Earnings per Share - Computation of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Basic:
Net income (loss)	$ 127	$ (12)	$ 306	$ 13
Weighted-average shares outstanding (in shares)	53,740,174	52,220,868	53,516,859	52,964,066
Basic earnings per share (USD per share)	$ 2.37	$ (0.23)	$ 5.72	$ 0.25
Diluted:
Net income (loss)	$ 127	$ (12)	$ 306	$ 13
Weighted-average shares outstanding (in shares)	53,740,174	52,220,868	53,516,859	52,964,066
Dilutive shares (in shares)	684,706	0	720,694	667,433
Diluted weighted-average shares outstanding (in shares)	54,424,880	52,220,868	54,237,553	53,631,499
Diluted earnings per share (USD per share)	$ 2.34	$ (0.23)	$ 5.64	$ 0.25