Accumulated Other Comprehensive Loss (Reclassifications Out of Accumulated OCI) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
(Gain) loss on cash flow hedges:
(Gain) loss recognized in income on derivatives	$ 463.9	$ 438.2
Income tax impact	17.6	15.7
Total	(75.3)	(66.5)
Amortization of defined benefit pension and postretirement plan items:
Total	3.1	5.4
Cash Flow Hedges
Amortization of defined benefit pension and postretirement plan items:
Total	(1.5)	1.1
Prior Service Cost
Amortization of defined benefit pension and postretirement plan items:
Amortization of defined benefit pension and postretirement plan items:	(1.5)	(1.5)
Net Actuarial Loss
Amortization of defined benefit pension and postretirement plan items:
Amortization of defined benefit pension and postretirement plan items:	7.6	7.3
Pension and Postretirement Benefits
Amortization of defined benefit pension and postretirement plan items:
Amortization of defined benefit pension and postretirement plan items:	6.1	5.8
Income tax impact	(1.5)	(1.5)
Total	4.6	4.3
Amount Reclassified from AOCI | Cash Flow Hedges
(Gain) loss on cash flow hedges:
(Gain) loss recognized in income on derivatives	(2.0)	1.3
Income tax impact	0.5	(0.2)
Total	$ (1.5)	$ 1.1