Accumulated Other Comprehensive Loss (Reclassifications Out of Accumulated OCI) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
(Gain) loss on cash flow hedges:
(Gain) loss recognized in income on derivatives	$ 405.8	$ 317.0	$ 1,178.3	$ 978.0
Income tax benefit	12.7	10.4	39.1	43.3
Total	(69.0)	(52.0)	(159.6)	(137.9)
Amortization of defined benefit pension and postretirement plan items:
Total	4.5	3.2	16.3	12.9
Cash Flow Hedges
Amortization of defined benefit pension and postretirement plan items:
Total	1.3	(0.1)	6.3	2.1
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)	(4.5)	(4.5)
Net Actuarial Loss
Amortization of defined benefit pension and postretirement plan items:
Amortization of defined benefit pension and postretirement plan items	6.7	6.6	20.8	21.0
Pension and Postretirement Benefits
Amortization of defined benefit pension and postretirement plan items:
Amortization of defined benefit pension and postretirement plan items	5.2	5.1	16.3	16.5
Income tax benefit	(2.0)	(1.8)	(6.3)	(5.7)
Total	3.2	3.3	10.0	10.8
Amount Reclassified from AOCI | Cash Flow Hedges
(Gain) loss on cash flow hedges:
(Gain) loss recognized in income on derivatives	1.8	(0.1)	8.5	2.9
Income tax benefit	(0.5)	0.0	(2.2)	(0.8)
Total	$ 1.3	$ (0.1)	$ 6.3	$ 2.1