Stockholders' Equity (Deficit) - Share Repurchase Program (Details) - Common stock repurchase program - USD ($) $ in Millions	2 Months Ended	12 Months Ended
	Feb. 20, 2018	Dec. 31, 2017	Dec. 25, 2016	Dec. 27, 2015
Share repurchase program
Stock repurchase program, authorized amount		$ 2,075.0
Stock repurchased during period, shares		3,000,000	2,100,000	1,800,000
Stock repurchased during period, value		$ 209.6	$ 122.4	$ 119.8
Subsequent event
Share repurchase program
Stock repurchased during period, shares	546,000
Stock repurchased during period, value	$ 32.7
Stock repurchase program, remaining authorized amount	$ 395.0