General (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2020	Sep. 27, 2019	Oct. 02, 2020	Sep. 27, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			$ (3,068.3)
Other comprehensive income (loss)	$ 842.0	$ (271.3)	2,047.2	$ (324.5)
Ending balance	(1,021.1)		(1,021.1)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(1,250.5)	(2,155.4)	(2,173.3)	(2,098.1)
Increase (decrease)	908.9	(226.8)	1,848.0	(286.0)
Income tax impact	13.9	(9.0)	(2.4)	(7.1)
Other comprehensive income (loss) before reclassifications, net of income taxes	922.8	(235.8)	1,845.6	(293.1)
Increase	0.0	0.0	0.0	0.0
Income tax impact	0.0	0.0	0.0	0.0
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	0.0	0.0	0.0	0.0
Other comprehensive income (loss)	922.8	(235.8)	1,845.6	(293.1)
Ending balance	(327.7)	(2,391.2)	(327.7)	(2,391.2)
Pension & Postretirement Plan Benefit Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(765.4)	(681.1)	(781.5)	(691.1)
Increase (decrease)	0.0	0.0	0.0	0.0
Income tax impact	0.0	0.0	0.0	0.0
Other comprehensive income (loss) before reclassifications, net of income taxes	0.0	0.0	0.0	0.0
Increase	11.6	7.5	32.8	20.7
Income tax impact	(2.7)	(1.7)	(7.8)	(4.9)
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	8.9	5.8	25.0	15.8
Other comprehensive income (loss)	8.9	5.8	25.0	15.8
Ending balance	(756.5)	(675.3)	(756.5)	(675.3)
Unrealized Gain (Loss) on Available-For-Sale Securities Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	0.3	(1.0)	(0.7)	(1.9)
Increase (decrease)	0.0	0.6	1.2	1.8
Income tax impact	0.0	(0.1)	(0.2)	(0.4)
Other comprehensive income (loss) before reclassifications, net of income taxes	0.0	0.5	1.0	1.4
Increase	0.0	0.0	0.0	0.0
Income tax impact	0.0	0.0	0.0	0.0
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	0.0	0.0	0.0	0.0
Other comprehensive income (loss)	0.0	0.5	1.0	1.4
Ending balance	0.3	(0.5)	0.3	(0.5)
Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	152.5	(6.8)	(112.8)	0.0
Increase (decrease)	(304.9)	(55.1)	(8.4)	(64.0)
Income tax impact	47.8	13.3	3.3	15.4
Other comprehensive income (loss) before reclassifications, net of income taxes	(257.1)	(41.8)	(5.1)	(48.6)
Increase	167.5	0.0	184.5	0.0
Income tax impact	(0.1)	0.0	(3.8)	0.0
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	167.4	0.0	180.7	0.0
Other comprehensive income (loss)	(89.7)	(41.8)	175.6	(48.6)
Ending balance	62.8	(48.6)	62.8	(48.6)
AOCI Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(1,863.1)	(2,844.3)	(3,068.3)	(2,791.1)
Increase (decrease)	604.0	(281.3)	1,840.8	(348.2)
Income tax impact	61.7	4.2	0.7	7.9
Other comprehensive income (loss) before reclassifications, net of income taxes	665.7	(277.1)	1,841.5	(340.3)
Increase	179.1	7.5	217.3	20.7
Income tax impact	(2.8)	(1.7)	(11.6)	(4.9)
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	176.3	5.8	205.7	15.8
Other comprehensive income (loss)	842.0	(271.3)	2,047.2	(324.5)
Ending balance	(1,021.1)	(3,115.6)	(1,021.1)	(3,115.6)
AOCI Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income (loss)		1.2		1.2
Ending balance		(27.3)		(27.3)
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income (loss)	$ 842.0	(270.1)	$ 2,047.2	(323.3)
Ending balance		$ (3,088.3)		$ (3,088.3)