Equity and Accumulated Other Comprehensive Income (Loss) - Equity (Details) - USD ($) $ / shares in Units, $ in Millions			6 Months Ended
	Jul. 27, 2018	Sep. 29, 2017	Dec. 31, 2018	Jun. 30, 2018
Equity [Abstract]
Common Stock, Shares Authorized			1,000,000,000	1,000,000,000
Common Stock, Par or Stated Value Per Share			$ 0.01	$ 0.01
Preferred Stock, Shares Authorized			100,000,000	100,000,000
Preferred Stock, Par or Stated Value Per Share			$ 0.01	$ 0.01
Equity offering, sale of common stock	11,400,000	7,400,000
Shares Issued, Price Per Share	$ 40.24	$ 39.10
Equity offering, sale of common stock	$ 445.5	$ 277.8	$ 445.5
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares			700,000
Stock Repurchase Program, Authorized Amount			$ 100.0