Summary of Significant Accounting Policies (Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 02, 2022	Jan. 03, 2021	Dec. 29, 2019
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning stockholders’ equity		$ 3,228.6	$ 2,714.7	$ 2,229.7
Other comprehensive income (loss) before reclassifications		(26.4)	52.0
Amounts reclassified from AOCI		26.5	(6.3)
Net other comprehensive income (loss)	[1]	0.1	45.7	17.4
Ending stockholders' equity		7,622.0	3,228.6	2,714.7
Gain (loss) on cash flow hedges:
Gain (loss) recognized in income on derivatives		2,772.9	1,905.3	1,920.3
Income tax impact		88.5	67.8	71.4
Total		445.3	401.9	402.3
Amortization of defined benefit pension and postretirement plan items:
Income tax impact		(88.5)	(67.8)	(71.4)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning stockholders’ equity		(84.6)	(150.4)
Other comprehensive income (loss) before reclassifications		(44.4)	65.8
Amounts reclassified from AOCI		0.0	0.0
Net other comprehensive income (loss)		(44.4)	65.8
Ending stockholders' equity		(129.0)	(84.6)	(150.4)
Cash Flow Hedges and other
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning stockholders’ equity		2.3	(2.3)
Other comprehensive income (loss) before reclassifications		18.0	(13.8)
Amounts reclassified from AOCI		(23.7)	18.4
Net other comprehensive income (loss)		(5.7)	4.6
Ending stockholders' equity		(3.4)	2.3	(2.3)
Cash Flow Hedges and other | Amount reclassified from AOCI
Gain (loss) on cash flow hedges:
Gain (loss) recognized in income on derivatives		(31.7)	24.8
Income tax impact		8.0	(6.4)
Total		(23.7)	18.4
Amortization of defined benefit pension and postretirement plan items:
Income tax impact		(8.0)	6.4
Pension and Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning stockholders’ equity		(347.8)	(323.1)
Other comprehensive income (loss) before reclassifications		0.0	0.0
Amounts reclassified from AOCI		50.2	(24.7)
Net other comprehensive income (loss)		50.2	(24.7)
Ending stockholders' equity		(297.6)	(347.8)	(323.1)
Pension and Postretirement Benefits | Amount reclassified from AOCI
Gain (loss) on cash flow hedges:
Income tax impact		9.7	(8.2)
Amortization of defined benefit pension and postretirement plan items:
Income before income taxes		59.9	(32.9)
Income tax impact		(9.7)	8.2
Net of tax		50.2	(24.7)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning stockholders’ equity		(430.1)	(475.8)	(493.2)
Net other comprehensive income (loss)		0.1	45.7	17.4
Ending stockholders' equity		(430.0)	(430.1)	$ (475.8)
Amortization of prior service cost | Amount reclassified from AOCI
Amortization of defined benefit pension and postretirement plan items:
Income before income taxes		(3.5)	(6.0)
Amortization of net actuarial loss | Amount reclassified from AOCI
Amortization of defined benefit pension and postretirement plan items:
Income before income taxes		26.8	22.8
Pension adjustments | Amount reclassified from AOCI
Amortization of defined benefit pension and postretirement plan items:
Income before income taxes		$ 36.6	$ (49.7)

[1] Net of income tax expense of $11.7 million in 2021, income tax benefit of $9.8 million for 2020 and income tax benefit of $6.6 million for 2019.