Earnings Per Share - Computation (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Basic:
Net income	$ 169	$ 136	$ 124	$ 115	$ 115	$ 127	$ 70	$ 109	$ 544	$ 421	$ 17
Weighted-average shares outstanding									53,991,249	53,591,655	53,021,761
Basic earnings per share (in USD per share)	$ 3.13	$ 2.52	$ 2.28	$ 2.14	$ 2.14	$ 2.37	$ 1.31	$ 2.04	$ 10.08	$ 7.86	$ 0.33
Diluted:
Net income	$ 169	$ 136	$ 124	$ 115	$ 115	$ 127	$ 70	$ 109	$ 544	$ 421	$ 17
Weighted-average shares outstanding									53,991,249	53,591,655	53,021,761
Dilutive shares									603,168	708,157	667,071
Diluted weighted-average shares outstanding									54,594,417	54,299,812	53,688,832
Diluted earnings per share (in USD per share)	$ 3.10	$ 2.50	$ 2.26	$ 2.12	$ 2.11	$ 2.34	$ 1.29	$ 2.01	$ 9.97	$ 7.76	$ 0.32