General (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jul. 01, 2016	Jun. 30, 2017	Jul. 01, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			$ (3,021.7)
Total other comprehensive income (loss), net of income taxes	$ 290.7	$ (154.7)	607.2	$ (80.0)
Ending balance	(2,414.5)		(2,414.5)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(2,093.9)	(1,596.3)	(2,398.2)	(1,797.4)
Increase (decrease)	274.9	(161.9)	579.2	39.2
Income tax impact	0.0	0.0	0.0	0.0
Other comprehensive income (loss) before reclassifications, net of income taxes	274.9	(161.9)	579.2	39.2
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	274.9	(161.9)	579.2	39.2
Ending balance	(1,819.0)	(1,758.2)	(1,819.0)	(1,758.2)
Pension and postretirement plan benefit adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(637.3)	(642.0)	(642.2)	(647.3)
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)	7.6	8.6	15.2	16.4
Income tax impact	(2.7)	(2.8)	(5.4)	(5.3)
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	4.9	5.8	9.8	11.1
Total other comprehensive income (loss), net of income taxes	4.9	5.8	9.8	11.1
Ending balance	(632.4)	(636.2)	(632.4)	(636.2)
Unrealized Gain (Loss) on Available-For-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	26.0	1.8	18.7	133.5
Increase (decrease)	17.4	2.3	29.1	14.9
Income tax impact	(6.5)	(0.9)	(10.9)	(5.6)
Other comprehensive income (loss) before reclassifications, net of income taxes	10.9	1.4	18.2	9.3
Increase (decrease)	0.0	0.0	0.0	(223.4)
Income tax impact	0.0	0.0	0.0	83.8
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	0.0	0.0	0.0	(139.6)
Total other comprehensive income (loss), net of income taxes	10.9	1.4	18.2	(130.3)
Ending balance	36.9	3.2	36.9	3.2
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(2,705.2)	(2,236.5)	(3,021.7)	(2,311.2)
Increase (decrease)	292.3	(159.6)	608.3	54.1
Income tax impact	(6.5)	(0.9)	(10.9)	(5.6)
Other comprehensive income (loss) before reclassifications, net of income taxes	285.8	(160.5)	597.4	48.5
Increase (decrease)	7.6	8.6	15.2	(207.0)
Income tax impact	(2.7)	(2.8)	(5.4)	78.5
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	4.9	5.8	9.8	(128.5)
Total other comprehensive income (loss), net of income taxes	290.7	(154.7)	607.2	(80.0)
Ending balance	$ (2,414.5)	$ (2,391.2)	$ (2,414.5)	$ (2,391.2)