - USD ($)						1 Months Ended		12 Months Ended
	Dec. 04, 2017	Jan. 31, 2017	Jun. 01, 2016	Jan. 08, 2016	Jan. 04, 2016	Jan. 31, 2017	Jun. 30, 2016	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Related Party Transaction [Line Items]
Proceeds from common stock sales								$ 0	$ 0	$ 3,000,000
Retained earnings								$ 531,000,000	124,000,000
Aggregate fees and expenses										$ 36,000,000
Termination fee			$ 31,000,000
Cash distribution paid				$ 666,000,000
Distribution declared and paid per share (in USD per share)				$ 3.94						$ 3.94
Cash distribution paid to Sponsors					$ 657,000,000
KKR Capital Markets LLC
Related Party Transaction [Line Items]
Cost of services rendered in connection with debt refinancing transactions							$ 1,000,000
Secondary Offerings
Related Party Transaction [Line Items]
Expenses related to shares sold						$ 5,000,000			$ 1,000,000
IPO | KKR Capital Markets LLC
Related Party Transaction [Line Items]
Underwriter discounts and commissions							$ 5,000,000
Sponsor
Related Party Transaction [Line Items]
Number of shares to be repurchased (in shares)	10,000,000
Common stock repurchase, price per share (in USD per share)	$ 28.00
Stock repurchase program amount paid	$ 280,000,000
Additional paid in capital reduction due to share repurchase program	96,000,000
Retained earnings	$ (184,000,000)
Sponsor | Follow-on Offerings
Related Party Transaction [Line Items]
Proceeds from common stock sales		$ 0
USF Credit Facility
Related Party Transaction [Line Items]
Line of credit				$ 314,000,000