General (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (2,791.3)	$ (2,796.1)	$ (3,068.3)	$ (2,791.1)
Increase (decrease)	716.8	(60.1)	1,236.8	(66.9)
Income tax impact	80.4	7.3	(61.0)	3.7
Other comprehensive income (loss) before reclassifications, net of income taxes	797.2	(52.8)	1,175.8	(63.2)
Increase (decrease)	166.2	6.1	38.2	13.2
Income tax impact	(35.2)	(1.5)	(8.8)	(3.2)
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	131.0	4.6	29.4	10.0
Total other comprehensive income (loss), net of income taxes	928.2	(48.2)	1,205.2	(53.2)
Ending balance	(1,863.1)	(2,844.3)	(1,863.1)	(2,844.3)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(2,327.2)	(2,108.9)	(2,173.3)	(2,098.1)
Increase (decrease)	1,070.6	(51.9)	939.1	(59.2)
Income tax impact	6.1	5.4	(16.3)	1.9
Other comprehensive income (loss) before reclassifications, net of income taxes	1,076.7	(46.5)	922.8	(57.3)
Increase (decrease)	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
Total other comprehensive income (loss), net of income taxes	1,076.7	(46.5)	922.8	(57.3)
Ending balance	(1,250.5)	(2,155.4)	(1,250.5)	(2,155.4)
Pension & Postretirement Plan Benefit Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(773.3)	(685.7)	(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 (decrease)	10.4	6.1	21.2	13.2
Income tax impact	(2.5)	(1.5)	(5.1)	(3.2)
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	7.9	4.6	16.1	10.0
Total other comprehensive income (loss), net of income taxes	7.9	4.6	16.1	10.0
Ending balance	(765.4)	(681.1)	(765.4)	(681.1)
Unrealized Gain (Loss) on Available-For-Sale Securities Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(0.1)	(1.5)	(0.7)	(1.9)
Increase (decrease)	0.5	0.7	1.2	1.2
Income tax impact	(0.1)	(0.2)	(0.2)	(0.3)
Other comprehensive income (loss) before reclassifications, net of income taxes	0.4	0.5	1.0	0.9
Increase (decrease)	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
Total other comprehensive income (loss), net of income taxes	0.4	0.5	1.0	0.9
Ending balance	0.3	(1.0)	0.3	(1.0)
Cash flow hedge adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	309.3	0.0	(112.8)	0.0
Increase (decrease)	(354.3)	(8.9)	296.5	(8.9)
Income tax impact	74.4	2.1	(44.5)	2.1
Other comprehensive income (loss) before reclassifications, net of income taxes	(279.9)	(6.8)	252.0	(6.8)
Increase (decrease)	155.8	0.0	17.0	0.0
Income tax impact	(32.7)	0.0	(3.7)	0.0
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	123.1	0.0	13.3	0.0
Total other comprehensive income (loss), net of income taxes	(156.8)	(6.8)	265.3	(6.8)
Ending balance	$ 152.5	$ (6.8)	$ 152.5	$ (6.8)