General (Components of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Apr. 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	316.5	$ 74.7
Ending balance	(2,705.2)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(2,398.2)	(1,797.4)
Increase (decrease)	304.3	201.1
Income tax impact	0.0	0.0
Other comprehensive income (loss) before reclassifications, net of income taxes	304.3	201.1
Increase (decrease)	0.0	0.0
Income tax impact	0.0	0.0
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	0.0	0.0
Total other comprehensive income (loss), net of income taxes	304.3	201.1
Ending balance	(2,093.9)	(1,596.3)
Pension and postretirement plan benefit adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(642.2)	(647.3)
Increase (decrease)	0.0	0.0
Income tax impact	0.0	0.0
Other comprehensive income (loss) before reclassifications, net of income taxes	0.0	0.0
Increase (decrease)	7.6	7.8
Income tax impact	(2.7)	(2.5)
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	4.9	5.3
Total other comprehensive income (loss), net of income taxes	4.9	5.3
Ending balance	(637.3)	(642.0)
Unrealized Gain (Loss) on Available-For-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	18.7	133.5
Increase (decrease)	11.7	12.6
Income tax impact	(4.4)	(4.7)
Other comprehensive income (loss) before reclassifications, net of income taxes	7.3	7.9
Increase (decrease)	0.0	(223.4)
Income tax impact	0.0	83.8
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	0.0	(139.6)
Total other comprehensive income (loss), net of income taxes	7.3	(131.7)
Ending balance	26.0	1.8
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(3,021.7)	(2,311.2)
Increase (decrease)	316.0	213.7
Income tax impact	(4.4)	(4.7)
Other comprehensive income (loss) before reclassifications, net of income taxes	311.6	209.0
Increase (decrease)	7.6	(215.6)
Income tax impact	(2.7)	81.3
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	4.9	(134.3)
Total other comprehensive income (loss), net of income taxes	316.5	74.7
Ending balance	$ (2,705.2)	$ (2,236.5)