CAPITAL STOCK - Reconciliation of Net Earnings Attributable to Common Shareholders and Weighted Average Shares Outstanding used to Calculate Basic and Diluted Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Jan. 02, 2021	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Jan. 02, 2021		Dec. 28, 2019		Dec. 29, 2018
Numerator
Net Earnings Attributable to Common Shareowners	$ 458.0	$ 385.5	$ 233.5	$ 132.7	$ 198.7	$ 230.0	$ 355.8	$ 169.5	$ 1,209.7	[1]	$ 954.0	[1]	$ 603.4	[1]
Add: Contract adjustment payments accretion	0.2	0.1	0.5	0.9	0.5	0.4	0.4	0.4	1.7	[1]	1.7	[1]	0.9	[1]
Net Earnings Attributable to Common Shareowners - Diluted	$ 458.2	$ 385.6	$ 234.0	$ 133.6	$ 199.2	$ 230.4	$ 356.2	$ 169.9	$ 1,211.4	[1]	$ 955.7	[1]	$ 604.3	[1]
Denominator
Basic earnings per share -- weighted-average shares (in shares)									154,176		148,365		148,919
Weighted Average Number Diluted Shares Outstanding Adjustment									8,251		8,016		7,861
Diluted earnings per share -- weighted-average shares									162,427		156,381		156,780
Basic earnings per share of common stock:
Total basic earnings per share of common stock (USD per share)	$ 2.92	$ 2.47	$ 1.52	$ 0.88	$ 1.33	$ 1.55	$ 2.40	$ 1.15	$ 7.85	[1]	$ 6.43	[1]	$ 4.05	[1]
Diluted earnings per share of common stock:
Total diluted earnings per share of common stock (USD per share)	$ 2.80	$ 2.37	$ 1.45	$ 0.83	$ 1.26	$ 1.48	$ 2.29	$ 1.09	$ 7.46	[1]	$ 6.11	[1]	$ 3.85	[1]

[1] See Note A, Significant Accounting Policies - Restatement, for discussion regarding the impacts of the Restatement.