SIGNIFICANT ACCOUNTING POLICIES -Schedule of Accounting Change (Details) - 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		Dec. 30, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]
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]
Basic (in dollars 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 (in dollars 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]
Weighted average shares outstanding, basic (in shares)										154,176		148,365		148,919
Weighted average shares outstanding, diluted (in shares)										162,427		156,381		156,780
Net Cash Provided by (Used in) Financing Activities										$ 615.9	[2]	$ (292.5)		$ (561.6)
Preferred Stock, Value, Issued		$ 1,370.3				$ 1,230.0				1,370.3		1,230.0		607.9		$ 606.1
Retained earnings		7,542.2				6,768.1				7,542.2		6,768.1		6,216.1		5,997.6
Additional paid in capital		4,967.8				4,767.6				4,967.8		4,767.6		4,766.0		4,788.2
Total Shareowners’ Equity	[1]	11,066.4				9,142.2				11,066.4		9,142.2		7,839.9		8,305.0
Proceeds from issuance of remarketed preferred stock										750.0	[2]	0.0		0.0
Proceeds from issuances of common stock										147.0	[2]	146.0		38.5
Comprehensive income attributable to common shareowners										1,380.6		883.7		378.2
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Earnings Attributable to Common Shareowners		458.0	$ 385.5	$ 233.7	$ 133.2	199.1	$ 230.5	$ 356.3	$ 169.9	1,210.4		955.8		605.2
Add: Contract adjustment payments accretion		0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0		0.0		0.0
Net Earnings Attributable to Common Shareowners - Diluted		$ 458.0	$ 385.5	$ 233.7	$ 133.2	$ 199.1	$ 230.5	$ 356.3	$ 169.9	$ 1,210.4		$ 955.8		$ 605.2
Basic (in dollars per share)		$ 2.92	$ 2.47	$ 1.52	$ 0.89	$ 1.34	$ 1.55	$ 2.41	$ 1.15	$ 7.85		$ 6.44		$ 4.06
Diluted (in dollars per share)		$ 2.88	$ 2.44	$ 1.52	$ 0.88	$ 1.32	$ 1.53	$ 2.37	$ 1.13	$ 7.77		$ 6.35		$ 3.99
Weighted average shares outstanding, basic (in shares)										154,176		148,365		148,919
Weighted average shares outstanding, diluted (in shares)										155,861		150,558		151,643
Net Cash Provided by (Used in) Financing Activities										$ 615.9
Preferred Stock, Value, Issued		$ 1,500.0				$ 1,500.0				1,500.0		$ 1,500.0		$ 750.0		750.0
Retained earnings		7,547.6				6,772.8				7,547.6		6,772.8		6,219.0		5,998.7
Additional paid in capital		4,832.7				4,492.9				4,832.7		4,492.9		4,621.0		4,643.2
Total Shareowners’ Equity		11,066.4				9,142.2				11,066.4		9,142.2		7,839.9		8,305.0
Proceeds from issuance of remarketed preferred stock										0.0
Proceeds from issuances of common stock										897.0
Comprehensive income attributable to common shareowners										1,381.3		885.5		380.0
Revision of Prior Period, Error Correction, Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net Earnings Attributable to Common Shareowners		0.0	$ 0.0	$ (0.2)	$ (0.5)	(0.4)	$ (0.5)	$ (0.5)	$ (0.4)	(0.7)		(1.8)		(1.8)
Add: Contract adjustment payments accretion		0.2	0.1	0.5	0.9	0.5	0.4	0.4	0.4	1.7		1.7		0.9
Net Earnings Attributable to Common Shareowners - Diluted		$ 0.2	$ 0.1	$ 0.3	$ 0.4	$ 0.1	$ (0.1)	$ (0.1)	$ 0.0	$ 1.0		$ (0.1)		$ (0.9)
Basic (in dollars per share)		$ 0	$ 0	$ 0	$ (0.01)	$ (0.01)	$ 0	$ (0.01)	$ 0	$ 0		$ (0.01)		$ (0.01)
Diluted (in dollars per share)		$ (0.08)	$ (0.07)	$ (0.07)	$ (0.05)	$ (0.06)	$ (0.05)	$ (0.08)	$ (0.04)	$ (0.31)		$ (0.24)		$ (0.14)
Weighted average shares outstanding, basic (in shares)										0		0		0
Weighted average shares outstanding, diluted (in shares)										6,566		5,823		5,137
Net Cash Provided by (Used in) Financing Activities										$ 0.0
Preferred Stock, Value, Issued		$ (129.7)				$ (270.0)				(129.7)		$ (270.0)		$ (142.1)		(143.9)
Retained earnings		(5.4)				(4.7)				(5.4)		(4.7)		(2.9)		(1.1)
Additional paid in capital		135.1				274.7				135.1		274.7		145.0		145.0
Total Shareowners’ Equity		$ 0.0				$ 0.0				0.0		0.0		0.0		$ 0.0
Proceeds from issuance of remarketed preferred stock										750.0
Proceeds from issuances of common stock										(750.0)
Comprehensive income attributable to common shareowners										$ (0.7)		$ (1.8)		$ (1.8)

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

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